Added #112 sign with cosignatories

Author: rg911

src/model/transaction/AggregateTransaction.ts

@@ -230,6 +230,23 @@ export class AggregateTransaction extends Transaction {
                                      this.type, this.networkType);
     }
 
+    /**
+     * @internal
+     * Sign transaction with cosignatories collected from cosigned transactions and creating a new SignedTransaction
+     * For off chain Aggregated Complete Transaction co-signing.
+     * @param initiatorAccount - Initiator account
+     * @param {CosignatureSignedTransaction[]} cosignatureSignedTransaction - Array of cosigned transaction
+     * @return {SignedTransaction}
+     */
+    public signTransactionWithCosignedTransactions(initiatorAccount: Account,
+                                                   cosignatureSignedTransaction: CosignatureSignedTransaction[]) {
+        const aggregateTransaction = this.buildTransaction();
+        const signedTransactionRaw = aggregateTransaction.signTransactionWithCosignedTransactions(initiatorAccount,
+                                                                                                  cosignatureSignedTransaction);
+        return new SignedTransaction(signedTransactionRaw.payload, signedTransactionRaw.hash, initiatorAccount.publicKey,
+                                     this.type, this.networkType);
+    }
+
     /**
      * Check if account has signed transaction
      * @param publicAccount - Signer public account

test/model/transaction/CosignatureTransaction.spec.ts

@@ -15,6 +15,7 @@
  */
 
 import {expect} from 'chai';
+import { VerifiableTransaction } from 'nem2-library';
 import {CreateTransactionFromDTO} from '../../../src/infrastructure/transaction/CreateTransactionFromDTO';
 import {Account} from '../../../src/model/account/Account';
 import { NetworkType } from '../../../src/model/blockchain/NetworkType';
@@ -129,4 +130,4 @@ describe('CosignatureTransaction', () => {
         expect(signedTx.signer).to.be.equal('C2F93346E27CE6AD1A9F8F5E3066F8326593A406BDF357ACB041E2F9AB402EFE');
         expect(signedTx.signer).to.be.equal(account.publicKey);
     });
-});
+});