diff options
Diffstat (limited to 'src/backend/taler-merchant-httpd_exchanges.h')
| -rw-r--r-- | src/backend/taler-merchant-httpd_exchanges.h | 154 |
1 files changed, 119 insertions, 35 deletions
diff --git a/src/backend/taler-merchant-httpd_exchanges.h b/src/backend/taler-merchant-httpd_exchanges.h index df68b9a5..892843f6 100644 --- a/src/backend/taler-merchant-httpd_exchanges.h +++ b/src/backend/taler-merchant-httpd_exchanges.h @@ -1,6 +1,6 @@ /* This file is part of TALER - (C) 2014-2020 Taler Systems SA + (C) 2014-2023 Taler Systems SA TALER is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -31,9 +31,9 @@ /** - * List of our trusted exchanges in JSON format for inclusion in contracts. + * Exchange */ -extern json_t *TMH_trusted_exchanges; +struct TMH_Exchange; /** @@ -55,61 +55,145 @@ TMH_EXCHANGES_done (void); /** - * Function called with the result of a #TMH_EXCHANGES_find_exchange() + * Function called with the result of a #TMH_EXCHANGES_keys4exchange() * operation. * * @param cls closure - * @param hr HTTP response details - * @param eh handle to the exchange context - * @param payto_uri payto://-URI of the exchange - * @param wire_fee current applicable wire fee for dealing with @a eh, NULL if not available - * @param exchange_trusted true if this exchange is trusted by config + * @param keys the keys of the exchange + * @param exchange representation of the exchange */ typedef void -(*TMH_EXCHANGES_FindContinuation)(void *cls, - const struct TALER_EXCHANGE_HttpResponse *hr, - struct TALER_EXCHANGE_Handle *eh, - const char *payto_uri, - const struct TALER_Amount *wire_fee, - bool exchange_trusted); +(*TMH_EXCHANGES_Find2Continuation)( + void *cls, + struct TALER_EXCHANGE_Keys *keys, + struct TMH_Exchange *exchange); /** - * Information we keep for a pending #MMH_EXCHANGES_find_exchange() operation. + * Information we keep for a pending #MMH_EXCHANGES_keys4exchange() operation. */ -struct TMH_EXCHANGES_FindOperation; +struct TMH_EXCHANGES_KeysOperation; /** - * Find a exchange that matches @a chosen_exchange. If we cannot connect - * to the exchange, or if it is not acceptable, @a fc is called with - * NULL for the exchange. + * Get /keys of the given @a exchange. * - * @param chosen_exchange URL of the exchange we would like to talk to - * @param wire_method the wire method we will use with @a chosen_exchange, NULL for none - * @param force_reload try to force reloading /keys from the exchange ASAP; note - * that IF the forced reload fails, it is possible @a fc won't be called at all - * until a /keys download succeeds; only use #GNUNET_YES if a new /keys request - * is mandatory. If the force reload request is not allowed due to our rate limiting, - * then @a fc will be called immediately with the existing /keys data + * @param exchange URL of the exchange we would like to talk to + * @param force_download force /keys download now * @param fc function to call with the handles for the exchange * @param fc_cls closure for @a fc */ -struct TMH_EXCHANGES_FindOperation * -TMH_EXCHANGES_find_exchange (const char *chosen_exchange, - const char *wire_method, - int force_reload, - TMH_EXCHANGES_FindContinuation fc, - void *fc_cls); +struct TMH_EXCHANGES_KeysOperation * +TMH_EXCHANGES_keys4exchange ( + const char *exchange, + bool force_download, + TMH_EXCHANGES_Find2Continuation fc, + void *fc_cls); /** - * Abort pending find operation. + * Abort pending keys details lookup operation. * * @param fo handle to operation to abort */ void -TMH_EXCHANGES_find_exchange_cancel (struct TMH_EXCHANGES_FindOperation *fo); +TMH_EXCHANGES_keys4exchange_cancel (struct TMH_EXCHANGES_KeysOperation *fo); + + +/** + * Callback on an exchange known to us. Does not warrant + * that the "keys" information is actually available for + * @a exchange. + * + * @param cls closure + * @param url base URL of the exchange + * @param exchange internal handle for the exchange + */ +typedef void +(*TMH_ExchangeCallback)(void *cls, + const char *url, + const struct TMH_Exchange *exchange); + + +/** + * Return all trusted exchanges to @a cb. + * + * @param cb function to call + * @param cb_cls closure for @a cb + */ +void +TMH_exchange_get_trusted (TMH_ExchangeCallback cb, + void *cb_cls); + + +/** + * Return the master public key of the given @a exchange. + * Will be returned from configuration for trusted + * exchanges. + * + * @param exchange exchange to get master public key for + * @return the master public key of @a exchange + */ +const struct TALER_MasterPublicKeyP * +TMH_EXCHANGES_get_master_pub ( + const struct TMH_Exchange *exchange); + + +/** + * Return the currency of the given @a exchange. + * Will be returned from configuration for trusted + * exchanges. + * + * @param exchange exchange to get master public key for + * @return the currency of @a exchange + */ +const char * +TMH_EXCHANGES_get_currency ( + const struct TMH_Exchange *exchange); + + +/** + * Lookup current wire fee by @a exchange_url and @a wire_method. + * + * @param exchange the exchange to check + * @param wire_method wire method to lookup fee by + * @param[out] wire_fee set to the wire fee + * @return #GNUNET_OK on success + * #GNUNET_NO if @a wire_method is not supported + * #GNUNET_SYSERR if @a exchange_url did not yet respond properly to our /wire request + */ +enum GNUNET_GenericReturnValue +TMH_EXCHANGES_lookup_wire_fee ( + const struct TMH_Exchange *exchange, + const char *wire_method, + struct TALER_Amount *wire_fee); + + +/** + * Check if we would trust @a ex to deposit funds into our account @a + * wm. Checks that both @a ex is trusted and that @a ex allows wire transfers + * into the account given in @a wm. + * + * @param exchange the exchange to check + * @param wm the wire method to check with + * @return #GNUNET_OK if such a debit can happen + */ +enum GNUNET_GenericReturnValue +TMH_exchange_check_debit ( + const struct TMH_Exchange *exchange, + const struct TMH_WireMethod *wm); + + +/** + * Check if we support the given currency (by having an + * exchange configured with it). + * + * @param currency currency to check + * @return true if the currency is supported + */ +bool +TMH_test_exchange_configured_for_currency ( + const char *currency); #endif |