Merge branch 'develop'

.gitignore

@@ -103,3 +103,4 @@ release.properties
 graphenej/build
 
 local.properties
+

build.gradle

@@ -3,11 +3,27 @@ subprojects {
     mavenCentral()
   }
 }
+allprojects {
+    repositories {
+        mavenCentral()
+        jcenter()
+        maven {
+            url "https://maven.google.com"
+        }
+    }
+}
 buildscript {
     repositories {
         mavenCentral()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
+        google()
+        jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.0'
+        classpath 'com.android.tools.build:gradle:3.4.2'
+        classpath 'com.novoda:bintray-release:0.9.1'
     }
 }

gradle.properties

@@ -17,8 +17,8 @@
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 
-VERSION_NAME=0.4.6
+VERSION_NAME=0.4.7-alpha3
-VERSION_CODE=9
+VERSION_CODE=12
 GROUP=com.github.bilthon
 
 POM_DESCRIPTION=A Java library for mobile app Developers; Graphene/Bitshares blockchain.

graphenej/build.gradle

@@ -1,34 +1,54 @@
-group 'cy.agorise'
+apply plugin: 'com.novoda.bintray-release'
-version '0.4.6'
-
 apply plugin: 'com.android.library'
-apply from: 'maven-push.gradle'
 
-
+publish {
-dependencies {
+    userOrg = 'bilthon'
-    testCompile group: 'junit', name: 'junit', version: '4.12'
+    groupId = 'cy.agorise.graphenej'
-    compile 'com.neovisionaries:nv-websocket-client:1.30'
+    artifactId = 'graphenej'
-    compile 'org.bitcoinj:bitcoinj-core:0.14.3'
+    publishVersion = '0.6.0'
-    compile group: 'com.google.code.gson', name: 'gson', version: '2.8.0'
+    repoName = 'Graphenej'
-    compile group: "org.tukaani", name: "xz", version: "1.6"
+    desc = 'A Java library for mobile app Developers; Graphene/Bitshares blockchain.'
+    website = 'https://github.com/Agorise/graphenej'
 }
 
-
 android {
-    compileSdkVersion 24
+    compileSdkVersion 28
-    buildToolsVersion "25.0.0"
 
     defaultConfig {
-        minSdkVersion 9
+        minSdkVersion 14
-        targetSdkVersion 24
+        targetSdkVersion 28
-        versionCode 9
+        versionCode 12
-        versionName "0.4.6"
+        versionName "0.6.0"
         vectorDrawables.useSupportLibrary = true
     }
     buildTypes {
+        debug{}
+        preRelease{}
         release {
             minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
         }
     }
+    defaultConfig {
+        multiDexEnabled true
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+}
+
+dependencies {
+    testImplementation group: 'junit', name: 'junit', version: '4.12'
+    implementation 'com.neovisionaries:nv-websocket-client:1.30'
+    implementation 'org.bitcoinj:bitcoinj-core:0.14.3'
+    implementation 'com.google.code.gson:gson:2.8.5'
+    implementation 'org.tukaani:xz:1.6'
+
+    androidTestImplementation 'com.android.support:support-annotations:28.0.0'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test:rules:1.0.2'
+
+    //  Rx dependencies
+    api 'io.reactivex.rxjava2:rxandroid:2.1.0'
+    api 'io.reactivex.rxjava2:rxjava:2.2.2'
+    api 'com.jakewharton.rxrelay2:rxrelay:2.1.0'
+    api 'com.squareup.okhttp3:okhttp:3.12.2'
 }

graphenej/src/androidTest/java/cy/agorise/graphenej/NodeLatencyVerifierTest.java

@@ -0,0 +1,90 @@
+package cy.agorise.graphenej;
+
+import android.support.test.runner.AndroidJUnit4;
+import android.util.Log;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.network.FullNode;
+import cy.agorise.graphenej.network.LatencyNodeProvider;
+import cy.agorise.graphenej.network.NodeLatencyVerifier;
+import cy.agorise.graphenej.network.NodeProvider;
+import io.reactivex.Observer;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.subjects.PublishSubject;
+
+@RunWith(AndroidJUnit4.class)
+public class NodeLatencyVerifierTest {
+    private final String TAG = this.getClass().getName();
+
+    String[] nodeURLs = new String[]{
+            "wss://bitshares.openledger.info/ws",
+            "wss://us.nodes.bitshares.ws",
+            "wss://eu.nodes.bitshares.ws",
+            "wss://citadel.li/node",
+            "wss://api.bts.mobi/ws"
+    };
+
+    @Test
+    public void testNodeLatencyTest() throws Exception {
+        ArrayList<FullNode> nodeList = new ArrayList<>();
+        nodeList.add(new FullNode(nodeURLs[0]));
+        nodeList.add(new FullNode(nodeURLs[1]));
+        nodeList.add(new FullNode(nodeURLs[2]));
+        final NodeLatencyVerifier nodeLatencyVerifier = new NodeLatencyVerifier(nodeList);
+        PublishSubject subject = nodeLatencyVerifier.start();
+        final NodeProvider nodeProvider = new LatencyNodeProvider();
+        subject.subscribe(new Observer<FullNode>() {
+            int counter = 0;
+
+            @Override
+            public void onSubscribe(Disposable d) {}
+
+            @Override
+            public void onNext(FullNode fullNode) {
+                Log.i(TAG,String.format("Avg latency: %.2f, url: %s", fullNode.getLatencyValue(), fullNode.getUrl()));
+
+                // Updating node provider
+                nodeProvider.updateNode(fullNode);
+                List<FullNode> sortedNodes = nodeProvider.getSortedNodes();
+                for(FullNode node : sortedNodes){
+                    Log.d(TAG,String.format("> %.2f, url: %s", node.getLatencyValue(), node.getUrl()));
+                }
+
+                // Finish test after certain amount of rounds
+                if(counter > 3){
+                    synchronized (NodeLatencyVerifierTest.this){
+                        nodeLatencyVerifier.stop();
+                        NodeLatencyVerifierTest.this.notifyAll();
+                    }
+                }
+
+                counter++;
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                Log.e(TAG,"onError.Msg: "+e.getMessage());
+                synchronized (NodeLatencyVerifierTest.this){
+                    NodeLatencyVerifierTest.this.notifyAll();
+                }
+            }
+
+            @Override
+            public void onComplete() {
+                Log.d(TAG,"onComplete");
+            }
+        });
+        try {
+            synchronized(this) {
+                wait();
+            }
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+}

graphenej/src/main/AndroidManifest.xml

@@ -1,8 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="cy.agorise.graphenej"
+    package="cy.agorise.graphenej">
-          android:versionCode="9"
+
-          android:versionName="0.4.6" >
+    <uses-permission android:name="android.permission.INTERNET" />
-    <uses-sdk android:minSdkVersion="1" />
+
-    <application/>
+    <application>
+        <service
+            android:name=".api.android.NetworkService"
+            android:enabled="true"
+            android:exported="true"/>
+    </application>
+
 </manifest>

graphenej/src/main/java/cy/agorise/graphenej/AccountOptions.java

@@ -33,17 +33,51 @@ public class AccountOptions implements GrapheneSerializable {
     private Vote[] votes;
     private Extensions extensions;
 
+    /**
+     * Constructor used to instantiate only the following attributes:
+     * <ul>
+     *     <li>voting_account</li>
+     *     <li>votes</li>
+     *     <li>extensions</li>
+     * </ul>
+     */
     public AccountOptions(){
         voting_account = new UserAccount(UserAccount.PROXY_TO_SELF);
         this.votes = new Vote[0];
         this.extensions = new Extensions();
     }
 
+    /**
+     * Constructor used to instantiate only the following attributes:
+     * <ul>
+     *     <li>voting_account</li>
+     *     <li>votes</li>
+     *     <li>memo_key</li>
+     *     <li>extensions</li>
+     * </ul>
+     */
     public AccountOptions(PublicKey memoKey){
         this();
         this.memo_key = memoKey;
     }
 
+    /**
+     * Constructor that can be used to instantiate a version of the AccountOptions object
+     * with a null reference in the 'voting_account' attribute. This can be used to prevent
+     * a circular dependency situation when de-serializing the UserAccount instance.
+     *
+     * @param memoKey          Memo public key used by this account
+     * @param includeAccount   Whether or not to instantiate an UserAccount
+     */
+    public AccountOptions(PublicKey memoKey, boolean includeAccount){
+        if(includeAccount){
+            voting_account = new UserAccount(UserAccount.PROXY_TO_SELF);
+        }
+        this.memo_key = memoKey;
+        this.votes = new Vote[0];
+        this.extensions = new Extensions();
+    }
+
     //TODO: Implement constructor that takes a Vote array.
 
     public PublicKey getMemoKey() {
@@ -149,13 +183,23 @@ public class AccountOptions implements GrapheneSerializable {
      */
     public static class AccountOptionsDeserializer implements JsonDeserializer<AccountOptions> {
 
+        boolean mIncludeUserAccount;
+
+        public AccountOptionsDeserializer(){
+            this.mIncludeUserAccount = true;
+        }
+
+        public AccountOptionsDeserializer(boolean includeUserAccount){
+            this.mIncludeUserAccount = includeUserAccount;
+        }
+
         @Override
         public AccountOptions deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
             JsonObject baseObject = json.getAsJsonObject();
             AccountOptions options;
             try {
                 Address address = new Address(baseObject.get(KEY_MEMO_KEY).getAsString());
-                options = new AccountOptions(address.getPublicKey());
+                options = new AccountOptions(address.getPublicKey(), mIncludeUserAccount);
             } catch (MalformedAddressException e) {
                 System.out.println("MalformedAddressException. Msg: "+e.getMessage());
                 options = new AccountOptions();

graphenej/src/main/java/cy/agorise/graphenej/Address.java

@@ -1,5 +1,6 @@
 package cy.agorise.graphenej;
 
+import com.google.common.base.Objects;
 import com.google.common.primitives.Bytes;
 import cy.agorise.graphenej.errors.MalformedAddressException;
 import org.bitcoinj.core.Base58;
@@ -61,4 +62,18 @@ public class Address {
         ripemd160Digest.doFinal(checksum, 0);
         return Arrays.copyOfRange(checksum, 0, 4);
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Address address = (Address) o;
+        return Objects.equal(publicKey, address.publicKey) &&
+                Objects.equal(prefix, address.prefix);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(publicKey, prefix);
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/AssetAmount.java

@@ -191,6 +191,11 @@ public class AssetAmount implements ByteSerializable, JsonSerializable {
         return jsonAmount;
     }
 
+    @Override
+    public String toString() {
+        return String.format("(asset=%s, amount=%s)", asset.getObjectId(), amount.toString(10));
+    }
+
     /**
      * Custom serializer used to translate this object into the JSON-formatted entry we need for a transaction.
      */

graphenej/src/main/java/cy/agorise/graphenej/AuthorityType.java

@@ -9,5 +9,10 @@ package cy.agorise.graphenej;
 public enum AuthorityType {
     OWNER,
     ACTIVE,
-    MEMO
+    MEMO;
+
+    @Override
+    public String toString() {
+        return String.format("%d", this.ordinal());
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/BaseOperation.java

@@ -1,12 +1,19 @@
 package cy.agorise.graphenej;
 
 import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
 import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+
+import java.lang.reflect.Type;
+
 import cy.agorise.graphenej.interfaces.ByteSerializable;
 import cy.agorise.graphenej.interfaces.JsonSerializable;
+import cy.agorise.graphenej.operations.TransferOperation;
 
 /**
- * Created by nelson on 11/5/16.
+ * Base class that represents a generic operation
  */
 public abstract class BaseOperation implements ByteSerializable, JsonSerializable {
 
@@ -32,4 +39,54 @@ public abstract class BaseOperation implements ByteSerializable, JsonSerializabl
         array.add(this.getId());
         return array;
     }
+
+    /**
+     * <p>
+     * De-serializer used to unpack data from a generic operation. The general format used in the
+     * JSON-RPC blockchain API is the following:
+     * </p>
+     *
+     * <code>[OPERATION_ID, OPERATION_OBJECT]</code><br>
+     *
+     * <p>
+     * Where <code>OPERATION_ID</code> is one of the operations defined in {@link cy.agorise.graphenej.OperationType}
+     * and <code>OPERATION_OBJECT</code> is the actual operation serialized in the JSON format.
+     * </p>
+     * Here's an example of this serialized form for a transfer operation:<br><br>
+     *<pre>
+     *[
+     *   0,
+     *   {
+     *       "fee": {
+     *           "amount": 264174,
+     *           "asset_id": "1.3.0"
+     *       },
+     *       "from": "1.2.138632",
+     *       "to": "1.2.129848",
+     *       "amount": {
+     *           "amount": 100,
+     *           "asset_id": "1.3.0"
+     *       },
+     *       "extensions": []
+     *   }
+     *]
+     *</pre><br>
+     * If this class is used, this serialized data will be translated to a TransferOperation object instance.<br>
+     *
+     * TODO: Add support for operations other than the 'transfer'
+     */
+    public static class OperationDeserializer implements JsonDeserializer<BaseOperation> {
+
+        @Override
+        public BaseOperation deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            BaseOperation operation = null;
+            if(json.isJsonArray()){
+                JsonArray array = json.getAsJsonArray();
+                if(array.get(0).getAsLong() == OperationType.TRANSFER_OPERATION.ordinal()){
+                    operation = context.deserialize(array.get(1), TransferOperation.class);
+                }
+            }
+            return operation;
+        }
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/BrainKey.java

@@ -1,5 +1,7 @@
 package cy.agorise.graphenej;
 
+import android.annotation.SuppressLint;
+
 import org.bitcoinj.core.DumpedPrivateKey;
 import org.bitcoinj.core.ECKey;
 import org.bitcoinj.core.NetworkParameters;
@@ -69,7 +71,15 @@ public class BrainKey {
     public BrainKey(String words, int sequence) {
         this.mBrainKey = words;
         this.sequenceNumber = sequence;
-        String encoded = String.format("%s %d", words, sequence);
+        derivePrivateKey();
+    }
+
+    /**
+     * Generates the actual private key from the brainkey + sequence number
+     */
+    private void derivePrivateKey(){
+        @SuppressLint("DefaultLocale")
+        String encoded = String.format("%s %d", this.mBrainKey, this.sequenceNumber);
         try {
             MessageDigest md = MessageDigest.getInstance("SHA-512");
             byte[] bytes = md.digest(encoded.getBytes("UTF-8"));
@@ -120,19 +130,28 @@ public class BrainKey {
     }
 
     /**
-     * Brain key words getter
+     * Brain key words getter.
-     * @return: The word sequence that comprises this brain key
+     * @return      The word sequence that comprises this brain key
      */
     public String getBrainKey(){
         return mBrainKey;
     }
 
     /**
-     * Sequence number getter
+     * Sequence number getter.
-     * @return: The sequence number used alongside with the brain key words in order
+     * @return      The sequence number used alongside with the brain key words in order
      * to derive the private key
      */
     public int getSequenceNumber(){
         return sequenceNumber;
     }
+
+    /**
+     * Sequence number setter.
+     * @param sequenceNumber    The sequence number used to generate a specific key from this brainkey
+     */
+    public void setSequenceNumber(int sequenceNumber) {
+        this.sequenceNumber = sequenceNumber;
+        derivePrivateKey();
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/Extensions.java

@@ -1,12 +1,17 @@
 package cy.agorise.graphenej;
 
 import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
 import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+
 import cy.agorise.graphenej.interfaces.ByteSerializable;
 import cy.agorise.graphenej.interfaces.JsonSerializable;
 
-import java.util.ArrayList;
-
 /**
  * Created by nelson on 11/9/16.
  */
@@ -40,4 +45,15 @@ public class Extensions implements JsonSerializable, ByteSerializable {
     public int size(){
         return extensions.size();
     }
+
+    /**
+     * Custom de-serializer used to avoid problems when de-serializing an object that contains
+     * an extension array.
+     */
+    public static class ExtensionsDeserializer implements JsonDeserializer<Extensions> {
+        @Override
+        public Extensions deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            return null;
+        }
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/GrapheneObject.java

@@ -2,6 +2,8 @@ package cy.agorise.graphenej;
 
 import com.google.gson.annotations.Expose;
 
+import java.util.Locale;
+
 /**
  * <p>
  * Generic class used to represent a graphene object as defined in
@@ -34,15 +36,15 @@ public class GrapheneObject {
 
     /**
      *
-     * @return: A String containing the full object apiId in the form {space}.{type}.{instance}
+     * @return A String containing the full object apiId in the form {space}.{type}.{instance}
      */
     public String getObjectId(){
-        return String.format("%d.%d.%d", space, type, instance);
+        return String.format(Locale.US, "%d.%d.%d", space, type, instance);
     }
 
     /**
      * Returns the type of this object.
-     * @return: Instance of the ObjectType enum.
+     * @return Instance of the ObjectType enum.
      */
     public ObjectType getObjectType(){
         switch(space){
@@ -78,6 +80,8 @@ public class GrapheneObject {
                         return ObjectType.WORKER_OBJECT;
                     case 15:
                         return ObjectType.BALANCE_OBJECT;
+                    case 16:
+                        return ObjectType.HTLC_OBJECT;
                 }
             case IMPLEMENTATION_SPACE:
                 switch(type){

graphenej/src/main/java/cy/agorise/graphenej/Htlc.java

@@ -0,0 +1,43 @@
+package cy.agorise.graphenej;
+
+import com.google.gson.JsonElement;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+import cy.agorise.graphenej.interfaces.ByteSerializable;
+import cy.agorise.graphenej.interfaces.JsonSerializable;
+
+/**
+ * Class used to represent an existing HTLC contract.
+ */
+public class Htlc extends GrapheneObject implements ByteSerializable, JsonSerializable {
+
+    public Htlc(String id) {
+        super(id);
+    }
+
+    @Override
+    public byte[] toBytes() {
+        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+        DataOutput out = new DataOutputStream(byteArrayOutputStream);
+        try {
+            Varint.writeUnsignedVarLong(this.instance, out);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return byteArrayOutputStream.toByteArray();
+    }
+
+    @Override
+    public String toJsonString() {
+        return this.getObjectId();
+    }
+
+    @Override
+    public JsonElement toJsonObject() {
+        return null;
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/HtlcHash.java

@@ -0,0 +1,45 @@
+package cy.agorise.graphenej;
+
+import com.google.common.primitives.Bytes;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+
+import cy.agorise.graphenej.interfaces.ByteSerializable;
+import cy.agorise.graphenej.interfaces.JsonSerializable;
+
+/**
+ * Class used to represent a HTLC hash.
+ */
+public class HtlcHash implements ByteSerializable, JsonSerializable {
+    private HtlcHashType hashType;
+    private byte[] hash;
+
+    public HtlcHash(HtlcHashType hashType, byte[] hash) {
+        this.hashType = hashType;
+        this.hash = hash;
+    }
+
+    public HtlcHashType getType(){
+        return this.hashType;
+    }
+
+    @Override
+    public byte[] toBytes() {
+        byte[] hashTypeBytes = new byte[] { Util.revertInteger(hashType.ordinal())[3] };
+        return Bytes.concat(hashTypeBytes, hash);
+    }
+
+    @Override
+    public String toJsonString() {
+        JsonElement element = toJsonObject();
+        return element.toString();
+    }
+
+    @Override
+    public JsonElement toJsonObject() {
+        JsonArray array = new JsonArray();
+        array.add(hashType.ordinal());
+        array.add(Util.byteToString(hash));
+        return array;
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/HtlcHashType.java

@@ -0,0 +1,11 @@
+package cy.agorise.graphenej;
+
+/**
+ * Used to enumerate the possible hash algorithms used in HTLCs.
+ * @see <a href="https://github.com/bitshares/bitshares-core/blob/623aea265f2711adade982fc3248e6528dc8ac51/libraries/chain/include/graphene/chain/protocol/htlc.hpp">htlc.hpp</a>
+ */
+public enum HtlcHashType {
+    RIPEMD160,
+    SHA1,
+    SHA256
+}

graphenej/src/main/java/cy/agorise/graphenej/Memo.java

@@ -1,15 +1,11 @@
-package cy.agorise.graphenej.objects;
+package cy.agorise.graphenej;
 
 import com.google.common.primitives.Bytes;
-import com.google.gson.Gson;
+import com.google.gson.*;
-import com.google.gson.JsonDeserializationContext;
+import cy.agorise.graphenej.errors.ChecksumException;
-import com.google.gson.JsonDeserializer;
+import cy.agorise.graphenej.errors.MalformedAddressException;
-import com.google.gson.JsonElement;
+import cy.agorise.graphenej.interfaces.ByteSerializable;
-import com.google.gson.JsonObject;
+import cy.agorise.graphenej.interfaces.JsonSerializable;
-import com.google.gson.JsonParseException;
-import com.google.gson.JsonSerializationContext;
-import com.google.gson.JsonSerializer;
-
 import org.bitcoinj.core.ECKey;
 import org.spongycastle.math.ec.ECPoint;
 
@@ -19,20 +15,11 @@ import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
 
-import cy.agorise.graphenej.Address;
-import cy.agorise.graphenej.PublicKey;
-import cy.agorise.graphenej.Util;
-import cy.agorise.graphenej.errors.ChecksumException;
-import cy.agorise.graphenej.errors.MalformedAddressException;
-import cy.agorise.graphenej.interfaces.ByteSerializable;
-import cy.agorise.graphenej.interfaces.JsonSerializable;
-
 /**
  * Class used to represent a memo data structure
  * {@url https://bitshares.org/doxygen/structgraphene_1_1chain_1_1memo__data.html}
  */
 public class Memo implements ByteSerializable, JsonSerializable {
-    public final static String TAG = "Memo";
     public static final String KEY_FROM = "from";
     public static final String KEY_TO = "to";
     public static final String KEY_NONCE = "nonce";
@@ -190,10 +177,6 @@ public class Memo implements ByteSerializable, JsonSerializable {
 
             byte[] seed = Bytes.concat(nonceBytes, Util.hexlify(Util.bytesToHex(ss)));
 
-            // Calculating checksum
-            byte[] sha256Msg = sha256.digest(message);
-
-
             // Applying decryption
             byte[] temp = Util.decryptAES(message, seed);
             byte[] checksum = Arrays.copyOfRange(temp, 0, 4);
@@ -205,7 +188,7 @@ public class Memo implements ByteSerializable, JsonSerializable {
                 throw new ChecksumException("Invalid checksum found while performing decryption");
             }
         } catch (NoSuchAlgorithmException e) {
-            System.out.println("NoSuchAlgotithmException. Msg:"+ e.getMessage());
+            System.out.println("NoSuchAlgorithmException. Msg:"+ e.getMessage());
         }
         return plaintext;
     }
@@ -291,12 +274,14 @@ public class Memo implements ByteSerializable, JsonSerializable {
             memoObject.addProperty(KEY_FROM, "");
             memoObject.addProperty(KEY_TO, "");
             memoObject.addProperty(KEY_NONCE, "");
+            if(this.message != null)
                 memoObject.addProperty(KEY_MESSAGE, Util.bytesToHex(this.message));
             return null;
         }else{
             memoObject.addProperty(KEY_FROM, this.from.toString());
             memoObject.addProperty(KEY_TO, this.to.toString());
-            memoObject.addProperty(KEY_NONCE, String.format("%x", this.nonce));
+            memoObject.addProperty(KEY_NONCE, this.nonce.toString());
+            if(this.message != null)
                 memoObject.addProperty(KEY_MESSAGE, Util.bytesToHex(this.message));
         }
         return memoObject;
@@ -310,8 +295,9 @@ public class Memo implements ByteSerializable, JsonSerializable {
      */
     public JsonElement toJson(boolean decimal){
         JsonElement jsonElement = toJsonObject();
-        if(decimal){
+        if(decimal && jsonElement != null){
             JsonObject jsonObject = (JsonObject) jsonElement;
+            // The nonce is interpreted in base 16, but it is going to be written in base 10
             BigInteger nonce = new BigInteger(jsonObject.get(KEY_NONCE).getAsString(), 16);
             jsonObject.addProperty(KEY_NONCE, nonce.toString());
         }

graphenej/src/main/java/cy/agorise/graphenej/ObjectType.java

@@ -20,6 +20,7 @@ public enum ObjectType {
     VESTING_BALANCE_OBJECT,
     WORKER_OBJECT,
     BALANCE_OBJECT,
+    HTLC_OBJECT,
     GLOBAL_PROPERTY_OBJECT,
     DYNAMIC_GLOBAL_PROPERTY_OBJECT,
     ASSET_DYNAMIC_DATA,
@@ -53,6 +54,7 @@ public enum ObjectType {
             case VESTING_BALANCE_OBJECT:
             case WORKER_OBJECT:
             case BALANCE_OBJECT:
+            case HTLC_OBJECT:
                 space = 1;
                 break;
             case GLOBAL_PROPERTY_OBJECT:
@@ -123,6 +125,8 @@ public enum ObjectType {
             case BALANCE_OBJECT:
                 type = 15;
                 break;
+            case HTLC_OBJECT:
+                type = 16;
             case GLOBAL_PROPERTY_OBJECT:
                 type = 0;
                 break;

graphenej/src/main/java/cy/agorise/graphenej/OperationType.java

@@ -51,5 +51,15 @@ public enum OperationType {
     BLIND_TRANSFER_OPERATION,
     TRANSFER_FROM_BLIND_OPERATION,
     ASSET_SETTLE_CANCEL_OPERATION,  // VIRTUAL
-    ASSET_CLAIM_FEES_OPERATION
+    ASSET_CLAIM_FEES_OPERATION,
+    FBA_DISTRIBUTE_OPERATION,
+    BID_COLLATERAL_OPERATION,
+    EXECUTE_BID_OPERATION,          // VIRTUAL
+    ASSET_CLAIM_POOL_OPERATION,
+    ASSET_UPDATE_ISSUER_OPERATION,
+    HTLC_CREATE_OPERATION,
+    HTLC_REDEEM_OPERATION,
+    HTLC_REDEEMED_OPERATION,         // VIRTUAL
+    HTLC_EXTEND_OPERATION,
+    HTLC_REFUND_OPERATION // VIRTUAL
 }

graphenej/src/main/java/cy/agorise/graphenej/OrderBook.java

@@ -132,4 +132,8 @@ public class OrderBook {
         }
         return obtainedBase;
     }
+
+    public List<LimitOrder> getLimitOrders(){
+        return limitOrders;
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/Price.java

@@ -18,4 +18,13 @@ package cy.agorise.graphenej;
 public class Price {
     public AssetAmount base;
     public AssetAmount quote;
+
+    @Override
+    public String toString() {
+        return String.format("base:[%s, %s], quote:[%s, %s]",
+                base.getAsset().getObjectId(),
+                base.getAmount().toString(),
+                quote.getAsset().getObjectId(),
+                quote.getAmount().toString());
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/PublicKey.java

@@ -53,4 +53,9 @@ public class PublicKey implements ByteSerializable, Serializable {
         PublicKey other = (PublicKey) obj;
         return this.publicKey.equals(other.getKey());
     }
+
+    @Override
+    public String toString() {
+        return getAddress();
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/RPC.java

