agorise/graphenej
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Added support for the 'get_assets' API call and updated the Asset class accordingly

Browse source
This commit is contained in:
Nelson R. Perez 2017-01-05 16:51:14 -05:00
parent ef50a9f7ef
commit 7cd0a76e2e
9 changed files with 330 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
src/main/java/de/bitsharesmunich/graphenej/Asset.java
View file

@ -1,5 +1,6 @@
package de.bitsharesmunich.graphenej;
import com.google.common.primitives.UnsignedLong;
import com.google.gson.*;
import java.lang.reflect.Type;
@ -12,6 +13,14 @@ public class Asset extends GrapheneObject {
public static final String KEY_SYMBOL = "symbol";
public static final String KEY_PRECISION = "precision";
public static final String KEY_ISSUER = "issuer";
public static final String KEY_OPTIONS = "options";
public static final String KEY_MAX_SUPPLY = "max_supply";
public static final String KEY_MARKET_FEE_PERCENT = "market_fee_percent";
public static final String KEY_MARKET_FEE = "max_market_fee";
public static final String KEY_ISSUER_PERMISSIONS = "issuer_permissions";
public static final String KEY_FLAGS = "flags";
public static final String KEY_CORE_EXCHANGE_RATE = "core_exchange_rate";
public static final String KEY_DESCRIPTION = "description";
public static final String KEY_DYNAMIC_ASSET_DATA_ID = "dynamic_asset_data_id";
private String symbol;
@ -83,6 +92,14 @@ public class Asset extends GrapheneObject {
return description;
}
public void setAssetOptions(AssetOptions options){
this.options = options;
}
public AssetOptions getAssetOptions(){
return this.options;
}
@Override
public int hashCode() {
return super.hashCode();
@ -97,6 +114,14 @@ public class Asset extends GrapheneObject {
}
}
/**
* Returns true if this is a witness-fed asset and all issuer permissions flags are set.
* @return: True if the asset is a smartcoin.
*/
public boolean isSmartcoin(){
return this.options.getFlags() == 128 && options.getIssuerPermissions() == 511;
}
/**
* Custom deserializer used to instantiate a simple version of the Asset class from the response of the
* 'lookup_asset_symbols' API call.
@ -110,7 +135,21 @@ public class Asset extends GrapheneObject {
String symbol = object.get(KEY_SYMBOL).getAsString();
int precision = object.get(KEY_PRECISION).getAsInt();
String issuer = object.get(KEY_ISSUER).getAsString();
return new Asset(id, symbol, precision, issuer);
JsonObject optionsJson = object.get(KEY_OPTIONS).getAsJsonObject();
// Deserializing asset options
AssetOptions options = new AssetOptions();
options.setMaxSupply(UnsignedLong.valueOf(optionsJson.get(KEY_MAX_SUPPLY).getAsString()));
options.setMarketFeePercent(optionsJson.get(KEY_MARKET_FEE_PERCENT).getAsInt());
options.setMaxMarketFee(UnsignedLong.valueOf(optionsJson.get(KEY_MARKET_FEE).getAsString()));
options.setIssuerPermissions(optionsJson.get(KEY_ISSUER_PERMISSIONS).getAsLong());
options.setFlags(optionsJson.get(KEY_FLAGS).getAsInt());
//TODO: Deserialize core_exchange_rate field
Asset asset = new Asset(id, symbol, precision, issuer);
asset.setAssetOptions(options);
return asset;
}
}
}

