From 2c14d338704f4574055c4b5c51d8a79dd2e22345 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Tue, 21 Dec 2021 16:16:10 +0100
Subject: deduplicate melt signing logic, remove coin_pub from data being
 signed over

---
 src/include/taler_crypto_lib.h | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

(limited to 'src/include/taler_crypto_lib.h')

diff --git a/src/include/taler_crypto_lib.h b/src/include/taler_crypto_lib.h
index 5895d121..89e8697d 100644
--- a/src/include/taler_crypto_lib.h
+++ b/src/include/taler_crypto_lib.h
@@ -1723,6 +1723,47 @@ TALER_wallet_deposit_verify (
   const struct TALER_CoinSpendSignatureP *coin_sig);
 
 
+/**
+ * Sign a melt request.
+ *
+ * @param amount the amount to be melted (with fee)
+ * @param melt_fee the melt fee we expect to pay
+ * @param rc refresh session we are committed to
+ * @param h_denom_pub hash of the coin denomination's public key
+ * @param coin_priv coin’s private key
+ * @param[out] coin_sig set to the signature made with purpose #TALER_SIGNATURE_WALLET_COIN_MELT
+ */
+void
+TALER_wallet_melt_sign (
+  const struct TALER_Amount *amount_with_fee,
+  const struct TALER_Amount *melt_fee,
+  const struct TALER_RefreshCommitmentP *rc,
+  const struct TALER_DenominationHash *h_denom_pub,
+  const struct TALER_CoinSpendPrivateKeyP *coin_priv,
+  struct TALER_CoinSpendSignatureP *coin_sig);
+
+
+/**
+ * Verify a melt request.
+ *
+ * @param amount the amount to be melted (with fee)
+ * @param melt_fee the melt fee we expect to pay
+ * @param rc refresh session we are committed to
+ * @param h_denom_pub hash of the coin denomination's public key
+ * @param coin_pub coin’s public key
+ * @param coin_sig the signature made with purpose #TALER_SIGNATURE_WALLET_COIN_MELT
+ * @return #GNUNET_OK if the signature is valid
+ */
+enum GNUNET_GenericReturnValue
+TALER_wallet_melt_verify (
+  const struct TALER_Amount *amount_with_fee,
+  const struct TALER_Amount *melt_fee,
+  const struct TALER_RefreshCommitmentP *rc,
+  const struct TALER_DenominationHash *h_denom_pub,
+  const struct TALER_CoinSpendPublicKeyP *coin_pub,
+  const struct TALER_CoinSpendSignatureP *coin_sig);
+
+
 /**
  * Sign link data.
  *
-- 
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