1 files changed, 39 insertions, 0 deletions
diff --git a/src/exchange/taler-exchange-httpd_db.h b/src/exchange/taler-exchange-httpd_db.h
index 2a42bcd85..091421bb4 100644
--- a/src/exchange/taler-exchange-httpd_db.h
+++ b/src/exchange/taler-exchange-httpd_db.h
@@ -24,6 +24,45 @@
 #include <microhttpd.h>
 #include "taler_exchangedb_plugin.h"
 
+
+/**
+ * Type of closure for #TEH_DB_know_coin_transaction.
+ */
+struct TEH_DB_KnowCoinContext
+{
+  /**
+   * The coin to make sure it is known.
+   */
+  const struct TALER_CoinPublicInfo *coin;
+
+  /**
+   * MHD connection to queue errors with.
+   */
+  struct MHD_Connection *connection;
+};
+
+
+/**
+ * Execute database transaction to ensure coin is known. Run the transaction
+ * logic; IF it returns a non-error code, the transaction logic MUST
+ * NOT queue a MHD response.  IF it returns an hard error, the
+ * transaction logic MUST queue a MHD response and set @a mhd_ret.  IF
+ * it returns the soft error code, the function MAY be called again to
+ * retry and MUST not queue a MHD response.
+ *
+ * @param cls a `struct DepositContext`
+ * @param connection MHD request context
+ * @param session database session and transaction to use
+ * @param[out] mhd_ret set to MHD status on error
+ * @return transaction status
+ */
+enum GNUNET_DB_QueryStatus
+TEH_DB_know_coin_transaction (void *cls,
+                              struct MHD_Connection *connection,
+                              struct TALER_EXCHANGEDB_Session *session,
+                              int *mhd_ret);
+
+
 /**
  * Function implementing a database transaction.  Runs the transaction
  * logic; IF it returns a non-error code, the transaction logic MUST