erc20-payment.js

//specify the currency, amount and the recipient address
const payMonetaryAmount = nahmii.MonetaryAmount.from({
    currency: {
        ct: tokenInfo.currency,
        id: '0'
    },
    amount: ethers.utils.parseUnits(payAmount, tokenInfo.decimals)
});
const payment = new nahmii.Payment(payMonetaryAmount, wallet.address, recipientAddress, wallet);

//sign the transfer transaction using the wallet initiated the Payment object
await payment.sign();

//send the signed payment to our operator, it will response a receipt
await payment.register();