first commit

internal/webhook/signer.go

@@ -0,0 +1,16 @@
+package webhook
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
+)
+
+func Sign(secret string, body []byte) string {
+	if secret == "" {
+		return ""
+	}
+	mac := hmac.New(sha256.New, []byte(secret))
+	mac.Write(body)
+	return hex.EncodeToString(mac.Sum(nil))
+}