dai.ts

import { Providers, Contract } from '@jelly-swap/erc20';
import { DAI_CONFIG } from './config';

export const withdraw = async ({ id, secret, tokenAddress }) => {
    const config = DAI_CONFIG();

    const privateKey = 'PRIVATE_KEY';
    const provider = new Providers.WalletProvider(privateKey, config.providerUrl); // web wallet
    const contract = new Contract(provider, config);

    const txHash = await contract.withdraw({ id, secret, tokenAddress });

    return txHash;
};

const onErc20Event = (result) => {
    console.log(result);

    switch (result.eventName) {
        case 'NEW_CONTRACT': {
            if (result.isSesnder) {
                // in AdEX case this won't happen, because user's won't send DAI, only BTC
            } else {
                // Handle DAI withdraw here.
            }
            break;
        }

        case 'WITHDRAW': {
            // logic for when user's DAI withdraw is confirmed
            break;
        }
    }
};

export const subscribe = (contract, userDAIAddress) => {
    contract.subscribe(onErc20Event, {
        new: {
            receiver: userDAIAddress,
        },
        withdraw: {
            receiver: userDAIAddress,
        },
    });
};