init: ops-assistant codebase

internal/module/cpa/crypto.go

@@ -0,0 +1,16 @@
+package cpa
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"strings"
+)
+
+func hashConfirmToken(token string) string {
+	t := strings.TrimSpace(token)
+	if t == "" {
+		return ""
+	}
+	sum := sha256.Sum256([]byte(t))
+	return hex.EncodeToString(sum[:])
+}