ERC20 (DAI, REQ etc.. )

This section describe how the payments and the refunds detection are made using ERC20 as currency of a request.

The balance of an ERC20 Request can be computed automatically.

First, One address for the payment and one for the refund must be created and used exclusively for one and only one request.

Then, the payment network "pn-erc20-address-based" must be given when creating an ERC20 request:

const requestParameters = {
currency: 'REQ',
expectedAmount: '1000000000000000000',
payee: {
type: IdentityTypes.TYPE.ETHEREUM_ADDRESS,
value: '0x627306090abab3a6e1400e9345bc60c78a8bef57',
},
};
const paymentNetwork = {
id: RequestNetwork.Types.PAYMENT_NETWORK_ID.ERC20_ADDRESS_BASED,
parameters: {
paymentAddress: '0xf17f52151EbEF6C7334FAD080c5704D77216b732',
}
};
const invoice = await requestNetwork.createRequest({
requestParameters,
signer: requestParameters.payee,
paymentNetwork
});

Any ERC20 transaction for the request currency reaching the payment address given (here REQ and 0xf17f52151EbEF6C7334FAD080c5704D77216b732) is considered as a payment.

In the same way, the payer can add a refund address. For example when accepting the request:

await request.accept(payerIdentity, {
refundAddress: '0xC5fdf4076b8F3A5357c5E395ab970B5B54098Fef',
});

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