58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
import Web3 from 'web3'
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const ABI = [
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{
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anonymous: false,
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inputs: [
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{ indexed: true, internalType: 'address', name: 'who', type: 'address' },
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{ indexed: false, internalType: 'bytes', name: 'data', type: 'bytes' }
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],
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name: 'Echo',
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type: 'event'
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},
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{
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inputs: [{ internalType: 'bytes', name: '_data', type: 'bytes' }],
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name: 'echo',
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outputs: [],
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stateMutability: 'nonpayable',
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type: 'function'
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}
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]
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export class EchoContract {
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constructor({ rpcUrl, address }) {
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this.web3 = new Web3(rpcUrl)
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this.contract = new this.web3.eth.Contract(ABI, address)
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this.address = this.contract._address
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}
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async getEvents({ address, fromBlock = 0, toBlock = 'latest' }) {
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try {
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return await this.contract.getPastEvents('Echo', {
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toBlock,
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fromBlock,
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filter: { who: address }
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})
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} catch (err) {
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throw new Error(`Method getEvents has error: ${err.message}`)
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}
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}
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async estimateGas({ from, data }) {
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try {
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return await this.contract.methods.echo(data).estimateGas({ from })
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} catch (err) {
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throw new Error(`Method estimateGas has error: ${err.message}`)
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}
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}
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getCallData(data) {
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try {
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return this.contract.methods.echo(data).encodeABI()
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} catch (err) {
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throw new Error(`Method getCallData has error: ${err.message}`)
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}
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}
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}
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