import { AbiDefinition, MethodAbi } from '@0xproject/types'; import { BigNumber } from '@0xproject/utils'; import ABI = require('ethereumjs-abi'); import ethUtil = require('ethereumjs-util'); import * as _ from 'lodash'; import * as Web3 from 'web3'; import { MultiSigWalletContract } from '../contract_wrappers/generated/multi_sig_wallet'; import { TransactionDataParams } from './types'; export class MultiSigWrapper { private _multiSig: MultiSigWalletContract; public static encodeFnArgs(name: string, abi: AbiDefinition[], args: any[]): string { const abiEntity = _.find(abi, { name }) as 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(multiSigContract: MultiSigWalletContract) { this._multiSig = multiSigContract; } public async submitTransactionAsync( destination: string, from: string, dataParams: TransactionDataParams, value: BigNumber = new BigNumber(0), ): Promise { const { name, abi, args = [] } = dataParams; const encoded = MultiSigWrapper.encodeFnArgs(name, abi, args); return this._multiSig.submitTransaction.sendTransactionAsync(destination, value, encoded, { from, }); } }