exchange

commit b2d7bb32aa25f01b73b213f433147328e1f2c8a8
parent 70994304ed12d6a595c2a79b251f6f7fae364065
Author: Christian Grothoff <christian@grothoff.org>
Date:   Thu,  2 Jan 2025 12:52:30 +0100

-add convenience function TALER_EXCHANGE_keys_test_account_allowed

Diffstat:
M
src/include/taler_exchange_service.h
 | 
22
++++++++++++++++++++++
M
src/lib/Makefile.am
 | 
2
+-
M
src/lib/exchange_api_common.c
 | 
28
++++++++++++++++++++++++++++

3 files changed, 51 insertions(+), 1 deletion(-)
diff --git a/src/include/taler_exchange_service.h b/src/include/taler_exchange_service.h
@@ -1041,6 +1041,28 @@ TALER_EXCHANGE_test_account_allowed (
 
 
 /**
+ * Check if a wire transfer is allowed between the exchange
+ * and an account identified by @a payto_uri.
+ *
+ * @param keys exchange /keys response to check against
+ * @param check_credit true for credit (sending money
+ *   to the exchange), false for debit (receiving money
+ *   from the exchange)
+ * @param payto_uri other bank account (merchant, customer)
+ * @return
+ *   #GNUNET_YES if the exchange would allow this
+ *   #GNUNET_NO if this is not allowed
+ *   #GNUNET_SYSERR if data in @a account is malformed
+ *       or we experienced internal errors
+ */
+enum GNUNET_GenericReturnValue
+TALER_EXCHANGE_keys_test_account_allowed (
+  const struct TALER_EXCHANGE_Keys *keys,
+  bool check_credit,
+  const struct TALER_NormalizedPayto payto_uri);
+
+
+/**
  * Check the hard limits in @a keys for the given
  * @a event and lower @a limit to the lowest applicable
  * limit independent (!) of the timeframe.  Useful
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am
@@ -18,7 +18,7 @@ lib_LTLIBRARIES = \
   libtalerexchange.la
 
 libtalerexchange_la_LDFLAGS = \
-  -version-info 14:0:0 \
+  -version-info 15:0:1 \
   -no-undefined
 libtalerexchange_la_SOURCES = \
   exchange_api_add_aml_decision.c \
diff --git a/src/lib/exchange_api_common.c b/src/lib/exchange_api_common.c
@@ -651,4 +651,32 @@ TALER_EXCHANGE_free_accounts (
 }
 
 
+enum GNUNET_GenericReturnValue
+TALER_EXCHANGE_keys_test_account_allowed (
+  const struct TALER_EXCHANGE_Keys *keys,
+  bool check_credit,
+  const struct TALER_NormalizedPayto payto_uri)
+{
+  /* For all accounts of the exchange */
+  for (unsigned int i = 0; i<keys->accounts_len; i++)
+  {
+    const struct TALER_EXCHANGE_WireAccount *account
+      = &keys->accounts[i];
+
+    /* KYC auth transfers are never supported with conversion */
+    if (NULL != account->conversion_url)
+      continue;
+    /* filter by source account by credit_restrictions */
+    if (GNUNET_YES !=
+        TALER_EXCHANGE_test_account_allowed (account,
+                                             check_credit,
+                                             payto_uri))
+      continue;
+    /* exchange account is allowed, add it */
+    return true;
+  }
+  return false;
+}
+
+
 /* end of exchange_api_common.c */