popertotsandSisyphus
ed9cb1489c
errcheck: add proper error handling with slog.Error for tx.Rollback, key generation, and s3/dav operations. Add nolint comments for intentionally discarded DB scan errors and HTTP write errors. unused: remove dead code (svcRow type, processImage, nonDepositPaymentType, generateSecureCode, colorBold, nGreen, nRed) gosimple S1021: merge var declaration with assignment in manage.go ineffassign: remove dead assignments in settings.go, till.go, images.go Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
95 lines
2.9 KiB
Go
95 lines
2.9 KiB
Go
package webhooks
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import (
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"crypto/hmac"
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"crypto/sha256"
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"encoding/base64"
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"encoding/json"
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"io"
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"log"
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"net/http"
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"os"
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)
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type SquareWebhookEvent struct {
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Type string `json:"type"`
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EventID string `json:"event_id"`
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CreatedAt string `json:"created_at"`
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Data json.RawMessage `json:"data"`
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LocationID string `json:"location_id"`
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}
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func HandleSquareWebhook(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, 512*1024)
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body, err := io.ReadAll(r.Body)
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if err != nil {
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log.Printf("Failed to read webhook body: %v", err)
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http.Error(w, "request body too large or unreadable", http.StatusRequestEntityTooLarge)
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return
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}
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defer r.Body.Close()
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// Verification logic per Square spec (HMAC-SHA256, base64, notificationURL + body).
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// Production setup: set SQUARE_WEBHOOK_SIGNATURE_KEY and SQUARE_WEBHOOK_NOTIFICATION_URL
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// in env vars (see Square Developer Console → Webhooks → Subscription).
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// Reference: https://developer.squareup.com/docs/webhooks/step3validate
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signingKey := os.Getenv("SQUARE_WEBHOOK_SIGNATURE_KEY")
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notificationURL := os.Getenv("SQUARE_WEBHOOK_NOTIFICATION_URL")
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if notificationURL == "" {
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notificationURL = "http://localhost:8080/webhooks/square"
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}
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if signingKey != "" {
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signature := r.Header.Get("x-square-hmacsha256-signature")
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if signature == "" {
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log.Printf("Missing Square webhook signature header")
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http.Error(w, "Invalid signature", http.StatusForbidden)
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return
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}
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if !verifySquareSignature(body, signature, signingKey, notificationURL) {
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log.Printf("Invalid Square webhook signature")
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http.Error(w, "Invalid signature", http.StatusForbidden)
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return
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}
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}
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var event SquareWebhookEvent
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if err := json.Unmarshal(body, &event); err != nil {
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log.Printf("Failed to parse webhook event: %v", err)
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http.Error(w, "Invalid event", http.StatusBadRequest)
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return
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}
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log.Printf("[SQUARE-WEBHOOK] Received event: %s", event.Type)
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switch event.Type {
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case "payment.updated":
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handlePaymentUpdated(event.Data)
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case "refund.updated":
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handleRefundUpdated(event.Data)
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case "dispute.created":
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log.Printf("[SQUARE-WEBHOOK] Dispute created: %s", event.EventID)
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default:
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log.Printf("[SQUARE-WEBHOOK] Unknown event type: %s", event.Type)
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}
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w.WriteHeader(http.StatusOK)
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_, _ = w.Write([]byte("ok"))
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}
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func verifySquareSignature(body []byte, signature, signingKey, notificationURL string) bool {
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mac := hmac.New(sha256.New, []byte(signingKey))
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mac.Write([]byte(notificationURL))
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mac.Write(body)
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expected := base64.StdEncoding.EncodeToString(mac.Sum(nil))
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return hmac.Equal([]byte(signature), []byte(expected))
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}
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func handlePaymentUpdated(data json.RawMessage) {
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log.Printf("[SQUARE-WEBHOOK] payment.updated: %s", string(data))
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}
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func handleRefundUpdated(data json.RawMessage) {
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log.Printf("[SQUARE-WEBHOOK] refund.updated: %s", string(data))
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}
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