36 lines
1.7 KiB
TypeScript
36 lines
1.7 KiB
TypeScript
import * as _ from 'lodash';
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import * as Web3 from 'web3';
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import {Web3Wrapper} from '../web3_wrapper';
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import {AbiDecoder} from '../utils/abi_decoder';
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import {ZeroExError, Artifact, LogWithDecodedArgs, RawLog, ContractEvents} from '../types';
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import {utils} from '../utils/utils';
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export class ContractWrapper {
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protected _web3Wrapper: Web3Wrapper;
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private _abiDecoder?: AbiDecoder;
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constructor(web3Wrapper: Web3Wrapper, abiDecoder?: AbiDecoder) {
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this._web3Wrapper = web3Wrapper;
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this._abiDecoder = abiDecoder;
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}
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protected tryToDecodeLogOrNoOp(log: Web3.LogEntry): LogWithDecodedArgs|RawLog {
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if (_.isUndefined(this._abiDecoder)) {
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throw new Error(ZeroExError.NoAbiDecoder);
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}
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const logWithDecodedArgs = this._abiDecoder.tryToDecodeLogOrNoOp(log);
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return logWithDecodedArgs;
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}
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protected async _instantiateContractIfExistsAsync<A extends Web3.ContractInstance>(artifact: Artifact,
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addressIfExists?: string,
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): Promise<A> {
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const contractInstance =
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await this._web3Wrapper.getContractInstanceFromArtifactAsync<A>(artifact, addressIfExists);
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return contractInstance;
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}
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protected _getEventSignatureFromAbiByName(abi: Web3.ContractAbi, eventName: ContractEvents): string {
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const eventAbi = _.filter(abi, {name: eventName})[0] as Web3.EventAbi;
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const types = _.map(eventAbi.inputs, 'type');
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const signature = `${eventAbi.name}(${types.join(',')})`;
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return signature;
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}
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}
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