sign method
Implementation
String sign({
required Object timestamp,
required String paymentId,
required num amount,
required String externalUserId,
required String status,
}) {
return signPaymentWebhook(
secret: secret,
paymentId: paymentId,
amount: amount,
externalUserId: externalUserId,
status: status,
timestamp: int.tryParse(timestamp.toString()),
).signature;
}