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charge.go
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charge.go
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package server
import (
"net/http"
"strings"
"time"
"github.com/go-chi/chi"
"github.com/go-chi/render"
"github.com/pkg/errors"
"github.com/rsoury/buyte/buyte"
"github.com/rsoury/buyte/pkg/paymentgateway"
"github.com/rsoury/buyte/pkg/user"
"github.com/rsoury/buyte/store"
)
func (s *Server) CreateCharge() http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// Decode input
input := &buyte.CreateChargeInput{}
if err := render.DecodeJSON(r.Body, input); err != nil {
_ = render.Render(w, r, s.ErrInvalidRequest(err))
return
}
// Validate input
if input.Source == "" || input.Amount <= 0 {
_ = render.Render(w, r, s.ErrInvalidRequestWithMessage(errors.New("Missing required parameters")))
return
}
if input.Amount <= 50 {
_ = render.Render(w, r, s.ErrInvalidRequestWithMessage(errors.New("Amount must be greater than 50 cents")))
return
}
if input.Currency == "" {
input.Currency = "aud"
}
// Get Payment Token Data
paymentToken, err := s.store.GetPaymentToken(r.Context(), input.Source)
if err != nil {
s.logger.Warnw("Create Charge", "error", errors.Wrap(err, "Cannot get Payment Token"))
_ = render.Render(w, r, s.ErrInvalidRequest(err))
return
}
// Validate amount in input
// In the future, you'd allow for partial payments... ie input.Amount <= paymentToken.Amount
// TODO: Add a way to include meaningful error message for production...
if input.Amount != paymentToken.Amount {
_ = render.Render(w, r, s.ErrInvalidRequestWithMessage(errors.New("Amount does not equal amount in authorized payment.")))
return
}
if !strings.EqualFold(input.Currency, paymentToken.Currency) {
_ = render.Render(w, r, s.ErrInvalidRequestWithMessage(errors.New("Currency does not equal currency in authorized payment.")))
return
}
s.logger.Infow("Create Charge", "token", paymentToken.ID, "message", "Passed validation")
// Once validated, Get User
u := user.FromContext(r.Context())
// Create the charge params
customer := paymentToken.Customer()
params := &buyte.CreateChargeParams{
Source: paymentToken.ID,
Amount: input.Amount,
Currency: input.Currency,
Captured: true,
Description: input.Description,
Customer: customer,
CreatedAt: time.Now().Format(time.RFC3339),
}
err = params.SetMetadata(input.Metadata)
if err != nil {
_ = render.Render(w, r, s.ErrInternalServer(err))
return
}
err = params.SetOrder(&input.Order)
if err != nil {
_ = render.Render(w, r, s.ErrInternalServer(err))
return
}
s.logger.Infow("Create Charge", "token", paymentToken.ID, "message", "Charge params created.")
s.logger.Debugw("Create Charge", "params", params)
var networkToken *buyte.NetworkToken
var nativeToken string
if paymentToken.IsApplePay() {
// Decrypt Apple Pay Token
applePayPaymentToken, err := paymentToken.ApplePay()
if err != nil {
_ = render.Render(w, r, s.ErrInternalServer(err))
return
}
applePayNetworkToken, err := s.applepay.DecryptResponse(applePayPaymentToken.Response)
if err != nil {
if paymentToken.IsRejectedSigningTimeDelta(err) {
_ = render.Render(w, r, s.ErrRequestFailed(err))
return
} else {
_ = render.Render(w, r, s.ErrInternalServer(err))
return
}
}
networkToken = &buyte.NetworkToken{
applePayNetworkToken,
}
} else if paymentToken.IsGooglePay() {
// Extract Native token
googlePayPaymentToken, err := paymentToken.GooglePay()
if err != nil {
_ = render.Render(w, r, s.ErrInternalServer(err))
return
}
nativeToken = googlePayPaymentToken.Response.PaymentMethodData.TokenizationData.Token
} else {
_ = render.Render(w, r, s.ErrInternalServer(errors.New("Payment Token type not valid")))
return
}
s.logger.Infow("Create Charge", "message", "Network/Native token attained.")
// Get Payment Provider from used Checkout
// s.logger.Debugw("Create Charge", "Token", paymentToken)
paymentProvider, err := paymentgateway.New(r.Context(), paymentToken.Checkout.Connection)
if err != nil {
_ = render.Render(w, r, s.ErrInternalServer(err))
return
}
// Check if provider is connect or not. Connect is now the keyword for our locally used Payment Provider.
if paymentProvider.Gateway.IsConnect() {
// Set fee amount
params.SetFee(u.UserAttributes.FeeMultiplier, u.UserAttributes.Country)
input.SetFee(u.UserAttributes.FeeMultiplier, u.UserAttributes.Country)
s.logger.Infow("Create Charge", "message", "Fee applied")
}
// Execute Charge on Payment Provider
var result *buyte.GatewayCharge
if nativeToken != "" {
result, err = paymentProvider.Gateway.ChargeNative(input, nativeToken, paymentToken)
if err != nil {
_ = render.Render(w, r, s.ErrInternalServer(err))
return
}
s.logger.Infow("Create Charge", "message", "Gateway charge executed successfully", "type", "native")
} else {
result, err = paymentProvider.Gateway.Charge(input, networkToken, paymentToken)
if err != nil {
_ = render.Render(w, r, s.ErrInternalServer(err))
return
}
s.logger.Infow("Create Charge", "message", "Gateway charge executed successfully", "type", "network")
}
params.SetProviderCharge(result)
// Return Charge
charge, err := s.store.CreateCharge(r.Context(), params)
if err != nil {
s.logger.Errorw("Create Charge", "Params", params)
_ = render.Render(w, r, s.ErrInternalServer(err))
return
}
if paymentProvider.Gateway.IsConnect() {
// Increment account balance.
go func() {
newBalance := charge.Amount - charge.FeeAmount
err = u.IncrementAccountBalance(newBalance)
if err != nil {
s.logger.Errorw("Create Charge", "Incrementing Account Balance", err, "Charge", charge.ID, "New Balance", newBalance)
} else {
s.logger.Infow("Create Charge", "Incrementing Account Balance", "Success", "Charge", charge.ID, "New Balance", newBalance)
}
}()
}
s.logger.Infow("Create Charge", "Charge", charge.ID, "Gateway Charge", result.Reference, "Payment Token", paymentToken.ID)
// Return Charge
render.JSON(w, r, charge)
}
}
func (s *Server) GetCharge() http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
chargeId := chi.URLParam(r, "id")
charge, err := s.store.GetCharge(r.Context(), chargeId)
if err != nil {
if store.IsConnectionUnauthorized(err) {
_ = render.Render(w, r, ErrNotFound)
} else {
_ = render.Render(w, r, s.ErrInternalServer(err))
}
return
}
if charge.ID == "" {
_ = render.Render(w, r, ErrNotFound)
return
}
s.logger.Infow("Get Charge", "Charge", charge.ID)
render.JSON(w, r, charge)
}
}