@@ -14,15 +14,19 @@ public class RPC {
     public static final String CALL_CANCEL_ALL_SUBSCRIPTIONS = "cancel_all_subscriptions";
     public static final String CALL_GET_ACCOUNT_BY_NAME = "get_account_by_name";
     public static final String CALL_GET_ACCOUNTS = "get_accounts";
+    public static final String CALL_GET_FULL_ACCOUNTS = "get_full_accounts";
     public static final String CALL_GET_DYNAMIC_GLOBAL_PROPERTIES = "get_dynamic_global_properties";
     public static final String CALL_BROADCAST_TRANSACTION = "broadcast_transaction";
     public static final String CALL_GET_REQUIRED_FEES = "get_required_fees";
     public static final String CALL_GET_KEY_REFERENCES = "get_key_references";
     public static final String CALL_GET_RELATIVE_ACCOUNT_HISTORY = "get_relative_account_history";
+    public static final String CALL_GET_ACCOUNT_HISTORY = "get_account_history";
+    public static final String CALL_GET_ACCOUNT_HISTORY_BY_OPERATIONS = "get_account_history_by_operations";
     public static final String CALL_LOOKUP_ACCOUNTS = "lookup_accounts";
     public static final String CALL_LIST_ASSETS = "list_assets";
-    public static final String GET_OBJECTS = "get_objects";
+    public static final String CALL_GET_ASSETS = "get_assets";
-    public static final String GET_ACCOUNT_BALANCES = "get_account_balances";
+    public static final String CALL_GET_OBJECTS = "get_objects";
+    public static final String CALL_GET_ACCOUNT_BALANCES = "get_account_balances";
     public static final String CALL_LOOKUP_ASSET_SYMBOLS = "lookup_asset_symbols";
     public static final String CALL_GET_BLOCK_HEADER = "get_block_header";
     public static final String CALL_GET_BLOCK = "get_block";
@@ -30,4 +34,5 @@ public class RPC {
     public static final String CALL_GET_TRADE_HISTORY = "get_trade_history";
     public static final String CALL_GET_MARKET_HISTORY = "get_market_history";
     public static final String CALL_GET_ALL_ASSET_HOLDERS = "get_all_asset_holders";
+    public static final String CALL_GET_TRANSACTION = "get_transaction";
 }

graphenej/src/main/java/cy/agorise/graphenej/Transaction.java

@@ -20,6 +20,7 @@ import java.lang.reflect.Type;
 import java.text.ParsePosition;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Date;
 import java.util.List;
 import java.util.TimeZone;
@@ -97,16 +98,25 @@ public class Transaction implements ByteSerializable, JsonSerializable {
     public Transaction(BlockData blockData, List<BaseOperation> operationList){
         this.blockData = blockData;
         this.operations = operationList;
+        this.extensions = new Extensions();
     }
 
     /**
-     * Updates the block data
+     * Block data getter
      * @param blockData New block data
      */
     public void setBlockData(BlockData blockData){
         this.blockData = blockData;
     }
 
+    /**
+     * Block data setter
+     * @return BlockData instance
+     */
+    public BlockData getBlockData(){
+        return this.blockData;
+    }
+
     /**
      * Updates the fees for all operations in this transaction.
      * @param fees: New fees to apply
@@ -229,7 +239,12 @@ public class Transaction implements ByteSerializable, JsonSerializable {
 
         // Getting the signature before anything else,
         // since this might change the transaction expiration data slightly
-        byte[] signature = getGrapheneSignature();
+        byte[] signature = null;
+        try{
+            signature = getGrapheneSignature();
+        }catch(Exception e){
+            System.out.println("Could not generate signature");
+        }
 
         // Formatting expiration time
         Date expirationTime = new Date(blockData.getExpiration() * 1000);
@@ -239,10 +254,12 @@ public class Transaction implements ByteSerializable, JsonSerializable {
         // Adding expiration
         obj.addProperty(KEY_EXPIRATION, dateFormat.format(expirationTime));
 
-        // Adding signatures
+        if(signature != null){
+            // Adding signature
             JsonArray signatureArray = new JsonArray();
             signatureArray.add(Util.bytesToHex(signature));
             obj.add(KEY_SIGNATURES, signatureArray);
+        }
 
         JsonArray operationsArray = new JsonArray();
         for(BaseOperation operation : operations){
@@ -259,7 +276,19 @@ public class Transaction implements ByteSerializable, JsonSerializable {
         obj.addProperty(KEY_REF_BLOCK_PREFIX, blockData.getRefBlockPrefix());
 
         return obj;
+    }
 
+    /**
+     * Method that will return a hash of this transaction's data. The hash covers only the transaction
+     * attributes and not the signature or the chain id.
+     *
+     * @return  A hash of the serialized transaction.
+     */
+    public byte[] getHash(){
+        byte[] txBytes = toBytes();
+        byte[] toHash = Arrays.copyOfRange(txBytes, 32, txBytes.length); //Tx data only, without chain id
+        Sha256Hash hash = Sha256Hash.wrap(Sha256Hash.hash(toHash));
+        return Arrays.copyOfRange(hash.getBytes(), 0, 20); // The hash is only the first 20 bytes
     }
 
     /**
@@ -291,7 +320,8 @@ public class Transaction implements ByteSerializable, JsonSerializable {
             SimpleDateFormat dateFormat = new SimpleDateFormat(Util.TIME_DATE_FORMAT);
             dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
             Date expirationDate = dateFormat.parse(expiration, new ParsePosition(0));
-            BlockData blockData = new BlockData(refBlockNum, refBlockPrefix, expirationDate.getTime());
+            long relativeExpiration = expirationDate.getTime() / 1000;
+            BlockData blockData = new BlockData(refBlockNum, refBlockPrefix, relativeExpiration);
 
             // Parsing operation list
             BaseOperation operation = null;
@@ -387,6 +417,26 @@ public class Transaction implements ByteSerializable, JsonSerializable {
                         //TODO: Add operation deserialization support
                     } else if (operationId == OperationType.ASSET_CLAIM_FEES_OPERATION.ordinal()) {
                         //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.FBA_DISTRIBUTE_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.BID_COLLATERAL_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.EXECUTE_BID_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.ASSET_CLAIM_POOL_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.ASSET_UPDATE_ISSUER_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.HTLC_CREATE_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.HTLC_REDEEM_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.HTLC_REDEEMED_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.HTLC_EXTEND_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
+                    } else if (operationId == OperationType.HTLC_REFUND_OPERATION.ordinal()) {
+                        //TODO: Add operation deserialization support
                     }
                     if (operation != null) operationList.add(operation);
                     operation = null;
@@ -401,4 +451,9 @@ public class Transaction implements ByteSerializable, JsonSerializable {
             return new Transaction(blockData, operationList);
         }
     }
+
+    @Override
+    public String toString() {
+        return this.toJsonString();
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/UserAccount.java

@@ -47,6 +47,7 @@ public class UserAccount extends GrapheneObject implements ByteSerializable, Jso
     public static final String KEY_OWNER_SPECIAL_AUTHORITY = "owner_special_authority";
     public static final String KEY_ACTIVE_SPECIAL_AUTHORITY = "active_special_authority";
     public static final String KEY_N_CONTROL_FLAGS = "top_n_control_flags";
+    public static final String LIFETIME_EXPIRATION_DATE = "1969-12-31T23:59:59";
 
     @Expose
     private String name;
@@ -84,6 +85,7 @@ public class UserAccount extends GrapheneObject implements ByteSerializable, Jso
     @Expose
     private long referrerRewardsPercentage;
 
+    private boolean isLifeTime;
 
 
     /**
@@ -248,6 +250,14 @@ public class UserAccount extends GrapheneObject implements ByteSerializable, Jso
         this.statistics = statistics;
     }
 
+    public boolean isLifeTime() {
+        return isLifeTime;
+    }
+
+    public void setLifeTime(boolean lifeTime) {
+        isLifeTime = lifeTime;
+    }
+
     /**
      * Deserializer used to build a UserAccount instance from the full JSON-formatted response obtained
      * by the 'get_objects' API call.
@@ -274,8 +284,10 @@ public class UserAccount extends GrapheneObject implements ByteSerializable, Jso
             // Handling the deserialization and assignation of the membership date, which internally
             // is stored as a long POSIX time value
             try{
-                Date date = dateFormat.parse(jsonAccount.get(KEY_MEMBERSHIP_EXPIRATION_DATE).getAsString());
+                String expirationDate = jsonAccount.get(KEY_MEMBERSHIP_EXPIRATION_DATE).getAsString();
+                Date date = dateFormat.parse(expirationDate);
                 userAccount.setMembershipExpirationDate(date.getTime());
+                userAccount.setLifeTime(expirationDate.equals(LIFETIME_EXPIRATION_DATE));
             } catch (ParseException e) {
                 System.out.println("ParseException. Msg: "+e.getMessage());
             }

graphenej/src/main/java/cy/agorise/graphenej/Util.java

@@ -5,6 +5,10 @@ import com.google.common.primitives.UnsignedLong;
 
 import org.spongycastle.crypto.DataLengthException;
 import org.spongycastle.crypto.InvalidCipherTextException;
+import org.spongycastle.crypto.digests.GeneralDigest;
+import org.spongycastle.crypto.digests.RIPEMD160Digest;
+import org.spongycastle.crypto.digests.SHA1Digest;
+import org.spongycastle.crypto.digests.SHA256Digest;
 import org.spongycastle.crypto.engines.AESFastEngine;
 import org.spongycastle.crypto.modes.CBCBlockCipher;
 import org.spongycastle.crypto.paddings.PaddedBufferedBlockCipher;
@@ -320,7 +324,9 @@ public class Util {
             }
             
             byte[] temp = new byte[count];
-            System.arraycopy(out, out.length - count, temp, 0, temp.length);
+            int srcPos = out.length - count > 0 ? out.length - count : 0;
+            int length = count < out.length ? count : out.length;
+            System.arraycopy(out, srcPos, temp, 0, length);
             byte[] temp2 = new byte[count];
             Arrays.fill(temp2, (byte) count);
             if (Arrays.equals(temp, temp2)) {
@@ -383,4 +389,36 @@ public class Util {
     public static long toBase(double value, int precision){
         return (long) (value * Math.pow(10, precision));
     }
+
+    /**
+     * Creates a hash for HTLC operations.
+     *
+     * @param preimage The data we want to operate on.
+     * @param hashType The type of hash.
+     * @return The hash.
+     * @throws NoSuchAlgorithmException
+     */
+    public static byte[] htlcHash(byte[] preimage, HtlcHashType hashType) throws NoSuchAlgorithmException {
+        byte[] out = null;
+        GeneralDigest digest = null;
+        switch(hashType){
+            case RIPEMD160:
+                digest = new RIPEMD160Digest();
+                out = new byte[20];
+                break;
+            case SHA1:
+                digest = new SHA1Digest();
+                out = new byte[20];
+                break;
+            case SHA256:
+                digest = new SHA256Digest();
+                out = new byte[32];
+                break;
+            default:
+                throw new IllegalArgumentException("Not supported hash function!");
+        }
+        digest.update(preimage, 0, preimage.length);
+        digest.doFinal(out, 0);
+        return out;
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/api/ApiAccess.java

@@ -0,0 +1,12 @@
+package cy.agorise.graphenej.api;
+
+/**
+ * Class used to list all currently supported API accesses
+ */
+
+public class ApiAccess {
+    public static final int API_NONE = 0x00;
+    public static final int API_DATABASE = 0x01;
+    public static final int API_HISTORY = 0x02;
+    public static final int API_NETWORK_BROADCAST = 0x04;
+}

graphenej/src/main/java/cy/agorise/graphenej/api/ConnectionStatusUpdate.java

@@ -0,0 +1,65 @@
+package cy.agorise.graphenej.api;
+
+/**
+ * Class used to send connection status updates.
+ *
+ * Connection status updates can be any of the following:
+ * - {@link ConnectionStatusUpdate#CONNECTED}
+ * - {@link ConnectionStatusUpdate#AUTHENTICATED}
+ * - {@link ConnectionStatusUpdate#API_UPDATE}
+ * - {@link ConnectionStatusUpdate#DISCONNECTED}
+ *
+ * This is specified by the field called {@link #updateCode}.
+ *
+ * If the updateCode is ConnectionStatusUpdate#API_UPDATE another extra field called
+ * {@link #api} is used to specify which api we're getting access to.
+ */
+
+public class ConnectionStatusUpdate {
+    // Constant used to announce that a connection has been established
+    public final static int CONNECTED = 0;
+    // Constant used to announce a successful authentication
+    public final static int AUTHENTICATED = 1;
+    // Constant used to announce an api update
+    public final static int API_UPDATE = 2;
+    // Constant used to announce a disconnection event
+    public final static int DISCONNECTED = 3;
+
+    /**
+     * The update code is the general purpose of the update message. Can be any of the following:
+     * - {@link ConnectionStatusUpdate#CONNECTED}
+     * - {@link ConnectionStatusUpdate#AUTHENTICATED}
+     * - {@link ConnectionStatusUpdate#API_UPDATE}
+     * - {@link ConnectionStatusUpdate#DISCONNECTED}
+     */
+    private int updateCode;
+
+    /**
+     * This field is used in case the updateCode is {@link ConnectionStatusUpdate#API_UPDATE} and
+     * it serves to specify which API we're getting access to.
+     *
+     * It can be any of the fields defined in {@link ApiAccess}
+     */
+    private int api;
+
+    public ConnectionStatusUpdate(int updateCode, int api){
+        this.updateCode = updateCode;
+        this.api = api;
+    }
+
+    public int getUpdateCode() {
+        return updateCode;
+    }
+
+    public void setUpdateCode(int updateCode) {
+        this.updateCode = updateCode;
+    }
+
+    public int getApi() {
+        return api;
+    }
+
+    public void setApi(int api) {
+        this.api = api;
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/GetAccountBalances.java

@@ -79,7 +79,7 @@ public class GetAccountBalances extends BaseGrapheneHandler {
         }
         params.add(mUserAccount.getObjectId());
         params.add(assetList);
-        ApiCall apiCall = new ApiCall(0, RPC.GET_ACCOUNT_BALANCES, params, RPC.VERSION, requestId);
+        ApiCall apiCall = new ApiCall(0, RPC.CALL_GET_ACCOUNT_BALANCES, params, RPC.VERSION, requestId);
         websocket.sendText(apiCall.toJsonString());
     }
 

graphenej/src/main/java/cy/agorise/graphenej/api/GetObjects.java

@@ -5,12 +5,10 @@ import com.google.gson.GsonBuilder;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonParser;
-import com.google.gson.reflect.TypeToken;
 import com.neovisionaries.ws.client.WebSocket;
 import com.neovisionaries.ws.client.WebSocketFrame;
 
 import java.io.Serializable;
-import java.lang.reflect.Type;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -24,7 +22,9 @@ import cy.agorise.graphenej.RPC;
 import cy.agorise.graphenej.UserAccount;
 import cy.agorise.graphenej.interfaces.WitnessResponseListener;
 import cy.agorise.graphenej.models.ApiCall;
+import cy.agorise.graphenej.models.AssetFeed;
 import cy.agorise.graphenej.models.BitAssetData;
+import cy.agorise.graphenej.models.ReportedAssetFeed;
 import cy.agorise.graphenej.models.WitnessResponse;
 
 /**
@@ -75,11 +75,9 @@ public class GetObjects extends BaseGrapheneHandler {
     public void onConnected(WebSocket websocket, Map<String, List<String>> headers) throws Exception {
         ArrayList<Serializable> params = new ArrayList<>();
         ArrayList<Serializable> subParams = new ArrayList<>();
-        for(String id : this.ids){
+        subParams.addAll(this.ids);
-            subParams.add(id);
-        }
         params.add(subParams);
-        ApiCall apiCall = new ApiCall(0, RPC.GET_OBJECTS, params, RPC.VERSION, 0);
+        ApiCall apiCall = new ApiCall(0, RPC.CALL_GET_OBJECTS, params, RPC.VERSION, 0);
         websocket.sendText(apiCall.toJsonString());
     }
 
@@ -91,6 +89,9 @@ public class GetObjects extends BaseGrapheneHandler {
         String response = frame.getPayloadText();
         GsonBuilder gsonBuilder = new GsonBuilder();
 
+        gsonBuilder.registerTypeAdapter(BitAssetData.class, new BitAssetData.BitAssetDataDeserializer());
+        gsonBuilder.registerTypeAdapter(AssetFeed.class, new AssetFeed.AssetFeedDeserializer());
+        gsonBuilder.registerTypeAdapter(ReportedAssetFeed.class, new ReportedAssetFeed.ReportedAssetFeedDeserializer());
         gsonBuilder.registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer());
         gsonBuilder.registerTypeAdapter(Asset.class, new Asset.AssetDeserializer());
         gsonBuilder.registerTypeAdapter(UserAccount.class, new UserAccount.UserAccountFullDeserializer());
@@ -102,7 +103,8 @@ public class GetObjects extends BaseGrapheneHandler {
 
         JsonParser parser = new JsonParser();
         JsonArray resultArray = parser.parse(response).getAsJsonObject().get(WitnessResponse.KEY_RESULT).getAsJsonArray();
-        for(JsonElement element : resultArray){
+        for(int i = 0; i < resultArray.size(); i++){
+            JsonElement element = resultArray.get(i);
             String id = element.getAsJsonObject().get(GrapheneObject.KEY_ID).getAsString();
             GrapheneObject grapheneObject = new GrapheneObject(id);
             switch (grapheneObject.getObjectType()){
@@ -115,10 +117,9 @@ public class GetObjects extends BaseGrapheneHandler {
                     parsedResult.add(account);
                     break;
                 case ASSET_BITASSET_DATA:
-                    Type BitAssetDataType = new TypeToken<WitnessResponse<List<BitAssetData>>>(){}.getType();
+                    BitAssetData bitAssetData = gson.fromJson(element, BitAssetData.class);
-                    WitnessResponse<List<BitAssetData>> witnessResponse = gsonBuilder.create().fromJson(response, BitAssetDataType);
-                    BitAssetData bitAssetData = witnessResponse.result.get(0);
                     parsedResult.add(bitAssetData);
+                    break;
             }
         }
 

graphenej/src/main/java/cy/agorise/graphenej/api/GetRelativeAccountHistory.java

@@ -18,9 +18,9 @@ import cy.agorise.graphenej.UserAccount;
 import cy.agorise.graphenej.interfaces.WitnessResponseListener;
 import cy.agorise.graphenej.models.ApiCall;
 import cy.agorise.graphenej.models.BaseResponse;
-import cy.agorise.graphenej.models.HistoricalTransfer;
+import cy.agorise.graphenej.models.OperationHistory;
 import cy.agorise.graphenej.models.WitnessResponse;
-import cy.agorise.graphenej.objects.Memo;
+import cy.agorise.graphenej.Memo;
 import cy.agorise.graphenej.operations.TransferOperation;
 
 /**
@@ -158,12 +158,13 @@ public class GetRelativeAccountHistory extends BaseGrapheneHandler {
 
                 sendRelativeAccountHistoryRequest();
             }else if(baseResponse.id >= GET_HISTORY_DATA){
-                Type RelativeAccountHistoryResponse = new TypeToken<WitnessResponse<List<HistoricalTransfer>>>(){}.getType();
+                Type RelativeAccountHistoryResponse = new TypeToken<WitnessResponse<List<OperationHistory>>>(){}.getType();
                 GsonBuilder gsonBuilder = new GsonBuilder();
+                gsonBuilder.registerTypeAdapter(OperationHistory.class, new OperationHistory.OperationHistoryDeserializer());
                 gsonBuilder.registerTypeAdapter(TransferOperation.class, new TransferOperation.TransferDeserializer());
                 gsonBuilder.registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer());
                 gsonBuilder.registerTypeAdapter(Memo.class, new Memo.MemoDeserializer());
-                WitnessResponse<List<HistoricalTransfer>> transfersResponse = gsonBuilder.create().fromJson(response, RelativeAccountHistoryResponse);
+                WitnessResponse<List<OperationHistory>> transfersResponse = gsonBuilder.create().fromJson(response, RelativeAccountHistoryResponse);
                 mListener.onSuccess(transfersResponse);
             }
         }

graphenej/src/main/java/cy/agorise/graphenej/api/SubscriptionMessagesHub.java

@@ -23,9 +23,10 @@ import cy.agorise.graphenej.interfaces.SubscriptionHub;
 import cy.agorise.graphenej.interfaces.SubscriptionListener;
 import cy.agorise.graphenej.models.ApiCall;
 import cy.agorise.graphenej.models.DynamicGlobalProperties;
+import cy.agorise.graphenej.models.OperationHistory;
 import cy.agorise.graphenej.models.SubscriptionResponse;
 import cy.agorise.graphenej.models.WitnessResponse;
-import cy.agorise.graphenej.objects.Memo;
+import cy.agorise.graphenej.Memo;
 import cy.agorise.graphenej.operations.CustomOperation;
 import cy.agorise.graphenej.operations.LimitOrderCreateOperation;
 import cy.agorise.graphenej.operations.TransferOperation;
@@ -61,6 +62,7 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
     private int subscriptionCounter = 0;
     private HashMap<Long, BaseGrapheneHandler> mHandlerMap = new HashMap<>();
     private List<BaseGrapheneHandler> pendingHandlerList = new ArrayList<>();
+    private boolean printLogs = true;
 
     // State variables
     private boolean isUnsubscribing;
@@ -95,6 +97,7 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
         builder.registerTypeAdapter(UserAccount.class, new UserAccount.UserAccountSimpleDeserializer());
         builder.registerTypeAdapter(DynamicGlobalProperties.class, new DynamicGlobalProperties.DynamicGlobalPropertiesDeserializer());
         builder.registerTypeAdapter(Memo.class, new Memo.MemoDeserializer());
+        builder.registerTypeAdapter(OperationHistory.class, new OperationHistory.OperationHistoryDeserializer());
         this.gson = builder.create();
     }
 
@@ -141,7 +144,7 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
     @Override
     public void onTextFrame(WebSocket websocket, WebSocketFrame frame) throws Exception {
         String message = frame.getPayloadText();
-        System.out.println("<< "+message);
+        if(printLogs) System.out.println("<< "+message);
         if(currentId == LOGIN_ID){
             currentId = GET_DATABASE_ID;
             ArrayList<Serializable> emptyParams = new ArrayList<>();
@@ -185,7 +188,7 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
                 }
 
                 payload.add(objects);
-                ApiCall subscribe = new ApiCall(databaseApiId, RPC.GET_OBJECTS, payload, RPC.VERSION, MANUAL_SUBSCRIPTION_ID);
+                ApiCall subscribe = new ApiCall(databaseApiId, RPC.CALL_GET_OBJECTS, payload, RPC.VERSION, MANUAL_SUBSCRIPTION_ID);
                 websocket.sendText(subscribe.toJsonString());
                 subscriptionCounter++;
             }else{
@@ -316,4 +319,12 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
             }
         }
     }
+
+    public void setPrintLogs(boolean printLogs){
+        this.printLogs = printLogs;
+    }
+
+    public boolean isPrintLogs(){
+        return this.printLogs;
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/api/android/DeserializationMap.java

