withdrawERC20

Withdraw ERC-20 tokens from one user and returns a Voucher to the recipient on L1. The voucher still need to be created through a createVoucher call.

Usage

The following example withdraws the entire CTSI balance of the user who is submitting an input to the application.

import { createApp } from "@deroll/app";
import { createWallet } from "@deroll/wallet";
 
// create app
const app = createApp({ url: "http://127.0.0.1:5004" });
 
// create wallet
const wallet = createWallet();
 
app.addAdvanceHandler(wallet.handler);
 
const token = "0x491604c0FDF08347Dd1fa4Ee062a822A5DD06B5D"; // CTSI address
app.addAdvanceHandler(async ({ metadata }) => {
    const user = metadata.msg_sender;
    const value = wallet.erc20BalanceOf(token, user);
    if (value > 0) {
        const voucher = wallet.withdrawERC20(token, user, value); 
        await app.createVoucher(voucher);
    }
    return "accept";
});

Returns

Type: Voucher

Parameters

Type: Address

Address of ERC-20 token.

Type: string

User to withdraw from.

Type: bigint

Amount to withdraw.