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