@@ -0,0 +1,265 @@
+package cy.agorise.graphenej.api.android;
+
+import com.google.gson.ExclusionStrategy;
+import com.google.gson.FieldAttributes;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import java.util.HashMap;
+import java.util.List;
+
+import cy.agorise.graphenej.AccountOptions;
+import cy.agorise.graphenej.Asset;
+import cy.agorise.graphenej.AssetAmount;
+import cy.agorise.graphenej.AssetOptions;
+import cy.agorise.graphenej.Authority;
+import cy.agorise.graphenej.BaseOperation;
+import cy.agorise.graphenej.Extensions;
+import cy.agorise.graphenej.LimitOrder;
+import cy.agorise.graphenej.Memo;
+import cy.agorise.graphenej.Transaction;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.api.calls.GetAccountBalances;
+import cy.agorise.graphenej.api.calls.GetAccountByName;
+import cy.agorise.graphenej.api.calls.GetAccountHistoryByOperations;
+import cy.agorise.graphenej.api.calls.GetAccounts;
+import cy.agorise.graphenej.api.calls.GetAssets;
+import cy.agorise.graphenej.api.calls.GetBlock;
+import cy.agorise.graphenej.api.calls.GetBlockHeader;
+import cy.agorise.graphenej.api.calls.GetDynamicGlobalProperties;
+import cy.agorise.graphenej.api.calls.GetFullAccounts;
+import cy.agorise.graphenej.api.calls.GetKeyReferences;
+import cy.agorise.graphenej.api.calls.GetLimitOrders;
+import cy.agorise.graphenej.api.calls.GetMarketHistory;
+import cy.agorise.graphenej.api.calls.GetObjects;
+import cy.agorise.graphenej.api.calls.GetRelativeAccountHistory;
+import cy.agorise.graphenej.api.calls.GetRequiredFees;
+import cy.agorise.graphenej.api.calls.GetTransaction;
+import cy.agorise.graphenej.api.calls.ListAssets;
+import cy.agorise.graphenej.api.calls.LookupAssetSymbols;
+import cy.agorise.graphenej.models.AccountProperties;
+import cy.agorise.graphenej.models.AssetFeed;
+import cy.agorise.graphenej.models.BitAssetData;
+import cy.agorise.graphenej.models.Block;
+import cy.agorise.graphenej.models.BlockHeader;
+import cy.agorise.graphenej.models.BucketObject;
+import cy.agorise.graphenej.models.DynamicGlobalProperties;
+import cy.agorise.graphenej.models.FullAccountDetails;
+import cy.agorise.graphenej.models.HistoryOperationDetail;
+import cy.agorise.graphenej.models.OperationHistory;
+import cy.agorise.graphenej.models.ReportedAssetFeed;
+import cy.agorise.graphenej.operations.CustomOperation;
+import cy.agorise.graphenej.operations.LimitOrderCreateOperation;
+import cy.agorise.graphenej.operations.TransferOperation;
+
+/**
+ * Class used to store a mapping of request class to two important things:
+ *
+ * 1- The class to which the corresponding response should be de-serialized to
+ * 2- An instance of the Gson class, with all required type adapters
+ */
+public class DeserializationMap {
+    private final String TAG = this.getClass().getName();
+
+    private HashMap<Class, Class> mClassMap = new HashMap<>();
+
+    private HashMap<Class, Gson> mGsonMap = new HashMap<>();
+
+    DeserializationMap(){
+        Gson genericGson = new Gson();
+
+        // GetBlock
+        mClassMap.put(GetBlock.class, Block.class);
+        Gson getBlockGson = new GsonBuilder()
+                .registerTypeAdapter(Transaction.class, new Transaction.TransactionDeserializer())
+                .registerTypeAdapter(TransferOperation.class, new TransferOperation.TransferDeserializer())
+                .registerTypeAdapter(LimitOrderCreateOperation.class, new LimitOrderCreateOperation.LimitOrderCreateDeserializer())
+                .registerTypeAdapter(CustomOperation.class, new CustomOperation.CustomOperationDeserializer())
+                .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+                .create();
+        mGsonMap.put(GetBlock.class, getBlockGson);
+
+        // GetAccounts
+        mClassMap.put(GetAccounts.class, List.class);
+        Gson getAccountsGson = new GsonBuilder()
+                .registerTypeAdapter(Authority.class, new Authority.AuthorityDeserializer())
+                .registerTypeAdapter(AccountOptions.class, new AccountOptions.AccountOptionsDeserializer(false))
+                .create();
+        mGsonMap.put(GetAccounts.class, getAccountsGson);
+
+        // GetRequiredFees
+        mClassMap.put(GetRequiredFees.class, List.class);
+        Gson getRequiredFeesGson = new GsonBuilder()
+                .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+                .create();
+        mGsonMap.put(GetRequiredFees.class, getRequiredFeesGson);
+
+        // GetRelativeAccountHistory
+        mClassMap.put(GetRelativeAccountHistory.class, List.class);
+        Gson getRelativeAcountHistoryGson = new GsonBuilder()
+            .setExclusionStrategies(new SkipAccountOptionsStrategy(), new SkipAssetOptionsStrategy())
+                .registerTypeAdapter(BaseOperation.class, new BaseOperation.OperationDeserializer())
+            .registerTypeAdapter(OperationHistory.class, new OperationHistory.OperationHistoryDeserializer())
+            .registerTypeAdapter(TransferOperation.class, new TransferOperation.TransferDeserializer())
+            .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+            .registerTypeAdapter(Memo.class, new Memo.MemoDeserializer())
+            .create();
+        mGsonMap.put(GetRelativeAccountHistory.class, getRelativeAcountHistoryGson);
+
+        // GetBlockHeader
+        mClassMap.put(GetBlockHeader.class, BlockHeader.class);
+        mGsonMap.put(GetBlockHeader.class, genericGson);
+
+        // GetMarketHistory
+        mClassMap.put(GetMarketHistory.class, List.class);
+        Gson getMarketHistoryGson = new GsonBuilder()
+            .registerTypeAdapter(BucketObject.class, new BucketObject.BucketDeserializer())
+            .create();
+        mGsonMap.put(GetMarketHistory.class, getMarketHistoryGson);
+
+        // LookupAssetSymbols
+        mClassMap.put(LookupAssetSymbols.class, List.class);
+        Gson lookupAssetSymbolGson = new GsonBuilder()
+                .registerTypeAdapter(Asset.class, new Asset.AssetDeserializer())
+                .create();
+        mGsonMap.put(LookupAssetSymbols.class, lookupAssetSymbolGson);
+
+        // GetObjects
+        mClassMap.put(GetObjects.class, List.class);
+        Gson getObjectsGson = new GsonBuilder()
+                .registerTypeAdapter(Asset.class, new Asset.AssetDeserializer())
+                .registerTypeAdapter(BitAssetData.class, new BitAssetData.BitAssetDataDeserializer())
+                .registerTypeAdapter(ReportedAssetFeed.class, new ReportedAssetFeed.ReportedAssetFeedDeserializer())
+                .registerTypeAdapter(AssetFeed.class, new AssetFeed.AssetFeedDeserializer())
+                .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+                .create();
+        mGsonMap.put(GetObjects.class, getObjectsGson);
+
+        // ListAssets
+        mClassMap.put(ListAssets.class, List.class);
+        Gson listAssetsGson = new GsonBuilder()
+            .registerTypeAdapter(Asset.class, new Asset.AssetDeserializer())
+            .create();
+        mGsonMap.put(ListAssets.class, listAssetsGson);
+
+        // GetAccountByName
+        mClassMap.put(GetAccountByName.class, AccountProperties.class);
+        Gson getAccountByNameGson = new GsonBuilder()
+            .registerTypeAdapter(Authority.class, new Authority.AuthorityDeserializer())
+            .registerTypeAdapter(AccountOptions.class, new AccountOptions.AccountOptionsDeserializer())
+            .create();
+        mGsonMap.put(GetAccountByName.class, getAccountByNameGson);
+
+        // GetLimitOrders
+        mClassMap.put(GetLimitOrders.class, List.class);
+        Gson getLimitOrdersGson = new GsonBuilder()
+            .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+            .registerTypeAdapter(UserAccount.class, new UserAccount.UserAccountSimpleDeserializer())
+            .registerTypeAdapter(LimitOrder.class, new LimitOrder.LimitOrderDeserializer())
+            .create();
+        mGsonMap.put(GetLimitOrders.class, getLimitOrdersGson);
+
+        // GetAccountHistoryByOperations
+        mClassMap.put(GetAccountHistoryByOperations.class, HistoryOperationDetail.class);
+        Gson getAccountHistoryByOperationsGson = new GsonBuilder()
+                .setExclusionStrategies(new DeserializationMap.SkipAccountOptionsStrategy(), new DeserializationMap.SkipAssetOptionsStrategy())
+                .registerTypeAdapter(BaseOperation.class, new BaseOperation.OperationDeserializer())
+                .registerTypeAdapter(OperationHistory.class, new OperationHistory.OperationHistoryDeserializer())
+                .registerTypeAdapter(Extensions.class, new Extensions.ExtensionsDeserializer())
+                .registerTypeAdapter(Memo.class, new Memo.MemoDeserializer())
+                .registerTypeAdapter(UserAccount.class, new UserAccount.UserAccountSimpleDeserializer())
+                .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+                .create();
+        mGsonMap.put(GetAccountHistoryByOperations.class, getAccountHistoryByOperationsGson);
+
+        // GetFullAccounts
+        mClassMap.put(GetFullAccounts.class, List.class);
+        Gson getFullAccountsGson = new GsonBuilder()
+                .registerTypeAdapter(FullAccountDetails.class, new FullAccountDetails.FullAccountDeserializer())
+                .registerTypeAdapter(Authority.class, new Authority.AuthorityDeserializer())
+                .registerTypeAdapter(Memo.class, new Memo.MemoDeserializer())
+                .registerTypeAdapter(AccountOptions.class, new AccountOptions.AccountOptionsDeserializer())
+                .create();
+        mGsonMap.put(GetFullAccounts.class, getFullAccountsGson);
+
+        // GetDynamicGlobalProperties
+        mClassMap.put(GetDynamicGlobalProperties.class, DynamicGlobalProperties.class);
+        Gson getDynamicGlobalPropertiesGson = new GsonBuilder()
+                .registerTypeAdapter(DynamicGlobalProperties.class, new DynamicGlobalProperties.DynamicGlobalPropertiesDeserializer())
+                .create();
+        mGsonMap.put(GetDynamicGlobalProperties.class, getDynamicGlobalPropertiesGson);
+
+        // GetKeyReferences
+        mClassMap.put(GetKeyReferences.class, List.class);
+        Gson getKeyReferencesGson = new GsonBuilder()
+                .registerTypeAdapter(UserAccount.class, new UserAccount.UserAccountSimpleDeserializer())
+                .create();
+        mGsonMap.put(GetKeyReferences.class, getKeyReferencesGson);
+
+        // GetAccountBalances
+        mClassMap.put(GetAccountBalances.class, List.class);
+        Gson getAccountBalancesGson = new GsonBuilder()
+                .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+                .create();
+        mGsonMap.put(GetAccountBalances.class, getAccountBalancesGson);
+
+        // GetAssets
+        mClassMap.put(GetAssets.class, List.class);
+        Gson getAssetsGson = new GsonBuilder()
+                .registerTypeAdapter(Asset.class, new Asset.AssetDeserializer())
+                .create();
+        mGsonMap.put(GetAssets.class, getAssetsGson);
+
+        // GetTransaction
+        mClassMap.put(GetTransaction.class, Transaction.class);
+        Gson getTransactionGson = new GsonBuilder()
+                .registerTypeAdapter(Transaction.class, new Transaction.TransactionDeserializer())
+                .registerTypeAdapter(Memo.class, new Memo.MemoDeserializer())
+                .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+                .registerTypeAdapter(TransferOperation.class, new TransferOperation.TransferDeserializer())
+                .create();
+        mGsonMap.put(GetTransaction.class, getTransactionGson);
+    }
+
+    public Class getReceivedClass(Class _class){
+        return mClassMap.get(_class);
+    }
+
+    public Gson getGson(Class aClass) {
+        return mGsonMap.get(aClass);
+    }
+
+    /**
+     * This class is required in order to break a recursion loop when de-serializing the
+     * AccountProperties class instance.
+     */
+    public static class SkipAccountOptionsStrategy implements ExclusionStrategy {
+
+        @Override
+        public boolean shouldSkipField(FieldAttributes f) {
+            return false;
+        }
+
+        @Override
+        public boolean shouldSkipClass(Class<?> clazz) {
+            return clazz == AccountOptions.class;
+        }
+    }
+
+    /**
+     * This class is required in order to break a recursion loop when de-serializing the
+     * AssetAmount instance.
+     */
+    public static class SkipAssetOptionsStrategy implements ExclusionStrategy {
+
+        @Override
+        public boolean shouldSkipField(FieldAttributes f) {
+            return false;
+        }
+
+        @Override
+        public boolean shouldSkipClass(Class<?> clazz) {
+            return clazz == AssetOptions.class;
+        }
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/android/NetworkService.java

@@ -0,0 +1,795 @@
+package cy.agorise.graphenej.api.android;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.Binder;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Looper;
+import android.util.Log;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+
+import java.io.Serializable;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.MissingResourceException;
+import java.util.concurrent.TimeUnit;
+
+import cy.agorise.graphenej.Asset;
+import cy.agorise.graphenej.AssetAmount;
+import cy.agorise.graphenej.BaseOperation;
+import cy.agorise.graphenej.LimitOrder;
+import cy.agorise.graphenej.Memo;
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.Transaction;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.api.ConnectionStatusUpdate;
+import cy.agorise.graphenej.api.calls.ApiCallable;
+import cy.agorise.graphenej.api.calls.GetAccountBalances;
+import cy.agorise.graphenej.api.calls.GetAccounts;
+import cy.agorise.graphenej.api.calls.GetAssets;
+import cy.agorise.graphenej.api.calls.GetFullAccounts;
+import cy.agorise.graphenej.api.calls.GetKeyReferences;
+import cy.agorise.graphenej.api.calls.GetLimitOrders;
+import cy.agorise.graphenej.api.calls.GetMarketHistory;
+import cy.agorise.graphenej.api.calls.GetObjects;
+import cy.agorise.graphenej.api.calls.GetRelativeAccountHistory;
+import cy.agorise.graphenej.api.calls.GetRequiredFees;
+import cy.agorise.graphenej.api.calls.ListAssets;
+import cy.agorise.graphenej.models.AccountProperties;
+import cy.agorise.graphenej.models.ApiCall;
+import cy.agorise.graphenej.models.BitAssetData;
+import cy.agorise.graphenej.models.Block;
+import cy.agorise.graphenej.models.BlockHeader;
+import cy.agorise.graphenej.models.BucketObject;
+import cy.agorise.graphenej.models.DynamicGlobalProperties;
+import cy.agorise.graphenej.models.FullAccountDetails;
+import cy.agorise.graphenej.models.HistoryOperationDetail;
+import cy.agorise.graphenej.models.JsonRpcNotification;
+import cy.agorise.graphenej.models.JsonRpcResponse;
+import cy.agorise.graphenej.models.OperationHistory;
+import cy.agorise.graphenej.network.FullNode;
+import cy.agorise.graphenej.network.LatencyNodeProvider;
+import cy.agorise.graphenej.network.NodeLatencyVerifier;
+import cy.agorise.graphenej.network.NodeProvider;
+import cy.agorise.graphenej.operations.CustomOperation;
+import cy.agorise.graphenej.operations.LimitOrderCreateOperation;
+import cy.agorise.graphenej.operations.TransferOperation;
+import cy.agorise.graphenej.stats.ExponentialMovingAverage;
+import io.reactivex.Observer;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.annotations.Nullable;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.subjects.PublishSubject;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+import okhttp3.WebSocket;
+import okhttp3.WebSocketListener;
+
+/**
+ * Service in charge of maintaining a connection to the full node.
+ */
+
+public class NetworkService extends Service {
+    private final String TAG = this.getClass().getName();
+
+    public static final int NORMAL_CLOSURE_STATUS = 1000;
+    private static final int GOING_AWAY_STATUS = 1001;
+
+    // Time to wait before retrying a connection attempt
+    private static final int DEFAULT_RETRY_DELAY = 500;
+
+    // Default connection delay when using the node latency verification strategy. This initial
+    // delay is required in order ot make sure we have a fair selection of node latencies from
+    // which we can choose from.
+    private final int DEFAULT_INITIAL_DELAY = 500;
+
+    /**
+     * Constant to be used as a key in order to pass the user name information, in case the
+     * provided API nodes might require this information.
+     */
+    public static final String KEY_USERNAME = "key_username";
+
+    /**
+     * Constant to be used as a key in order to pass the password information, in case the
+     * provided API nodes might require this information.
+     * <p>
+     * This information should be passed as an intent extra when calling the bindService
+     * or startService methods.
+     */
+    public static final String KEY_PASSWORD = "key_password";
+
+    /**
+     * Constant used as a key in order to specify which APIs the application will be requiring.
+     * <p>
+     * This information should be passed as an intent extra when calling the bindService
+     * or startService methods.
+     */
+    public static final String KEY_REQUESTED_APIS = "key_requested_apis";
+
+    /**
+     * Constant used as a key in order to let the NetworkService know whether or not it should
+     * start a recurring node latency verification task.
+     * <p>
+     * This information should be passed as an intent extra when calling the bindService
+     * or startService methods.
+     */
+    public static final String KEY_ENABLE_LATENCY_VERIFIER = "key_enable_latency_verifier";
+
+    /**
+     * Constant used as a key in order to specify the alpha (or smoothing) factor to be used in
+     * the exponential moving average calculated from the different latency samples. This only
+     * makes sense if the latency verification feature is enabled of course.
+     * <p>
+     * This information should be passed as an intent extra when calling the bindService
+     * or startService methods.
+     */
+    public static final String KEY_NODE_LATENCY_SMOOTHING_FACTOR = "key_node_latency_smoothing_factor";
+
+    /**
+     * Key used to pass via intent a boolean extra to specify whether the connection should
+     * be automatically established.
+     * <p>
+     * This information should be passed as an intent extra when calling the bindService
+     * or startService methods.
+     */
+    public static final String KEY_AUTO_CONNECT = "key_auto_connect";
+
+    /**
+     * Key used to pass via intent a list of node URLs. The value passed should be a String
+     * containing a simple comma separated list of URLs.
+     * <p>
+     * For example:
+     *
+     *      wss://domain1.com/ws,wss://domain2.com/ws,wss://domain3.com/ws
+     * <p>
+     * This information should be passed as an intent extra when calling the bindService
+     * or startService methods.
+     */
+    public static final String KEY_NODE_URLS = "key_node_urls";
+
+    private final IBinder mBinder = new LocalBinder();
+
+    private WebSocket mWebSocket;
+
+    // Username and password used to connect to a specific node
+    private String mUsername;
+    private String mPassword;
+
+    private boolean isLoggedIn = false;
+
+    private String mLastCall;
+    private long mCurrentId = 0;
+
+    // Requested APIs passed to this service
+    private int mRequestedApis;
+
+    // Variable used to keep track of the currently obtained API accesses
+    private HashMap<Integer, Integer> mApiIds = new HashMap<Integer, Integer>();
+
+    // Variable used as a source of node information
+    private NodeProvider nodeProvider = new LatencyNodeProvider();
+
+    // Class used to obtain frequent node latency updates
+    private NodeLatencyVerifier nodeLatencyVerifier;
+
+    // PublishSubject used to announce full node latencies updates
+    private PublishSubject<FullNode> fullNodePublishSubject;
+
+    // Counter used to trigger the connection only after we've received enough node latency updates
+    private long latencyUpdateCounter;
+
+    // Property used to keep track of the currently active node
+    private FullNode mSelectedNode;
+
+    private Handler mHandler = new Handler(Looper.getMainLooper());
+
+    private Gson gson = new GsonBuilder()
+            .registerTypeAdapter(Transaction.class, new Transaction.TransactionDeserializer())
+            .registerTypeAdapter(TransferOperation.class, new TransferOperation.TransferDeserializer())
+            .registerTypeAdapter(LimitOrderCreateOperation.class, new LimitOrderCreateOperation.LimitOrderCreateDeserializer())
+            .registerTypeAdapter(CustomOperation.class, new CustomOperation.CustomOperationDeserializer())
+            .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+            .registerTypeAdapter(UserAccount.class, new UserAccount.UserAccountSimpleDeserializer())
+            .registerTypeAdapter(DynamicGlobalProperties.class, new DynamicGlobalProperties.DynamicGlobalPropertiesDeserializer())
+            .registerTypeAdapter(Memo.class, new Memo.MemoDeserializer())
+            .registerTypeAdapter(BaseOperation.class, new BaseOperation.OperationDeserializer())
+            .registerTypeAdapter(OperationHistory.class, new OperationHistory.OperationHistoryDeserializer())
+            .registerTypeAdapter(JsonRpcNotification.class, new JsonRpcNotification.JsonRpcNotificationDeserializer())
+            .create();
+
+    // Map used to keep track of outgoing request ids and its request types. This is just
+    // one of two required mappings. The second one is implemented by the DeserializationMap
+    // class.
+    private HashMap<Long, Class> mRequestClassMap = new HashMap<>();
+
+    // This class is used to keep track of the mapping between request classes and response
+    // payload classes. It also provides a handy method that returns a Gson deserializer instance
+    // suited for every response type.
+    private DeserializationMap mDeserializationMap = new DeserializationMap();
+
+    /**
+     * Actually establishes a connection from this Service to one of the full nodes.
+     */
+    public void connect(){
+        OkHttpClient client = new OkHttpClient
+                .Builder()
+                .connectTimeout(2, TimeUnit.SECONDS)
+                .readTimeout(5, TimeUnit.SECONDS)
+                .writeTimeout(5, TimeUnit.SECONDS)
+                .build();
+
+        synchronized (mWebSocketListener){
+            mSelectedNode = nodeProvider.getBestNode();
+            if(mSelectedNode != null){
+                Log.d(TAG,"Trying to connect to: "+ mSelectedNode.getUrl());
+                Request request = new Request.Builder().url(mSelectedNode.getUrl()).build();
+                mWebSocket = client.newWebSocket(request, mWebSocketListener);
+            }else{
+                Log.d(TAG,"Could not find best node, reescheduling");
+                // If no node could be found yet, schedule a new attempt in DEFAULT_INITIAL_DELAY ms
+                mHandler.postDelayed(mConnectAttempt, DEFAULT_INITIAL_DELAY);
+            }
+        }
+    }
+
+    public long sendMessage(String message){
+        if(mWebSocket != null){
+            if(mWebSocket.send(message)){
+                Log.v(TAG,"-> " + message);
+                return mCurrentId;
+            }
+        }else{
+            throw new RuntimeException("Websocket connection has not yet been established");
+        }
+        return -1;
+    }
+
+    /**
+     * Method that will send a message to the full node, and takes as an argument one of the
+     * API call wrapper classes. This is the preferred method of sending blockchain API calls.
+     *
+     * @param apiCallable   The object that will get serialized into a request
+     * @param requiredApi   The required APIs for this specific request. Should be one of the
+     *                      constants specified in the ApiAccess class.
+     * @return              The id of the message that was just sent, or -1 if no message was sent.
+     */
+    public synchronized long sendMessage(ApiCallable apiCallable, int requiredApi){
+        if(requiredApi != -1 && mApiIds.containsKey(requiredApi) || requiredApi == ApiAccess.API_NONE){
+            int apiId = 0;
+            if(requiredApi != ApiAccess.API_NONE)
+                apiId = mApiIds.get(requiredApi);
+            ApiCall call = apiCallable.toApiCall(apiId, ++mCurrentId);
+            mRequestClassMap.put(mCurrentId, apiCallable.getClass());
+            if(mWebSocket != null && mWebSocket.send(call.toJsonString())){
+                Log.v(TAG,"-> "+call.toJsonString());
+                return mCurrentId;
+            }
+        }
+        return -1;
+    }
+
+    /**
+     * Method used to inform any external party a clue about the current connectivity status
+     * @return  True if the service is currently connected and logged in, false otherwise.
+     */
+    public boolean isConnected(){
+        return mWebSocket != null && isLoggedIn;
+    }
+
+    @Override
+    public void onDestroy() {
+        if(mWebSocket != null)
+            mWebSocket.close(NORMAL_CLOSURE_STATUS, null);
+
+        if(nodeLatencyVerifier != null)
+            nodeLatencyVerifier.stop();
+    }
+
+    @Nullable
+    @Override
+    public IBinder onBind(Intent intent) {
+        return mBinder;
+    }
+
+    /**
+     * Initialize information and try to connect to a node accordingly. This methods were moved
+     * from onBind to avoid crashes due to components other than {@link NetworkServiceManager}
+     * binding to the service without submitting the proper information.
+     *
+     * @param extras    Bundle that contains all required information for a proper initialization
+     */
+    public void bootstrapService(Bundle extras) {
+        // Retrieving credentials and requested API data from the shared preferences
+        mUsername = extras.getString(NetworkService.KEY_USERNAME, "");
+        mPassword = extras.getString(NetworkService.KEY_PASSWORD, "");
+        mRequestedApis = extras.getInt(NetworkService.KEY_REQUESTED_APIS, 0);
+        boolean mAutoConnect = extras.getBoolean(NetworkService.KEY_AUTO_CONNECT, true);
+        boolean verifyNodeLatency = extras.getBoolean(NetworkService.KEY_ENABLE_LATENCY_VERIFIER, false);
+
+        // If the user of the library desires, a custom list of node URLs can
+        // be passed using the KEY_NODE_URLS constant
+        String nodeURLStr = extras.getString(NetworkService.KEY_NODE_URLS, "");
+        if(nodeURLStr.equals("")){
+            throw new MissingResourceException("A comma-separated list of node URLs must be provided as an intent extra", String.class.getName(), NetworkService.KEY_NODE_URLS);
+        }
+
+        // Adding user-provided list of node URLs
+        String[] urls = nodeURLStr.split(",");
+
+        // Feeding all node information to the NodeProvider instance
+        for(String nodeUrl : urls){
+            nodeProvider.addNode(new FullNode(nodeUrl));
+        }
+
+        if (!mAutoConnect && !verifyNodeLatency) {
+            throw new IllegalArgumentException("NetworkService$bootstrapService: verifyNodeLatency cannot be false when autoConnect is false too.");
+        }
+
+        if (verifyNodeLatency) {
+            double alpha = extras.getDouble(KEY_NODE_LATENCY_SMOOTHING_FACTOR, ExponentialMovingAverage.DEFAULT_ALPHA);
+            ArrayList<FullNode> fullNodes = new ArrayList<>();
+            for(String url : urls){
+                fullNodes.add(new FullNode(url, alpha));
+            }
+            nodeLatencyVerifier = new NodeLatencyVerifier(fullNodes);
+            fullNodePublishSubject = nodeLatencyVerifier.start();
+            fullNodePublishSubject.observeOn(AndroidSchedulers.mainThread()).subscribe(nodeLatencyObserver);
+        }
+
+        if (mAutoConnect)
+            connect();
+        else
+            mHandler.postDelayed(mConnectAttempt, DEFAULT_INITIAL_DELAY);
+
+        // TODO make sure (verifyNodeLatency==false && mAutoConnect==true) is a valid/useful combination, else simplify and use only one of those arguments
+    }
+
+    /**
+     * Used to close the current connection and cause the service to attempt a reconnection.
+     */
+    public void reconnectNode() {
+        mWebSocket.close(GOING_AWAY_STATUS, null);
+    }
+
+    /**
+     * Runnable that will perform a connection attempt with the best node after DEFAULT_INITIAL_DELAY
+     * milliseconds. This is used only if the node latency verification is activated.
+     *
+     * The reason to delay the initial connection is that we want to ideally connect to the best node,
+     * meaning the one that offers the lowest latency value. But we have to give some time for the
+     * first node latency measurement round to finish in order to have at least a partial result set
+     * that could be used.
+     */
+    private Runnable mConnectAttempt = new Runnable() {
+        @Override
+        public void run() {
+            FullNode fullNode = nodeProvider.getBestNode();
+            if(fullNode != null){
+                Log.i(TAG, String.format("Connected with %d latency results", latencyUpdateCounter));
+                connect();
+            }else{
+                mHandler.postDelayed(this, DEFAULT_INITIAL_DELAY);
+            }
+        }
+    };
+
+    /**
+     * Observer used to be notified about node latency measurement updates.
+     */
+    private Observer<FullNode> nodeLatencyObserver = new Observer<FullNode>() {
+        @Override
+        public void onSubscribe(Disposable d) { }
+
+        @Override
+        public void onNext(FullNode fullNode) {
+            latencyUpdateCounter++;
+            // Updating the node with the new latency measurement
+            nodeProvider.updateNode(fullNode);
+        }
+
+        @Override
+        public void onError(Throwable e) {
+            Log.e(TAG,"nodeLatencyObserver.onError.Msg: "+e.getMessage());
+        }
+
+        @Override
+        public void onComplete() { }
+    };
+
+    /**
+     * Class used for the client Binder.  Because we know this service always
+     * runs in the same process as its clients, we don't need to deal with IPC.
+     */
+    public class LocalBinder extends Binder {
+        public NetworkService getService() {
+            // Return this instance of LocalService so clients can call public methods
+            return NetworkService.this;
+        }
+    }
+
+    private WebSocketListener mWebSocketListener = new WebSocketListener() {
+
+        @Override
+        public synchronized void onOpen(WebSocket webSocket, Response response) {
+            super.onOpen(webSocket, response);
+
+            // Marking the selected node as connected
+            mSelectedNode.setConnected(true);
+
+            // Updating the selected node's 'connected' status on the NodeLatencyVerifier instance
+            if(nodeLatencyVerifier != null)
+                nodeLatencyVerifier.updateActiveNodeInformation(mSelectedNode);
+
+            // Notifying all listeners about the new connection status
+            RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.CONNECTED, ApiAccess.API_NONE));
+
+            // If we're not yet logged in, we should do it now
+            if(!isLoggedIn){
+                ArrayList<Serializable> loginParams = new ArrayList<>();
+                loginParams.add(mUsername);
+                loginParams.add(mPassword);
+                ApiCall loginCall = new ApiCall(1, RPC.CALL_LOGIN, loginParams, RPC.VERSION, ++mCurrentId);
+                mLastCall = RPC.CALL_LOGIN;
+                sendMessage(loginCall.toJsonString());
+            }
+        }
+
+        @Override
+        public synchronized void onMessage(WebSocket webSocket, String text) {
+            super.onMessage(webSocket, text);
+            Log.v(TAG,"<- "+text);
+            JsonRpcNotification notification = gson.fromJson(text, JsonRpcNotification.class);
+
+            if(notification.method != null){
+                // If we are dealing with a notification
+                handleJsonRpcNotification(notification);
+            }else{
+                // If we are dealing with a response
+                JsonRpcResponse<?> response = gson.fromJson(text, JsonRpcResponse.class);
+                if(response.result != null){
+                    // Handling initial handshake with the full node (authentication and API access checks)
+                    if(response.result instanceof Double || response.result instanceof Boolean){
+                        switch (mLastCall) {
+                            case RPC.CALL_LOGIN:
+                                isLoggedIn = true;
+
+                                // Broadcasting result
+                                RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.AUTHENTICATED, ApiAccess.API_NONE));
+
+                                checkNextRequestedApiAccess();
+                                break;
+                            case RPC.CALL_DATABASE: {
+                                // Deserializing integer response
+                                Type IntegerJsonResponse = new TypeToken<JsonRpcResponse<Integer>>() {}.getType();
+                                JsonRpcResponse<Integer> apiIdResponse = gson.fromJson(text, IntegerJsonResponse);
+
+                                // Storing the "database" api id
+                                mApiIds.put(ApiAccess.API_DATABASE, apiIdResponse.result);
+
+                                // Broadcasting result
+                                RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.API_UPDATE, ApiAccess.API_DATABASE));
+
+                                checkNextRequestedApiAccess();
+                                break;
+                            }
+                            case RPC.CALL_HISTORY: {
+                                // Deserializing integer response
+                                Type IntegerJsonResponse = new TypeToken<JsonRpcResponse<Integer>>() {}.getType();
+                                JsonRpcResponse<Integer> apiIdResponse = gson.fromJson(text, IntegerJsonResponse);
+
+                                // Broadcasting result
+                                RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.API_UPDATE, ApiAccess.API_HISTORY));
+
+                                // Storing the "history" api id
+                                mApiIds.put(ApiAccess.API_HISTORY, apiIdResponse.result);
+
+                                checkNextRequestedApiAccess();
+                                break;
+                            }
+                            case RPC.CALL_NETWORK_BROADCAST:
+                                // Deserializing integer response
+                                Type IntegerJsonResponse = new TypeToken<JsonRpcResponse<Integer>>() {}.getType();
+                                JsonRpcResponse<Integer> apiIdResponse = gson.fromJson(text, IntegerJsonResponse);
+
+                                // Broadcasting result
+                                RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.API_UPDATE, ApiAccess.API_NETWORK_BROADCAST));
+
+                                // Storing the "network_broadcast" api access
+                                mApiIds.put(ApiAccess.API_NETWORK_BROADCAST, apiIdResponse.result);
+
+                                // All calls have been handled at this point
+                                mLastCall = "";
+                                break;
+                        }
+                    }
+                }
+                if(response.error != null && response.error.message != null){
+                    // We could not make sense of this incoming message, just log a warning
+                    Log.w(TAG,"Error.Msg: "+response.error.message);
+                }
+                // Properly de-serialize all other fields and broadcasts to the event bus
+                handleJsonRpcResponse(response, text);
+            }
+        }
+
+        /**
+         * Private method that will de-serialize all fields of every kind of JSON-RPC response
+         * and broadcast it to the event bus.
+         *
+         * @param response  De-serialized response
+         * @param text      Raw text, as received
+         */
+        private void handleJsonRpcResponse(JsonRpcResponse response, String text){
+            JsonRpcResponse parsedResponse = null;
+            Class requestClass = mRequestClassMap.get(response.id);
+            if(requestClass != null){
+                // Removing the class entry in the map
+                mRequestClassMap.remove(response.id);
+
+                // Obtaining the response payload class
+                Class responsePayloadClass = mDeserializationMap.getReceivedClass(requestClass);
+                Gson gson = mDeserializationMap.getGson(requestClass);
+                if(responsePayloadClass == Block.class){
+                    // If the response payload is a Block instance, we proceed to de-serialize it
+                    Type GetBlockResponse = new TypeToken<JsonRpcResponse<Block>>() {}.getType();
+                    parsedResponse = gson.fromJson(text, GetBlockResponse);
+                }else if(responsePayloadClass == BlockHeader.class){
+                    // If the response payload is a BlockHeader instance, we proceed to de-serialize it
+                    Type GetBlockHeaderResponse = new TypeToken<JsonRpcResponse<BlockHeader>>(){}.getType();
+                    parsedResponse = gson.fromJson(text, GetBlockHeaderResponse);
+                } else if(responsePayloadClass == AccountProperties.class){
+                    Type GetAccountByNameResponse = new TypeToken<JsonRpcResponse<AccountProperties>>(){}.getType();
+                    parsedResponse = gson.fromJson(text, GetAccountByNameResponse);
+                } else if(responsePayloadClass == HistoryOperationDetail.class){
+                    Type GetAccountHistoryByOperationsResponse = new TypeToken<JsonRpcResponse<HistoryOperationDetail>>(){}.getType();
+                    parsedResponse = gson.fromJson(text, GetAccountHistoryByOperationsResponse);
+                }else if(responsePayloadClass == DynamicGlobalProperties.class){
+                    Type GetDynamicGlobalPropertiesResponse = new TypeToken<JsonRpcResponse<DynamicGlobalProperties>>(){}.getType();
+                    parsedResponse = gson.fromJson(text, GetDynamicGlobalPropertiesResponse);
+                }else if(responsePayloadClass == Transaction.class){
+                    Type GetTransactionClass = new TypeToken<JsonRpcResponse<Transaction>>(){}.getType();
+                    parsedResponse = gson.fromJson(text, GetTransactionClass);
+                }else if(responsePayloadClass == List.class){
+                    // If the response payload is a List, further inquiry is required in order to
+                    // determine a list of what is expected here
+                    if(requestClass == GetAccounts.class){
+                        // If the request call was the wrapper to the get_accounts API call, we know
+                        // the response should be in the form of a JsonRpcResponse<List<AccountProperties>>
+                        // so we proceed with that
+                        Type GetAccountsResponse = new TypeToken<JsonRpcResponse<List<AccountProperties>>>(){}.getType();
+                        parsedResponse = gson.fromJson(text, GetAccountsResponse);
+                    }else if(requestClass == GetRequiredFees.class){
+                        Type GetRequiredFeesResponse = new TypeToken<JsonRpcResponse<List<AssetAmount>>>(){}.getType();
+                        parsedResponse = gson.fromJson(text, GetRequiredFeesResponse);
+                    }else if(requestClass == GetRelativeAccountHistory.class){
+                        Type RelativeAccountHistoryResponse = new TypeToken<JsonRpcResponse<List<OperationHistory>>>(){}.getType();
+                        parsedResponse = gson.fromJson(text, RelativeAccountHistoryResponse);
+                    }else if(requestClass == GetMarketHistory.class){
+                        Type GetMarketHistoryResponse = new TypeToken<JsonRpcResponse<List<BucketObject>>>(){}.getType();
+                        parsedResponse = gson.fromJson(text, GetMarketHistoryResponse);
+                    }else if(requestClass == GetObjects.class){
+                        parsedResponse = handleGetObject(text);
+                    }else if(requestClass == ListAssets.class){
+                        Type LisAssetsResponse = new TypeToken<JsonRpcResponse<List<Asset>>>(){}.getType();
+                        parsedResponse = gson.fromJson(text, LisAssetsResponse);
+                    }else if(requestClass == GetLimitOrders.class){
+                        Type GetLimitOrdersResponse = new TypeToken<JsonRpcResponse<List<LimitOrder>>>() {}.getType();
+                        parsedResponse = gson.fromJson(text, GetLimitOrdersResponse);
+                    } else if (requestClass == GetFullAccounts.class) {
+                        Type GetFullAccountsResponse = new TypeToken<JsonRpcResponse<List<FullAccountDetails>>>(){}.getType();
+                        parsedResponse = gson.fromJson(text, GetFullAccountsResponse);
+                    } else if(requestClass == GetKeyReferences.class){
+                        Type GetKeyReferencesResponse = new TypeToken<JsonRpcResponse<List<List<UserAccount>>>>(){}.getType();
+                        parsedResponse = gson.fromJson(text, GetKeyReferencesResponse);
+                    } else if(requestClass == GetAccountBalances.class){
+                        Type GetAccountBalancesResponse = new TypeToken<JsonRpcResponse<List<AssetAmount>>>(){}.getType();
+                        parsedResponse = gson.fromJson(text, GetAccountBalancesResponse);
+                    } else if(requestClass == GetAssets.class){
+                        Type GetAssetsResponse = new TypeToken<JsonRpcResponse<List<Asset>>>(){}.getType();
+                        parsedResponse = gson.fromJson(text, GetAssetsResponse);
+                    }else {
+                        Log.w(TAG,"Unknown request class");
+                    }
+                }else{
+                    Log.w(TAG,"Unhandled situation");
+                }
+            }
+
+            // In case the parsedResponse instance is null, we fall back to the raw response
+            if(parsedResponse == null){
+                parsedResponse = response;
+            }
+            // Broadcasting the parsed response to all interested listeners
+            RxBus.getBusInstance().send(parsedResponse);
+        }
+
+        /**
+         * Private method that will just broadcast a de-serialized notification to all interested parties
+         * @param notification  De-serialized notification
+         */
+        private void handleJsonRpcNotification(JsonRpcNotification notification){
+            // Broadcasting the parsed notification to all interested listeners
+            RxBus.getBusInstance().send(notification);
+        }
+
+        /**
+         * Method used to try to deserialize a 'get_objects' API call. Since this request can be used
+         * for several types of objects, the de-serialization procedure can be a bit more complex.
+         *
+         * @param response  Response to a 'get_objects' API call
+         */
+        private JsonRpcResponse handleGetObject(String response){
+            //TODO: Add support for other types of 'get_objects' request types
+            Gson gson = mDeserializationMap.getGson(GetObjects.class);
+            Type GetBitAssetResponse = new TypeToken<JsonRpcResponse<List<BitAssetData>>>(){}.getType();
+            return gson.fromJson(response, GetBitAssetResponse);
+        }
+
+        /**
+         * Method used to check all possible API accesses.
+         *
+         * The service will try to obtain sequentially API access ids for the following APIs:
+         *
+         * - Database
+         * - History
+         * - Network broadcast
+         */
+        private void checkNextRequestedApiAccess(){
+            if( (mRequestedApis & ApiAccess.API_DATABASE) == ApiAccess.API_DATABASE &&
+                    mApiIds.get(ApiAccess.API_DATABASE) == null){
+                // If we need the "database" api access and we don't yet have it
+
+                ApiCall apiCall = new ApiCall(1, RPC.CALL_DATABASE, null, RPC.VERSION, ++mCurrentId);
+                mLastCall = RPC.CALL_DATABASE;
+                sendMessage(apiCall.toJsonString());
+            } else if( (mRequestedApis & ApiAccess.API_HISTORY) == ApiAccess.API_HISTORY &&
+                    mApiIds.get(ApiAccess.API_HISTORY) == null){
+                // If we need the "history" api access and we don't yet have it
+
+                ApiCall apiCall = new ApiCall(1, RPC.CALL_HISTORY, null, RPC.VERSION, ++mCurrentId);
+                mLastCall = RPC.CALL_HISTORY;
+                sendMessage(apiCall.toJsonString());
+            }else if( (mRequestedApis & ApiAccess.API_NETWORK_BROADCAST) == ApiAccess.API_NETWORK_BROADCAST &&
+                    mApiIds.get(ApiAccess.API_NETWORK_BROADCAST) == null){
+                // If we need the "network_broadcast" api access and we don't yet have it
+
+                ApiCall apiCall = new ApiCall(1, RPC.CALL_NETWORK_BROADCAST, null, RPC.VERSION, ++mCurrentId);
+                mLastCall = RPC.CALL_NETWORK_BROADCAST;
+                sendMessage(apiCall.toJsonString());
+            }
+        }
+
+        @Override
+        public void onClosed(WebSocket webSocket, int code, String reason) {
+            super.onClosed(webSocket, code, reason);
+            if(code == GOING_AWAY_STATUS)
+                handleWebSocketDisconnection(true, false);
+            else
+                handleWebSocketDisconnection(false, false);
+        }
+
+        @Override
+        public void onFailure(WebSocket webSocket, Throwable t, Response response) {
+            super.onFailure(webSocket, t, response);
+            Log.e(TAG,"onFailure. Exception: "+t.getClass().getName()+", Msg: "+t.getMessage());
+            // Logging error stack trace
+            for(StackTraceElement element : t.getStackTrace()){
+                Log.v(TAG,String.format("%s#%s:%s", element.getClassName(), element.getMethodName(), element.getLineNumber()));
+            }
+
+            // If there is a response, we print it
+            if(response != null){
+                Log.e(TAG,"Response: "+response.message());
+            }
+
+            handleWebSocketDisconnection(true, true);
+        }
+
+        /**
+         * Method that encapsulates the behavior of handling a disconnection to the current node, and
+         * potentially tries to reconnect to another one.
+         *
+         * @param tryReconnection       States if a reconnection to other node should be tried.
+         * @param penalizeNode          Whether or not to penalize the current node with a very high latency reading.
+         */
+        private synchronized void handleWebSocketDisconnection(boolean tryReconnection, boolean penalizeNode) {
+            Log.d(TAG,"handleWebSocketDisconnection. try reconnection: " + tryReconnection + ", penalizeNode: " + penalizeNode);
+            RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.DISCONNECTED, ApiAccess.API_NONE));
+            isLoggedIn = false;
+
+            // Clearing previous request id to class mappings
+            mRequestClassMap.clear();
+
+            if(mSelectedNode != null){
+                // Marking the selected node as not connected
+                mSelectedNode.setConnected(false);
+
+                // Updating the selected node's 'connected' status on the NodeLatencyVerifier instance
+                if(nodeLatencyVerifier != null)
+                    nodeLatencyVerifier.updateActiveNodeInformation(mSelectedNode);
+
+                if (penalizeNode){
+                    // Adding a very high latency value to this node in order to prevent
+                    // us from getting it again
+                    mSelectedNode.addLatencyValue(Long.MAX_VALUE);
+                    nodeProvider.updateNode(mSelectedNode);
+                }
+            }
+
+            if(tryReconnection) {
+                // Registering current status
+                mCurrentId = 0;
+                mApiIds.clear();
+
+                RxBus.getBusInstance().send(new ConnectionStatusUpdate(ConnectionStatusUpdate.DISCONNECTED, ApiAccess.API_NONE));
+
+                if (nodeProvider.getBestNode() == null) {
+                    Log.e(TAG, "Giving up on connections");
+                    stopSelf();
+                } else {
+                    mHandler.postDelayed(new Runnable() {
+                        @Override
+                        public void run() {
+                            connect();
+                        }
+                    }, DEFAULT_RETRY_DELAY);
+                }
+            }
+
+            // We have currently no selected node
+            mSelectedNode = null;
+        }
+    };
+
+    /**
+     * Method used to check whether or not the network service is connected to a node that
+     * offers a specific API.
+     *
+     * @param whichApi  The API we want to use.
+     * @return          True if the node has got that API enabled, false otherwise
+     */
+    public boolean hasApiId(int whichApi){
+        return mApiIds.get(whichApi) != null;
+    }
+
+    /**
+     * Updates the full node details
+     * @param fullNode  Updated {@link FullNode} instance
+     */
+    public void updateNode(FullNode fullNode){
+        nodeProvider.updateNode(fullNode);
+    }
+
+    /**
+     * Returns a list of {@link FullNode} instances
+     * @return  List of full nodes
+     */
+    public List<FullNode> getNodes(){
+        return nodeProvider.getSortedNodes();
+    }
+
+
+    /**
+     * Returns the currently selected node
+     */
+    public FullNode getSelectedNode() { return mSelectedNode; }
+
+    /**
+     * Returns an observable that will notify its observers about node latency updates.
+     * @return  Observer of {@link FullNode} instances.
+     */
+    public PublishSubject<FullNode> getNodeLatencyObservable(){
+        return fullNodePublishSubject;
+    }
+
+    public NodeLatencyVerifier getNodeLatencyVerifier(){ return nodeLatencyVerifier; }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/android/NetworkServiceManager.java