65
src/main/java/de/bitsharesmunich/graphenej/AssetOptions.java
View file

@ -1,14 +1,73 @@
package de.bitsharesmunich.graphenej;
import com.google.common.primitives.UnsignedLong;
/**
* Created by nelson on 12/13/16.
*/
public class AssetOptions {
private String max_supply;
private UnsignedLong max_supply;
private long market_fee_percent;
private String max_market_fee;
private UnsignedLong max_market_fee;
private long issuer_permissions;
private int flags;
//TODO: Implement core_exchange_rate, whitelist_authorities, blacklist_authorities, whitelist_markets, blacklist_markets and extensions
private Price core_exchange_rate;
//TODO: Implement whitelist_authorities, blacklist_authorities, whitelist_markets, blacklist_markets and extensions
private String description;
public UnsignedLong getMaxSupply() {
return max_supply;
}
public void setMaxSupply(UnsignedLong max_supply) {
this.max_supply = max_supply;
}
public long getMarketFeePercent() {
return market_fee_percent;
}
public void setMarketFeePercent(long market_fee_percent) {
this.market_fee_percent = market_fee_percent;
}
public UnsignedLong getMax_market_fee() {
return max_market_fee;
}
public void setMaxMarketFee(UnsignedLong max_market_fee) {
this.max_market_fee = max_market_fee;
}
public long getIssuerPermissions() {
return issuer_permissions;
}
public void setIssuerPermissions(long issuer_permissions) {
this.issuer_permissions = issuer_permissions;
}
public int getFlags() {
return flags;
}
public void setFlags(int flags) {
this.flags = flags;
}
public Price getCoreExchangeRate() {
return core_exchange_rate;
}
public void setCoreExchangeRate(Price core_exchange_rate) {
this.core_exchange_rate = core_exchange_rate;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}

3
src/main/java/de/bitsharesmunich/graphenej/Main.java
View file

@ -65,10 +65,11 @@ public class Main {
// test.testDecodeMemo();
// test.testGetRelativeAccountHistory();
// test.testLookupAssetSymbols();
test.testListAssets();
// test.testGetBlockHeader();
//test.testGetLimitOrders();
// test.testGetTradeHistory();
// test.testAssetSerialization();
test.testGetMarketHistory();
// test.testGetMarketHistory();
}
}

12
src/main/java/de/bitsharesmunich/graphenej/Price.java
View file

@ -1,6 +1,18 @@
package de.bitsharesmunich.graphenej;
/**
* The price struct stores asset prices in the Graphene system.
*
* A price is defined as a ratio between two assets, and represents a possible exchange rate
* between those two assets. prices are generally not stored in any simplified form, i.e. a price
* of (1000 CORE)/(20 USD) is perfectly normal.
* The assets within a price are labeled base and quote. Throughout the Graphene code base,
* the convention used is that the base asset is the asset being sold, and the quote asset is
* the asset being purchased, where the price is represented as base/quote, so in the example
* price above the seller is looking to sell CORE asset and get USD in return.
*
* Note: Taken from the Graphene doxygen.
* Created by nelson on 12/16/16.
*/
public class Price {

1
src/main/java/de/bitsharesmunich/graphenej/RPC.java
View file

@ -17,6 +17,7 @@ public class RPC {
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_LOOKUP_ACCOUNTS = "lookup_accounts";
public static final String CALL_LIST_ASSETS = "list_assets";
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_LIMIT_ORDERS = "get_limit_orders";

41
src/main/java/de/bitsharesmunich/graphenej/Test.java
View file

@ -855,6 +855,47 @@ public class Test {
}
}
public void testListAssets(){
WitnessResponseListener listener = new WitnessResponseListener() {
@Override
public void onSuccess(WitnessResponse response) {
System.out.println("onSuccess");
List<Asset> resp = (List<Asset>) response.result;
System.out.println(String.format("Got %d assets", resp.size()));
for(Asset asset : resp){
if(asset.isSmartcoin())
System.out.println("Asset: "+asset.getObjectId()+", Symbol: "+asset.getSymbol());
}
}
@Override
public void onError(BaseResponse.Error error) {
System.out.println("onError");
}
};
SSLContext context = null;
try {
context = NaiveSSLContext.getInstance("TLS");
WebSocketFactory factory = new WebSocketFactory();
// Set the custom SSL context.
factory.setSSLContext(context);
WebSocket mWebSocket = factory.createSocket(BLOCK_PAY_DE);
mWebSocket.addListener(new ListAssets("", ListAssets.LIST_ALL, listener));
mWebSocket.connect();
} catch (NoSuchAlgorithmException e) {
System.out.println("NoSuchAlgorithmException. Msg: " + e.getMessage());
} catch (WebSocketException e) {
System.out.println("WebSocketException. Msg: " + e.getMessage());
} catch (IOException e) {
System.out.println("IOException. Msg: " + e.getMessage());
}
}
public void testGetBlockHeader(){
WitnessResponseListener listener = new WitnessResponseListener() {
@Override

