classic-ui/modules/account/store/getters/Contract.js

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2022-04-22 06:05:56 +03:00
import Web3 from 'web3'
const ABI = [
{
anonymous: false,
inputs: [
{ indexed: true, internalType: 'address', name: 'who', type: 'address' },
{ indexed: false, internalType: 'bytes', name: 'data', type: 'bytes' }
],
name: 'Echo',
type: 'event'
},
{
inputs: [{ internalType: 'bytes', name: '_data', type: 'bytes' }],
name: 'echo',
outputs: [],
stateMutability: 'nonpayable',
type: 'function'
}
]
export class EchoContract {
constructor({ rpcUrl, address }) {
this.web3 = new Web3(rpcUrl)
this.contract = new this.web3.eth.Contract(ABI, address)
this.address = this.contract._address
}
async getEvents({ address, fromBlock = 0, toBlock = 'latest' }) {
try {
return await this.contract.getPastEvents('Echo', {
toBlock,
fromBlock,
filter: { who: address }
})
} catch (err) {
throw new Error(`Method getEvents has error: ${err.message}`)
}
}
async estimateGas({ from, data }) {
try {
return await this.contract.methods.echo(data).estimateGas({ from })
} catch (err) {
throw new Error(`Method estimateGas has error: ${err.message}`)
}
}
getCallData(data) {
try {
return this.contract.methods.echo(data).encodeABI()
} catch (err) {
throw new Error(`Method getCallData has error: ${err.message}`)
}
}
}