@@ -0,0 +1,325 @@
+package cy.agorise.graphenej.api.android;
+
+import android.app.Activity;
+import android.app.Application;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.IBinder;
+
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import cy.agorise.graphenej.stats.ExponentialMovingAverage;
+
+/**
+ * This class should be instantiated at the application level of the android app.
+ *
+ * It will monitor the interaction between the different activities of an app and help us decide
+ * when the connection to the full node should be interrupted.
+ */
+
+public class NetworkServiceManager implements Application.ActivityLifecycleCallbacks  {
+    private final String TAG = this.getClass().getName();
+    /**
+     * Constant used to specify how long will the app wait for another activity to go through its starting life
+     * cycle events before running the teardownConnectionTask task.
+     *
+     * This is used as a means to detect whether or not the user has left the app.
+     */
+    private static final int DISCONNECT_DELAY = 1500;
+
+    /**
+     * Handler instance used to schedule tasks back to the main thread
+     */
+    private Handler mHandler = new Handler();
+
+    /**
+     * Weak reference to the application context
+     */
+    private WeakReference<Context> mContextReference;
+
+    // In case we want to interact directly with the service
+    private NetworkService mService;
+
+    // Attributes that might need to be passed to the NetworkService
+    private String mUserName = "";
+    private String mPassword = "";
+    private int mRequestedApis;
+    private List<String> mCustomNodeUrls = new ArrayList<>();
+    private boolean mAutoConnect;
+    private boolean mVerifyLatency;
+    // Flag used to make sure we only call 'bindService' once.
+//    private boolean mStartingService;
+
+    /**
+     * Runnable used to schedule a service disconnection once the app is not visible to the user for
+     * more than DISCONNECT_DELAY milliseconds.
+     */
+    private final Runnable mDisconnectRunnable = new Runnable() {
+        @Override
+        public void run() {
+            Context context = mContextReference.get();
+            if(mService != null){
+                context.unbindService(mServiceConnection);
+                mService = null;
+            }
+            context.stopService(new Intent(context, NetworkService.class));
+        }
+    };
+
+    private NetworkServiceManager(Context context){
+        mContextReference = new WeakReference<>(context);
+    }
+
+    @Override
+    public void onActivityCreated(Activity activity, Bundle bundle) { }
+
+    @Override
+    public void onActivityStarted(Activity activity) { }
+
+    @Override
+    public void onActivityResumed(Activity activity) {
+        mHandler.removeCallbacks(mDisconnectRunnable);
+        if(mService == null){
+            // Creating a new Intent that will be used to start the NetworkService
+            Context context = mContextReference.get();
+            Intent intent = new Intent(context, NetworkService.class);
+            context.bindService(intent, mServiceConnection, Context.BIND_AUTO_CREATE);
+        }
+    }
+
+    /**
+     * This method passes all the required information to the NetworkService to properly
+     * initialize itself
+     */
+    private void passRequiredInfoToConfigureService() {
+        // Adding user-provided node URLs
+        StringBuilder stringBuilder = new StringBuilder();
+        Iterator<String> it = mCustomNodeUrls.iterator();
+        while(it.hasNext()){
+            stringBuilder.append(it.next());
+            if(it.hasNext()) stringBuilder.append(",");
+        }
+        String customNodes = stringBuilder.toString();
+
+        Bundle b = new Bundle();
+
+        // Adding all
+        b.putString(NetworkService.KEY_USERNAME, mUserName);
+        b.putString(NetworkService.KEY_PASSWORD, mPassword);
+        b.putInt(NetworkService.KEY_REQUESTED_APIS, mRequestedApis);
+        b.putString(NetworkService.KEY_NODE_URLS, customNodes);
+        b.putBoolean(NetworkService.KEY_AUTO_CONNECT, mAutoConnect);
+        b.putBoolean(NetworkService.KEY_ENABLE_LATENCY_VERIFIER, mVerifyLatency);
+
+        mService.bootstrapService(b);
+    }
+
+    @Override
+    public void onActivityPaused(Activity activity) {
+        mHandler.postDelayed(mDisconnectRunnable, DISCONNECT_DELAY);
+    }
+
+    @Override
+    public void onActivityStopped(Activity activity) {}
+
+    @Override
+    public void onActivitySaveInstanceState(Activity activity, Bundle bundle) {}
+
+    @Override
+    public void onActivityDestroyed(Activity activity) {}
+
+    /** Defines callbacks for backend binding, passed to bindService() */
+    private ServiceConnection mServiceConnection = new ServiceConnection() {
+
+        @Override
+        public void onServiceConnected(ComponentName className,
+                                       IBinder service) {
+            // We've bound to LocalService, cast the IBinder and get LocalService instance
+            NetworkService.LocalBinder binder = (NetworkService.LocalBinder) service;
+            boolean passInfo = false;
+            if(mService == null){
+                mService = binder.getService();
+                // We only pass the required information in case this is the first time we get a reference
+                // to the NetworkService instance.
+                passInfo = true;
+            }
+            if(passInfo)
+                passRequiredInfoToConfigureService();
+        }
+
+        @Override
+        public void onServiceDisconnected(ComponentName componentName) {
+        }
+    };
+
+    public String getUserName() {
+        return mUserName;
+    }
+
+    public void setUserName(String userName) {
+        this.mUserName = userName;
+    }
+
+    public String getPassword() {
+        return mPassword;
+    }
+
+    public void setPassword(String mPassword) {
+        this.mPassword = mPassword;
+    }
+
+    public int getRequestedApis() {
+        return mRequestedApis;
+    }
+
+    public void setRequestedApis(int mRequestedApis) {
+        this.mRequestedApis = mRequestedApis;
+    }
+
+    public List<String> getCustomNodeUrls() {
+        return mCustomNodeUrls;
+    }
+
+    public void setCustomNodeUrls(List<String> mCustomNodeUrls) {
+        this.mCustomNodeUrls = mCustomNodeUrls;
+    }
+
+    public boolean isAutoConnect() {
+        return mAutoConnect;
+    }
+
+    public void setAutoConnect(boolean mAutoConnect) {
+        this.mAutoConnect = mAutoConnect;
+    }
+
+    public boolean isVerifyLatency() {
+        return mVerifyLatency;
+    }
+
+    public void setVerifyLatency(boolean mVerifyLatency) {
+        this.mVerifyLatency = mVerifyLatency;
+    }
+
+    /**
+     * Class used to create a {@link NetworkServiceManager} with specific attributes.
+     */
+    public static class Builder {
+        private String username;
+        private String password;
+        private int requestedApis;
+        private List<String> customNodeUrls;
+        private boolean autoconnect = true;
+        private boolean verifyNodeLatency;
+        private double alpha = ExponentialMovingAverage.DEFAULT_ALPHA;
+
+        /**
+         * Sets the user name, if required to connect to a node.
+         * @param name  User name
+         * @return      The Builder instance
+         */
+        public Builder setUserName(String name){
+            this.username = name;
+            return this;
+        }
+
+        /**
+         * Sets the password, if required to connect to a node.
+         * @param password  Password
+         * @return          The Builder instance
+         */
+        public Builder setPassword(String password){
+            this.password = password;
+            return this;
+        }
+
+        /**
+         * Sets an integer with the requested APIs encoded as binary flags.
+         * @param apis  Integer representing the different APIs we require from the node.
+         * @return      The Builder instance
+         */
+        public Builder setRequestedApis(int apis){
+            this.requestedApis = apis;
+            return this;
+        }
+
+        /**
+         * Adds a list of custom node URLs.
+         * @param nodeUrls  List of custom full node URLs.
+         * @return          The Builder instance
+         */
+        public Builder setCustomNodeUrls(List<String> nodeUrls){
+            this.customNodeUrls = nodeUrls;
+            return this;
+        }
+
+        /**
+         * Adds a list of custom node URLs.
+         * @param nodeUrls  List of custom full node URLs.
+         * @return          The Builder instance
+         */
+        public Builder setCustomNodeUrls(String nodeUrls){
+            String[] urls = nodeUrls.split(",");
+            for(String url : urls){
+                if(customNodeUrls == null) customNodeUrls = new ArrayList<>();
+                customNodeUrls.add(url);
+            }
+            return this;
+        }
+
+        /**
+         * Sets the autoconnect flag. This is true by default.
+         * @param autoConnect   True if we want the service to connect automatically, false otherwise.
+         * @return              The Builder instance
+         */
+        public Builder setAutoConnect(boolean autoConnect){
+            this.autoconnect = autoConnect;
+            return this;
+        }
+
+        /**
+         * Sets the node-verification flag. This is false by default.
+         * @param verifyLatency True if we want the service to perform a latency analysis before connecting.
+         * @return              The Builder instance.
+         */
+        public Builder setNodeLatencyVerification(boolean verifyLatency){
+            this.verifyNodeLatency = verifyLatency;
+            return this;
+        }
+
+        /**
+         * Sets the node latency verification's exponential moving average alpha parameter.
+         * @param alpha The alpha parameter to use when computing the exponential moving average of the
+         *              measured latencies.
+         * @return              The Builder instance.
+         */
+        public Builder setLatencyAverageAlpha(double alpha){
+            this.alpha = alpha;
+            return this;
+        }
+
+        /**
+         * Method used to build a {@link NetworkServiceManager} instance with all of the characteristics
+         * passed as parameters.
+         * @param context   A Context of the application package implementing
+         * this class.
+         * @return          Instance of the NetworkServiceManager class.
+         */
+        public NetworkServiceManager build(Context context){
+            NetworkServiceManager manager = new NetworkServiceManager(context);
+            if(username != null) manager.setUserName(username); else manager.setUserName("");
+            if(password != null) manager.setPassword(password); else manager.setPassword("");
+            if(customNodeUrls != null) manager.setCustomNodeUrls(customNodeUrls);
+            manager.setRequestedApis(requestedApis);
+            manager.setAutoConnect(autoconnect);
+            manager.setVerifyLatency(verifyNodeLatency);
+            return manager;
+        }
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/android/RxBus.java

@@ -0,0 +1,36 @@
+package cy.agorise.graphenej.api.android;
+
+import com.jakewharton.rxrelay2.PublishRelay;
+import com.jakewharton.rxrelay2.Relay;
+
+import io.reactivex.BackpressureStrategy;
+import io.reactivex.Flowable;
+
+/**
+ * Explained here: https://blog.kaush.co/2014/12/24/implementing-an-event-bus-with-rxjava-rxbus/
+ */
+public class RxBus {
+
+    private static RxBus rxBus;
+
+    public static final RxBus getBusInstance(){
+        if(rxBus == null){
+            rxBus = new RxBus();
+        }
+        return rxBus;
+    }
+
+    private final Relay<Object> _bus = PublishRelay.create().toSerialized();
+
+    public void send(Object o) {
+        _bus.accept(o);
+    }
+
+    public Flowable<Object> asFlowable() {
+        return _bus.toFlowable(BackpressureStrategy.LATEST);
+    }
+
+    public boolean hasObservers() {
+        return _bus.hasObservers();
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/ApiCallable.java

@@ -0,0 +1,17 @@
+package cy.agorise.graphenej.api.calls;
+
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Interface to be implemented by all classes that will produce an ApiCall object instance
+ * as a result.
+ */
+
+public interface ApiCallable {
+
+    /**
+     *
+     * @return An instance of the {@link ApiCall} class
+     */
+    ApiCall toApiCall(int apiId, long sequenceId);
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/BroadcastTransaction.java

@@ -0,0 +1,27 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.Transaction;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class BroadcastTransaction implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_NETWORK_BROADCAST;
+
+    private Transaction mTransaction;
+
+    public BroadcastTransaction(Transaction transaction){
+        if(!transaction.hasPrivateKey()) throw new IllegalStateException("The Transaction instance has to be provided with a private key in order to be broadcasted");
+        mTransaction = transaction;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> transactions = new ArrayList<>();
+        transactions.add(mTransaction);
+        return new ApiCall(apiId, RPC.CALL_BROADCAST_TRANSACTION, transactions, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/CancelAllSubscriptions.java

@@ -0,0 +1,17 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class CancelAllSubscriptions implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_DATABASE;
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        return new ApiCall(apiId, RPC.CALL_CANCEL_ALL_SUBSCRIPTIONS, new ArrayList<Serializable>(), RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetAccountBalances.java

@@ -0,0 +1,42 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.Asset;
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Wrapper around the 'get_account_balances' API call.
+ *
+ * @see <a href="https://goo.gl/faFdey">get_account_balances API doc</a>
+ */
+public class GetAccountBalances implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    private UserAccount mUserAccount;
+    private List<Asset> mAssetList;
+
+    public GetAccountBalances(UserAccount userAccount, List<Asset> assets){
+        mUserAccount = userAccount;
+        mAssetList = assets;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        ArrayList<Serializable> assetList = new ArrayList<>();
+        if(mAssetList != null){
+            for(Asset asset : mAssetList){
+                assetList.add(asset.getObjectId());
+            }
+        }
+        params.add(mUserAccount.getObjectId());
+        params.add(assetList);
+        return new ApiCall(apiId, RPC.CALL_GET_ACCOUNT_BALANCES, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetAccountByName.java

@@ -0,0 +1,25 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class GetAccountByName implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    private String accountName;
+
+    public GetAccountByName(String name){
+        this.accountName = name;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> accountParams = new ArrayList<>();
+        accountParams.add(this.accountName);
+        return new ApiCall(apiId, RPC.CALL_GET_ACCOUNT_BY_NAME, accountParams, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetAccountHistory.java

@@ -0,0 +1,43 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class GetAccountHistory implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_HISTORY;
+
+    private UserAccount mUserAccount;
+    private String startOperation;
+    private String endOperation;
+    private int limit;
+
+    public GetAccountHistory(UserAccount userAccount, String start, String end, int limit){
+        this.mUserAccount = userAccount;
+        this.startOperation = start;
+        this.endOperation = end;
+        this.limit = limit;
+    }
+
+    public GetAccountHistory(String userId, String start, String end, int limit){
+        this.mUserAccount = new UserAccount(userId);
+        this.startOperation = start;
+        this.endOperation = end;
+        this.limit = limit;
+    }
+
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        params.add(mUserAccount.getObjectId());
+        params.add(endOperation);
+        params.add(limit);
+        params.add(startOperation);
+        return new ApiCall(apiId, RPC.CALL_GET_ACCOUNT_HISTORY, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetAccountHistoryByOperations.java

