Midtrans Library for Go(lang)

Midtrans ❤️ Go !

Go is a very modern, terse, and combine aspect of dynamic and static typing that in a way very well suited for web development, among other things. Its small memory footprint is also an advantage of itself. Now, Midtrans is available to be used in Go, too.

Usage blueprint

1. There is a type named Client (midtrans.Client) that should be instantiated through NewClient which hold any possible setting to the library.
2. There is a gateway classes which you will be using depending on whether you used Core, SNAP, SNAP-Redirect. The gateway type need a Client instance.
3. Any activity (charge, approve, etc) is done in the gateway level.

Example

We have attached usage examples in this repository in folder example/simplepay. Please proceed there for more detail on how to run the example.

Core Gateway

    midclient := midtrans.NewClient()
    midclient.ServerKey = "YOUR-VT-SERVER-KEY"
    midclient.ClientKey = "YOUR-VT-CLIENT-KEY"
    midclient.APIEnvType = midtrans.Sandbox

    coreGateway := midtrans.CoreGateway{
        Client: midclient,
    }

    chargeReq := &midtrans.ChargeReq{
        PaymentType: midtrans.SourceCreditCard,
        TransactionDetails: midtrans.TransactionDetails{
            OrderID: "12345",
            GrossAmt: 200000,
        },
        CreditCard: &midtrans.CreditCardDetail{
            TokenID: "YOUR-CC-TOKEN",
        },
        Items: &[]midtrans.ItemDetail{
            midtrans.ItemDetail{
                ID: "ITEM1",
                Price: 200000,
                Qty: 1,
                Name: "Someitem",
            },
        },
    }

    resp, _ := coreGateway.Charge(chargeReq)

How Core API does charge with map type

please refer to file main.go in folder example/simplepay

func ChargeWithMap(w http.ResponseWriter, r *http.Request) {
	var reqPayload = &midtrans.ChargeReqWithMap{}
	err := json.NewDecoder(r.Body).Decode(reqPayload)
	if err != nil {
		// do something
		return
	}
	
	chargeResp, _ := coreGateway.ChargeWithMap(reqPayload)
	result, err := json.Marshal(chargeResp)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	w.Write(result)
}

Snap Gateway

Snap is Midtrans existing tool to help merchant charge customers using a mobile-friendly, in-page, no-redirect checkout facilities. Using snap is completely simple.

Quick transaction with minimum Snap parameters:

var snapGateway midtrans.SnapGateway
snapGateway = midtrans.SnapGateway{
  Client: midclient,
}

snapResp, err := snapGateway.GetTokenQuick(generateOrderId(), 200000)
var snapToken string
if err != nil {
  snapToken = snapResp.Token
}

On the client side:

var token = $("#snap-token").val();
snap.pay(token, {
    onSuccess: function(res) { alert("Payment accepted!"); },
    onPending: function(res) { alert("Payment pending", res); },
    onError: function(res) { alert("Error", res); }
});

You may want to override those onSuccess, onPending and onError functions to reflect the behaviour that you wished when the charging result in their respective state.

Alternativelly, more complete Snap parameter:

    midclient := midtrans.NewClient()
    midclient.ServerKey = "YOUR-VT-SERVER-KEY"
    midclient.ClientKey = "YOUR-VT-CLIENT-KEY"
    midclient.APIEnvType = midtrans.Sandbox

    var snapGateway midtrans.SnapGateway
    snapGateway = midtrans.SnapGateway{
        Client: midclient,
    }

    custAddress := &midtrans.CustAddress{
        FName: "John",
        LName: "Doe",
        Phone: "081234567890",
        Address: "Baker Street 97th",
        City: "Jakarta",
        Postcode: "16000",
        CountryCode: "IDN",
    }

    snapReq := &midtrans.SnapReq{
        TransactionDetails: midtrans.TransactionDetails{
            OrderID: "order-id-go-"+timestamp,
            GrossAmt: 200000,
        },
        CustomerDetail: &midtrans.CustDetail{
            FName: "John",
            LName: "Doe",
            Email: "john@doe.com",
            Phone: "081234567890",
            BillAddr: custAddress,
            ShipAddr: custAddress,
        },
        Items: &[]midtrans.ItemDetail{
            midtrans.ItemDetail{
                ID: "ITEM1",
                Price: 200000,
                Qty: 1,
                Name: "Someitem",
            },
        },
    }

    log.Println("GetToken:")
    snapTokenResp, err := snapGateway.GetToken(snapReq)

Handle HTTP Notification

Create separated web endpoint (notification url) to receive HTTP POST notification callback/webhook. HTTP notification will be sent whenever transaction status is changed. Example also available in main.go in folder example/simplepay

func notification(w http.ResponseWriter, r *http.Request) {
	var reqPayload = &midtrans.ChargeReqWithMap{}
	err := json.NewDecoder(r.Body).Decode(reqPayload)
	if err != nil {
		// do something
		return
	}

	encode, _ := json.Marshal(reqPayload)
	resArray := make(map[string]string)
	err = json.Unmarshal(encode, &resArray)

	chargeResp, _ := coreGateway.StatusWithMap(resArray["order_id"])
	result, err := json.Marshal(chargeResp)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	w.Write(result)
}

Iris Gateway

Iris is Midtrans cash management solution that allows you to disburse payments to any bank accounts in Indonesia securely and easily. Iris connects to the banks’ hosts to enable seamless transfer using integrated APIs.

Note: ServerKey used for irisGateway's Client is API Key found in Iris Dashboard. The API Key is different with Midtrans' payment gateway account's key.

var irisGateway midtrans.IrisGateway
irisGateway = midtrans.IrisGateway{
  Client: midclient,
}

res, err := irisGateway.GetListBeneficiaryBank()
if err != nil {
    fmt.Println("err ", err)
    return
}
fmt.Printf("result %v \n ", res.BeneficiaryBanks)

Change log

• Use go modules
• Add ability to set HTTP client
• Use function options for constructing a new client

License

See LICENSE.