send.ts

import bs58 from 'bs58'
import { BigNumber } from 'ethers'
import { task, types } from 'hardhat/config'
import { ActionType, HardhatRuntimeEnvironment } from 'hardhat/types'

import { makeBytes32 } from '@layerzerolabs/devtools'
import { EndpointId } from '@layerzerolabs/lz-definitions'

import { getLayerZeroScanLink } from '../solana'

interface TaskArguments {
    dstEid: number
    amount: string
    to: string
    contractName: string
    erc20Address: string
}

const action: ActionType<TaskArguments> = async (
    { dstEid, amount, to, contractName, erc20Address },
    hre: HardhatRuntimeEnvironment
) => {
    const signer = await hre.ethers.getNamedSigner('deployer')
    // @ts-ignore
    const token = (await hre.ethers.getContract(contractName)).connect(signer)

    // @ts-ignore
    const erc20Token = (await hre.ethers.getContractAt('IERC20', erc20Address)).connect(signer)
    const allowance = await erc20Token.allowance(signer.address, token.address)

    if (allowance < amount) {
        const approvalTxResponse = await erc20Token.approve(token.address, amount)
        const approvalTxReceipt = await approvalTxResponse.wait()
        console.log(`approve: ${amount}: ${approvalTxReceipt.transactionHash}`)
    }

    const amountLD = BigNumber.from(amount)
    const sendParam = {
        dstEid,
        to: makeBytes32(bs58.decode(to)),
        amountLD: amountLD.toString(),
        minAmountLD: amountLD.mul(9_000).div(10_000).toString(),
        extraOptions: '0x',
        composeMsg: '0x',
        oftCmd: '0x',
    }
    const [msgFee] = await token.functions.quoteSend(sendParam, false)
    const txResponse = await token.functions.send(sendParam, msgFee, signer.address, {
        value: msgFee.nativeFee,
        gasLimit: 500_000,
    })
    const txReceipt = await txResponse.wait()
    console.log(`send: ${amount} to ${to}: ${txReceipt.transactionHash}`)
    console.log(
        `Track cross-chain transfer here: ${getLayerZeroScanLink(txReceipt.transactionHash, dstEid == EndpointId.SOLANA_V2_TESTNET)}`
    )
}

task('send', 'Sends a transaction', action)
    .addParam('dstEid', 'Destination endpoint ID', undefined, types.int, false)
    .addParam('amount', 'Amount to send in wei', undefined, types.string, false)
    .addParam('to', 'Recipient address', undefined, types.string, false)
    .addParam('erc20Address', 'ERC20 address', undefined, types.string, false)
    .addOptionalParam('contractName', 'Name of the contract in deployments folder', 'VirtualOFTAdapter', types.string)