Reorganized code + migration to go1.22
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brajkovic committed
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commit
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25 files changed
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@@ -0,0 +1,416 @@
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package wspay
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import (
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"bytes"
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"crypto/sha512"
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"encoding/hex"
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"encoding/json"
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"errors"
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"fmt"
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"github.com/gin-gonic/gin"
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"github.com/google/uuid"
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"io"
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"log/slog"
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"net/http"
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"payment-poc/domain/database"
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"payment-poc/domain/state"
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"strconv"
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)
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type Service struct {
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ShopId string
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ShopSecret string
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BackendUrl string
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}
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func (s *Service) UpdatePayment(entry database.PaymentEntry) (updatedEntry database.PaymentEntry, err error) {
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var request = StatusCheckRequest{
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Version: "2.0",
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ShopID: s.ShopId,
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ShoppingCartId: entry.Id.String(),
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Signature: CalculateStatusCheckSignature(s.ShopId, s.ShopSecret, entry.Id.String()),
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}
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httpResponse, err := createRequest(
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"POST",
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"https://test.wspay.biz/api/services/statusCheck",
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map[string]string{"content-type": "application/json"},
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toJson(request),
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)
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if err != nil {
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return database.PaymentEntry{}, err
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}
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var response StatusCheckResponse
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err = readResponse(httpResponse, &response)
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if err != nil {
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return database.PaymentEntry{}, err
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}
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if CompareStatusCheckReturnSignature(response.Signature, s.ShopId, s.ShopSecret, response.ActionSuccess, response.ApprovalCode, entry.WsPayOrderId) == nil {
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newValue := int64(response.Amount * 100)
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entry.Amount = &newValue
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newState := determineState(response)
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if entry.State != newState && newState != "" {
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slog.Info("Updated state", "entry_id", entry.Id.String(), "state", entry.State, "new_state", newState)
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entry.State = newState
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}
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entry.WsPayOrderId = response.WsPayOrderId
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} else {
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return database.PaymentEntry{}, errors.New("invalid signature")
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}
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return entry, nil
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}
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func determineState(response StatusCheckResponse) state.PaymentState {
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if response.Completed == "1" {
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return state.StateCompleted
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} else if response.Voided == "1" {
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return state.StateVoided
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} else if response.Refunded == "1" {
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return state.StateVoided
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} else if response.Authorized == "1" {
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return state.StateAccepted
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} else {
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return state.StateInitialized
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}
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}
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func (s *Service) CreatePaymentUrl(entry database.PaymentEntry) (database.PaymentEntry, string, error) {
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entry, url, err := s.InitializePayment(entry)
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if err != nil {
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return entry, "", err
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}
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return entry, url, nil
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}
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func (s *Service) CompleteTransaction(entry database.PaymentEntry, amount int64) (database.PaymentEntry, error) {
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if entry.State == state.StateAccepted {
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var request = CompletionRequest{
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Version: "2.0",
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WsPayOrderId: entry.WsPayOrderId,
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ShopID: s.ShopId,
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ApprovalCode: *entry.ApprovalCode,
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STAN: *entry.STAN,
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Amount: strconv.FormatInt(amount, 10),
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Signature: CalculateCompletionSignature(s.ShopId, s.ShopSecret, entry.WsPayOrderId, *entry.STAN, *entry.ApprovalCode, amount),
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}
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httpResponse, err := createRequest(
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"POST",
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"https://test.wspay.biz/api/services/completion",
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map[string]string{"content-type": "application/json"},
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toJson(request),
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)
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if err != nil {
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return database.PaymentEntry{}, err
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}
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var response CompletionResponse
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err = readResponse(httpResponse, &response)
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if err != nil {
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return database.PaymentEntry{}, err
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}
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if CompareCompletionReturnSignature(response.Signature, s.ShopId, s.ShopSecret, *entry.STAN, response.ActionSuccess, response.ApprovalCode, entry.WsPayOrderId) == nil {
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entry.Amount = &amount
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entry.State = state.StateCompleted
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} else {
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return database.PaymentEntry{}, errors.New("invalid signature")
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}
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return entry, nil
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} else {
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return database.PaymentEntry{}, errors.New("payment is in invalid state")
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}
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}
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func (s *Service) CancelTransaction(entry database.PaymentEntry) (database.PaymentEntry, error) {
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if entry.State == state.StateAccepted {
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var request = CompletionRequest{
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Version: "2.0",
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WsPayOrderId: entry.WsPayOrderId,
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ShopID: s.ShopId,
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ApprovalCode: *entry.ApprovalCode,
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STAN: *entry.STAN,
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Amount: strconv.FormatInt(entry.TotalAmount, 10),
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Signature: CalculateCompletionSignature(s.ShopId, s.ShopSecret, entry.WsPayOrderId, *entry.STAN, *entry.ApprovalCode, entry.TotalAmount),
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}
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httpResponse, err := createRequest(
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"POST",
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"https://test.wspay.biz/api/services/void",
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map[string]string{"content-type": "application/json"},
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toJson(request),
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)
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if err != nil {
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return database.PaymentEntry{}, err
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}
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var response CompletionResponse
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err = readResponse(httpResponse, &response)
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if err != nil {
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return database.PaymentEntry{}, err
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}
