1 files changed, 5 insertions, 1 deletions
diff --git a/src/wxBackend.ts b/src/wxBackend.ts
index 1aa10ce4c..984cad21a 100644
--- a/src/wxBackend.ts
+++ b/src/wxBackend.ts
@@ -254,10 +254,14 @@ function makeHandlers(db: IDBDatabase,
     },
     ["payment-succeeded"]: function (detail, sender) {
       let contractHash = detail.contractHash;
+      let merchantSig = detail.merchantSig;
       if (!contractHash) {
         return Promise.reject(Error("contractHash missing"));
       }
-      return wallet.paymentSucceeded(contractHash);
+      if (!merchantSig) {
+        return Promise.reject(Error("merchantSig missing"));
+      }
+      return wallet.paymentSucceeded(contractHash, merchantSig);
     },
   };
 }