2 files changed, 9 insertions, 4 deletions
diff --git a/packages/taler-wallet-core/src/crypto/cryptoTypes.ts b/packages/taler-wallet-core/src/crypto/cryptoTypes.ts
index 94abb8f7c..00a7fba81 100644
--- a/packages/taler-wallet-core/src/crypto/cryptoTypes.ts
+++ b/packages/taler-wallet-core/src/crypto/cryptoTypes.ts
@@ -110,7 +110,7 @@ export interface DeriveTipRequest {
  */
 export interface DerivedTipPlanchet {
   blindingKey: string;
-  coinEv: string;
+  coinEv: CoinEnvelope;
   coinEvHash: string;
   coinPriv: string;
   coinPub: string;
diff --git a/packages/taler-wallet-core/src/crypto/workers/cryptoImplementation.ts b/packages/taler-wallet-core/src/crypto/workers/cryptoImplementation.ts
index f9cc63ecc..d96e83058 100644
--- a/packages/taler-wallet-core/src/crypto/workers/cryptoImplementation.ts
+++ b/packages/taler-wallet-core/src/crypto/workers/cryptoImplementation.ts
@@ -229,11 +229,16 @@ export class CryptoImplementation {
     const denomPub = decodeCrock(req.denomPub.rsa_public_key);
     const coinPubHash = hash(fc.coinPub);
     const ev = rsaBlind(coinPubHash, fc.bks, denomPub);
-
+    const coinEv = {
+      cipher: DenomKeyType.Rsa,
+      rsa_blinded_planchet: encodeCrock(ev),
+    };
     const tipPlanchet: DerivedTipPlanchet = {
       blindingKey: encodeCrock(fc.bks),
-      coinEv: encodeCrock(ev),
-      coinEvHash: encodeCrock(hash(ev)),
+      coinEv,
+      coinEvHash: encodeCrock(
+        hashCoinEv(coinEv, encodeCrock(hashDenomPub(req.denomPub))),
+      ),
       coinPriv: encodeCrock(fc.coinPriv),
       coinPub: encodeCrock(fc.coinPub),
     };