1 files changed, 15 insertions, 1 deletions
diff --git a/packages/testnet-faucets/src/ts/id_management.ts b/packages/testnet-faucets/src/ts/id_management.ts
index db9b610a3..7c598f91c 100644
--- a/packages/testnet-faucets/src/ts/id_management.ts
+++ b/packages/testnet-faucets/src/ts/id_management.ts
@@ -1,8 +1,10 @@
 import EthereumTx = require('ethereumjs-tx');
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
 
 import { configs } from './configs';
 
-type Callback = (err: Error | null, accounts: any) => void;
+type Callback = (err: Error | null, result: any) => void;
 
 export const idManagement = {
     getAccounts(callback: Callback) {
@@ -18,4 +20,16 @@ export const idManagement = {
         const rawTx = `0x${tx.serialize().toString('hex')}`;
         callback(null, rawTx);
     },
+    signMessage(message: object, callback: Callback) {
+        const dataIfExists = _.get(message, 'data');
+        if (_.isUndefined(dataIfExists)) {
+            callback(new Error('NO_DATA_TO_SIGN'), null);
+        }
+        const privateKeyBuffer = new Buffer(configs.DISPENSER_PRIVATE_KEY as string, 'hex');
+        const dataBuff = ethUtil.toBuffer(dataIfExists);
+        const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
+        const sig = ethUtil.ecsign(msgHashBuff, privateKeyBuffer);
+        const rpcSig = ethUtil.toRpcSig(sig.v, sig.r, sig.s);
+        callback(null, rpcSig);
+    },
 };