add logical assert

bsip-0040.md

@@ -73,17 +73,16 @@ A `custom active permission` contains a list of `custom active authority`. `Cust
 ### Asserts
 
 The `asserts` field is a list of restrictions consisting of argument to assert mappings.
-An tuple of `(argument_identifier, assert_object[, logical_link])` is called a restriction on an argument.
-All asserts within one restriction are evaluated per default with `and` logic, `or` logic can be put by specifying the `logical_link`. The `asserts` field is specified as follows:
+A dictionary-type object like
 ```
-asserts = list of (argument_identifier, list of assert_object, logical_link) tuples
-argument_identifier = // target variable, can be argument of operation, or attribute in case of nesting
 assert_object = {
-    function, // functionid to do the assert 
-    data,     // stores data specific to the chosen function
-    state     // if this assert is statefull
+   function,     // argument_identifier
+   argument,     // constant value, or pointer to a dynamic value (argument of the operation, or attribute when nested)
+   data,         // data specific to the function
 }
 ```
+is called a restriction. All asserts within one restriction are evaluated per default with `AND` logic. 
+
 List of possible asserts are:
 
 | function        | data           | state  |
@@ -94,6 +93,7 @@ List of possible asserts are:
 | `limit` | [`max_cumsum`, `interval_in_sec`]      | [`current_cumsum`, `interval_began`] |
 | `limit_monthly` | [`max_cumsum`, `interval_in_months`]      | [`current_cumsum`, `interval_began`] |
 | `attribute_assert` | list of restrictions | stateless |
+| `logical`     | list of restrictions | stateless |
 
 Following cases must hold for a restriction:
 - if there is no value given (e.g. an optional argument, or nested value not given), the assert passes (no change, no violation)
@@ -134,6 +134,11 @@ Statefull assert, only `int` type arguments. Analogue to `limit`, but `interval_
 #### `attribute_assert`
 Stateless assert, only for dictionary type objects. The `attribute_to_assert` list contains restrictions that all must assert positively. Allows nesting of `attribute_assert`.
 
+#### `logical`
+Stateless assert, only for dictionary type objects. The data is a list of restrictions, `argument` defines the logical link
+- `OR`: If one of the restrictions in data asserts positively
+- `AND`: If ALL restrictions in data assert positively
+
 #### Example: Nested arguments like `options`
 Assume `asset_update_operation`. All attributes of its `options` must be filled on update call. This assert can not be used to realize a "may only change attribute xzy of `options`". This would require that the logic knows which of the arguments are reflected on-chain and it knows how to query it for every operation that contains `options`. If `options` are to be restricted with this assert, all values that should not change would need be fixated by defining an `any` assert for those attributes, while having e.g. a `lt` assert for the one attribute that is allowed to change.
 
@@ -150,10 +155,11 @@ custom active authority = {
        account_auth: []
     },
     asserts: [
-        (to, {
+        {
             function: any,
+            argument: to,
             data: [B]
-        }) // this restricts the argument identified with "to"
+        } // this restricts the argument identified with "to"
     ]
 }
 ```