diff --git a/lib/firefly.ts b/lib/firefly.ts
index 5bbebff..ccf42fa 100644
--- a/lib/firefly.ts
+++ b/lib/firefly.ts
@@ -510,6 +510,10 @@ export default class FireFly extends HttpBase {
     return this.getMany<FireFlyContractListenerResponse[]>('/contracts/listeners', filter, options);
   }
 
+  async deleteContractListener(id: string, options?: FireFlyDeleteOptions) {
+    await this.deleteOne(`/contracts/listeners/${id}`, options);
+  }
+
   getContractAPIListeners(
     apiName: string,
     eventPath: string,
diff --git a/lib/http.ts b/lib/http.ts
index b055de5..9f6d75b 100644
--- a/lib/http.ts
+++ b/lib/http.ts
@@ -8,6 +8,7 @@ import {
   FireFlyReplaceOptions,
   FireFlyUpdateOptions,
   FireFlyDeleteOptions,
+  FireFlyIdempotencyError,
 } from './interfaces';
 
 function isSuccess(status: number) {
@@ -74,8 +75,12 @@ export default class HttpBase {
   protected async wrapError<T>(response: Promise<AxiosResponse<T>>) {
     return response.catch((err) => {
       if (axios.isAxiosError(err)) {
-        const errorMessage = err.response?.data?.error;
-        const ffError = new FireFlyError(errorMessage ?? err.message, err, err.request.path);
+        const errorMessage = err.response?.data?.error ?? err.message;
+        const errorClass =
+          errorMessage?.includes('FF10430') || errorMessage?.includes('FF10431')
+            ? FireFlyIdempotencyError
+            : FireFlyError;
+        const ffError = new errorClass(errorMessage, err, err.request.path);
         if (this.errorHandler !== undefined) {
           this.errorHandler(ffError);
         }
diff --git a/lib/interfaces.ts b/lib/interfaces.ts
index 9e7ad33..acb5edc 100644
--- a/lib/interfaces.ts
+++ b/lib/interfaces.ts
@@ -21,6 +21,8 @@ export class FireFlyError extends Error {
   }
 }
 
+export class FireFlyIdempotencyError extends FireFlyError {}
+
 interface FireFlyBaseHttpOptions {
   requestConfig?: AxiosRequestConfig;
 }
diff --git a/package-lock.json b/package-lock.json
index 8d6b8a4..ac52acb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@hyperledger/firefly-sdk",
-  "version": "1.2.6",
+  "version": "1.2.7",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@hyperledger/firefly-sdk",
-      "version": "1.2.6",
+      "version": "1.2.7",
       "license": "Apache-2.0",
       "dependencies": {
         "axios": "^0.26.1",
diff --git a/package.json b/package.json
index db46f53..40c0f44 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperledger/firefly-sdk",
-  "version": "1.2.6",
+  "version": "1.2.7",
   "description": "Client SDK for Hyperledger FireFly",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",