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.