@@ -0,0 +1,69 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.OperationType;
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class GetAccountHistoryByOperations implements ApiCallable {
+
+    public static final int REQUIRED_API = ApiAccess.API_HISTORY;
+
+    private UserAccount mUserAccount;
+    private List<OperationType> mOperationTypes;
+    private long mStart;
+    private long mLimit;
+
+    /**
+     * @param userAccount       The user account that should be queried
+     * @param operationsTypes   The IDs of the operation we want to get operations in the account( 0 = transfer , 1 = limit order create, ...)
+     * @param start             The sequence number where to start listing operations
+     * @param limit             The max number of entries to return (from start number)
+     */
+    public GetAccountHistoryByOperations(UserAccount userAccount, List<OperationType> operationsTypes, long start, long limit){
+        this.mUserAccount = userAccount;
+        this.mOperationTypes = operationsTypes;
+        this.mStart = start;
+        this.mLimit = limit;
+    }
+
+    /**
+     * @param userAccount       The user account that should be queried
+     * @param operationsTypes   The IDs of the operation we want to get operations in the account( 0 = transfer , 1 = limit order create, ...)
+     * @param start             The sequence number where to start listing operations
+     * @param limit             The max number of entries to return (from start number)
+     */
+    public GetAccountHistoryByOperations(String userAccount, List<OperationType> operationsTypes, long start, long limit){
+        if(userAccount.matches("^1\\.2\\.\\d*$")){
+            this.mUserAccount = new UserAccount(userAccount);
+        }else{
+            this.mUserAccount = new UserAccount("", userAccount);
+        }
+        this.mOperationTypes = operationsTypes;
+        this.mStart = start;
+        this.mLimit = limit;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        if(mUserAccount.getName() != null){
+            params.add(mUserAccount.getName());
+        }else{
+            params.add(mUserAccount.getObjectId());
+        }
+        ArrayList<Integer> operationTypes = new ArrayList<>();
+        for(OperationType operationType : mOperationTypes){
+            operationTypes.add(operationType.ordinal());
+        }
+        params.add(operationTypes);
+        params.add(mStart);
+        params.add(mLimit);
+        return new ApiCall(apiId, RPC.CALL_GET_ACCOUNT_HISTORY_BY_OPERATIONS, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetAccounts.java

@@ -0,0 +1,39 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Wrapper around the "get_accounts" API call.
+ */
+public class GetAccounts implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    private List<UserAccount> mUserAccounts;
+
+    public GetAccounts(List<UserAccount> accountList){
+        mUserAccounts = accountList;
+    }
+
+    public GetAccounts(UserAccount userAccount){
+        mUserAccounts = new ArrayList<>();
+        mUserAccounts.add(userAccount);
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        ArrayList<Serializable> accountIds = new ArrayList<>();
+        for(UserAccount userAccount : mUserAccounts){
+            accountIds.add(userAccount.getObjectId());
+        }
+        params.add(accountIds);
+        return new ApiCall(apiId, RPC.CALL_GET_ACCOUNTS, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetAssets.java

@@ -0,0 +1,54 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.Asset;
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class GetAssets implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    private List<Asset> assetList = new ArrayList<>();
+
+    /**
+     * Constructor that will receive a List of Asset instances.
+     *
+     * @param assets List of Asset instances.
+     */
+    public GetAssets(List<Asset> assets){
+        assetList.addAll(assets);
+    }
+
+    /**
+     * Constructor that will accept a string containing the asset id.
+     *
+     * @param id String containing the asset id of the desired asset.
+     */
+    public GetAssets(String id){
+        assetList.add(new Asset(id));
+    }
+
+    /**
+     * Constructor that accepts an {@link Asset} object instance.
+     *
+     * @param asset Asset class instance.
+     */
+    public GetAssets(Asset asset){
+        assetList.add(asset);
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        ArrayList<Serializable> assetIds = new ArrayList<>();
+        for(Asset asset : assetList){
+            assetIds.add(asset.getObjectId());
+        }
+        params.add(assetIds);
+        return new ApiCall(apiId, RPC.CALL_GET_ASSETS, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetBlock.java

@@ -0,0 +1,30 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Wrapper around the "get_block" API call.
+ */
+
+public class GetBlock implements ApiCallable {
+
+    public static final int REQUIRED_API = ApiAccess.API_DATABASE;
+
+    private long blockNumber;
+
+    public GetBlock(long blockNum){
+        this.blockNumber = blockNum;
+    }
+
+    public ApiCall toApiCall(int apiId, long sequenceId){
+        ArrayList<Serializable> params = new ArrayList<>();
+        String blockNum = String.format("%d", this.blockNumber);
+        params.add(blockNum);
+        return new ApiCall(apiId, RPC.CALL_GET_BLOCK, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetBlockHeader.java

@@ -0,0 +1,30 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Wrapper around the "get_block_header" API call. To be used in the single-connection mode.
+ */
+public class GetBlockHeader implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_DATABASE;
+
+    private long blockNumber;
+
+    public GetBlockHeader(long number){
+        this.blockNumber = number;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        String blockNum = String.format("%d", this.blockNumber);
+        params.add(blockNum);
+
+        return new ApiCall(apiId, RPC.CALL_GET_BLOCK_HEADER, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetDynamicGlobalProperties.java

@@ -0,0 +1,18 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class GetDynamicGlobalProperties implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        return new ApiCall(apiId, RPC.CALL_GET_DYNAMIC_GLOBAL_PROPERTIES, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetFullAccounts.java

@@ -0,0 +1,45 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Wrapper around the 'get_full_accounts' API call.
+ */
+public class GetFullAccounts implements ApiCallable {
+
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    private List<String> mUserAccounts;
+    private boolean mSubscribe;
+
+    public GetFullAccounts(UserAccount userAccount, boolean subscribe){
+        this.mUserAccounts = new ArrayList<>();
+        if(userAccount.getName() != null && !userAccount.getName().equals("")){
+            this.mUserAccounts.add(userAccount.getName());
+        }else{
+            this.mUserAccounts.add(userAccount.getObjectId());
+        }
+        this.mSubscribe = subscribe;
+    }
+
+    public GetFullAccounts(List<String> accounts, boolean subscribe){
+        this.mUserAccounts = accounts;
+        this.mSubscribe = subscribe;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        ArrayList<Serializable> accounts = new ArrayList<Serializable>(mUserAccounts);
+        params.add(accounts);
+        params.add(mSubscribe);
+        return new ApiCall(apiId, RPC.CALL_GET_FULL_ACCOUNTS, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetKeyReferences.java

@@ -0,0 +1,43 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.Address;
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.errors.MalformedAddressException;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Wrapper around the 'get_key_references' API call.
+ */
+public class GetKeyReferences implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    private List<Address> addresses = new ArrayList<>();
+
+    public GetKeyReferences(String addr) throws MalformedAddressException, IllegalArgumentException {
+        this(new Address(addr));
+    }
+
+    public GetKeyReferences(Address address){
+        addresses.add(address);
+    }
+
+    public GetKeyReferences(List<Address> addressList){
+        addresses.addAll(addressList);
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> inner = new ArrayList<Serializable>();
+        for(Address addr : addresses){
+            inner.add(addr.toString());
+        }
+        ArrayList<Serializable> params = new ArrayList<>();
+        params.add(inner);
+        return new ApiCall(apiId, RPC.CALL_GET_KEY_REFERENCES, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetLimitOrders.java

@@ -0,0 +1,41 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**  Class that implements get_limit_orders request handler.
+ *
+ *  Get limit orders in a given market.
+ *
+ *  The request returns the limit orders, ordered from least price to greatest
+ *
+ *  @see <a href="https://goo.gl/5sRTRq">get_limit_orders API doc</a>
+ *
+ */
+public class GetLimitOrders implements ApiCallable  {
+
+    public static final int REQUIRED_API = ApiAccess.API_DATABASE;
+
+    private String a;
+    private String b;
+    private int limit;
+
+    public GetLimitOrders(String a, String b, int limit){
+        this.a = a;
+        this.b = b;
+        this.limit = limit;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> parameters = new ArrayList<>();
+        parameters.add(a);
+        parameters.add(b);
+        parameters.add(limit);
+        return new ApiCall(apiId, RPC.CALL_GET_LIMIT_ORDERS, parameters, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetMarketHistory.java

@@ -0,0 +1,86 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Date;
+
+import cy.agorise.graphenej.Asset;
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class GetMarketHistory implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_HISTORY;
+
+    public static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyyMMdd'T'HHmmss");
+
+    // API call parameters
+    private Asset base;
+    private Asset quote;
+    private long bucket;
+    private Date start;
+    private Date end;
+
+    /**
+     * Constructor that receives the start and end time as UNIX timestamp in milliseconds.
+     *
+     * @param base      Desired asset history
+     * @param quote     Asset to which the base price will be compared to
+     * @param bucket    The time interval (in seconds) for each point should be (analog to
+     *                      candles on a candle stick graph).
+     * @param start     Timestamp (POSIX) of of the most recent operation to retrieve
+     *                  (Note: The name can be counter intuitive, but it follow the original
+     *                  API parameter name)
+     * @param end       Timestamp (POSIX) of the the earliest operation to retrieve
+     */
+    public GetMarketHistory(Asset base, Asset quote, long bucket, long start, long end){
+        this(base, quote, bucket, fromTimestamp(start), fromTimestamp(end));
+    }
+
+    /**
+     * Constructor that receives the start and end time as Date instance objects.
+     *
+     * @param base      Desired asset history
+     * @param quote     Asset to which the base price will be compared to
+     * @param bucket    The time interval (in seconds) for each point should be (analog to
+     *                      candles on a candle stick graph).
+     * @param start     Date and time of of the most recent operation to retrieve
+     *                  (Note: The name can be counter intuitive, but it follow the original
+     *                  API parameter name)
+     * @param end       Date and time of the the earliest operation to retrieve
+     */
+    public GetMarketHistory(Asset base, Asset quote, long bucket, Date start, Date end){
+        this.base = base;
+        this.quote = quote;
+        this.bucket = bucket;
+        this.start = start;
+        this.end = end;
+    }
+
+    /**
+     * Internal method used to convert a timestamp to a Date.
+     *
+     * @param timestamp POSIX timestamp expressed in milliseconds since 1/1/1970
+     * @return          Date instance
+     */
+    private static Date fromTimestamp(long timestamp){
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTimeInMillis(timestamp);
+        calendar.set(Calendar.MINUTE, 0);
+        calendar.set(Calendar.SECOND, 0);
+        return calendar.getTime();
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        params.add(this.base.getObjectId());
+        params.add(this.quote.getObjectId());
+        params.add(this.bucket);
+        params.add(DATE_FORMAT.format(this.start));
+        params.add(DATE_FORMAT.format(this.end));
+        return new ApiCall(apiId, RPC.CALL_GET_MARKET_HISTORY, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetObjects.java

@@ -0,0 +1,29 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Wrapper around the "get_objects" API call.
+ */
+public class GetObjects implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_DATABASE;
+    private List<String> ids;
+
+    public GetObjects(List<String> ids){
+        this.ids = ids;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        ArrayList<String> subParams = new ArrayList<>(ids);
+        params.add(subParams);
+        return new ApiCall(apiId, RPC.CALL_GET_OBJECTS, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetRelativeAccountHistory.java

@@ -0,0 +1,47 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Wrapper around the "get_relative_account_history" API call
+ */
+public class GetRelativeAccountHistory implements ApiCallable {
+
+    public static final int REQUIRED_API = ApiAccess.API_HISTORY;
+
+    // API call parameters
+    private UserAccount mUserAccount;
+    private int stop;
+    private int limit;
+    private int start;
+
+    /**
+     * Constructor
+     * @param userAccount
+     * @param stop
+     * @param limit
+     * @param start
+     */
+    public GetRelativeAccountHistory(UserAccount userAccount, int stop, int limit, int start){
+        this.mUserAccount = userAccount;
+        this.stop = stop;
+        this.limit = limit;
+        this.start = start;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        params.add(mUserAccount.getObjectId());
+        params.add(this.stop);
+        params.add(this.limit);
+        params.add(this.start);
+        return new ApiCall(apiId, RPC.CALL_GET_RELATIVE_ACCOUNT_HISTORY, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetRequiredFees.java

@@ -0,0 +1,44 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.Asset;
+import cy.agorise.graphenej.BaseOperation;
+import cy.agorise.graphenej.BlockData;
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.Transaction;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+/**
+ * Wrapper around the "get_required_fees" API call
+ */
+
+public class GetRequiredFees implements ApiCallable {
+
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    private Transaction mTransaction;
+    private Asset mFeeAsset;
+
+    public GetRequiredFees(Transaction transaction, Asset feeAsset){
+        this.mTransaction = transaction;
+        this.mFeeAsset = feeAsset;
+    }
+
+    public GetRequiredFees(List<BaseOperation> operations, Asset feeAsset){
+        this.mTransaction = new Transaction(new BlockData(0, 0, 0), operations);
+        this.mFeeAsset = feeAsset;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        // Building a new API call to request fees information
+        ArrayList<Serializable> accountParams = new ArrayList<>();
+        accountParams.add((Serializable) mTransaction.getOperations());
+        accountParams.add(this.mFeeAsset.getObjectId());
+        return new ApiCall(apiId, RPC.CALL_GET_REQUIRED_FEES, accountParams, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/GetTransaction.java

@@ -0,0 +1,29 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class GetTransaction implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    private long blockNumber;
+    private long txIndex;
+
+    public GetTransaction(long blockNumber, long txIndex){
+        this.blockNumber = blockNumber;
+        this.txIndex = txIndex;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        List<Serializable> params = new ArrayList<>();
+        params.add(blockNumber);
+        params.add(txIndex);
+        return new ApiCall(apiId, RPC.CALL_GET_TRANSACTION, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/ListAssets.java

@@ -0,0 +1,44 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class ListAssets implements ApiCallable {
+
+    public static final int REQUIRED_API = ApiAccess.API_DATABASE;
+
+    /**
+     * Constant that must be used as argument to the constructor of this class to indicate
+     * that the user wants to get all existing assets.
+     */
+    public static final int LIST_ALL = -1;
+
+    /**
+     * Internal constant used to represent the maximum limit of assets retrieved in one call.
+     */
+    public static final int MAX_BATCH_SIZE = 100;
+
+    private String lowerBound;
+    private int limit;
+
+    public ListAssets(String lowerBoundSymbol, int limit){
+        this.lowerBound = lowerBoundSymbol;
+        this.limit = limit;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        params.add(this.lowerBound);
+        if(limit > MAX_BATCH_SIZE || limit == LIST_ALL){
+            params.add(MAX_BATCH_SIZE);
+        }else{
+            params.add(this.limit);
+        }
+        return new ApiCall(apiId, RPC.CALL_LIST_ASSETS, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/LookupAssetSymbols.java

@@ -0,0 +1,37 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.Asset;
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class LookupAssetSymbols implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_NONE;
+
+    private List<Asset> mAssetList;
+
+    public LookupAssetSymbols(List<Asset> assetList){
+        this.mAssetList = assetList;
+    }
+
+    public LookupAssetSymbols(Asset asset){
+        mAssetList = new ArrayList<Asset>();
+        mAssetList.add(asset);
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> params = new ArrayList<>();
+        ArrayList<String> subArray = new ArrayList<>();
+        for(int i = 0; i < mAssetList.size(); i++){
+            Asset asset = mAssetList.get(i);
+            subArray.add(asset.getObjectId());
+            params.add(subArray);
+        }
+        return new ApiCall(apiId, RPC.CALL_LOOKUP_ASSET_SYMBOLS, params, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/api/calls/SetSubscribeCallback.java

@@ -0,0 +1,26 @@
+package cy.agorise.graphenej.api.calls;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.RPC;
+import cy.agorise.graphenej.api.ApiAccess;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class SetSubscribeCallback implements ApiCallable {
+    public static final int REQUIRED_API = ApiAccess.API_DATABASE;
+
+    private boolean clearFilter;
+
+    public SetSubscribeCallback(boolean clearFilter){
+        this.clearFilter = clearFilter;
+    }
+
+    @Override
+    public ApiCall toApiCall(int apiId, long sequenceId) {
+        ArrayList<Serializable> subscriptionParams = new ArrayList<>();
+        subscriptionParams.add(new Long(sequenceId));
+        subscriptionParams.add(clearFilter);
+        return new ApiCall(apiId, RPC.CALL_SET_SUBSCRIBE_CALLBACK, subscriptionParams, RPC.VERSION, sequenceId);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/models/ApiCall.java

@@ -19,6 +19,7 @@ import cy.agorise.graphenej.interfaces.JsonSerializable;
  * @see <a href="http://docs.bitshares.org/api/websocket.html">Websocket Calls & Notifications</a>
  */
 public class ApiCall implements JsonSerializable {
+
     public static final String KEY_SEQUENCE_ID = "id";
     public static final String KEY_METHOD = "method";
     public static final String KEY_PARAMS = "params";
@@ -65,7 +66,7 @@ public class ApiCall implements JsonSerializable {
         paramsArray.add(this.apiId);
         paramsArray.add(this.methodToCall);
         JsonArray methodParams = new JsonArray();
-
+        if(this.params != null){
             for(int i = 0; i < this.params.size(); i++){
                 if(this.params.get(i) instanceof JsonSerializable) {
                     // Sometimes the parameters are objects
@@ -86,6 +87,10 @@ public class ApiCall implements JsonSerializable {
                             array.add(((JsonSerializable) element).toJsonObject());
                         else if (element instanceof String) {
                             array.add((String) element);
+                        }else if (element instanceof Long){
+                            array.add((Long) element);
+                        }else if(element instanceof Integer){
+                            array.add((Integer) element);
                         }
                     }
                     methodParams.add(array);
@@ -95,6 +100,7 @@ public class ApiCall implements JsonSerializable {
                     System.out.println("Skipping parameter of type: "+this.params.get(i).getClass());
                 }
             }
+        }
         paramsArray.add(methodParams);
         obj.add(KEY_PARAMS, paramsArray);
         obj.addProperty(KEY_JSON_RPC, this.jsonrpc);

graphenej/src/main/java/cy/agorise/graphenej/models/AssetFeed.java

@@ -1,13 +1,80 @@
 package cy.agorise.graphenej.models;
 
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+
+import java.lang.reflect.Type;
+
 import cy.agorise.graphenej.Price;
 
 /**
- * Created by nelson on 1/9/17.
+ * Price feed of a given asset.
  */
 public class AssetFeed {
-    public Price settlement_price;
+    public static final String KEY_SETTLEMENT_PRICE = "settlement_price";
-    public long maintenance_collateral_ratio;
+    public static final String KEY_MAINTENANCE_COLLATERAL_RATIO = "maintenance_collateral_ratio";
-    public long maximum_short_squeeze_ratio;
+    public static final String KEY_MAXIMUM_SHORT_SQUEEZE_RATIO = "maximum_short_squeeze_ratio";
-    public Price core_exchange_rate;
+    public static final String KEY_CORE_EXCHANGE_RATE = "core_exchange_rate";
+
+    private Price settlement_price;
+    private long maintenance_collateral_ratio;
+    private long maximum_short_squeeze_ratio;
+    private Price core_exchange_rate;
+
+    public AssetFeed(Price settlementPrice, long maintenanceCollateralRatio, long maximumShortSqueezeRatio, Price coreExchangeRate){
+        this.settlement_price = settlementPrice;
+        this.maintenance_collateral_ratio = maintenanceCollateralRatio;
+        this.maximum_short_squeeze_ratio = maximumShortSqueezeRatio;
+        this.core_exchange_rate = coreExchangeRate;
+    }
+
+    public Price getSettlementPrice() {
+        return settlement_price;
+    }
+
+    public void setSettlementPrice(Price settlement_price) {
+        this.settlement_price = settlement_price;
+    }
+
+    public long getMaintenanceCollateralRatio() {
+        return maintenance_collateral_ratio;
+    }
+
+    public void setMaintenanceCollateralRatio(long maintenance_collateral_ratio) {
+        this.maintenance_collateral_ratio = maintenance_collateral_ratio;
+    }
+
+    public long getMaximumShortSqueezeRatio() {
+        return maximum_short_squeeze_ratio;
+    }
+
+    public void setMaximumShortSqueezeRatio(long maximum_short_squeeze_ratio) {
+        this.maximum_short_squeeze_ratio = maximum_short_squeeze_ratio;
+    }
+
+    public Price getCoreExchangeRate() {
+        return core_exchange_rate;
+    }
+
+    public void setCoreExchangeRate(Price core_exchange_rate) {
+        this.core_exchange_rate = core_exchange_rate;
+    }
+
+    public static class AssetFeedDeserializer implements JsonDeserializer<AssetFeed> {
+
+        @Override
+        public AssetFeed deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            JsonObject jsonObject = json.getAsJsonObject();
+            Price settlementPrice = context.deserialize(jsonObject.get(KEY_SETTLEMENT_PRICE).getAsJsonObject(), Price.class);
+            long collateralRatio = jsonObject.get(KEY_MAINTENANCE_COLLATERAL_RATIO).getAsLong();
+            long maximumShortSqueezeRatio = jsonObject.get(KEY_MAXIMUM_SHORT_SQUEEZE_RATIO).getAsLong();
+            Price coreExchangeRate = context.deserialize(jsonObject.get(KEY_CORE_EXCHANGE_RATE), Price.class);
+            AssetFeed assetFeed = new AssetFeed(settlementPrice, collateralRatio, maximumShortSqueezeRatio, coreExchangeRate);
+            return assetFeed;
+        }
+    }
+
 }

graphenej/src/main/java/cy/agorise/graphenej/models/BaseResponse.java

@@ -1,7 +1,8 @@
 package cy.agorise.graphenej.models;
 
 /**
- * Created by nelson on 11/12/16.
+ * Base response class
+ * @deprecated Use {@link JsonRpcResponse} instead
  */
 public class BaseResponse {
     public long id;

graphenej/src/main/java/cy/agorise/graphenej/models/BitAssetData.java

@@ -1,25 +1,158 @@
 package cy.agorise.graphenej.models;
 
+import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+
+import java.lang.reflect.Type;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+
 import cy.agorise.graphenej.GrapheneObject;
 import cy.agorise.graphenej.Price;
+import cy.agorise.graphenej.Util;
 
 /**
  * This is the representation of the response from the 'get_objects' call with
  * a 2.4.x id, which will retrieve a 'impl_asset_bitasset_data_type'.
  *
- * Created by nelson on 1/8/17.
  */
 public class BitAssetData extends GrapheneObject {
-    public Object[] feeds;
+    public static final String KEY_FEEDS = "feeds";
-    public AssetFeed current_feed;
+    public static final String KEY_CURRENT_FEED = "current_feed";
-    public String current_feed_publication_time;
+    public static final String KEY_CURRENT_FEED_PUBLICATION_TIME = "current_feed_publication_time";
-    public Object options;
+    public static final String KEY_OPERATIONS = "operations";
-    public long force_settled_volume;
+    public static final String KEY_FORCE_SETTLED_VOLUME = "force_settled_volume";
-    public boolean is_prediction_market;
+    public static final String KEY_IS_PREDICTION_MARKET = "is_prediction_market";
-    public Price settlement_price;
+    public static final String KEY_SETTLEMENT_PRICE = "settlement_price";
-    public long settlement_fund;
+    public static final String KEY_SETTLEMENT_FUND = "settlement_fund";
+
+    private ReportedAssetFeed[] feeds;
+    private AssetFeed current_feed;
+    private Date current_feed_publication_time;
+    private Options options;
+    private long force_settled_volume;
+    private boolean is_prediction_market;
+    private Price settlement_price;
+    private long settlement_fund;
 
     public BitAssetData(String id) {
         super(id);
     }
+
+    public ReportedAssetFeed[] getFeeds() {
+        return feeds;
+    }
+
+    public void setFeeds(ReportedAssetFeed[] feeds) {
+        this.feeds = feeds;
+    }
+
+    public AssetFeed getCurrentFeed() {
+        return current_feed;
+    }
+
+    public void setCurrentFeed(AssetFeed current_feed) {
+        this.current_feed = current_feed;
+    }
+
+    public Date getCurrentFeedPublicationTime() {
+        return current_feed_publication_time;
+    }
+
+    public void setCurrentFeedPublicationTime(String currentFeedPublicationTime) {
+        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(Util.TIME_DATE_FORMAT);
+        try {
+            this.current_feed_publication_time = simpleDateFormat.parse(currentFeedPublicationTime);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public Options getOptions() {
+        return options;
+    }
+
+    public void setOptions(Options options) {
+        this.options = options;
+    }
+
+    public long getForceSettledVolume() {
+        return force_settled_volume;
+    }
+
+    public void setForceSettledVolume(long force_settled_volume) {
+        this.force_settled_volume = force_settled_volume;
+    }
+
+    public boolean isPredictionMarket() {
+        return is_prediction_market;
+    }
+
+    public void setIsPredictionMarket(boolean is_prediction_market) {
+        this.is_prediction_market = is_prediction_market;
+    }
+
+    public Price getSettlementPrice() {
+        return settlement_price;
+    }
+
+    public void setSettlementPrice(Price settlementPrice) {
+        this.settlement_price = settlementPrice;
+    }
+
+    public long getSettlementFund() {
+        return settlement_fund;
+    }
+
+    public void setSettlementFund(long settlementFund) {
+        this.settlement_fund = settlementFund;
+    }
+
+    /**
+     * Custom deserializer used to instantiate the BitAssetData class from the response of the
+     * 'get_objects' API call.
+     */
+    public static class BitAssetDataDeserializer implements JsonDeserializer<BitAssetData> {
+
+        @Override
+        public BitAssetData deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            JsonObject jsonObject = json.getAsJsonObject();
+            String id = jsonObject.get(GrapheneObject.KEY_ID).getAsString();
+            BitAssetData bitAssetData = new BitAssetData(id);
+            ArrayList<ReportedAssetFeed> reportedAssetFeeds = new ArrayList<>();
+
+            JsonArray jsonAssetFeeds = jsonObject.get(KEY_FEEDS).getAsJsonArray();
+            for(JsonElement jsonFeed : jsonAssetFeeds){
+                ReportedAssetFeed reportedAssetFeed = context.deserialize(jsonFeed, ReportedAssetFeed.class);
+                reportedAssetFeeds.add(reportedAssetFeed);
+            }
+
+            // Deserializing attributes
+            JsonElement jsonCurrentFeed = jsonObject.get(KEY_CURRENT_FEED).getAsJsonObject();
+            AssetFeed assetFeed = context.deserialize(jsonCurrentFeed, AssetFeed.class);
+            String publicationTime = jsonObject.get(KEY_CURRENT_FEED_PUBLICATION_TIME).getAsString();
+            Options options = context.deserialize(jsonObject.get(KEY_OPERATIONS), Options.class);
+            long forceSettledVolume = jsonObject.get(KEY_FORCE_SETTLED_VOLUME).getAsLong();
+            boolean isPredictionMarket = jsonObject.get(KEY_IS_PREDICTION_MARKET).getAsBoolean();
+            Price settlementPrice = context.deserialize(jsonObject.get(KEY_SETTLEMENT_PRICE), Price.class);
+            long settlementFund = jsonObject.get(KEY_SETTLEMENT_FUND).getAsLong();
+
+            // Setting attributes
+            bitAssetData.setFeeds(reportedAssetFeeds.toArray(new ReportedAssetFeed[reportedAssetFeeds.size()]));
+            bitAssetData.setCurrentFeed(assetFeed);
+            bitAssetData.setCurrentFeedPublicationTime(publicationTime);
+            bitAssetData.setOptions(options);
+            bitAssetData.setForceSettledVolume(forceSettledVolume);
+            bitAssetData.setIsPredictionMarket(isPredictionMarket);
+            bitAssetData.setSettlementPrice(settlementPrice);
+            bitAssetData.setSettlementFund(settlementFund);
+            return bitAssetData;
+        }
+    }
 }

graphenej/src/main/java/cy/agorise/graphenej/models/BlockHeader.java

@@ -1,12 +1,11 @@
 package cy.agorise.graphenej.models;
 
