Payment Nepal SDK for Golang

Flow of Esewa

• Get the merchant account credentials (Secret to sign the payload)
• Sign the payload using secret
• If signature you generate using the secret key matches you will be redirect to the Esewa payment page
• Complete the payment
• On payment success you will be redirected to the success_url you have provided
• On payment failure you will be redirected to the failure_url you have provided
• In redirected url the data query param will be appended (which is base64 encoded text)

Integrate Esewa with ease

• Install Dependency

go get github.com/mukezhz/pay-np/esewa@latest

• Initialize the config for esewa

secret := "8gBm/:&EnhH.1/q"
payload := &esewa.EsewaPayload{
		Amount:                "100",
		TaxAmount:             "13",
		TotalAmount:           "133",
		TransactionUUID:       "1234567890", // this should be unique for each transaction
		ProductServiceCharge:  "10",
		ProductDeliveryCharge: "10",
		ProductCode:           "EPAYTEST",
		SuccessURL:            "http://localhost:8000/success",
		FailureURL:            "http://localhost:8000/failure",
		SignedFieldNames:      "total_amount,transaction_uuid,product_code",
		Signature:             "",
	}
e, err := esewa.New(secret, payload)
if err != nil {
  fmt.Println(err)
}

• Generate the signature

s, err := e.GenerateSignature()
if err != nil {
 	fmt.Println(err)
}

• Pass the signature obtained to Esewa URL[this is dev url]
• After payment you will get the data in the redirected url
• Use that base64 encoded text to verify weather the payload in changed or not

err = e.VerifySignature("eyJ0cmFuc2FjdGlvbl9jb2RlIjoiMDAwNlRZMyIsInN0YXR1cyI6IkNPTVBMRVRFIiwidG90YWxfYW1vdW50IjoiMTMzLjAiLCJ0cmFuc2FjdGlvbl91dWlkIjoiMTIzNDU2Nzg5MCIsInByb2R1Y3RfY29kZSI6IkVQQVlURVNUIiwic2lnbmVkX2ZpZWxkX25hbWVzIjoidHJhbnNhY3Rpb25fY29kZSxzdGF0dXMsdG90YWxfYW1vdW50LHRyYW5zYWN0aW9uX3V1aWQscHJvZHVjdF9jb2RlLHNpZ25lZF9maWVsZF9uYW1lcyIsInNpZ25hdHVyZSI6Ik1GRWNNWi8zMFdWZXphblZaSEg0SDFuSVY4cEd3eXpaeGdndGt5ZTJWWHc9In0=")
if err != nil {
  fmt.Println(err)
}

Note: For complete reference please visit official docs here

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THANK YOU 🙏