From bd2372f20ef7259d87c44e92de32c66b26e6632f Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sat, 11 Apr 2015 16:38:09 +0200
Subject: implementing #3740

---
 contrib/mint-template/config/mint-common.conf | 14 ++++++++++----
 src/mint/taler-mint-httpd.c                   | 24 +++++++++++++++++++++++-
 src/mint/taler-mint-httpd.h                   |  5 ++---
 src/mint/taler-mint-httpd_parsing.c           |  6 +++---
 src/mint/taler-mint-httpd_refresh.c           |  4 ++--
 5 files changed, 40 insertions(+), 13 deletions(-)

diff --git a/contrib/mint-template/config/mint-common.conf b/contrib/mint-template/config/mint-common.conf
index 4e13a3ef3..00cbc82fa 100644
--- a/contrib/mint-template/config/mint-common.conf
+++ b/contrib/mint-template/config/mint-common.conf
@@ -1,6 +1,12 @@
 [mint]
-db = postgres:///taler
-port = 4241
-TMH_master_public_key = ...
-refresh_security_parameter = 3
+# Currency supported by the mint (can only be one)
+CURRENCY = EUR
 
+# How to access our database
+DB = postgres:///taler
+
+# HTTP port the mint listens to
+PORT = 4241
+
+# Master public key used to sign the mint's various keys
+TMH_MASTER_PUBLIC_KEY = ...
diff --git a/src/mint/taler-mint-httpd.c b/src/mint/taler-mint-httpd.c
index 1315ba204..dd1e234cb 100644
--- a/src/mint/taler-mint-httpd.c
+++ b/src/mint/taler-mint-httpd.c
@@ -36,6 +36,10 @@
 #include "taler-mint-httpd_keystate.h"
 #include "taler_mintdb_plugin.h"
 
+/**
+ * Which currency is used by this mint?
+ */
+char *TMH_mint_currency_string;
 
 /**
  * Base directory of the mint (global)
@@ -248,9 +252,27 @@ mint_serve_process_config (const char *mint_directory)
   if (NULL == cfg)
   {
     fprintf (stderr,
-             "can't load mint configuration\n");
+             "Failed to load mint configuration\n");
     return 1;
   }
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_get_value_string (cfg,
+                                             "mint",
+                                             "currency",
+                                             &TMH_mint_currency_string))
+  {
+    fprintf (stderr,
+             "No currency given in mint configuration.");
+    return GNUNET_NO;
+  }
+  if (strlen (TMH_mint_currency_string) >= TALER_CURRENCY_LEN)
+  {
+    fprintf (stderr,
+             "Currency `%s' longer than the allowed limit of %u characters.",
+             TMH_mint_currency_string,
+             (unsigned int) TALER_CURRENCY_LEN);
+    return GNUNET_NO;
+  }
   if (GNUNET_OK !=
       GNUNET_CONFIGURATION_get_value_string (cfg,
                                              "mint",
diff --git a/src/mint/taler-mint-httpd.h b/src/mint/taler-mint-httpd.h
index 5a65ba438..c674a9daa 100644
--- a/src/mint/taler-mint-httpd.h
+++ b/src/mint/taler-mint-httpd.h
@@ -28,10 +28,9 @@
 #include <microhttpd.h>
 
 /**
- * For now, we just do EUR.  Should become configurable in the future! (#3740)
+ * Which currency is used by this mint?
  */
-#define TMH_MINT_CURRENCY "EUR"
-
+extern char *TMH_mint_currency_string;
 
 /**
  * The mint's configuration.
diff --git a/src/mint/taler-mint-httpd_parsing.c b/src/mint/taler-mint-httpd_parsing.c
index c492eccef..d079da5cc 100644
--- a/src/mint/taler-mint-httpd_parsing.c
+++ b/src/mint/taler-mint-httpd_parsing.c
@@ -1025,7 +1025,7 @@ TMH_PARSE_amount_json (struct MHD_Connection *connection,
     return GNUNET_NO;
   }
   if (0 != strcmp (currency,
-                   TMH_MINT_CURRENCY))
+                   TMH_mint_currency_string))
   {
     TALER_LOG_WARNING ("Currency specified not supported by this mint\n");
     if (MHD_YES !=
@@ -1039,8 +1039,8 @@ TMH_PARSE_amount_json (struct MHD_Connection *connection,
   }
   amount->value = (uint64_t) value;
   amount->fraction = (uint32_t) fraction;
-  GNUNET_assert (strlen (TMH_MINT_CURRENCY) < TALER_CURRENCY_LEN);
-  strcpy (amount->currency, TMH_MINT_CURRENCY);
+  GNUNET_assert (strlen (TMH_mint_currency_string) < TALER_CURRENCY_LEN);
+  strcpy (amount->currency, TMH_mint_currency_string);
   TALER_amount_normalize (amount);
   return GNUNET_OK;
 }
diff --git a/src/mint/taler-mint-httpd_refresh.c b/src/mint/taler-mint-httpd_refresh.c
index ffe65911f..805d4f9c5 100644
--- a/src/mint/taler-mint-httpd_refresh.c
+++ b/src/mint/taler-mint-httpd_refresh.c
@@ -75,7 +75,7 @@ handle_refresh_melt_binary (struct MHD_Connection *connection,
   struct TALER_Amount total_melt;
 
   GNUNET_assert (GNUNET_OK ==
-                 TALER_amount_get_zero (TMH_MINT_CURRENCY,
+                 TALER_amount_get_zero (TMH_mint_currency_string,
                                         &total_cost));
   key_state = TMH_KS_acquire ();
   for (i=0;i<num_new_denoms;i++)
@@ -102,7 +102,7 @@ handle_refresh_melt_binary (struct MHD_Connection *connection,
   }
 
   GNUNET_assert (GNUNET_OK ==
-                 TALER_amount_get_zero (TMH_MINT_CURRENCY,
+                 TALER_amount_get_zero (TMH_mint_currency_string,
                                         &total_melt));
   for (i=0;i<coin_count;i++)
   {
-- 
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