From dee45bf02284716d5dea18e94193d74e64f7e5bf Mon Sep 17 00:00:00 2001
From: Christian Grothoff <grothoff@gnunet.org>
Date: Sun, 20 Mar 2022 09:44:42 +0100
Subject: return new global fees from /keys

---
 src/include/taler_exchange_service.h  | 59 +++++++++++++++++++++++++++++++++++
 src/include/taler_exchangedb_plugin.h |  2 +-
 src/include/taler_json_lib.h          | 24 ++++++++++++++
 3 files changed, 84 insertions(+), 1 deletion(-)

(limited to 'src/include')

diff --git a/src/include/taler_exchange_service.h b/src/include/taler_exchange_service.h
index 48272a6b..56940669 100644
--- a/src/include/taler_exchange_service.h
+++ b/src/include/taler_exchange_service.h
@@ -203,6 +203,55 @@ struct TALER_EXCHANGE_AuditorInformation
 };
 
 
+/**
+ * Global fees and options of an exchange for a given time period.
+ */
+struct TALER_EXCHANGE_GlobalFee
+{
+
+  /**
+   * Signature affirming all of the data.
+   */
+  struct TALER_MasterSignatureP master_sig;
+
+  /**
+   * Starting time of the validity period (inclusive).
+   */
+  struct GNUNET_TIME_Timestamp start_date;
+
+  /**
+   * End time of the validity period (exclusive).
+   */
+  struct GNUNET_TIME_Timestamp end_date;
+
+  /**
+   * Unmerged purses will be timed out after at most this time.
+   */
+  struct GNUNET_TIME_Relative purse_timeout;
+
+  /**
+   * Accounts without KYC will be closed after this time.
+   */
+  struct GNUNET_TIME_Relative kyc_timeout;
+
+  /**
+   * Account history is limited to this timeframe.
+   */
+  struct GNUNET_TIME_Relative history_expiration;
+
+  /**
+   * Fees that apply globally, independent of denomination
+   * and wire method.
+   */
+  struct TALER_GlobalFeeSet fees;
+
+  /**
+   * Number of free purses per account.
+   */
+  uint32_t purse_account_limit;
+};
+
+
 /**
  * @brief Information about keys from the exchange.
  */
@@ -229,6 +278,11 @@ struct TALER_EXCHANGE_Keys
    */
   struct TALER_EXCHANGE_AuditorInformation *auditors;
 
+  /**
+   * Array with the global fees of the exchange.
+   */
+  struct TALER_EXCHANGE_GlobalFee *global_fees;
+
   /**
    * Supported Taler protocol version by the exchange.
    * String in the format current:revision:age using the
@@ -272,6 +326,11 @@ struct TALER_EXCHANGE_Keys
    */
   struct TALER_AgeMask age_mask;
 
+  /**
+   * Length of the @e global_fees array.
+   */
+  unsigned int num_global_fees;
+
   /**
    * Length of the @e sign_keys array (number of valid entries).
    */
diff --git a/src/include/taler_exchangedb_plugin.h b/src/include/taler_exchangedb_plugin.h
index 7696b607..fc909a1b 100644
--- a/src/include/taler_exchangedb_plugin.h
+++ b/src/include/taler_exchangedb_plugin.h
@@ -3968,7 +3968,7 @@ struct TALER_EXCHANGEDB_Plugin
    * Obtain information about the global fee structure of the exchange.
    *
    * @param cls closure
-   * @param cb function to call on each account
+   * @param cb function to call on each fee entry
    * @param cb_cls closure for @a cb
    * @return transaction status code
    */
diff --git a/src/include/taler_json_lib.h b/src/include/taler_json_lib.h
index 6238c07d..b4f99900 100644
--- a/src/include/taler_json_lib.h
+++ b/src/include/taler_json_lib.h
@@ -279,6 +279,30 @@ TALER_JSON_spec_amount_any_nbo (const char *name,
   TALER_JSON_pack_amount (pfx "_refund", &(dfs)->refund)
 
 
+/**
+ * Generate specification to parse all global fees.
+ *
+ * @param currency which currency to expect
+ * @param[out] gfs a `struct TALER_GlobalFeeSet` to initialize
+ */
+#define TALER_JSON_SPEC_GLOBAL_FEES(currency,gfs) \
+  TALER_JSON_spec_amount ("kyc_fee", (currency), &(gfs)->kyc), \
+  TALER_JSON_spec_amount ("history_fee", (currency), &(gfs)->history),   \
+  TALER_JSON_spec_amount ("account_fee", (currency), &(gfs)->account),   \
+  TALER_JSON_spec_amount ("purse_fee", (currency), &(gfs)->purse)
+
+/**
+ * Macro to pack all of the global fees.
+ *
+ * @param gfs a `struct TALER_GlobalFeeSet` to pack
+ */
+#define TALER_JSON_PACK_GLOBAL_FEES(gfs) \
+  TALER_JSON_pack_amount ("kyc_fee", &(gfs)->kyc),   \
+  TALER_JSON_pack_amount ("history_fee", &(gfs)->history),     \
+  TALER_JSON_pack_amount ("account_fee", &(gfs)->account),     \
+  TALER_JSON_pack_amount ("purse_fee", &(gfs)->purse)
+
+
 /**
  * Generate line in parser specification for denomination public key.
  *
-- 
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