@arbitrum/sdk
Version:
Typescript library client-side interactions with Arbitrum
59 lines (58 loc) • 2.22 kB
JavaScript
/*
* Copyright 2021, Offchain Labs, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* eslint-env node */
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.EventFetcher = void 0;
const ethers_1 = require("ethers");
/**
* Fetches and parses blockchain logs
*/
class EventFetcher {
constructor(provider) {
this.provider = provider;
}
/**
* Fetch logs and parse logs
* @param contractFactory A contract factory for generating a contract of type TContract at the addr
* @param topicGenerator Generator function for creating
* @param filter Block and address filter parameters
* @returns
*/
async getEvents(contractFactory, topicGenerator, filter) {
const contract = contractFactory.connect(filter.address || ethers_1.constants.AddressZero, this.provider);
const eventFilter = topicGenerator(contract);
const fullFilter = Object.assign(Object.assign({}, eventFilter), { address: filter.address, fromBlock: filter.fromBlock, toBlock: filter.toBlock });
const logs = await this.provider.getLogs(fullFilter);
return logs
.filter(l => l.removed === false)
.map(l => {
const pLog = contract.interface.parseLog(l);
return {
event: pLog.args,
topic: pLog.topic,
name: pLog.name,
blockNumber: l.blockNumber,
blockHash: l.blockHash,
transactionHash: l.transactionHash,
address: l.address,
topics: l.topics,
data: l.data,
};
});
}
}
exports.EventFetcher = EventFetcher;