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-rw-r--r--src/lib/exchange_api_handle.h121
1 files changed, 121 insertions, 0 deletions
diff --git a/src/lib/exchange_api_handle.h b/src/lib/exchange_api_handle.h
index b4b8ccf5..1a7e8ee7 100644
--- a/src/lib/exchange_api_handle.h
+++ b/src/lib/exchange_api_handle.h
@@ -58,6 +58,118 @@ struct TEAH_AuditorInteractionEntry
struct TALER_AUDITOR_DepositConfirmationHandle *dch;
};
+/**
+ * Stages of initialization for the `struct TALER_EXCHANGE_Handle`
+ */
+enum ExchangeHandleState
+{
+ /**
+ * Just allocated.
+ */
+ MHS_INIT = 0,
+
+ /**
+ * Obtained the exchange's certification data and keys.
+ */
+ MHS_CERT = 1,
+
+ /**
+ * Failed to initialize (fatal).
+ */
+ MHS_FAILED = 2
+};
+
+
+/**
+ * Handle to the exchange
+ */
+struct TALER_EXCHANGE_Handle
+{
+ /**
+ * The context of this handle
+ */
+ struct GNUNET_CURL_Context *ctx;
+
+ /**
+ * The URL of the exchange (i.e. "http://exchange.taler.net/")
+ */
+ char *url;
+
+ /**
+ * Function to call with the exchange's certification data,
+ * NULL if this has already been done.
+ */
+ TALER_EXCHANGE_CertificationCallback cert_cb;
+
+ /**
+ * Closure to pass to @e cert_cb.
+ */
+ void *cert_cb_cls;
+
+ /**
+ * Data for the request to get the /keys of a exchange,
+ * NULL once we are past stage #MHS_INIT.
+ */
+ struct KeysRequest *kr;
+
+ /**
+ * Task for retrying /keys request.
+ */
+ struct GNUNET_SCHEDULER_Task *retry_task;
+
+ /**
+ * Raw key data of the exchange, only valid if
+ * @e handshake_complete is past stage #MHS_CERT.
+ */
+ json_t *key_data_raw;
+
+ /**
+ * Head of DLL of auditors of this exchange.
+ */
+ struct TEAH_AuditorListEntry *auditors_head;
+
+ /**
+ * Tail of DLL of auditors of this exchange.
+ */
+ struct TEAH_AuditorListEntry *auditors_tail;
+
+ /**
+ * Key data of the exchange, only valid if
+ * @e handshake_complete is past stage #MHS_CERT.
+ */
+ struct TALER_EXCHANGE_Keys key_data;
+
+ /**
+ * Retry /keys frequency.
+ */
+ struct GNUNET_TIME_Relative retry_delay;
+
+ /**
+ * When does @e key_data expire?
+ */
+ struct GNUNET_TIME_Absolute key_data_expiration;
+
+ /**
+ * Number of subsequent failed requests to /keys.
+ *
+ * Used to compute the CURL timeout for the request.
+ */
+ unsigned int keys_error_count;
+
+ /**
+ * Number of subsequent failed requests to /wire.
+ *
+ * Used to compute the CURL timeout for the request.
+ */
+ unsigned int wire_error_count;
+
+ /**
+ * Stage of the exchange's initialization routines.
+ */
+ enum ExchangeHandleState state;
+
+};
+
/**
* Function called for each auditor to give us a chance to possibly
@@ -120,6 +232,15 @@ TEAH_handle_to_context (struct TALER_EXCHANGE_Handle *h);
int
TEAH_handle_is_ready (struct TALER_EXCHANGE_Handle *h);
+/**
+ * Check if the handle is ready to process requests.
+ *
+ * @param h the exchange handle to query
+ * @return #GNUNET_YES if we are ready, #GNUNET_NO if not
+ */
+int
+TEAH_handle_is_ready (struct TALER_EXCHANGE_Handle *h);
+
/**
* Obtain the URL to use for an API request.