36
src/main/java/de/bitsharesmunich/graphenej/api/BaseGrapheneHandler.java Normal file
View file

@ -0,0 +1,36 @@
package de.bitsharesmunich.graphenej.api;
import com.neovisionaries.ws.client.WebSocket;
import com.neovisionaries.ws.client.WebSocketAdapter;
import com.neovisionaries.ws.client.WebSocketException;
import de.bitsharesmunich.graphenej.interfaces.WitnessResponseListener;
import de.bitsharesmunich.graphenej.models.BaseResponse;
/**
* Created by nelson on 1/5/17.
*/
public abstract class BaseGrapheneHandler extends WebSocketAdapter {
protected WitnessResponseListener mListener;
public BaseGrapheneHandler(WitnessResponseListener listener){
this.mListener = listener;
}
@Override
public void onError(WebSocket websocket, WebSocketException cause) throws Exception {
System.out.println("onError. cause: "+cause.getMessage());
mListener.onError(new BaseResponse.Error(cause.getMessage()));
websocket.disconnect();
}
@Override
public void handleCallbackError(WebSocket websocket, Throwable cause) throws Exception {
System.out.println("handleCallbackError. cause: "+cause.getMessage()+", error: "+cause.getClass());
for (StackTraceElement element : cause.getStackTrace()){
System.out.println(element.getFileName()+"#"+element.getClassName()+":"+element.getLineNumber());
}
mListener.onError(new BaseResponse.Error(cause.getMessage()));
websocket.disconnect();
}
}

117
src/main/java/de/bitsharesmunich/graphenej/api/ListAssets.java Normal file
View file

