From b38134ea4a2a90fdce6d9f661ed58df47a17bcfe Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Wed, 29 Mar 2017 14:43:54 +0200
Subject: implement /payback parsing and signature verification

---
 src/exchange/taler-exchange-httpd_db.h | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

(limited to 'src/exchange/taler-exchange-httpd_db.h')

diff --git a/src/exchange/taler-exchange-httpd_db.h b/src/exchange/taler-exchange-httpd_db.h
index 47afaadcb..67c8665f2 100644
--- a/src/exchange/taler-exchange-httpd_db.h
+++ b/src/exchange/taler-exchange-httpd_db.h
@@ -214,7 +214,7 @@ TEH_DB_execute_admin_add_incoming (struct MHD_Connection *connection,
  */
 int
 TEH_DB_execute_track_transfer (struct MHD_Connection *connection,
-                              const struct TALER_WireTransferIdentifierRawP *wtid);
+                               const struct TALER_WireTransferIdentifierRawP *wtid);
 
 
 /**
@@ -230,10 +230,29 @@ TEH_DB_execute_track_transfer (struct MHD_Connection *connection,
  */
 int
 TEH_DB_execute_track_transaction (struct MHD_Connection *connection,
-                             const struct GNUNET_HashCode *h_proposal_data,
-			     const struct GNUNET_HashCode *h_wire,
-			     const struct TALER_CoinSpendPublicKeyP *coin_pub,
-			     const struct TALER_MerchantPublicKeyP *merchant_pub);
+                                  const struct GNUNET_HashCode *h_proposal_data,
+                                  const struct GNUNET_HashCode *h_wire,
+                                  const struct TALER_CoinSpendPublicKeyP *coin_pub,
+                                  const struct TALER_MerchantPublicKeyP *merchant_pub);
+
+
+/**
+ * Execute a "/payback".  The validity of the coin and signature have
+ * already been checked.  The database must now check that the coin is
+ * not (double) spent, and execute the transaction (record details,
+ * generate success or failure response).
+ *
+ * @param connection the MHD connection to handle
+ * @param coin information about the coin
+ * @param coin_bks blinding data of the coin (to be checked)
+ * @param coin_sig signature of the coin
+ * @return MHD result code
+ */
+int
+TEH_DB_execute_payback (struct MHD_Connection *connection,
+                        const struct TALER_CoinPublicInfo *coin,
+                        const struct TALER_DenominationBlindingKeyP *coin_bks,
+                        const struct TALER_CoinSpendSignatureP *coin_sig);
 
 
 #endif
-- 
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