1 files changed, 12 insertions, 0 deletions
diff --git a/packages/taler-wallet-core/src/crypto/workers/cryptoImplementation.ts b/packages/taler-wallet-core/src/crypto/workers/cryptoImplementation.ts
index 1f44d6277..87fad8634 100644
--- a/packages/taler-wallet-core/src/crypto/workers/cryptoImplementation.ts
+++ b/packages/taler-wallet-core/src/crypto/workers/cryptoImplementation.ts
@@ -72,11 +72,13 @@ import {
   DerivedTipPlanchet,
   DeriveRefreshSessionRequest,
   DeriveTipRequest,
+  SignTrackTransactionRequest,
 } from "../../types/cryptoTypes";
 
 const logger = new Logger("cryptoImplementation.ts");
 
 enum SignaturePurpose {
+  MERCHANT_TRACK_TRANSACTION = 1103,
   WALLET_RESERVE_WITHDRAW = 1200,
   WALLET_COIN_DEPOSIT = 1201,
   MASTER_DENOMINATION_KEY_VALIDITY = 1025,
@@ -211,6 +213,16 @@ export class CryptoImplementation {
     return tipPlanchet;
   }
 
+  signTrackTransaction(req: SignTrackTransactionRequest): string {
+    const p = buildSigPS(SignaturePurpose.MERCHANT_TRACK_TRANSACTION)
+      .put(decodeCrock(req.contractTermsHash))
+      .put(decodeCrock(req.wireHash))
+      .put(decodeCrock(req.merchantPub))
+      .put(decodeCrock(req.coinPub))
+      .build();
+      return encodeCrock(eddsaSign(p, decodeCrock(req.merchantPriv)));
+  }
+
   /**
    * Create and sign a message to recoup a coin.
    */