1 files changed, 6 insertions, 0 deletions
diff --git a/packages/taler-util/src/http-client/merchant.ts b/packages/taler-util/src/http-client/merchant.ts
index 5aace2d78..a6dc4661f 100644
--- a/packages/taler-util/src/http-client/merchant.ts
+++ b/packages/taler-util/src/http-client/merchant.ts
@@ -1,6 +1,7 @@
 import { HttpRequestLibrary } from "../http-common.js";
 import { HttpStatusCode } from "../http-status-codes.js";
 import { createPlatformHttpLib } from "../http.js";
+import { LibtoolVersion } from "../libtool-version.js";
 import { FailCasesByMethod, ResultByMethod, opSuccess, opUnknownFailure } from "../operation.js";
 import { codecForMerchantConfig } from "./types.js";
 
@@ -11,6 +12,7 @@ export type TalerMerchantErrorsByMethod<prop extends keyof TalerMerchantHttpClie
  */
 export class TalerMerchantHttpClient {
   httpLib: HttpRequestLibrary;
+  public readonly PROTOCOL_VERSION = "5:0:1";
 
   constructor(
     readonly baseUrl: string,
@@ -19,6 +21,10 @@ export class TalerMerchantHttpClient {
     this.httpLib = httpClient ?? createPlatformHttpLib();
   }
 
+  isCompatible(version: string): boolean {
+    const compare = LibtoolVersion.compare(this.PROTOCOL_VERSION, version)
+    return compare?.compatible ?? false
+  }
   /**
    * https://docs.taler.net/core/api-merchant.html#get--config
    *