@ -0,0 +1,117 @@
package de.bitsharesmunich.graphenej.api;
import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;
import com.neovisionaries.ws.client.WebSocket;
import com.neovisionaries.ws.client.WebSocketFrame;
import de.bitsharesmunich.graphenej.Asset;
import de.bitsharesmunich.graphenej.RPC;
import de.bitsharesmunich.graphenej.interfaces.WitnessResponseListener;
import de.bitsharesmunich.graphenej.models.ApiCall;
import de.bitsharesmunich.graphenej.models.WitnessResponse;
import java.io.Serializable;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* WebSocketAdapter class used to send a request a 'list_assets' API call to the witness node.
*
* @see: <a href="http://docs.bitshares.org/development/namespaces/app.html"></a>
*
* The API imposes a limit of of 100 assets per request, but if the user of this class wants
* to get a list of all assets, the LIST_ALL constant must be used as second argument in the
* constructor. Internally we are going to perform multiple calls in order to satisfy the user's
* request.
*
* Created by nelson on 1/5/17.
*/
public class ListAssets extends BaseGrapheneHandler {
/**
* 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.
*/
private final int MAX_BATCH_SIZE = 100;
private List<Asset> assets;
private String lowerBound;
private int limit;
private int requestCounter = 0;
/**
* Constructor
* @param lowerBoundSymbol: Lower bound of symbol names to retrieve
* @param limit: Maximum number of assets to fetch, if the constant LIST_ALL
* is passed, all existing assets will be retrieved.
*/
public ListAssets(String lowerBoundSymbol, int limit, WitnessResponseListener listener){
super(listener);
this.lowerBound = lowerBoundSymbol;
this.limit = limit;
}
@Override
public void onConnected(WebSocket websocket, Map<String, List<String>> headers) throws Exception {
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);
}
ApiCall apiCall = new ApiCall(0, RPC.CALL_LIST_ASSETS, params, RPC.VERSION, 0);
websocket.sendText(apiCall.toJsonString());
}
@Override
public void onTextFrame(WebSocket websocket, WebSocketFrame frame) throws Exception {
String response = frame.getPayloadText();
GsonBuilder gsonBuilder = new GsonBuilder();
Type LookupAssetSymbolsResponse = new TypeToken<WitnessResponse<List<Asset>>>(){}.getType();
gsonBuilder.registerTypeAdapter(Asset.class, new Asset.AssetDeserializer());
WitnessResponse<List<Asset>> witnessResponse = gsonBuilder.create().fromJson(response, LookupAssetSymbolsResponse);
if(this.limit != LIST_ALL && this.limit < MAX_BATCH_SIZE){
// If the requested number of assets was below
// the limit, we just call the listener.
mListener.onSuccess(witnessResponse);
websocket.disconnect();
}else{
// Updating counter to keep track of how many batches we already retrieved.
requestCounter++;
if(this.assets == null){
this.assets = new ArrayList<>();
}
this.assets.addAll(witnessResponse.result);
// Checking to see if we're done
if(this.limit == LIST_ALL && witnessResponse.result.size() < MAX_BATCH_SIZE){
// In case we requested all assets, we might be in the last round whenever
// we got less than the requested amount.
witnessResponse.result = this.assets;
mListener.onSuccess(witnessResponse);
websocket.disconnect();
}else if(this.assets.size() == this.limit){
// We already have the required amount of assets
witnessResponse.result = this.assets;
mListener.onSuccess(witnessResponse);
websocket.disconnect();
}else{
// We still need to fetch some more assets
this.lowerBound = this.assets.get(this.assets.size() - 1).getSymbol();
int nextBatch = this.limit == LIST_ALL ? MAX_BATCH_SIZE : this.limit - (MAX_BATCH_SIZE * requestCounter);
ArrayList<Serializable> params = new ArrayList<>();
params.add(this.lowerBound);
params.add(nextBatch);
ApiCall apiCall = new ApiCall(0, RPC.CALL_LIST_ASSETS, params, RPC.VERSION, 0);
websocket.sendText(apiCall.toJsonString());
}
}
}
}

19
src/main/java/de/bitsharesmunich/graphenej/api/LookupAssetSymbols.java
View file

@ -4,11 +4,13 @@ import com.google.gson.GsonBuilder;
import com.google.gson.reflect.TypeToken;
import com.neovisionaries.ws.client.WebSocket;
import com.neovisionaries.ws.client.WebSocketAdapter;
import com.neovisionaries.ws.client.WebSocketException;
import com.neovisionaries.ws.client.WebSocketFrame;
import de.bitsharesmunich.graphenej.Asset;
import de.bitsharesmunich.graphenej.RPC;
import de.bitsharesmunich.graphenej.interfaces.WitnessResponseListener;
import de.bitsharesmunich.graphenej.models.ApiCall;
import de.bitsharesmunich.graphenej.models.BaseResponse;
import de.bitsharesmunich.graphenej.models.WitnessResponse;
import java.io.Serializable;
@ -57,4 +59,21 @@ public class LookupAssetSymbols extends WebSocketAdapter {
if(frame.isTextFrame())
System.out.println(">>> "+frame.getPayloadText());
}
@Override
public void onError(WebSocket websocket, WebSocketException cause) throws Exception {
System.out.println("onError. cause: "+cause.getMessage());
mListener.onError(new BaseResponse.Error(cause.getMessage()));
websocket.disconnect();
}
@Override
public void handleCallbackError(WebSocket websocket, Throwable cause) throws Exception {
System.out.println("handleCallbackError. cause: "+cause.getMessage()+", error: "+cause.getClass());
for (StackTraceElement element : cause.getStackTrace()){
System.out.println(element.getFileName()+"#"+element.getClassName()+":"+element.getLineNumber());
}
mListener.onError(new BaseResponse.Error(cause.getMessage()));
websocket.disconnect();
}
}