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if CompareCompletionReturnSignature(response.Signature, s.ShopId, s.ShopSecret, *entry.STAN, response.ActionSuccess, response.ApprovalCode, entry.WsPayOrderId) == nil {
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entry.State = state.StateVoided
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} else {
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return database.PaymentEntry{}, errors.New("invalid signature")
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}
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return entry, nil
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} else {
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return database.PaymentEntry{}, errors.New("payment is in invalid state")
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}
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}
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func (s *Service) InitializePayment(entry database.PaymentEntry) (database.PaymentEntry, string, error) {
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formattedAmount := fmt.Sprintf("%d,%02d", entry.TotalAmount/100, entry.TotalAmount%100)
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var request = CreateTransaction{
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ShopID: s.ShopId,
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ShoppingCardID: entry.Id.String(),
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Version: "2.0",
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TotalAmount: formattedAmount,
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ReturnUrl: s.BackendUrl + "/wspay/success",
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ReturnErrorUrl: s.BackendUrl + "/wspay/error",
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CancelUrl: s.BackendUrl + "/wspay/cancel",
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Signature: CalculateFormSignature(s.ShopId, s.ShopSecret, entry.Id.String(), entry.TotalAmount),
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}
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httpResponse, err := createRequest(
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"POST",
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"https://formtest.wspay.biz/api/create-transaction",
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map[string]string{"content-type": "application/json"},
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toJson(request),
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)
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if err != nil {
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return database.PaymentEntry{}, "", err
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}
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var response TransactionResponse
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err = readResponse(httpResponse, &response)
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if err != nil {
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return database.PaymentEntry{}, "", err
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}
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if response.TransactionId == nil {
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return database.PaymentEntry{}, "", errors.New("received bad response")
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}
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entry.State = state.StateInitialized
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return entry, *response.PaymentFormUrl, nil
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}
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func (s *Service) HandleSuccessResponse(c *gin.Context, provider *database.PaymentEntryProvider) (string, error) {
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response := FormReturn{}
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if err := c.ShouldBind(&response); err != nil {
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return "", err
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}
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entry, err := provider.FetchById(uuid.MustParse(response.ShoppingCartID))
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if err != nil {
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return "", err
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}
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if err := CompareFormReturnSignature(response.Signature, s.ShopId, s.ShopSecret, response.ShoppingCartID, response.Success, response.ApprovalCode); err != nil {
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return "", err
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}
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entry.Lang = &response.Lang
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entry.ECI = &response.ECI
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entry.STAN = &response.STAN
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entry.Success = &response.Success
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entry.ApprovalCode = &response.ApprovalCode
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entry.State = state.StateAccepted
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entry.WsPayOrderId = response.WsPayOrderId
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if _, err := provider.UpdateEntry(entry); err != nil {
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return "", err
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}
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return "/entries/" + entry.Id.String(), nil
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}
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func (s *Service) HandleErrorResponse(c *gin.Context, provider *database.PaymentEntryProvider, paymentState state.PaymentState) (string, error) {
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response := FormError{}
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if err := c.ShouldBind(&response); err != nil {
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return "", err
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}
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entry, err := provider.FetchById(uuid.MustParse(response.ShoppingCartID))
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if err != nil {
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return "", err
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}
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if err := CompareFormReturnSignature(response.Signature, s.ShopId, s.ShopSecret, response.ShoppingCartID, response.Success, response.ApprovalCode); err != nil {
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return "", err
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}
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entry.Lang = &response.Lang
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entry.ECI = &response.ECI
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entry.Success = &response.Success
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entry.ApprovalCode = &response.ApprovalCode
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entry.Error = &response.ErrorMessage
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entry.State = paymentState
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if _, err := provider.UpdateEntry(entry); err != nil {
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return "", err
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}
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return "/entries/" + entry.Id.String(), nil
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}
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func CalculateFormSignature(shopId string, secret string, cartId string, amount int64) string {
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/**
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Represents a signature created from string formatted from following values in a following order using
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SHA512 algorithm:
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ShopID
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SecretKey
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ShoppingCartID
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SecretKey
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TotalAmount
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SecretKey
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*/
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signature := shopId + secret + cartId + secret + strconv.FormatInt(amount, 10) + secret
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hash := sha512.New()
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hash.Write([]byte(signature))
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return hex.EncodeToString(hash.Sum(nil))
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}
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func CalculateCompletionSignature(shopId string, secret string, wsPayOrderId string, stan string, approvalCode string, amount int64) string {
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/**
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Represents a signature created from string formatted from following values in a following order using
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SHA512 algorithm:
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ShopID
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WsPayOrderId
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SecretKey
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STAN
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SecretKey
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ApprovalCode
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SecretKey
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Amount
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SecretKey
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WsPayOrderId
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*/
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signature := shopId + wsPayOrderId + secret + stan + secret + approvalCode + secret + strconv.FormatInt(amount, 10) + secret + wsPayOrderId
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hash := sha512.New()
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hash.Write([]byte(signature))
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return hex.EncodeToString(hash.Sum(nil))
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}
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func CompareFormReturnSignature(signature string, shopId string, secret string, cartId string, success int, approvalCode string) error {
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/**
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Represents a signature created from string formatted from following values in a following order using
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SHA512 algorithm:
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ShopID
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SecretKey
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ShoppingCartID
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SecretKey
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Success
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SecretKey
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ApprovalCode
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SecretKey
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Merchant should validate this signature to make sure that the request is originating from WSPayForm.
