diff --git a/go.mod b/go.mod
index 5d54861..bb95f95 100644
--- a/go.mod
+++ b/go.mod
@@ -2,12 +2,10 @@ module github.com/NdoleStudio/coinpayments-go
 
 go 1.18
 
-require (
-	github.com/davecgh/go-spew v1.1.1
-	github.com/stretchr/testify v1.7.1
-)
+require github.com/stretchr/testify v1.7.1
 
 require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
 )
diff --git a/internal/helpers/test_helper.go b/internal/helpers/test_helper.go
index 04542dc..ffd5b2c 100644
--- a/internal/helpers/test_helper.go
+++ b/internal/helpers/test_helper.go
@@ -40,4 +40,4 @@ func MakeRequestCapturingTestServer(responseCode int, response []byte, request *
 			panic(err)
 		}
 	}))
-}
\ No newline at end of file
+}
diff --git a/payment_service_test.go b/payment_service_test.go
index e13d43f..18c0454 100644
--- a/payment_service_test.go
+++ b/payment_service_test.go
@@ -2,13 +2,14 @@ package coinpayments
 
 import (
 	"context"
-	"github.com/NdoleStudio/coinpayments-go/internal/helpers"
-	"github.com/NdoleStudio/coinpayments-go/internal/stubs"
-	"github.com/stretchr/testify/assert"
 	"io/ioutil"
 	"net/http"
 	"net/url"
 	"testing"
+
+	"github.com/NdoleStudio/coinpayments-go/internal/helpers"
+	"github.com/NdoleStudio/coinpayments-go/internal/stubs"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestPaymentService_CreateTransaction_Request(t *testing.T) {
@@ -82,7 +83,7 @@ func TestPaymentService_CreateTransaction_Ok(t *testing.T) {
 			Amount:         "1.00000000",
 			Address:        "ZZZ",
 			DestTag:        "YYY",
-			TxnID:          "XXX",
+			TransactionID:  "XXX",
 			ConfirmsNeeded: "10",
 			Timeout:        9000,
 			CheckoutURL:    "https://www.coinpayments.net/index.php?cmd=checkout&id=XXX&key=ZZZ",
diff --git a/payments.go b/payments.go
index 02410b9..1108ad7 100644
--- a/payments.go
+++ b/payments.go
@@ -1,15 +1,17 @@
 package coinpayments
 
+// CreatePaymentResponse is the api response after creating a payment
 type CreatePaymentResponse struct {
 	Error  string              `json:"error"`
 	Result CreatePaymentResult `json:"result"`
 }
 
+// CreatePaymentResult is the result of creating a payment
 type CreatePaymentResult struct {
 	Amount         string `json:"amount"`
 	Address        string `json:"address"`
 	DestTag        string `json:"dest_tag"`
-	TxnID          string `json:"txn_id"`
+	TransactionID  string `json:"txn_id"`
 	ConfirmsNeeded string `json:"confirms_needed"`
 	Timeout        int    `json:"timeout"`
 	CheckoutURL    string `json:"checkout_url"`
@@ -17,9 +19,31 @@ type CreatePaymentResult struct {
 	QrcodeURL      string `json:"qrcode_url"`
 }
 
+// CreatePaymentRequest are the parameters for creating a payment
 type CreatePaymentRequest struct {
 	Amount           string `json:"amount"`
 	OriginalCurrency string `json:"currency1"`
 	SendingCurrency  string `json:"currency2"`
 	BuyerEmail       string `json:"buyer_email"`
 }
+
+// PaymentIpnRequest is the response we expect back from the server when the command is "api"
+type PaymentIpnRequest struct {
+	Status           string `json:"status"`
+	StatusText       string `json:"status_text"`
+	TxnID            string `json:"txn_id"`
+	Currency1        string `json:"currency1"`
+	Currency2        string `json:"currency2"`
+	Amount1          string `json:"amount1"`
+	Amount2          string `json:"amount2"`
+	Fee              string `json:"fee"`
+	BuyerName        string `json:"buyer_name"`
+	Email            string `json:"email"`
+	ItemName         string `json:"item_name"`
+	ItemNumber       string `json:"item_number"`
+	Invoice          string `json:"invoice"`
+	Custom           string `json:"custom"`
+	SendTX           string `json:"send_tx"` // the tx id of the payment to the merchant. only included when 'status' >= 100 and the payment mode is set to ASAP or nightly or if the payment is paypal passthru
+	ReceivedAmount   string `json:"received_amount"`
+	ReceivedConfirms string `json:"received_confirms"`
+}