 /**
- * Created by nelson on 12/13/16.
+ * Class used to represent the response to the 'get_block_header' API call.
  */
 public class BlockHeader {
     public String previous;
     public String timestamp;
     public String witness;
     public String transaction_merkle_root;
-    public Object[] extension;
 }

graphenej/src/main/java/cy/agorise/graphenej/models/FullAccountDetails.java

@@ -0,0 +1,68 @@
+package cy.agorise.graphenej.models;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+
+import java.lang.reflect.Type;
+
+/**
+ * Model class used in the de-serialization of the response to the 'get_full_accounts' API call.
+ * @see cy.agorise.graphenej.api.calls.GetFullAccounts
+ */
+public class FullAccountDetails {
+    private AccountProperties account;
+    private Statistics statistics;
+
+    public FullAccountDetails(AccountProperties properties, Statistics statistics){
+        this.account = properties;
+        this.statistics = statistics;
+    }
+
+    public AccountProperties getAccount() {
+        return account;
+    }
+
+    public void setAccount(AccountProperties account) {
+        this.account = account;
+    }
+
+    public Statistics getStatistics() {
+        return statistics;
+    }
+
+    public void setStatistics(Statistics statistics) {
+        this.statistics = statistics;
+    }
+
+    public static class Statistics {
+        public String id;
+        public String owner;
+        public String name;
+        public String most_recent_op;
+        public long total_ops;
+        public long removed_ops;
+        public long total_core_in_orders;
+        public String core_in_balance;
+        public boolean has_cashback_vb;
+        public boolean is_voting;
+        public long lifetime_fees_paid;
+        public long pending_fees;
+        public long pending_vested_fees;
+    }
+
+    public static class FullAccountDeserializer implements JsonDeserializer<FullAccountDetails> {
+
+        @Override
+        public FullAccountDetails deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            JsonArray array = (JsonArray) json;
+            JsonObject jsonObject = (JsonObject) array.get(1);
+            AccountProperties properties = context.deserialize(jsonObject.get("account"), AccountProperties.class);
+            Statistics statistics = context.deserialize(jsonObject.get("statistics"), Statistics.class);
+            return new FullAccountDetails(properties, statistics);
+        }
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/models/HistoricalTransfer.java

@@ -1,69 +0,0 @@
-package cy.agorise.graphenej.models;
-
-import cy.agorise.graphenej.operations.TransferOperation;
-
-
-/**
- * This class offers support to deserialization of transfer operations received by the API
- * method get_relative_account_history.
- *
- * More operations types might be listed in the response of that method, but by using this class
- * those will be filtered out of the parsed result.
- */
-public class HistoricalTransfer {
-    private String id;
-    private TransferOperation op;
-    public Object[] result;
-    private long block_num;
-    private long trx_in_block;
-    private long op_in_trx;
-    private long virtual_op;
-
-    public String getId() {
-        return id;
-    }
-
-    public void setId(String id) {
-        this.id = id;
-    }
-
-    public TransferOperation getOperation() {
-        return op;
-    }
-
-    public void setOperation(TransferOperation op) {
-        this.op = op;
-    }
-
-    public long getBlockNum() {
-        return block_num;
-    }
-
-    public void setBlockNum(long block_num) {
-        this.block_num = block_num;
-    }
-
-    public long getTransactionsInBlock() {
-        return trx_in_block;
-    }
-
-    public void setTransactionsInBlock(long trx_in_block) {
-        this.trx_in_block = trx_in_block;
-    }
-
-    public long getOperationsInTrx() {
-        return op_in_trx;
-    }
-
-    public void setOperationsInTrx(long op_in_trx) {
-        this.op_in_trx = op_in_trx;
-    }
-
-    public long getVirtualOp() {
-        return virtual_op;
-    }
-
-    public void setVirtualOp(long virtual_op) {
-        this.virtual_op = virtual_op;
-    }
-}

graphenej/src/main/java/cy/agorise/graphenej/models/HistoryOperationDetail.java

@@ -0,0 +1,28 @@
+package cy.agorise.graphenej.models;
+
+import java.util.List;
+
+/**
+ * Model class used to represent the struct defined in graphene::app::history_operation_detail and
+ * returned as response to the 'get_account_history_by_operations' API call.
+ */
+public class HistoryOperationDetail {
+    private long total_count;
+    List<OperationHistory> operation_history_objs;
+
+    public long getTotalCount() {
+        return total_count;
+    }
+
+    public void setTotalCount(long total_count) {
+        this.total_count = total_count;
+    }
+
+    public List<OperationHistory> getOperationHistoryObjs() {
+        return operation_history_objs;
+    }
+
+    public void setOperationHistoryObjs(List<OperationHistory> operation_history_objs) {
+        this.operation_history_objs = operation_history_objs;
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/models/JsonRpcNotification.java

@@ -0,0 +1,101 @@
+package cy.agorise.graphenej.models;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+
+import java.io.Serializable;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.GrapheneObject;
+import cy.agorise.graphenej.ObjectType;
+import cy.agorise.graphenej.OperationType;
+import cy.agorise.graphenej.Transaction;
+
+/**
+ * Class that represents a generic subscription notification.
+ * The template for every subscription response is the following:
+ *
+ *  {
+ *    "method": "notice"
+ *    "params": [
+ *      SUBSCRIPTION_ID,
+ *        [[
+ *          { "id": "2.1.0", ...  },
+ *          { "id": ...  },
+ *          { "id": ...  },
+ *          { "id": ...  }
+ *        ]]
+ *    ],
+ *  }
+ */
+public class JsonRpcNotification {
+    public static final String KEY_METHOD = "method";
+    public static final String KEY_PARAMS = "params";
+
+    public String method;
+    public List<Serializable> params;
+
+    /**
+     * Inner static class used to parse and deserialize subscription notifications.
+     */
+    public static class JsonRpcNotificationDeserializer implements JsonDeserializer<JsonRpcNotification> {
+
+        @Override
+        public JsonRpcNotification deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            JsonRpcNotification notification = new JsonRpcNotification();
+            JsonObject responseObject = json.getAsJsonObject();
+            if(!responseObject.has(KEY_METHOD)){
+                return notification;
+            }
+            notification.method = responseObject.get(KEY_METHOD).getAsString();
+
+            JsonArray paramsArray = responseObject.get(KEY_PARAMS).getAsJsonArray();
+            notification.params = new ArrayList<>();
+            notification.params.add(paramsArray.get(0).getAsInt());
+            ArrayList<Serializable> secondArgument = new ArrayList<>();
+            notification.params.add(secondArgument);
+
+            JsonArray subArray = paramsArray.get(1).getAsJsonArray().get(0).getAsJsonArray();
+            for(JsonElement object : subArray){
+                if(object.isJsonObject()){
+                    GrapheneObject grapheneObject = new GrapheneObject(object.getAsJsonObject().get(GrapheneObject.KEY_ID).getAsString());
+
+                    JsonObject jsonObject = object.getAsJsonObject();
+                    if(grapheneObject.getObjectType() == ObjectType.ACCOUNT_BALANCE_OBJECT){
+                        AccountBalanceUpdate balanceObject = new AccountBalanceUpdate(grapheneObject.getObjectId());
+                        balanceObject.owner = jsonObject.get(AccountBalanceUpdate.KEY_OWNER).getAsString();
+                        balanceObject.asset_type = jsonObject.get(AccountBalanceUpdate.KEY_ASSET_TYPE).getAsString();
+                        balanceObject.balance = jsonObject.get(AccountBalanceUpdate.KEY_BALANCE).getAsLong();
+                        secondArgument.add(balanceObject);
+                    }else if(grapheneObject.getObjectType() == ObjectType.DYNAMIC_GLOBAL_PROPERTY_OBJECT){
+                        DynamicGlobalProperties dynamicGlobalProperties = context.deserialize(object, DynamicGlobalProperties.class);
+                        secondArgument.add(dynamicGlobalProperties);
+                    }else if(grapheneObject.getObjectType() == ObjectType.TRANSACTION_OBJECT){
+                        BroadcastedTransaction broadcastedTransaction = new BroadcastedTransaction(grapheneObject.getObjectId());
+                        broadcastedTransaction.setTransaction((Transaction) context.deserialize(jsonObject.get(BroadcastedTransaction.KEY_TRX), Transaction.class));
+                        broadcastedTransaction.setTransactionId(jsonObject.get(BroadcastedTransaction.KEY_TRX_ID).getAsString());
+                        secondArgument.add(broadcastedTransaction);
+                    }else if(grapheneObject.getObjectType() == ObjectType.OPERATION_HISTORY_OBJECT){
+                        if(jsonObject.get(OperationHistory.KEY_OP).getAsJsonArray().get(0).getAsLong() == OperationType.TRANSFER_OPERATION.ordinal()){
+                            OperationHistory operationHistory = context.deserialize(jsonObject, OperationHistory.class);
+                            secondArgument.add(operationHistory);
+                        }else{
+                            //TODO: Add support for other operations
+                        }
+                    }else{
+                        //TODO: Add support for other types of objects
+                    }
+                }else{
+                    secondArgument.add(object.getAsString());
+                }
+            }
+            return notification;
+        }
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/models/JsonRpcResponse.java

@@ -0,0 +1,31 @@
+package cy.agorise.graphenej.models;
+
+/**
+ * Used to represent a JSON-RPC response object
+ */
+
+public class JsonRpcResponse<T> {
+    public long id;
+    public Error error;
+    public T result;
+
+    public static class Error {
+        public ErrorData data;
+        public int code;
+        public String message;
+        public Error(String message){
+            this.message = message;
+        }
+    }
+
+    public static class ErrorData {
+        public int code;
+        public String name;
+        public String message;
+        //TODO: Include stack data
+
+        public ErrorData(String message){
+            this.message = message;
+        }
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/models/OperationHistory.java

@@ -0,0 +1,136 @@
+package cy.agorise.graphenej.models;
+
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+
+import java.io.Serializable;
+import java.lang.reflect.Type;
+
+import cy.agorise.graphenej.BaseOperation;
+import cy.agorise.graphenej.GrapheneObject;
+
+
+/**
+ * This class offers support to deserialization of transfer operations received by the API
+ * method get_relative_account_history.
+ *
+ * More operations types might be listed in the response of that method, but by using this class
+ * those will be filtered out of the parsed result.
+ */
+public class OperationHistory extends GrapheneObject implements Serializable {
+    public static final String KEY_OP = "op";
+    public static final String KEY_BLOCK_NUM = "block_num";
+    public static final String KEY_TRX_IN_BLOCK = "trx_in_block";
+    public static final String KEY_OP_IN_TRX = "op_in_trx";
+    public static final String KEY_VIRTUAL_OP = "virtual_op";
+
+    private BaseOperation op;
+    public Object[] result;
+    private long block_num;
+    private long trx_in_block;
+    private long op_in_trx;
+    private long virtual_op;
+
+    public OperationHistory(String id) {
+        super(id);
+    }
+
+    public BaseOperation getOperation() {
+        return op;
+    }
+
+    public void setOperation(BaseOperation op) {
+        this.op = op;
+    }
+
+    public long getBlockNum() {
+        return block_num;
+    }
+
+    public void setBlockNum(long block_num) {
+        this.block_num = block_num;
+    }
+
+    public long getTransactionsInBlock() {
+        return trx_in_block;
+    }
+
+    public void setTransactionsInBlock(long trx_in_block) {
+        this.trx_in_block = trx_in_block;
+    }
+
+    public long getOperationsInTrx() {
+        return op_in_trx;
+    }
+
+    public void setOperationsInTrx(long op_in_trx) {
+        this.op_in_trx = op_in_trx;
+    }
+
+    public long getVirtualOp() {
+        return virtual_op;
+    }
+
+    public void setVirtualOp(long virtual_op) {
+        this.virtual_op = virtual_op;
+    }
+
+    /**
+     * Deserializer used to transform a an operation history object from its serialized form to an
+     * OperationHistory instance.
+     *
+     * The serialized form of this object is the following:
+     *
+     * {
+            "id": "1.11.178205535",
+            "op": [
+                14,
+                {
+                    "fee": {
+                        "amount": 10425,
+                        "asset_id": "1.3.0"
+                    },
+                     "issuer": "1.2.374566",
+                     "asset_to_issue": {
+                         "amount": 8387660,
+                         "asset_id": "1.3.3271"
+                    },
+                     "issue_to_account": "1.2.797835",
+                     "extensions": []
+                 }
+             ],
+             "result": [
+                 0,
+                 {}
+             ],
+             "block_num": 26473240,
+             "trx_in_block": 11,
+             "op_in_trx": 0,
+             "virtual_op": 660
+     }
+     * //TODO: Expand this deserializer for operation history objects that have an operation other than the transfer operation
+     */
+    public static class OperationHistoryDeserializer implements JsonDeserializer<OperationHistory> {
+
+        @Override
+        public OperationHistory deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            JsonObject jsonObject = json.getAsJsonObject();
+            String id = jsonObject.get(KEY_ID).getAsString();
+            long blockNum = jsonObject.get(KEY_BLOCK_NUM).getAsLong();
+            long trxInBlock = jsonObject.get(KEY_TRX_IN_BLOCK).getAsLong();
+            long opInTrx = jsonObject.get(KEY_OP_IN_TRX).getAsLong();
+            BaseOperation operation = context.deserialize(jsonObject.get(KEY_OP), BaseOperation.class);
+            long virtualOp = jsonObject.get(KEY_VIRTUAL_OP).getAsLong();
+            OperationHistory operationHistory = new OperationHistory(id);
+            operationHistory.setBlockNum(blockNum);
+            operationHistory.setTransactionsInBlock(trxInBlock);
+            operationHistory.setOperationsInTrx(opInTrx);
+            operationHistory.setOperation(operation);
+            operationHistory.setVirtualOp(virtualOp);
+            return operationHistory;
+        }
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/models/Options.java

@@ -0,0 +1,15 @@
+package cy.agorise.graphenej.models;
+
+/**
+ * Class used to represent the 'options' object returned inside the response obtained after
+ * querying for an object of type 'asset_bitasset_data' (2.4.x)
+ */
+
+public class Options {
+    private long feed_lifetime_sec;
+    private long minimum_feeds;
+    private long force_settlement_delay_sec;
+    private long force_settlement_offset_percent;
+    private long maximum_force_settlement_volume;
+    private String short_backing_asset;
+}

graphenej/src/main/java/cy/agorise/graphenej/models/ReportedAssetFeed.java

@@ -0,0 +1,78 @@
+package cy.agorise.graphenej.models;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParseException;
+
+import java.lang.reflect.Type;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.Util;
+
+/**
+ * Witness-provided asset price feed
+ */
+
+public class ReportedAssetFeed {
+    private UserAccount reporter;
+    private AssetFeed assetFeed;
+    private Date reportedDate;
+
+    public ReportedAssetFeed(UserAccount userAccount, Date date, AssetFeed assetFeed){
+        this.reporter = userAccount;
+        this.reportedDate = date;
+        this.assetFeed = assetFeed;
+    }
+
+    public UserAccount getReporter() {
+        return reporter;
+    }
+
+    public void setReporter(UserAccount reporter) {
+        this.reporter = reporter;
+    }
+
+    public AssetFeed getAssetFeed() {
+        return assetFeed;
+    }
+
+    public void setAssetFeed(AssetFeed assetFeed) {
+        this.assetFeed = assetFeed;
+    }
+
+    public Date getReportedDate() {
+        return reportedDate;
+    }
+
+    public void setReportedDate(Date reportedDate) {
+        this.reportedDate = reportedDate;
+    }
+
+    public static class ReportedAssetFeedDeserializer implements JsonDeserializer<ReportedAssetFeed> {
+
+        @Override
+        public ReportedAssetFeed deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            JsonArray array = json.getAsJsonArray();
+            String userId = array.get(0).getAsString();
+            JsonArray subArray = (JsonArray) array.get(1);
+            String dateString = subArray.get(0).getAsString();
+
+            SimpleDateFormat simpleDateFormat = new SimpleDateFormat(Util.TIME_DATE_FORMAT);
+            Date reportDate = null;
+            try {
+                reportDate = simpleDateFormat.parse(dateString);
+            } catch (ParseException e) {
+                e.printStackTrace();
+            }
+
+            AssetFeed assetFeed =  context.deserialize(subArray.get(1), AssetFeed.class);
+            UserAccount userAccount = new UserAccount(userId);
+            return new ReportedAssetFeed(userAccount, reportDate, assetFeed);
+        }
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/models/SubscriptionResponse.java

@@ -16,6 +16,7 @@ import java.util.List;
 
 import cy.agorise.graphenej.GrapheneObject;
 import cy.agorise.graphenej.ObjectType;
+import cy.agorise.graphenej.OperationType;
 import cy.agorise.graphenej.Transaction;
 import cy.agorise.graphenej.interfaces.SubscriptionListener;
 
@@ -43,15 +44,12 @@ import cy.agorise.graphenej.interfaces.SubscriptionListener;
  * To minimize CPU usage, we introduce a scheme of selective parsing, implemented by the static inner class
  * SubscriptionResponseDeserializer.
  *
- * Created by nelson on 1/12/17.
  */
 public class SubscriptionResponse {
-    private static final String TAG = "SubscriptionResponse";
     public static final String KEY_ID = "id";
     public static final String KEY_METHOD = "method";
     public static final String KEY_PARAMS = "params";
 
-    public int id;
     public String method;
     public List<Serializable> params;
 
@@ -182,6 +180,14 @@ public class SubscriptionResponse {
                             broadcastedTransaction.setTransactionId(jsonObject.get(BroadcastedTransaction.KEY_TRX_ID).getAsString());
                             objectMap.put(ObjectType.TRANSACTION_OBJECT, true);
                             secondArgument.add(broadcastedTransaction);
+                        }else if(grapheneObject.getObjectType() == ObjectType.OPERATION_HISTORY_OBJECT){
+                            if(jsonObject.get(OperationHistory.KEY_OP).getAsJsonArray().get(0).getAsLong() == OperationType.TRANSFER_OPERATION.ordinal()){
+                                OperationHistory operationHistory = context.deserialize(jsonObject, OperationHistory.class);
+                                objectMap.put(ObjectType.OPERATION_HISTORY_OBJECT, true);
+                                secondArgument.add(operationHistory);
+                            }else{
+                                //TODO: Add support for other operations
+                            }
                         }else{
                             //TODO: Add support for other types of objects
                         }

graphenej/src/main/java/cy/agorise/graphenej/models/WitnessResponse.java

@@ -2,6 +2,7 @@ package cy.agorise.graphenej.models;
 
 /**
  * Generic witness response
+ * @deprecated Use {@link JsonRpcResponse} instead
  */
 public class WitnessResponse<T> extends BaseResponse{
     public static final String KEY_ID = "id";

graphenej/src/main/java/cy/agorise/graphenej/network/FullNode.java

@@ -0,0 +1,121 @@
+package cy.agorise.graphenej.network;
+
+import cy.agorise.graphenej.stats.ExponentialMovingAverage;
+
+/**
+ * Class that represents a full node and is used to keep track of its round-trip time measured in milliseconds.
+ */
+public class FullNode implements Comparable {
+
+    private String mUrl;
+    private ExponentialMovingAverage mLatency;
+    private boolean isConnected;
+    private boolean isRemoved;
+
+    private FullNode(){}
+
+    /**
+     * Constructor used to specify both the node URL and the alpha parameter that one wishes to set the
+     * exponential moving average with.
+     * <p>
+     * The alpha parameter represents the degree of weighting decrease, and can be specified as any value
+     * between 0 and 1. A higher alpha discounts older observations faster.
+     *
+     * @param url       The node URL.
+     * @param alpha     The alpha parameter used to compute the exponential moving average.
+     */
+    public FullNode(String url, double alpha){
+        mLatency = new ExponentialMovingAverage(alpha);
+        mUrl = url;
+    }
+
+    /**
+     * Constructor used to specify only the node URL.
+     * <p>
+     * The alpha parameter is set to the value specified at {@link ExponentialMovingAverage#DEFAULT_ALPHA}
+     *
+     * @param url   The node URL.
+     */
+    public FullNode(String url){
+        this(url, ExponentialMovingAverage.DEFAULT_ALPHA);
+    }
+
+    /**
+     * Full node URL getter
+     * @return
+     */
+    public String getUrl() {
+        return mUrl;
+    }
+
+    /**
+     * Full node URL setter
+     * @param mUrl
+     */
+    public void setUrl(String mUrl) {
+        this.mUrl = mUrl;
+    }
+
+    /**
+     *
+     * @return  The latest latency average value. If no measurement has been taken yet, the
+     * maximum allows value of a long primitive, or 2<sup>63</sup>-1 will be returned.
+     */
+    public double getLatencyValue() {
+        double average = mLatency.getAverage();
+        if(average == 0){
+            return Long.MAX_VALUE;
+        }else{
+            return average;
+        }
+    }
+
+    public boolean isConnected() {
+        return isConnected;
+    }
+
+    public void setConnected(boolean connected) {
+        isConnected = connected;
+    }
+
+    public boolean isRemoved() {
+        return isRemoved;
+    }
+
+    public void setRemoved(boolean removed) {
+        isRemoved = removed;
+    }
+
+    /**
+     * Method that updates the mLatency average with a new value.
+     * @param latency   Most recent mLatency sample to be added to the exponential average
+     */
+    public void addLatencyValue(double latency) {
+        this.mLatency.updateValue(latency);
+    }
+
+    @Override
+    public int compareTo(Object o) {
+        FullNode node = (FullNode) o;
+        double doubleResult = getLatencyValue() - node.getLatencyValue();
+        if(doubleResult > 0)
+            return 1;
+        else if(doubleResult < 0)
+            return -1;
+        else
+            return 0;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        FullNode fullNode = (FullNode) o;
+        return mUrl.equals(fullNode.getUrl());
+    }
+
+    @Override
+    public int hashCode() {
+        return mUrl.hashCode();
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/network/LatencyNodeProvider.java

@@ -0,0 +1,65 @@
+package cy.agorise.graphenej.network;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.PriorityBlockingQueue;
+
+public class LatencyNodeProvider implements NodeProvider {
+
+    private PriorityBlockingQueue<FullNode> mFullNodeHeap;
+
+    public LatencyNodeProvider(){
+        mFullNodeHeap = new PriorityBlockingQueue<>();
+    }
+
+    @Override
+    public FullNode getBestNode() {
+        return mFullNodeHeap.peek();
+    }
+
+    @Override
+    public void addNode(FullNode fullNode) {
+        mFullNodeHeap.add(fullNode);
+    }
+
+    @Override
+    public boolean updateNode(FullNode fullNode) {
+        mFullNodeHeap.remove(fullNode);
+        return mFullNodeHeap.offer(fullNode);
+    }
+
+    /**
+     * Updates an existing node with the new latency value.
+     *
+     * @param fullNode  Existing full node instance
+     * @param latency   New latency measurement
+     * @return          True if the node priority was updated successfully
+     */
+    public boolean updateNode(FullNode fullNode, int latency){
+        boolean existed = mFullNodeHeap.remove(fullNode);
+        if(existed){
+            fullNode.addLatencyValue(latency);
+            return mFullNodeHeap.add(fullNode);
+        }
+        return false;
+    }
+
+    @Override
+    public void removeNode(FullNode fullNode) {
+        mFullNodeHeap.remove(fullNode);
+    }
+
+    @Override
+    public List<FullNode> getSortedNodes() {
+        FullNode[] nodeArray = mFullNodeHeap.toArray(new FullNode[mFullNodeHeap.size()]);
+        ArrayList<FullNode> nodeList = new ArrayList<>();
+        for(FullNode fullNode : nodeArray){
+            if(fullNode != null){
+                nodeList.add(fullNode);
+            }
+        }
+        Collections.sort(nodeList);
+        return nodeList;
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/network/NodeLatencyVerifier.java

@@ -0,0 +1,210 @@
+package cy.agorise.graphenej.network;
+
+import android.os.Handler;
+import android.os.Looper;
+import android.util.Log;
+
+import java.util.HashMap;
+import java.util.List;
+
+import cy.agorise.graphenej.api.android.NetworkService;
+import io.reactivex.subjects.PublishSubject;
+import okhttp3.HttpUrl;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+import okhttp3.WebSocket;
+import okhttp3.WebSocketListener;
+
+/**
+ * Class that encapsulates the node latency verification task
+ */
+public class NodeLatencyVerifier {
+    private final String TAG = this.getClass().getName();
+
+    private static final int DEFAULT_LATENCY_VERIFICATION_PERIOD = 5 * 1000;
+
+    // Variable used to store the list of nodes that should be verified
+    private List<FullNode> mNodeList;
+
+    // Variable used to store the desired verification period
+    private long verificationPeriod;
+
+    // Subject used to publish the result to interested parties
+    private PublishSubject<FullNode> subject = PublishSubject.create();
+
+    private HashMap<HttpUrl, FullNode> nodeURLMap = new HashMap<>();
+
+    // Map used to store the first timestamp required for a RTT (Round Trip Time) measurement.
+    // If:
+    //      RTT = t2 - t1
+    // This map will hold the value of t1 for each one of the nodes to be measured.
+    private HashMap<FullNode, Long> timestamps = new HashMap<>();
+
+    private HashMap<String, Request> requestMap = new HashMap<>();
+
+    private Handler mHandler = new Handler(Looper.getMainLooper());
+
+    private OkHttpClient client;
+
+    public NodeLatencyVerifier(List<FullNode> nodes){
+        this(nodes, DEFAULT_LATENCY_VERIFICATION_PERIOD);
+    }
+
+    public NodeLatencyVerifier(List<FullNode> nodes, long period){
+        mNodeList = nodes;
+        verificationPeriod = period;
+    }
+
+    /**
+     * Method used to start the latency verification task.
+     * <p>
+     * The returning object can be used for interested parties to receive constant updates
+     * regarding new latency measurements for every full node.
+     * </p>
+     * @return  A {@link PublishSubject} class instance.
+     */
+    public PublishSubject start(){
+        mHandler.post(mVerificationTask);
+        return subject;
+    }
+
+    /**
+     * Method used to cancel the verification task.
+     */
+    public void stop(){
+        mHandler.removeCallbacks(mVerificationTask);
+    }
+
+    /**
+     * Node latency verification task.
+     */
+    private final Runnable mVerificationTask = new Runnable() {
+        @Override
+        public void run() {
+            for(FullNode fullNode : mNodeList){
+                long before = System.currentTimeMillis();
+                timestamps.put(fullNode, before);
+
+                // We want to reuse the same OkHttpClient instance if possible
+                if(client == null) client = new OkHttpClient();
+
+                // Same thing with the Request instance, we want to reuse them. But since
+                // we might have one request per node, we keep them in a map.
+                Request request;
+                if(requestMap.containsKey(fullNode.getUrl())){
+                    request = requestMap.get(fullNode.getUrl());
+                }else{
+                    // If the map had no entry for the request we want, we create one
+                    // and add it to the map.
+                    request = new Request.Builder().url(fullNode.getUrl()).build();
+                    requestMap.put(fullNode.getUrl(), request);
+                }
+
+                String normalURL = fullNode.getUrl().replace("wss://", "https://");
+                HttpUrl key = HttpUrl.parse(normalURL);
+                if(!nodeURLMap.containsKey(key)){
+                    nodeURLMap.put(key, fullNode);
+                }
+                client.newWebSocket(request, mWebSocketListener);
+            }
+            mHandler.postDelayed(this, verificationPeriod);
+        }
+    };
+
+    /**
+     * Listener that will be called upon a server response.
+     */
+    private WebSocketListener mWebSocketListener = new WebSocketListener() {
+        @Override
+        public void onOpen(WebSocket webSocket, Response response) {
+            super.onOpen(webSocket, response);
+            handleResponse(webSocket, response);
+        }
+
+        @Override
+        public void onFailure(WebSocket webSocket, Throwable t, Response response) {
+            super.onFailure(webSocket, t, response);
+            handleResponse(webSocket, response);
+        }
+
+        /**
+         * Method used to handle the node's first response. The idea here is to obtain
+         * the RTT (Round Trip Time) measurement and publish it using the PublishSubject.
+         *
+         * @param webSocket WebSocket instance
+         * @param response  Response instance
+         */
+        private void handleResponse(WebSocket webSocket, Response response){
+            synchronized (this){
+                // Obtaining the HttpUrl instance that was previously used as a key
+                HttpUrl url = webSocket.request().url();
+                if(nodeURLMap.containsKey(url)){
+                    FullNode fullNode = nodeURLMap.get(url);
+                    long delay;
+
+                    if(response == null) {
+                        // There is no internet connection, or the node is unreachable. We are just
+                        // putting an artificial delay.
+                        delay = Long.MAX_VALUE;
+                    } else {
+                        long after = System.currentTimeMillis();
+                        long before = timestamps.get(fullNode);
+                        delay = after - before;
+                    }
+                    if(fullNode != null){
+                        fullNode.addLatencyValue(delay);
+                        subject.onNext(fullNode);
+                    }else{
+                        Log.w(TAG,"Could not extract FullNode instance from the map");
+                    }
+                }else{
+                    // We cannot properly handle a response to a request whose
+                    // URL was not registered at the nodeURLMap. This is because without this,
+                    // we cannot know to which node this response corresponds. This should not happen.
+                    Log.e(TAG,"nodeURLMap does not contain url: "+url);
+                    for(HttpUrl key : nodeURLMap.keySet()){
+                        Log.e(TAG,"> "+key);
+                    }
+                }
+                webSocket.close(NetworkService.NORMAL_CLOSURE_STATUS, null);
+            }
+        }
+    };
+
+    /**
+     * Updates the 'isConnected' attribute of a specific node.
+     * @param fullNode  The node we want to update.
+     */
+    public void updateActiveNodeInformation(FullNode fullNode){
+        for(FullNode node : mNodeList){
+            if(node.equals(fullNode)){
+                node.setConnected(fullNode.isConnected());
+            }
+        }
+    }
+
+    /**
+     * Removes the given node from the nodes list
+     * @param fullNode The node to remove
+     */
+    public void removeNode(FullNode fullNode){
+        for(FullNode node : mNodeList){
+            if(node.equals(fullNode)){
+                mNodeList.remove(node);
+
+                String normalURL = node.getUrl().replace("wss://", "https://");
+                HttpUrl key = HttpUrl.parse(normalURL);
+                nodeURLMap.remove(key);
+
+                node.setRemoved(true);
+                subject.onNext(node);
+                break;
+            }
+        }
+    }
+
+    public List<FullNode> getNodeList(){
+        return mNodeList;
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/network/NodeProvider.java

