feat(ref-imp): #781 - make long form use jcs

lib/core/versions/latest/Did.ts

@@ -6,6 +6,7 @@ import OperationType from '../../enums/OperationType';
 import SidetreeError from '../../../common/SidetreeError';
 import { URL } from 'url';
 import Encoder from './Encoder';
+import JsonCanonicalizer from './util/JsonCanonicalizer';
 
 /**
  * Class containing reusable Sidetree DID related operations.
@@ -173,6 +174,8 @@ export default class Did {
       throw new SidetreeError(ErrorCode.DidInitialStateJcsIsNotJosn, 'long form initial state should be encoded jcs');
     }
 
+    Did.validateInitialState(initialStateEncodedJcs, initialStateObject);
+
     const createOperationRequest = {
       type: OperationType.Create,
       suffix_data: initialStateObject.suffix_data,
@@ -183,6 +186,16 @@ export default class Did {
     return createOperation;
   }
 
+  /**
+   * Make sure initial state is JCS
+   */
+  private static validateInitialState(initialStateEncodedJcs: string, initialStateObject: any): void {
+    const expectedInitialState = Encoder.encode(JsonCanonicalizer.canonicalizeAsBuffer(initialStateObject));
+    if (expectedInitialState !== initialStateEncodedJcs) {
+      throw new SidetreeError(ErrorCode.DidInitialStateJcsIsNotJcs, 'make sure to jcs then encode the initial state');
+    }
+  }
+
   private static async constructCreateOperationFromInitialState (initialState: string): Promise<CreateOperation> {
     // Initial state should be in the format: <suffix-data>.<delta>
     const firstIndexOfDot = initialState.indexOf('.');

lib/core/versions/latest/ErrorCode.ts

@@ -48,6 +48,7 @@ export default {
   DeltaExceedsMaximumSize: 'delta_exceeds_maximum_size',
   DeltaMissingOrUnknownProperty: 'delta_missing_or_unknown_property',
   DidIncorrectPrefix: 'did_incorrect_prefix',
+  DidInitialStateJcsIsNotJcs: 'did_initial_state_jcs_is_not_jcs',
   DidInitialStateJcsIsNotJosn: 'did_initial_state_jcs_is_not_json',
   DidInitialStateValueContainsMoreThanOneDot: 'did_initial_state_value_contains_more_than_one_dot',
   DidInitialStateValueContainsNoDot: 'did_initial_state_value_contains_no_dot',