What payment methods have you integrated into fiat?

In integrating fiat payment methods, I worked with several popular systems: bank cards (Visa, MasterCard via processors like Stripe, Adyen), electronic wallets (PayPal, WebMoney), as well as local payment systems, for example, Yandex.Money and QIWI. An important aspect was implementing secure storage and transmission of data, compliance with PCI DSS, and handling webhook notifications to update payment statuses.

Example of integrating with Stripe in Go:

package main

import (
	"fmt"
	"github.com/stripe/stripe-go"
	"github.com/stripe/stripe-go/paymentintent"
)

func createPaymentIntent(amount int64, currency string) (*stripe.PaymentIntent, error) {
	stripe.Key = "sk_test_..."
	params := &stripe.PaymentIntentParams{
		Amount:   stripe.Int64(amount),
		Currency: stripe.String(currency),
	}
	return paymentintent.New(params)
}

func main() {
	pi, err := createPaymentIntent(1000, "usd")
	if err != nil {
		fmt.Println("Error creating payment intent:", err)
		return
	}
	fmt.Println("PaymentIntent created with ID:", pi.ID)
}