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import EthereumTx = require('ethereumjs-tx');
import * as ethUtil from 'ethereumjs-util';
import * as _ from 'lodash';
import { configs } from './configs';
type Callback = (err: Error | null, result: any) => void;
export const idManagement = {
getAccounts(callback: Callback) {
callback(null, [configs.DISPENSER_ADDRESS]);
},
approveTransaction(txData: object, callback: Callback) {
callback(null, true);
},
signTransaction(txData: object, callback: Callback) {
const tx = new EthereumTx(txData);
const privateKeyBuffer = new Buffer(configs.DISPENSER_PRIVATE_KEY as string, 'hex');
tx.sign(privateKeyBuffer);
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);
},
};
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