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*/
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calculatedSignature := shopId + secret + cartId + secret + strconv.FormatInt(int64(success), 10) + secret + approvalCode + secret
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hash := sha512.New()
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hash.Write([]byte(calculatedSignature))
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if hex.EncodeToString(hash.Sum(nil)) == signature {
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return nil
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} else {
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return errors.New("signature mismatch")
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}
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}
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func CompareCompletionReturnSignature(signature string, shopId string, secret string, stan string, actionSuccess string, approvalCode string, wsPayOrderId string) error {
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/**
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Represents a signature created from string formatted from following values in a following order using
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SHA512 algorithm:
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ShopID
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SecretKey
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STAN
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ActionSuccess
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SecretKey
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ApprovalCode
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WsPayOrderId
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Merchant should validate this signature to make sure that the request is originating from WSPayForm.
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*/
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calculatedSignature := shopId + secret + stan + actionSuccess + secret + approvalCode + wsPayOrderId
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hash := sha512.New()
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hash.Write([]byte(calculatedSignature))
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if hex.EncodeToString(hash.Sum(nil)) == signature {
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return nil
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} else {
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return errors.New("signature mismatch")
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}
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}
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func CompareStatusCheckReturnSignature(signature string, shopId string, secret string, actionSuccess string, approvalCode string, wsPayOrderId string) error {
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/**
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Represents a signature created from string formatted from following values in a following order using
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SHA512 algorithm:
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ShopID
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SecretKey
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ActionSuccess
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ApprovalCode
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SecretKey
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ShopID
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ApprovalCode
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WsPayOrderId
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*/
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calculatedSignature := shopId + secret + actionSuccess + approvalCode + secret + shopId + approvalCode + wsPayOrderId
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hash := sha512.New()
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hash.Write([]byte(calculatedSignature))
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if hex.EncodeToString(hash.Sum(nil)) == signature {
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return nil
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} else {
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return errors.New("signature mismatch")
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}
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}
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func CalculateStatusCheckSignature(shopId string, secret string, cartId string) string {
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/**
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Represents a signature created from string formatted from following values in a following order using
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SHA512 algorithm:
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ShopID
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SecretKey
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ShoppingCartID
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SecretKey
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ShopID
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ShoppingCartID
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*/
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signature := shopId + secret + cartId + secret + shopId + cartId
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hash := sha512.New()
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hash.Write([]byte(signature))
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return hex.EncodeToString(hash.Sum(nil))
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}
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func readResponse[T any](httpResponse *http.Response, response T) error {
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if httpResponse.StatusCode == http.StatusOK {
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content, err := io.ReadAll(httpResponse.Body)
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if err != nil {
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return err
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}
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return json.Unmarshal(content, response)
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} else {
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return errors.New("received wrong status, expected 200 received " + strconv.FormatInt(int64(httpResponse.StatusCode), 10))
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}
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}
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func createRequest(method string, url string, headers map[string]string, content []byte) (*http.Response, error) {
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request, err := http.NewRequest(method, url, bytes.NewReader(content))
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if err != nil {
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return nil, err
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}
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for key, value := range headers {
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request.Header.Add(key, value)
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}
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return http.DefaultClient.Do(request)
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}
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func toJson[T any](request T) []byte {
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response, err := json.Marshal(request)
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if err != nil {
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panic(err)
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}
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return response
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}
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@@ -0,0 +1,145 @@