@@ -0,0 +1,44 @@
+package cy.agorise.graphenej.network;
+
+import java.util.List;
+
+/**
+ * Interface used to describe the high level characteristics of a class that will
+ * hold and manage a list of {@link FullNode} instances.
+ *
+ * The idea is that the class implementing this interface should provide node instances
+ * and thus URLs for the {@link cy.agorise.graphenej.api.android.NetworkService} with
+ * different sorting heuristics.
+ */
+public interface NodeProvider {
+
+    /**
+     * Returns the node with the best characteristics. Returns null if there is no {@link FullNode}
+     * @return          A FullNode instance
+     */
+    FullNode getBestNode();
+
+    /**
+     * Adds a new node to the queue
+     * @param fullNode  {@link FullNode} instance to add.
+     */
+    void addNode(FullNode fullNode);
+
+    /**
+     * Updates the rating of a specific node that is already in the NodeProvider
+     * @param fullNode The node tu update
+     */
+    boolean updateNode(FullNode fullNode);
+
+    /**
+     * Removes the given node from the nodes list
+     * @param fullNode The node to remove
+     */
+    void removeNode(FullNode fullNode);
+
+    /**
+     * Returns an ordered list of {@link FullNode} instances.
+     * @return The sorted list of nodes.
+     */
+    List<FullNode> getSortedNodes();
+}

graphenej/src/main/java/cy/agorise/graphenej/operations/AccountUpgradeOperation.java

@@ -0,0 +1,145 @@
+package cy.agorise.graphenej.operations;
+
+import com.google.common.primitives.Bytes;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+
+import java.lang.reflect.Type;
+
+import cy.agorise.graphenej.AssetAmount;
+import cy.agorise.graphenej.BaseOperation;
+import cy.agorise.graphenej.OperationType;
+import cy.agorise.graphenej.UserAccount;
+
+/**
+ * Created by henry on 19/5/2018.
+ */
+
+public class AccountUpgradeOperation extends BaseOperation {
+
+    private static final String KEY_ACCOUNT = "account_to_upgrade";
+    private static final String KEY_UPGRADE = "upgrade_to_lifetime_member";
+
+    private AssetAmount fee;
+    private UserAccount accountToUpgrade;
+    private boolean upgradeToLifeTimeMember;
+
+    public AccountUpgradeOperation(UserAccount accountToUpgrade, boolean upgradeToLifeTimeMember) {
+        super(OperationType.ACCOUNT_UPGRADE_OPERATION);
+        this.accountToUpgrade = accountToUpgrade;
+        this.upgradeToLifeTimeMember = upgradeToLifeTimeMember;
+    }
+
+    public AccountUpgradeOperation(UserAccount accountToUpgrade, boolean upgradeToLifeTimeMember, AssetAmount fee) {
+        super(OperationType.ACCOUNT_UPGRADE_OPERATION);
+        this.accountToUpgrade = accountToUpgrade;
+        this.upgradeToLifeTimeMember = upgradeToLifeTimeMember;
+        this.fee = fee;
+    }
+
+    public AssetAmount getFee() {
+        return fee;
+    }
+
+    public UserAccount getAccountToUpgrade() {
+        return accountToUpgrade;
+    }
+
+    public void setAccountToUpgrade(UserAccount accountToUpgrade) {
+        this.accountToUpgrade = accountToUpgrade;
+    }
+
+    public boolean isUpgradeToLifeTimeMember() {
+        return upgradeToLifeTimeMember;
+    }
+
+    public void setUpgradeToLifeTimeMember(boolean upgradeToLifeTimeMember) {
+        this.upgradeToLifeTimeMember = upgradeToLifeTimeMember;
+    }
+
+    @Override
+    public void setFee(AssetAmount assetAmount) {
+        this.fee = assetAmount;
+    }
+
+    @Override
+    public byte[] toBytes() {
+        byte[] feeBytes = fee.toBytes();
+        byte[] accountBytes = accountToUpgrade.toBytes();
+        byte[] upgradeToLifeTimeMemberBytes = this.upgradeToLifeTimeMember ? new byte[]{ 0x1 } : new byte[]{ 0x0 };
+        byte[] extensions = this.extensions.toBytes();
+        return Bytes.concat(feeBytes, accountBytes, upgradeToLifeTimeMemberBytes, extensions);
+    }
+
+    @Override
+    public String toJsonString() {
+        GsonBuilder gsonBuilder = new GsonBuilder();
+        gsonBuilder.registerTypeAdapter(AccountUpgradeOperation.class, new AccountUpgradeSerializer());
+        return gsonBuilder.create().toJson(this);
+    }
+
+    @Override
+    public JsonElement toJsonObject() {
+        JsonArray array = new JsonArray();
+        array.add(this.getId());
+        JsonObject jsonObject = new JsonObject();
+        if(fee != null)
+            jsonObject.add(KEY_FEE, fee.toJsonObject());
+        jsonObject.addProperty(KEY_ACCOUNT, accountToUpgrade.getObjectId());
+        jsonObject.addProperty(KEY_UPGRADE, this.upgradeToLifeTimeMember ? "true" : "false");
+        jsonObject.add(KEY_EXTENSIONS, new JsonArray());
+        array.add(jsonObject);
+        return array;
+    }
+
+    public static class AccountUpgradeSerializer implements JsonSerializer<AccountUpgradeOperation> {
+
+        @Override
+        public JsonElement serialize(AccountUpgradeOperation accountUpgrade, Type type, JsonSerializationContext jsonSerializationContext) {
+            return accountUpgrade.toJsonObject();
+        }
+    }
+
+
+    public static class AccountUpgradeDeserializer implements JsonDeserializer<AccountUpgradeOperation> {
+
+        @Override
+        public AccountUpgradeOperation deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+            if(json.isJsonArray()){
+                // This block is used just to check if we are in the first step of the deserialization
+                // when we are dealing with an array.
+                JsonArray serializedAccountUpgrade = json.getAsJsonArray();
+                if(serializedAccountUpgrade.get(0).getAsInt() != OperationType.ACCOUNT_UPGRADE_OPERATION.ordinal()){
+                    // If the operation type does not correspond to a transfer operation, we return null
+                    return null;
+                }else{
+                    // Calling itself recursively, this is only done once, so there will be no problems.
+                    return context.deserialize(serializedAccountUpgrade.get(1), AccountUpgradeOperation.class);
+                }
+            }else{
+                JsonObject jsonObject = json.getAsJsonObject();
+
+                // Deserializing AssetAmount objects
+                AssetAmount fee = context.deserialize(jsonObject.get(KEY_FEE), AssetAmount.class);
+
+                // Deserializing UserAccount objects
+                UserAccount accountToUpgrade = new UserAccount(jsonObject.get(KEY_ACCOUNT).getAsString());
+
+                boolean upgradeToLifeTime = jsonObject.get(KEY_UPGRADE).getAsBoolean();
+                AccountUpgradeOperation upgrade = new AccountUpgradeOperation(accountToUpgrade, upgradeToLifeTime, fee);
+
+                return upgrade;
+            }
+        }
+    }
+
+
+}
+

graphenej/src/main/java/cy/agorise/graphenej/operations/AccountUpgradeOperationBuilder.java

@@ -0,0 +1,46 @@
+package cy.agorise.graphenej.operations;
+
+import cy.agorise.graphenej.AssetAmount;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.errors.MalformedOperationException;
+
+/**
+ * Created by henry on 19/5/2018.
+ */
+
+public class AccountUpgradeOperationBuilder extends BaseOperationBuilder {
+
+    private UserAccount accountToUpgrade;
+    private AssetAmount fee;
+    private boolean isUpgrade = true;
+
+    public AccountUpgradeOperationBuilder setAccountToUpgrade(UserAccount accountToUpgrade) {
+        this.accountToUpgrade = accountToUpgrade;
+        return this;
+    }
+
+    public AccountUpgradeOperationBuilder setFee(AssetAmount fee) {
+        this.fee = fee;
+        return this;
+    }
+
+    public AccountUpgradeOperationBuilder setIsUpgrade(Boolean isUpgrade) {
+        this.isUpgrade = isUpgrade;
+        return this;
+    }
+
+    @Override
+    public AccountUpgradeOperation build(){
+        AccountUpgradeOperation accountUpgrade;
+        if(accountToUpgrade == null ){
+            throw new MalformedOperationException("Missing account to upgrade information");
+        }
+
+        if(fee != null){
+            accountUpgrade = new AccountUpgradeOperation(accountToUpgrade, isUpgrade, fee);
+        }else{
+            accountUpgrade = new AccountUpgradeOperation(accountToUpgrade, isUpgrade);
+        }
+        return accountUpgrade;
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/operations/CreateHtlcOperation.java

@@ -0,0 +1,146 @@
+package cy.agorise.graphenej.operations;
+
+import com.google.common.primitives.Bytes;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import cy.agorise.graphenej.AssetAmount;
+import cy.agorise.graphenej.BaseOperation;
+import cy.agorise.graphenej.HtlcHash;
+import cy.agorise.graphenej.OperationType;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.Util;
+
+public class CreateHtlcOperation extends BaseOperation {
+    static final String KEY_FROM = "from";
+    static final String KEY_TO = "to";
+    static final String KEY_AMOUNT = "amount";
+    static final String KEY_PREIMAGE_HASH = "preimage_hash";
+    static final String KEY_PREIMAGE_SIZE = "preimage_size";
+    static final String KEY_CLAIM_PERIOD_SECONDS = "claim_period_seconds";
+
+    private AssetAmount fee;
+    private UserAccount from;
+    private UserAccount to;
+    private AssetAmount amount;
+    private HtlcHash preimageHash;
+    private short preimageSize;
+    private int claimPeriodSeconds;
+
+    /**
+     * Public constructor
+     *
+     * @param fee The operation fee.
+     * @param from The source account.
+     * @param to The destination account.
+     * @param amount The amount to be traded.
+     * @param hash The pre-image hash.
+     * @param preimageSize The pre-image size.
+     * @param claimPeriodSeconds The claim period, in seconds.
+     */
+    public CreateHtlcOperation(AssetAmount fee, UserAccount from, UserAccount to, AssetAmount amount, HtlcHash hash, short preimageSize, int claimPeriodSeconds) {
+        super(OperationType.HTLC_CREATE_OPERATION);
+        this.fee = fee;
+        this.from = from;
+        this.to = to;
+        this.amount = amount;
+        this.preimageHash = hash;
+        this.preimageSize = preimageSize;
+        this.claimPeriodSeconds = claimPeriodSeconds;
+    }
+
+    @Override
+    public void setFee(AssetAmount newFee){
+        this.fee = newFee;
+    }
+
+    public AssetAmount getFee() {
+        return fee;
+    }
+
+    public UserAccount getFrom() {
+        return from;
+    }
+
+    public void setFrom(UserAccount from) {
+        this.from = from;
+    }
+
+    public UserAccount getTo() {
+        return to;
+    }
+
+    public void setTo(UserAccount to) {
+        this.to = to;
+    }
+
+    public AssetAmount getAmount() {
+        return amount;
+    }
+
+    public void setAmount(AssetAmount amount) {
+        this.amount = amount;
+    }
+
+    public HtlcHash getPreimageHash() {
+        return preimageHash;
+    }
+
+    public void setPreimageHash(HtlcHash preimageHash) {
+        this.preimageHash = preimageHash;
+    }
+
+    public short getPreimageSize() {
+        return preimageSize;
+    }
+
+    public void setPreimageSize(short preimageSize) {
+        this.preimageSize = preimageSize;
+    }
+
+    public int getClaimPeriodSeconds() {
+        return claimPeriodSeconds;
+    }
+
+    public void setClaimPeriodSeconds(int claimPeriodSeconds) {
+        this.claimPeriodSeconds = claimPeriodSeconds;
+    }
+
+    @Override
+    public byte[] toBytes() {
+        byte[] feeBytes = fee.toBytes();
+        byte[] fromBytes = from.toBytes();
+        byte[] toBytes = to.toBytes();
+        byte[] amountBytes = amount.toBytes();
+        byte[] htlcHashBytes = preimageHash.toBytes();
+        byte[] preimageSizeBytes = Util.revertShort(preimageSize);
+        byte[] claimPeriodBytes = Util.revertInteger(claimPeriodSeconds);
+        byte[] extensionsBytes = extensions.toBytes();
+        return Bytes.concat(feeBytes, fromBytes, toBytes, amountBytes, htlcHashBytes, preimageSizeBytes, claimPeriodBytes, extensionsBytes);
+    }
+
+    @Override
+    public JsonElement toJsonObject() {
+        JsonArray array = new JsonArray();
+        array.add(this.getId());
+        JsonObject jsonObject = new JsonObject();
+        jsonObject.add(KEY_FEE, fee.toJsonObject());
+        jsonObject.addProperty(KEY_FROM, from.getObjectId());
+        jsonObject.addProperty(KEY_TO, to.getObjectId());
+        jsonObject.add(KEY_AMOUNT, amount.toJsonObject());
+        jsonObject.add(KEY_PREIMAGE_HASH, preimageHash.toJsonObject());
+        jsonObject.addProperty(KEY_PREIMAGE_SIZE, preimageSize);
+        jsonObject.addProperty(KEY_CLAIM_PERIOD_SECONDS, claimPeriodSeconds);
+        jsonObject.add(KEY_EXTENSIONS, new JsonArray());
+        array.add(jsonObject);
+        return array;
+    }
+
+    @Override
+    public String toJsonString() {
+        GsonBuilder gsonBuilder = new GsonBuilder();
+        return gsonBuilder.create().toJson(this);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/operations/RedeemHtlcOperation.java

@@ -0,0 +1,111 @@
+package cy.agorise.graphenej.operations;
+
+import com.google.common.primitives.Bytes;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+import cy.agorise.graphenej.AssetAmount;
+import cy.agorise.graphenej.BaseOperation;
+import cy.agorise.graphenej.Htlc;
+import cy.agorise.graphenej.OperationType;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.Util;
+import cy.agorise.graphenej.Varint;
+
+/**
+ * Class used to encapsulate the redeem_htlc operation.
+ */
+public class RedeemHtlcOperation extends BaseOperation {
+    static final String KEY_REDEEMER = "redeemer";
+    static final String KEY_PREIMAGE = "preimage";
+    static final String KEY_HTLC_ID = "htlc_id";
+
+    private AssetAmount fee;
+    private UserAccount redeemer;
+    private Htlc htlc;
+    private byte[] preimage;
+
+    /**
+     * Public constructor
+     *
+     * @param fee   The fee associated with this operation.
+     * @param redeemer  The user account that will redeem the HTLC.
+     * @param htlc    The existing HTLC operation.
+     */
+    public RedeemHtlcOperation(AssetAmount fee, UserAccount redeemer, Htlc htlc, byte[] preimage) {
+        super(OperationType.HTLC_REDEEM_OPERATION);
+        this.fee = fee;
+        this.redeemer = redeemer;
+        this.htlc = htlc;
+        this.preimage = preimage;
+    }
+
+    @Override
+    public void setFee(AssetAmount fee) {
+        this.fee = fee;
+    }
+
+    public AssetAmount getFee(){
+        return this.fee;
+    }
+
+    public UserAccount getRedeemer() {
+        return redeemer;
+    }
+
+    public void setRedeemer(UserAccount redeemer) {
+        this.redeemer = redeemer;
+    }
+
+    public Htlc getHtlc() {
+        return htlc;
+    }
+
+    public void setHtlc(Htlc htlc) {
+        this.htlc = htlc;
+    }
+
+    @Override
+    public byte[] toBytes() {
+        byte[] feeBytes = this.fee.toBytes();
+        byte[] htlcBytes = this.htlc.toBytes();
+        byte[] redeemerBytes = this.redeemer.toBytes();
+        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+        DataOutput out = new DataOutputStream(byteArrayOutputStream);
+        try{
+            Varint.writeUnsignedVarLong(this.preimage.length, out);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        byte[] preimageLength = byteArrayOutputStream.toByteArray();
+        byte[] extensionsBytes = extensions.toBytes();
+        return Bytes.concat(feeBytes, htlcBytes, redeemerBytes, preimageLength, this.preimage, extensionsBytes);
+    }
+
+    @Override
+    public JsonElement toJsonObject() {
+        JsonArray array = new JsonArray();
+        array.add(this.getId());
+        JsonObject jsonObject = new JsonObject();
+        jsonObject.add(KEY_FEE, fee.toJsonObject());
+        jsonObject.addProperty(KEY_REDEEMER, this.redeemer.getObjectId());
+        jsonObject.addProperty(KEY_PREIMAGE, Util.bytesToHex(this.preimage));
+        jsonObject.addProperty(KEY_HTLC_ID, this.htlc.getObjectId());
+        jsonObject.add(KEY_EXTENSIONS, new JsonArray());
+        array.add(jsonObject);
+        return array;
+    }
+
+    @Override
+    public String toJsonString() {
+        GsonBuilder gsonBuilder = new GsonBuilder();
+        return gsonBuilder.create().toJson(this);
+    }
+}

graphenej/src/main/java/cy/agorise/graphenej/operations/TransferOperation.java

@@ -17,7 +17,7 @@ import cy.agorise.graphenej.AssetAmount;
 import cy.agorise.graphenej.BaseOperation;
 import cy.agorise.graphenej.OperationType;
 import cy.agorise.graphenej.UserAccount;
-import cy.agorise.graphenej.objects.Memo;
+import cy.agorise.graphenej.Memo;
 
 /**
  * Class used to encapsulate the TransferOperation operation related functionalities.

graphenej/src/main/java/cy/agorise/graphenej/operations/TransferOperationBuilder.java

@@ -3,7 +3,7 @@ package cy.agorise.graphenej.operations;
 import cy.agorise.graphenej.AssetAmount;
 import cy.agorise.graphenej.UserAccount;
 import cy.agorise.graphenej.errors.MalformedOperationException;
-import cy.agorise.graphenej.objects.Memo;
+import cy.agorise.graphenej.Memo;
 
 /**
  * Factory class used to build a transfer operation

graphenej/src/main/java/cy/agorise/graphenej/stats/ExponentialMovingAverage.java

@@ -0,0 +1,49 @@
+package cy.agorise.graphenej.stats;
+
+/**
+ * Class used to compute the Exponential Moving Average of a sequence of values.
+ * For more details see <a href="https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average">here</a>.
+ */
+public class ExponentialMovingAverage {
+    public static final double DEFAULT_ALPHA = 0.5;
+    private double alpha;
+    private Double accumulatedValue;
+
+    /**
+     * Constructor, which takes only the alpha parameter as an argument.
+     *
+     * @param alpha The coefficient alpha represents the degree of weighting decrease, a constant
+     *              smoothing factor between 0 and 1. A higher alpha discounts older observations faster.
+     */
+    public ExponentialMovingAverage(double alpha) {
+        this.alpha = alpha;
+    }
+
+    /**
+     * Method that updates the average with a new sample
+     * @param value New value
+     * @return      The updated average value
+     */
+    public double updateValue(double value) {
+        if (accumulatedValue == null) {
+            accumulatedValue = value;
+            return value;
+        }
+        double newValue = accumulatedValue + alpha * (value - accumulatedValue);
+        accumulatedValue = newValue;
+        return newValue;
+    }
+
+    /**
+     *
+     * @return  Returns the current average value
+     */
+    public double getAverage(){
+        return accumulatedValue == null ? 0 : accumulatedValue;
+    }
+
+    public void setAlpha(double alpha){
+        this.alpha = alpha;
+        this.accumulatedValue = null;
+    }
+}

graphenej/src/test/java/cy/agorise/graphenej/AuthorityTest.java

@@ -7,6 +7,7 @@ import org.junit.Test;
 import java.util.HashMap;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
 
 /**
  * Created by nelson on 12/16/16.
@@ -48,7 +49,7 @@ public class AuthorityTest {
     @Test
     public void equals() throws Exception {
         assertEquals("Equal authorities", authority, sameAuthority);
-        assertEquals("Different authorities ", authority, differentAuthority);
+        assertNotEquals("Different authorities ", authority, differentAuthority);
         assertEquals("Two public keys with the same public key should be equal", keyAuthority1, keyAuthority2);
     }
 

graphenej/src/test/java/cy/agorise/graphenej/BrainKeyTest.java

@@ -10,6 +10,9 @@ import org.junit.Test;
  */
 public class BrainKeyTest {
     public final String TEST_BRAINKEY = "BARIC BICKERN LITZ TIPFUL JINGLED POOL TUMBAK PURIST APOPYLE DURAIN SATLIJK FAUCAL";
+
+    public final String TEST_BRAINKEY_OPENLEDGER = "ona refan abscise neebor battik terbia bandit sundra gasser debar phytol frat hauler accede primy garland";
+
     private BrainKey mBrainKey;
 
     @Before
@@ -17,6 +20,9 @@ public class BrainKeyTest {
         mBrainKey = new BrainKey(TEST_BRAINKEY, BrainKey.DEFAULT_SEQUENCE_NUMBER);
     }
 
+    /**
+     * Test making sure that a simple brainkey can successfully generate the expected public address
+     */
     @Test
     public void testAddress(){
         Address address = mBrainKey.getPublicAddress(Address.BITSHARES_PREFIX);
@@ -24,4 +30,25 @@ public class BrainKeyTest {
                 "BTS61UqqgE3ARuTGcckzARsdQm4EMFdBEwYyi1pbwyHrZZWrCDhT2",
                 address.toString());
     }
+
+    /**
+     * Test making sure that a OpenLedger's brainkey can successfully generate the given
+     * 'owner' and 'active' keys.
+     */
+    @Test
+    public void testOpenledgerAddress(){
+        BrainKey brainKey1 = new BrainKey(TEST_BRAINKEY_OPENLEDGER, 0);
+        BrainKey brainKey2 = new BrainKey(TEST_BRAINKEY_OPENLEDGER, 1);
+
+        Address ownerAddress = brainKey1.getPublicAddress(Address.BITSHARES_PREFIX);
+        Address activeAddress = brainKey2.getPublicAddress(Address.BITSHARES_PREFIX);
+
+        Assert.assertEquals("Owner address matches",
+                "BTS6dqT3J7tUcZP6xHo2mHkL8tq8zw5TQgGd6ntRMXH1EoNsCWTzm",
+                ownerAddress.toString());
+
+        Assert.assertEquals("Active address matches",
+                "BTS6DKvgY3yPyN7wKrhBGYhrnghhLSVCYz3ugUdi9pDPkicS6B7N2",
+                activeAddress.toString());
+    }
 }

graphenej/src/test/java/cy/agorise/graphenej/HtlcTest.java

@@ -0,0 +1,26 @@
+package cy.agorise.graphenej;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class HtlcTest {
+    private final Htlc htlc = new Htlc("1.16.124");
+
+    @Test
+    public void testByteSerialization(){
+        Htlc htlc1 = new Htlc("1.16.1");
+        Htlc htlc2 = new Htlc("1.16.100");
+        Htlc htlc3 = new Htlc("1.16.500");
+        Htlc htlc4 = new Htlc("1.16.1000");
+
+        byte[] expected_1 = Util.hexToBytes("01");
+        byte[] expected_2 = Util.hexToBytes("64");
+        byte[] expected_3 = Util.hexToBytes("f403");
+        byte[] expected_4 = Util.hexToBytes("e807");
+
+        Assert.assertArrayEquals(expected_1, htlc1.toBytes());
+        Assert.assertArrayEquals(expected_2, htlc2.toBytes());
+        Assert.assertArrayEquals(expected_3, htlc3.toBytes());
+        Assert.assertArrayEquals(expected_4, htlc4.toBytes());
+    }
+}

graphenej/src/test/java/cy/agorise/graphenej/TransactionTest.java

@@ -13,6 +13,7 @@ import org.junit.Test;
 import java.io.IOException;
 import java.math.BigInteger;
 import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -24,7 +25,6 @@ import cy.agorise.graphenej.api.TransactionBroadcastSequence;
 import cy.agorise.graphenej.interfaces.WitnessResponseListener;
 import cy.agorise.graphenej.models.BaseResponse;
 import cy.agorise.graphenej.models.WitnessResponse;
-import cy.agorise.graphenej.objects.Memo;
 import cy.agorise.graphenej.operations.CustomOperation;
 import cy.agorise.graphenej.operations.LimitOrderCancelOperation;
 import cy.agorise.graphenej.operations.LimitOrderCreateOperation;
@@ -153,7 +153,8 @@ public class TransactionTest {
         PublicKey to2 = new PublicKey(ECKey.fromPublicOnly(new BrainKey(BILTHON_16_BRAIN_KEY, 0).getPublicKey()));
 
         // Creating memo
-        BigInteger nonce = BigInteger.ONE;
+        SecureRandom random = new SecureRandom();
+        BigInteger nonce = BigInteger.valueOf(random.nextLong());
         byte[] encryptedMessage = Memo.encryptMessage(sourcePrivateKey, to1, nonce, "another message");
         Memo memo = new Memo(new Address(ECKey.fromPublicOnly(sourcePrivateKey.getPubKey())), new Address(to1.getKey()), nonce, encryptedMessage);
 
