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diff --git a/src/mint/taler-mint-httpd_db.h b/src/mint/taler-mint-httpd_db.h
new file mode 100644
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+++ b/src/mint/taler-mint-httpd_db.h
@@ -0,0 +1,79 @@
+/*
+  This file is part of TALER
+  (C) 2014 Christian Grothoff (and other contributing authors)
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation; either version 3, or (at your option) any later version.
+
+  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file mint/taler-mint_httpd_db.h
+ * @brief Mint-specific database access
+ * @author Chrisitan Grothoff
+ */
+#ifndef TALER_MINT_HTTPD_DB_H
+#define TALER_MINT_HTTPD_DB_H
+
+#include <libpq-fe.h>
+#include <microhttpd.h>
+#include <gnunet/gnunet_util_lib.h>
+#include "taler_util.h"
+#include "taler_rsa.h"
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Specification for a /deposit operation.
+ */
+struct Deposit
+{
+  /* FIXME: should be TALER_CoinPublicInfo */
+  struct GNUNET_CRYPTO_EddsaPublicKey coin_pub;
+  struct TALER_RSA_PublicKeyBinaryEncoded denom_pub;
+  struct TALER_RSA_Signature coin_sig;
+
+  struct TALER_RSA_Signature ubsig;
+
+  /**
+   * Type of the deposit (also purpose of the signature).  Either
+   * #TALER_SIGNATURE_DEPOSIT or #TALER_SIGNATURE_INCREMENTAL_DEPOSIT.
+   */
+  struct TALER_RSA_SignaturePurpose purpose;
+  uint64_t transaction_id;
+  struct TALER_AmountNBO amount;
+  struct GNUNET_CRYPTO_EddsaPublicKey merchant_pub;
+  struct GNUNET_HashCode h_contract;
+  struct GNUNET_HashCode h_wire;
+
+  /* TODO: uint16_t wire_size */
+  char wire[];                  /* string encoded wire JSON object */
+
+};
+
+GNUNET_NETWORK_STRUCT_END
+
+
+/**
+ * Execute a deposit.  The validity of the coin and signature
+ * have already been checked.  The database must now check that
+ * the coin is not (double or over) spent, and execute the
+ * transaction (record details, generate success or failure response).
+ *
+ * @param connection the MHD connection to handle
+ * @param deposit information about the deposit
+ * @return MHD result code
+ */
+int
+TALER_MINT_db_execute_deposit (struct MHD_Connection *connection,
+                               const struct Deposit *deposit);
+
+
+#endif /* _NEURO_MINT_DB_H */