Zarinpal API in Go

Please read zarinpal docs first

Installation

go get github.com/xbozorg/zarinpal-api

0 - Import

import "github.com/xbozorg/zarinpal-api"

1 - Zarinpal instance

const (
	merchantID = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" // 36 characters
	sandbox    = true
)
// new zarinpal instance
var z = zarinpal.New(merchantID, sandbox) 

2 - Payment Request Data

PaymentRequestData := zarinpal.PaymentRequest{
    MerchantID:  z.MerchantID,
    Amount:      110000,
    Description: "test",
    CallbackURL: "http://example.com/payment/check",
}

3 - Payment Request

PaymentResponseData, err := z.PaymentRequest(
    PaymentRequestData, 
    zarinpal.ValidatePayment(),
)

4 - Payment Gateway

Add Payment Response Data's Authority field in previous step to GatewayURL and give the link to user.

• Authority : 000000000000000000000000000000111111
• GatewayURL : https://sandbox.zarinpal.com/pg/StartPay/

Payment Link : https://sandbox.zarinpal.com/pg/StartPay/000000000000000000000000000000111111

5 - Payment Verification Data

Get Status and Authority query parameter values at the end of your CallbackURL:

• CallbackURL -> https://example.com/payment/check
• Zarinpal redirects to -> https://example.com/payment/check?Authority=exampleAurhority&Status=exampleStatus

verificationRequestData := zarinpal.PaymentVerificationRequest{
    MerchantID: z.MerchantID,
    Amount:     110000,
    Authority:  "000000000000000000000000000000111111",
}

6 - Payment Verification

verificationResponse, err := z.PaymentVerification(
    verificationRequestData,
    zarinpal.ValidatePaymentVerification(),
)

7 - Check Verification Response

If verificationResponse's Status field == 100 or 101 it means that the payment was successful.

• Status = 100 : Successful / First Verification
• Status = 101 : Successful / Already Verified

---

Error Codes

Code 10 -> payment validator
Code 11 -> payment marshaling
Code 12 -> new payment request
Code 13 -> send payment request
Code 14 -> read payment response body
Code 15 -> unmarshaling payment response
	
Code 30 -> verification validator
Code 31 -> verification marshaling
Code 32 -> new verification request
Code 33 -> send verification request
Code 34 -> read verification response
Code 35 -> unmarshaling verification response

Error handling

if err != nil {
    if err.(zarinpal.Err).Code == 10 {
        // ...
    }
    if err.(zarinpal.Err).Code == 11 {
        // ...
    }
}