CHANGED Account adding signData method

Author: Aleix Morgadas

src/model/account/Account.ts

@@ -131,4 +131,15 @@ export class Account {
     public signCosignatureTransaction(cosignatureTransaction: CosignatureTransaction): CosignatureSignedTransaction {
         return cosignatureTransaction.signWith(this);
     }
+
+    /**
+     * Sign raw data
+     * @param data - Data to be signed
+     * @return {string} - Signed data result
+     */
+    public signData(data: string): string {
+        return convert.uint8ToHex(KeyPair.sign(this.keyPair,
+                            convert.hexToUint8(convert.utf8ToHex(data)),
+                        ));
+    }
 }

test/model/account/Account.spec.ts

@@ -17,6 +17,7 @@
 import {expect} from 'chai';
 import {Account} from '../../../src/model/account/Account';
 import {NetworkType} from '../../../src/model/blockchain/NetworkType';
+import { PublicAccount } from '../../../src/model/model';
 
 describe('Account', () => {
     const accountInformation = {
@@ -45,4 +46,14 @@ describe('Account', () => {
         expect(account.address).to.not.be.equal(undefined);
     });
 
+    it('signData', () => {
+        const account = Account.createFromPrivateKey(
+            'AB860ED1FE7C91C02F79C02225DAC708D7BD13369877C1F59E678CC587658C47',
+            NetworkType.MIJIN_TEST,
+        );
+        const publicAccount = account.publicAccount;
+        const signed = account.signData('catapult rocks!');
+        expect(publicAccount.verifySignature('catapult rocks!', signed))
+            .to.be.equal(true);
+    });
 });