optimize /deposit logic to minimize serialization failures (presumably)

1 files changed, 26 insertions, 0 deletions

diff --git a/src/exchange/taler-exchange-httpd_db.h b/src/exchange/taler-exchange-httpd_db.h
index 83302235..60885dbd 100644
--- a/src/exchange/taler-exchange-httpd_db.h
+++ b/src/exchange/taler-exchange-httpd_db.h
@@ -42,6 +42,32 @@ TEH_make_coin_known (const struct TALER_CoinPublicInfo *coin,
 
 
 /**
+ * Check that a coin has an adequate balance so that we can
+ * commit the current transaction. If the balance is
+ * insufficient for all transactions associated with the
+ * coin, return a hard error.
+ *
+ * @param connection HTTP connection to report hard errors on
+ * @param coin_pub coin to analyze
+ * @param coin_value total value of the original coin (by denomination)
+ * @param op_cost cost of the current operation (for error reporting)
+ * @param check_recoup should we include recoup transactions in the check
+ * @param zombie_required additional requirement that the coin must
+ *          be a zombie coin, or also hard failure
+ * @param[out] mhd_ret set to response status code, on hard error only
+ * @return transaction status
+ */
+enum GNUNET_DB_QueryStatus
+TEH_check_coin_balance (struct MHD_Connection *connection,
+                        const struct TALER_CoinSpendPublicKeyP *coin_pub,
+                        const struct TALER_Amount *coin_value,
+                        const struct TALER_Amount *op_cost,
+                        bool check_recoup,
+                        bool zombie_required,
+                        MHD_RESULT *mhd_ret);
+
+
+/**
  * Function implementing a database transaction.  Runs 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