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package wspay
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type CreateTransaction struct {
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ShopID string `json:"ShopID"`
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ShoppingCardID string `json:"ShoppingCartID"`
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Version string `json:"Version"`
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TotalAmount string `json:"TotalAmount"`
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ReturnUrl string `json:"ReturnURL"`
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ReturnErrorUrl string `json:"ReturnErrorURL"`
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CancelUrl string `json:"CancelURL"`
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Signature string `json:"Signature"`
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}
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type TransactionResponse struct {
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TransactionId *string `json:"TransactionId"`
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PaymentFormUrl *string `json:"PaymentFormUrl"`
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}
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type FormReturn struct {
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CustomerFirstName string `form:"CustomerFirstname"`
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CustomerSurname string `form:"CustomerSurname"`
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CustomerAddress string `form:"CustomerAddress"`
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CustomerCity string `form:"CustomerCity"`
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CustomerZIP string `form:"CustomerZIP"`
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CustomerCountry string `form:"CustomerCountry"`
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CustomerPhone string `form:"CustomerPhone"`
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CustomerEmail string `form:"CustomerEmail"`
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ShoppingCartID string `form:"ShoppingCartID"`
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Lang string `form:"Lang"`
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DateTime string `form:"DateTime"` //yyyymmddHHMMss
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Amount string `form:"Amount"` // eg. 123,43
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ECI string `form:"ECI"`
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STAN string `form:"STAN"`
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Partner string `form:"Partner"`
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WsPayOrderId string `form:"WsPayOrderId"`
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PaymentType string `form:"PaymentType"`
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CreditCardNumber string `form:"CreditCardNumber"` // masked number
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PaymentPlan string `form:"PaymentPlan"`
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ShopPostedPaymentPlan string `form:"ShopPostedPaymentPlan"`
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ShopPostedLang string `form:"ShopPostedLang"`
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ShopPostedCreditCardName string `form:"ShopPostedCreditCardName"`
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Success int `form:"Success"`
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ApprovalCode string `form:"ApprovalCode"`
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ErrorMessage string `form:"ErrorMessage"`
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ShopPostedPaymentMethod string `form:"ShopPostedPaymentMethod"`
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Signature string `form:"Signature"`
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}
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type FormError struct {
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CustomerFirstName string
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CustomerSurname string
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CustomerAddress string
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CustomerCity string
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CustomerZIP string
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CustomerCountry string
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CustomerPhone string
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CustomerEmail string
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ShoppingCartID string
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Lang string
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DateTime string //yyyymmddHHMMss
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Amount string // eg. 123,43
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ECI string
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PaymentType string
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PaymentPlan string
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ShopPostedPaymentPlan string
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ShopPostedLang string
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ShopPostedCreditCardName string
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Success int
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ApprovalCode string
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ErrorMessage string
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ShopPostedPaymentMethod string
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ErrorCodes string
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Signature string
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}
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type FormCancel struct {
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ResponseCode int
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ShoppingCartID string
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ApprovalCode string
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Success int
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Signature string
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}
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type CompletionRequest struct {
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Version string
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WsPayOrderId string
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ShopID string
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ApprovalCode string
|
||||
STAN string
|
||||
Amount string
|
||||
Signature string
|
||||
}
|
||||
|
||||
type CompletionResponse struct {
|
||||
WsPayOrderId string
|
||||
ShopID string
|
||||
ApprovalCode string
|
||||
STAN string
|
||||
ErrorMessage string
|
||||
ActionSuccess string
|
||||
Signature string
|
||||
}
|
||||
|
||||
type StatusCheckRequest struct {
|
||||
Version string
|
||||
ShopID string
|
||||
ShoppingCartId string
|
||||
Signature string
|
||||
}
|
||||
|
||||
type StatusCheckResponse struct {
|
||||
WsPayOrderId string
|
||||
Signature string
|
||||
STAN string
|
||||
ApprovalCode string
|
||||
ShopID string
|
||||
ShoppingCartID string
|
||||
Amount float64
|
||||
CurrencyCode int
|
||||
ActionSuccess string
|
||||
Success string // deprecated
|
||||
Authorized string
|
||||
Completed string
|
||||
Voided string
|
||||
Refunded string
|
||||
PaymentPlan string
|
||||
Partner string
|
||||
OnSite string
|
||||
CreditCardName string
|
||||
CreditCardNumber string
|
||||
ECI string
|
||||
CustomerFirstName string
|
||||
CustomerLastName string
|
||||
CustomerCity string
|
||||
CustomerZIP string
|
||||
CustomerCountry string
|
||||
CustomerPhone string
|
||||
CustomerEmail string
|
||||
TransactionDateTime string // yyyymmddHHMMss
|
||||
IsLessThan30DaysFromTransaction bool
|
||||
CanBeCompleted bool
|
||||
CanBeVoided bool
|
||||
CanBeRefunded bool
|
||||
ExpirationDate string
|
||||
}
|
||||
Reference in new issue
Block a user