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import ABI = require('ethereumjs-abi');
import ethUtil = require('ethereumjs-util');
import * as _ from 'lodash';
import * as Web3 from 'web3';
import { ContractInstance, TransactionDataParams } from './types';
export class MultiSigWrapper {
private _multiSig: ContractInstance;
public static encodeFnArgs(name: string, abi: Web3.AbiDefinition[], args: any[]) {
const abiEntity = _.find(abi, { name }) as Web3.MethodAbi;
if (_.isUndefined(abiEntity)) {
throw new Error(`Did not find abi entry for name: ${name}`);
}
const types = _.map(abiEntity.inputs, input => input.type);
const funcSig = ethUtil.bufferToHex(ABI.methodID(name, types));
const argsData = _.map(args, arg => {
const target = _.isBoolean(arg) ? +arg : arg;
const targetBuff = ethUtil.toBuffer(target);
return ethUtil.setLengthLeft(targetBuff, 32).toString('hex');
});
return funcSig + argsData.join('');
}
constructor(multiSigContractInstance: ContractInstance) {
this._multiSig = multiSigContractInstance;
}
public async submitTransactionAsync(
destination: string,
from: string,
dataParams: TransactionDataParams,
value: number = 0,
) {
const { name, abi, args = [] } = dataParams;
const encoded = MultiSigWrapper.encodeFnArgs(name, abi, args);
return this._multiSig.submitTransaction(destination, value, encoded, {
from,
});
}
}
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