@@ -346,4 +347,21 @@ public class TransactionTest {
         // Broadcasting transaction
         broadcastTransaction(sourcePrivateKey, operationList, listener, null);
     }
+
+    @Test
+    public void testTransactionHash(){
+        ArrayList<BaseOperation> operations = new ArrayList<>();
+        TransferOperation transferOperation = new TransferOperationBuilder()
+                .setTransferAmount(new AssetAmount(UnsignedLong.valueOf("363"), new Asset("1.3.0")))
+                .setFee(new AssetAmount(UnsignedLong.valueOf("10420"), new Asset("1.3.0")))
+                .setSource(new UserAccount("1.2.1029856"))
+                .setDestination(new UserAccount("1.2.390320"))
+                .build();
+        BlockData blockData = new BlockData(50885, 2948192884L, 1543548351);
+        operations.add(transferOperation);
+        Transaction transaction = new Transaction(blockData, operations);
+        byte[] testHash = transaction.getHash();
+        // Making sure the generated hash matches the one we expect from the block explorer
+        Assert.assertArrayEquals(Util.hexToBytes("4fec588ccdd04daaf80666a3646a48b5189df041"), testHash);
+    }
 }

graphenej/src/test/java/cy/agorise/graphenej/api/GetAccountsTest.java

@@ -0,0 +1,67 @@
+package cy.agorise.graphenej.api;
+
+import com.neovisionaries.ws.client.WebSocketException;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.interfaces.WitnessResponseListener;
+import cy.agorise.graphenej.models.AccountProperties;
+import cy.agorise.graphenej.models.BaseResponse;
+import cy.agorise.graphenej.models.WitnessResponse;
+
+public class GetAccountsTest extends BaseApiTest {
+    private UserAccount ltmAccount = new UserAccount("1.2.99700");
+    private UserAccount nonLtmAccount = new UserAccount("1.2.140994");
+
+    @Test
+    public void testGetAccount(){
+        ArrayList<UserAccount> userAccounts = new ArrayList<>();
+        userAccounts.add(ltmAccount);
+        userAccounts.add(nonLtmAccount);
+        mWebSocket.addListener(new GetAccounts(userAccounts, true, new WitnessResponseListener(){
+
+            @Override
+            public void onSuccess(WitnessResponse response) {
+                System.out.println("onSuccess.");
+                List<AccountProperties> accounts = (List<AccountProperties>) response.result;
+                System.out.println(String.format("Got %d accounts", accounts.size()));
+                for(AccountProperties accountProperties : accounts){
+                    System.out.println("account name....: "+accountProperties.name);
+                    System.out.println("expiration date.: "+accountProperties.membership_expiration_date);
+                }
+                AccountProperties ltmAccountProperties = accounts.get(0);
+                AccountProperties nonLtmAccountProperties = accounts.get(1);
+                Assert.assertEquals(ltmAccountProperties.membership_expiration_date, UserAccount.LIFETIME_EXPIRATION_DATE);
+                Assert.assertFalse(nonLtmAccountProperties.membership_expiration_date.equals(UserAccount.LIFETIME_EXPIRATION_DATE));
+                synchronized (GetAccountsTest.this){
+                    GetAccountsTest.this.notifyAll();
+                }
+            }
+
+            @Override
+            public void onError(BaseResponse.Error error) {
+                System.out.println("onError. Msg: "+error.message);
+                synchronized (GetAccountsTest.this){
+                    GetAccountsTest.this.notifyAll();
+                }
+            }
+        }));
+
+        try{
+            mWebSocket.connect();
+            synchronized (this){
+                wait();
+            }
+        }catch (WebSocketException e) {
+            System.out.println("WebSocketException. Msg: " + e.getMessage());
+        } catch (InterruptedException e) {
+            System.out.println("InterruptedException. Msg: "+e.getMessage());
+        }
+    }
+}

graphenej/src/test/java/cy/agorise/graphenej/api/GetObjectsTest.java

@@ -11,6 +11,7 @@ import java.util.List;
 
 import cy.agorise.graphenej.Asset;
 import cy.agorise.graphenej.GrapheneObject;
+import cy.agorise.graphenej.Price;
 import cy.agorise.graphenej.UserAccount;
 import cy.agorise.graphenej.interfaces.WitnessResponseListener;
 import cy.agorise.graphenej.models.BaseResponse;
@@ -26,7 +27,8 @@ public class GetObjectsTest extends BaseApiTest{
     private final Asset asset = new Asset("1.3.0", "BTS", 5);
     private final UserAccount account = new UserAccount("1.2.116354");
     private final UserAccount bilthon_25 = new UserAccount("1.2.151069");
-    private final String bitAssetId = "2.4.13";
+    private UserAccount ltmAccount = new UserAccount("1.2.99700");
+    private final String[] bitAssetIds = new String[]{"2.4.21", "2.4.83"};
 
     @Test
     public void testGetAsset(){
@@ -109,23 +111,86 @@ public class GetObjectsTest extends BaseApiTest{
     }
 
     @Test
-    public void testBitAssetData(){
+    public void testGetLtmAccount(){
-        try{
         ArrayList<String> ids = new ArrayList<>();
-            ids.add(bitAssetId);
+        ids.add(ltmAccount.getObjectId());
         mWebSocket.addListener(new GetObjects(ids, new WitnessResponseListener() {
 
             @Override
             public void onSuccess(WitnessResponse response) {
                 System.out.println("onSuccess");
-                    List<GrapheneObject> list = (List<GrapheneObject>) response.result;
+                List<GrapheneObject> result = (List<GrapheneObject>) response.result;
-                    BitAssetData bitAssetData = (BitAssetData) list.get(0);
+                UserAccount userAccount = (UserAccount) result.get(0);
-                    System.out.println("feed time: " + bitAssetData.current_feed_publication_time);
+                System.out.println("Account name.....: "+userAccount.getName());
+                System.out.println("Is LTM...........: "+userAccount.isLifeTime());
+                System.out.println("json string......: "+userAccount.toJsonString());
+                System.out.println("owner............: "+userAccount.getOwner().getKeyAuthList().get(0).getAddress());
+                System.out.println("active key.......: "+userAccount.getActive().getKeyAuthList().get(0).getAddress());
+                System.out.println("memo: "+userAccount.getOptions().getMemoKey().getAddress());
+                Assert.assertEquals("We expect this account to be LTM",true, userAccount.isLifeTime());
+                synchronized (GetObjectsTest.this){
+                    GetObjectsTest.this.notifyAll();
+                }
             }
 
             @Override
             public void onError(BaseResponse.Error error) {
                 System.out.println("onError");
+                synchronized (GetObjectsTest.this){
+                    GetObjectsTest.this.notifyAll();
+                }
+            }
+        }));
+
+        try {
+            mWebSocket.connect();
+            synchronized (this){
+                wait();
+            }
+        }catch (WebSocketException e) {
+            System.out.println("WebSocketException. Msg: " + e.getMessage());
+        } catch (InterruptedException e) {
+            System.out.println("InterruptedException. Msg: "+e.getMessage());
+        }
+    }
+
+    @Test
+    public void testBitAssetData(){
+        try{
+            ArrayList<String> ids = new ArrayList<>();
+            for(String bitAssetId : bitAssetIds){
+                ids.add(bitAssetId);
+            }
+            mWebSocket.addListener(new GetObjects(ids, new WitnessResponseListener() {
+
+                @Override
+                public void onSuccess(WitnessResponse response) {
+                    System.out.println("onSuccess");
+                    List<BitAssetData> list = (List<BitAssetData>) response.result;
+                    System.out.println("Response array length: "+list.size());
+                    BitAssetData bitAssetData1 = list.get(0);
+                    BitAssetData bitAssetData2 = list.get(1);
+
+                    Price price1 = bitAssetData1.getCurrentFeed().getSettlementPrice();
+                    Price price2 = bitAssetData2.getCurrentFeed().getSettlementPrice();
+
+                    System.out.println("Bitasset data 1");
+                    System.out.println("Price 1: "+price1.toString());
+
+                    System.out.println("Bitasset data 2");
+                    System.out.println("Price 1: "+price2.toString());
+
+                    synchronized (GetObjectsTest.this){
+                        GetObjectsTest.this.notifyAll();
+                    }
+                }
+
+                @Override
+                public void onError(BaseResponse.Error error) {
+                    System.out.println("onError");
+                    synchronized (GetObjectsTest.this){
+                        GetObjectsTest.this.notifyAll();
+                    }
                 }
             }));
 

graphenej/src/test/java/cy/agorise/graphenej/api/GetRelativeAccountHistoryTest.java

@@ -8,7 +8,7 @@ import java.util.List;
 import cy.agorise.graphenej.UserAccount;
 import cy.agorise.graphenej.interfaces.WitnessResponseListener;
 import cy.agorise.graphenej.models.BaseResponse;
-import cy.agorise.graphenej.models.HistoricalTransfer;
+import cy.agorise.graphenej.models.OperationHistory;
 import cy.agorise.graphenej.models.WitnessResponse;
 import cy.agorise.graphenej.operations.TransferOperation;
 
@@ -51,11 +51,11 @@ public class GetRelativeAccountHistoryTest extends BaseApiTest {
         public void onSuccess(WitnessResponse response) {
             System.out.println("mTransferHistoryListener.onSuccess");
             historicalTransferCount++;
-            WitnessResponse<List<HistoricalTransfer>> resp = response;
+            WitnessResponse<List<OperationHistory>> resp = response;
-            for(HistoricalTransfer historicalTransfer : resp.result){
+            for(OperationHistory historicalTransfer : resp.result){
                 if(historicalTransfer.getOperation() != null){
                     System.out.println("Got transfer operation!");
-                    TransferOperation transferOperation = historicalTransfer.getOperation();
+                    TransferOperation transferOperation = (TransferOperation) historicalTransfer.getOperation();
                     System.out.println(String.format("%s - > %s, memo: %s",
                             transferOperation.getFrom().getObjectId(),
                             transferOperation.getTo().getObjectId(),

graphenej/src/test/java/cy/agorise/graphenej/api/SubscriptionMessagesHubTest.java

@@ -10,13 +10,14 @@ import java.util.Timer;
 import java.util.TimerTask;
 
 import cy.agorise.graphenej.ObjectType;
-import cy.agorise.graphenej.Transaction;
 import cy.agorise.graphenej.interfaces.NodeErrorListener;
 import cy.agorise.graphenej.interfaces.SubscriptionListener;
 import cy.agorise.graphenej.models.BaseResponse;
 import cy.agorise.graphenej.models.BroadcastedTransaction;
 import cy.agorise.graphenej.models.DynamicGlobalProperties;
+import cy.agorise.graphenej.models.OperationHistory;
 import cy.agorise.graphenej.models.SubscriptionResponse;
+import cy.agorise.graphenej.Transaction;
 
 /**
  * Class used to encapsulate all tests that relate to the {@see SubscriptionMessagesHub} class.
@@ -178,7 +179,7 @@ public class SubscriptionMessagesHubTest extends BaseApiTest {
     @Test
     public void testBroadcastedTransactionDeserializer(){
         try{
-            mMessagesHub = new SubscriptionMessagesHub("", "", mErrorListener);
+            mMessagesHub = new SubscriptionMessagesHub("", "", true, mErrorListener);
             mMessagesHub.addSubscriptionListener(new SubscriptionListener() {
                 private int MAX_MESSAGES = 15;
                 private int messageCounter = 0;
@@ -197,7 +198,7 @@ public class SubscriptionMessagesHubTest extends BaseApiTest {
                                 if(item instanceof BroadcastedTransaction){
                                     BroadcastedTransaction broadcastedTransaction = (BroadcastedTransaction) item;
                                     Transaction tx = broadcastedTransaction.getTransaction();
-                                    System.out.println(String.format("Got %d operations", tx.getOperations().size()));
+//                                    System.out.println(String.format("Got %d operations", tx.getOperations().size()));
                                 }
                             }
                         }
@@ -213,6 +214,30 @@ public class SubscriptionMessagesHubTest extends BaseApiTest {
                 }
             });
 
+            mMessagesHub.addSubscriptionListener(new SubscriptionListener() {
+
+                @Override
+                public ObjectType getInterestObjectType() {
+                    return ObjectType.OPERATION_HISTORY_OBJECT;
+                }
+
+                @Override
+                public void onSubscriptionUpdate(SubscriptionResponse response) {
+                    System.out.println("onSubscriptionUpdate. response.params.size: "+response.params.size());
+                    if(response.params.size() == 2){
+                        List<Serializable> payload = (List) response.params.get(1);
+                        if(payload.size() > 0){
+                            for(Serializable item : payload){
+                                if(item instanceof OperationHistory){
+                                    OperationHistory operationHistory = (OperationHistory) item;
+                                    System.out.println("Operation history: <id:"+operationHistory.getObjectId()+", op: "+operationHistory.getOperation().toJsonString()+">");
+                                }
+                            }
+                        }
+                    }
+                }
+            });
+
             mWebSocket.addListener(mMessagesHub);
             mWebSocket.connect();
 

graphenej/src/test/java/cy/agorise/graphenej/api/calls/GetAccountHistoryTest.java

@@ -0,0 +1,25 @@
+package cy.agorise.graphenej.api.calls;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.models.ApiCall;
+
+public class GetAccountHistoryTest {
+
+    @Test
+    public void testSerialization(){
+        UserAccount userAccount = new UserAccount("1.2.139293");
+        String end = "1.11.225030218";
+        String start = "1.11.225487973";
+        int limit = 20;
+        GetAccountHistory getAccountHistory = new GetAccountHistory(userAccount, start, end, limit);
+        ApiCall apiCall = getAccountHistory.toApiCall(2, 3);
+        String serialized = apiCall.toJsonString();
+        System.out.println("> "+serialized);
+        String expected = "{\"id\":3,\"method\":\"call\",\"params\":[2,\"get_account_history\",[\"1.2.139293\",\"1.11.225030218\",20,\"1.11.225487973\"]],\"jsonrpc\":\"2.0\"}";
+        Assert.assertEquals("Serialized is as expected", expected, serialized);
+    }
+}

graphenej/src/test/java/cy/agorise/graphenej/models/FullAccountDetailsTest.java

@@ -0,0 +1,39 @@
+package cy.agorise.graphenej.models;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+import java.lang.reflect.Type;
+import java.util.List;
+
+import cy.agorise.graphenej.AccountOptions;
+import cy.agorise.graphenej.Authority;
+import cy.agorise.graphenej.Memo;
+
+public class FullAccountDetailsTest {
+
+    @Test
+    public void testDeserialization(){
+        String serialized = "{\"id\":0,\"jsonrpc\":\"2.0\",\"result\":[[\"bilthon-1\",{\"account\":{\"id\":\"1.2.139205\",\"membership_expiration_date\":\"1970-01-01T00:00:00\",\"registrar\":\"1.2.117600\",\"referrer\":\"1.2.90200\",\"lifetime_referrer\":\"1.2.90200\",\"network_fee_percentage\":2000,\"lifetime_referrer_fee_percentage\":3000,\"referrer_rewards_percentage\":9000,\"name\":\"bilthon-1\",\"owner\":{\"weight_threshold\":1,\"account_auths\":[],\"key_auths\":[[\"BTS8RiFgs8HkcVPVobHLKEv6yL3iXcC9SWjbPVS15dDAXLG9GYhnY\",1]],\"address_auths\":[]},\"active\":{\"weight_threshold\":1,\"account_auths\":[],\"key_auths\":[[\"BTS8RiFgs8HkcVPVobHLKEv6yL3iXcC9SWjbPVS15dDAXLG9GYhnY\",1]],\"address_auths\":[]},\"options\":{\"memo_key\":\"BTS8RiFgs8HkcVPVobHLKEv6yL3iXcC9SWjbPVS15dDAXLG9GYhnY\",\"voting_account\":\"1.2.5\",\"num_witness\":0,\"num_committee\":0,\"votes\":[],\"extensions\":[]},\"statistics\":\"2.6.139205\",\"whitelisting_accounts\":[],\"blacklisting_accounts\":[],\"whitelisted_accounts\":[],\"blacklisted_accounts\":[],\"owner_special_authority\":[0,{}],\"active_special_authority\":[0,{}],\"top_n_control_flags\":0},\"statistics\":{\"id\":\"2.6.139205\",\"owner\":\"1.2.139205\",\"name\":\"bilthon-1\",\"most_recent_op\":\"2.9.6668024\",\"total_ops\":3,\"removed_ops\":0,\"total_core_in_orders\":0,\"core_in_balance\":71279,\"has_cashback_vb\":false,\"is_voting\":false,\"lifetime_fees_paid\":28721,\"pending_fees\":0,\"pending_vested_fees\":0},\"registrar_name\":\"bitshares-munich-faucet\",\"referrer_name\":\"bitshares-munich\",\"lifetime_referrer_name\":\"bitshares-munich\",\"votes\":[],\"balances\":[{\"id\":\"2.5.44951\",\"owner\":\"1.2.139205\",\"asset_type\":\"1.3.0\",\"balance\":71279,\"maintenance_flag\":false}],\"vesting_balances\":[],\"limit_orders\":[],\"call_orders\":[],\"settle_orders\":[],\"proposals\":[],\"assets\":[],\"withdraws\":[]}],[\"bilthon-2\",{\"account\":{\"id\":\"1.2.139207\",\"membership_expiration_date\":\"1970-01-01T00:00:00\",\"registrar\":\"1.2.117600\",\"referrer\":\"1.2.90200\",\"lifetime_referrer\":\"1.2.90200\",\"network_fee_percentage\":2000,\"lifetime_referrer_fee_percentage\":3000,\"referrer_rewards_percentage\":9000,\"name\":\"bilthon-2\",\"owner\":{\"weight_threshold\":1,\"account_auths\":[],\"key_auths\":[[\"BTS7gD2wtSauXpSCBin1rYctBcPWeZieX7YrVk1DuQpg9peczSqTv\",1]],\"address_auths\":[]},\"active\":{\"weight_threshold\":1,\"account_auths\":[],\"key_auths\":[[\"BTS7gD2wtSauXpSCBin1rYctBcPWeZieX7YrVk1DuQpg9peczSqTv\",1]],\"address_auths\":[]},\"options\":{\"memo_key\":\"BTS7gD2wtSauXpSCBin1rYctBcPWeZieX7YrVk1DuQpg9peczSqTv\",\"voting_account\":\"1.2.5\",\"num_witness\":0,\"num_committee\":0,\"votes\":[],\"extensions\":[]},\"statistics\":\"2.6.139207\",\"whitelisting_accounts\":[],\"blacklisting_accounts\":[],\"whitelisted_accounts\":[],\"blacklisted_accounts\":[],\"owner_special_authority\":[0,{}],\"active_special_authority\":[0,{}],\"top_n_control_flags\":0},\"statistics\":{\"id\":\"2.6.139207\",\"owner\":\"1.2.139207\",\"name\":\"bilthon-2\",\"most_recent_op\":\"2.9.6159244\",\"total_ops\":1,\"removed_ops\":0,\"total_core_in_orders\":0,\"core_in_balance\":0,\"has_cashback_vb\":false,\"is_voting\":false,\"lifetime_fees_paid\":0,\"pending_fees\":0,\"pending_vested_fees\":0},\"registrar_name\":\"bitshares-munich-faucet\",\"referrer_name\":\"bitshares-munich\",\"lifetime_referrer_name\":\"bitshares-munich\",\"votes\":[],\"balances\":[],\"vesting_balances\":[],\"limit_orders\":[],\"call_orders\":[],\"settle_orders\":[],\"proposals\":[],\"assets\":[],\"withdraws\":[]}]]}";
+        Gson gson = new GsonBuilder()
+                .registerTypeAdapter(FullAccountDetails.class, new FullAccountDetails.FullAccountDeserializer())
+                .registerTypeAdapter(Authority.class, new Authority.AuthorityDeserializer())
+                .registerTypeAdapter(Memo.class, new Memo.MemoDeserializer())
+                .registerTypeAdapter(AccountOptions.class, new AccountOptions.AccountOptionsDeserializer())
+                .create();
+        Type FullAccountDetailsResponse = new TypeToken<JsonRpcResponse<List<FullAccountDetails>>>() {}.getType();
+        JsonRpcResponse<List<FullAccountDetails>> response = gson.fromJson(serialized, FullAccountDetailsResponse);
+        Assert.assertNotNull(response.result);
+        Assert.assertNull(response.error);
+        List<FullAccountDetails> fullAccountDetailsList = response.result;
+        Assert.assertNotNull(fullAccountDetailsList);
+        Assert.assertEquals(2, fullAccountDetailsList.size());
+        Assert.assertNotNull(fullAccountDetailsList.get(0).getAccount());
+        Assert.assertEquals("bilthon-1", fullAccountDetailsList.get(0).getAccount().name);
+    }
+}

graphenej/src/test/java/cy/agorise/graphenej/models/HistoryOperationDetailsTest.java

@@ -0,0 +1,40 @@
+package cy.agorise.graphenej.models;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+import java.lang.reflect.Type;
+
+import cy.agorise.graphenej.AssetAmount;
+import cy.agorise.graphenej.BaseOperation;
+import cy.agorise.graphenej.Extensions;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.api.android.DeserializationMap;
+import cy.agorise.graphenej.Memo;
+
+public class HistoryOperationDetailsTest {
+
+    @Test
+    public void testDeserialization(){
+        String text = "{\"id\":5,\"jsonrpc\":\"2.0\",\"result\":{\"total_count\":2,\"operation_history_objs\":[{\"id\":\"1.11.5701809\",\"op\":[0,{\"fee\":{\"amount\":264174,\"asset_id\":\"1.3.0\"},\"from\":\"1.2.99700\",\"to\":\"1.2.138632\",\"amount\":{\"amount\":20000,\"asset_id\":\"1.3.120\"},\"extensions\":[]}],\"result\":[0,{}],\"block_num\":11094607,\"trx_in_block\":0,\"op_in_trx\":0,\"virtual_op\":31767},{\"id\":\"1.11.5701759\",\"op\":[0,{\"fee\":{\"amount\":264174,\"asset_id\":\"1.3.0\"},\"from\":\"1.2.99700\",\"to\":\"1.2.138632\",\"amount\":{\"amount\":10000000,\"asset_id\":\"1.3.0\"},\"extensions\":[]}],\"result\":[0,{}],\"block_num\":11094501,\"trx_in_block\":0,\"op_in_trx\":0,\"virtual_op\":31717}]}}\n";
+        Gson gson = new GsonBuilder()
+                .setExclusionStrategies(new DeserializationMap.SkipAccountOptionsStrategy(), new DeserializationMap.SkipAssetOptionsStrategy())
+                .registerTypeAdapter(BaseOperation.class, new BaseOperation.OperationDeserializer())
+                .registerTypeAdapter(OperationHistory.class, new OperationHistory.OperationHistoryDeserializer())
+                .registerTypeAdapter(Memo.class, new Memo.MemoSerializer())
+                .registerTypeAdapter(Extensions.class, new Extensions.ExtensionsDeserializer())
+                .registerTypeAdapter(UserAccount.class, new UserAccount.UserAccountSimpleDeserializer())
+                .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+                .create();
+
+        Type GetAccountHistoryByOperationsResponse = new TypeToken<JsonRpcResponse<HistoryOperationDetail>>(){}.getType();
+        JsonRpcResponse<HistoryOperationDetail> response = gson.fromJson(text, GetAccountHistoryByOperationsResponse);
+        Assert.assertNotNull(response.result);
+        Assert.assertNotNull(response.result.operation_history_objs);
+    }
+}

graphenej/src/test/java/cy/agorise/graphenej/models/JsonRpcNotificationTest.java

@@ -0,0 +1,59 @@
+package cy.agorise.graphenej.models;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+import cy.agorise.graphenej.AssetAmount;
+import cy.agorise.graphenej.Transaction;
+import cy.agorise.graphenej.UserAccount;
+import cy.agorise.graphenej.Memo;
+import cy.agorise.graphenej.operations.CustomOperation;
+import cy.agorise.graphenej.operations.LimitOrderCreateOperation;
+import cy.agorise.graphenej.operations.TransferOperation;
+
+public class JsonRpcNotificationTest {
+
+    private String text = "{\"method\":\"notice\",\"params\":[3,[[{\"id\":\"2.1.0\",\"head_block_number\":30071834,\"head_block_id\":\"01cadc1a5f3f517e2eba9588111aef3af3c59916\",\"time\":\"2018-08-30T18:19:45\",\"current_witness\":\"1.6.74\",\"next_maintenance_time\":\"2018-08-30T19:00:00\",\"last_budget_time\":\"2018-08-30T18:00:00\",\"witness_budget\":80800000,\"accounts_registered_this_interval\":9,\"recently_missed_count\":0,\"current_aslot\":30228263,\"recent_slots_filled\":\"340282366920938463463374607431768211455\",\"dynamic_flags\":0,\"last_irreversible_block_num\":30071813}]]]}";
+
+    @Test
+    public void failResponseDeserialization(){
+        Gson gson = new Gson();
+        JsonRpcResponse<?> response = gson.fromJson(text, JsonRpcResponse.class);
+        // The result field of this de-serialized object should be null
+        Assert.assertNull(response.result);
+    }
+
+    @Test
+    public void succeedNotificationDeserialization(){
+        Gson gson = new GsonBuilder()
+            .registerTypeAdapter(Transaction.class, new Transaction.TransactionDeserializer())
+            .registerTypeAdapter(TransferOperation.class, new TransferOperation.TransferDeserializer())
+            .registerTypeAdapter(LimitOrderCreateOperation.class, new LimitOrderCreateOperation.LimitOrderCreateDeserializer())
+            .registerTypeAdapter(CustomOperation.class, new CustomOperation.CustomOperationDeserializer())
+            .registerTypeAdapter(AssetAmount.class, new AssetAmount.AssetAmountDeserializer())
+            .registerTypeAdapter(UserAccount.class, new UserAccount.UserAccountSimpleDeserializer())
+            .registerTypeAdapter(DynamicGlobalProperties.class, new DynamicGlobalProperties.DynamicGlobalPropertiesDeserializer())
+            .registerTypeAdapter(Memo.class, new Memo.MemoDeserializer())
+            .registerTypeAdapter(OperationHistory.class, new OperationHistory.OperationHistoryDeserializer())
+            .registerTypeAdapter(JsonRpcNotification.class, new JsonRpcNotification.JsonRpcNotificationDeserializer())
+            .create();
+        JsonRpcNotification notification = gson.fromJson(text, JsonRpcNotification.class);
+        // Should deserialize a 'params' array with 2 elements
+        Assert.assertEquals(2, notification.params.size());
+        // The first element should be the number 3
+        Assert.assertEquals(3, notification.params.get(0));
+        ArrayList<Serializable> secondArgument = (ArrayList<Serializable>) notification.params.get(1);
+        // The second element should be an array of length 1
+        Assert.assertEquals(1, secondArgument.size());
+        // Extracting the payload, which should be in itself another array
+        DynamicGlobalProperties payload = (DynamicGlobalProperties) secondArgument.get(0);
+        // Dynamic global properties head_block_number should match
+        Assert.assertEquals(30071834, payload.head_block_number);
+    }
+}

graphenej/src/test/java/cy/agorise/graphenej/models/JsonRpcResponseTest.java

@@ -0,0 +1,20 @@
+package cy.agorise.graphenej.models;
+
+import com.google.gson.Gson;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+public class JsonRpcResponseTest {
+
+    @Test
+    public void deserializeJsonRpcResponse(){
+        String text = "{\"id\":4,\"jsonrpc\":\"2.0\",\"result\":[{\"id\":\"2.1.0\",\"head_block_number\":30071833,\"head_block_id\":\"01cadc1964cb04ab551463e26033ab0f159bc8e1\",\"time\":\"2018-08-30T18:19:42\",\"current_witness\":\"1.6.71\",\"next_maintenance_time\":\"2018-08-30T19:00:00\",\"last_budget_time\":\"2018-08-30T18:00:00\",\"witness_budget\":80900000,\"accounts_registered_this_interval\":9,\"recently_missed_count\":0,\"current_aslot\":30228262,\"recent_slots_filled\":\"340282366920938463463374607431768211455\",\"dynamic_flags\":0,\"last_irreversible_block_num\":30071813}]}";
+        Gson gson = new Gson();
+        JsonRpcResponse<?> response = gson.fromJson(text, JsonRpcResponse.class);
+        System.out.println("response: "+response.result);
+        Assert.assertNotNull(response);
+        Assert.assertNotNull(response.result);
+    }
+}