diff options
| -rw-r--r-- | src/exchangedb/plugin_exchangedb_postgres.c | 123 | ||||
| -rw-r--r-- | src/include/taler_exchangedb_plugin.h | 40 |
2 files changed, 163 insertions, 0 deletions
diff --git a/src/exchangedb/plugin_exchangedb_postgres.c b/src/exchangedb/plugin_exchangedb_postgres.c index 36ae3e54e..9c91259ba 100644 --- a/src/exchangedb/plugin_exchangedb_postgres.c +++ b/src/exchangedb/plugin_exchangedb_postgres.c @@ -3033,6 +3033,128 @@ postgres_insert_refund (void *cls, /** + * Closure for #get_refunds_cb(). + */ +struct SelectRefundContext +{ + /** + * Function to call on each result. + */ + TALER_EXCHANGEDB_RefundCoinCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Set to #GNUNET_SYSERR on error. + */ + int status; +}; + + +/** + * Function to be called with the results of a SELECT statement + * that has returned @a num_results results. + * + * @param cls closure of type `struct SelectRefundContext *` + * @param result the postgres result + * @param num_result the number of results in @a result + */ +static void +get_refunds_cb (void *cls, + PGresult *result, + unsigned int num_results) +{ + struct SelectRefundContext *srctx = cls; + + for (unsigned int i=0;i<num_results;i++) + { + struct TALER_MerchantPublicKeyP merchant_pub; + struct TALER_MerchantSignatureP merchant_sig; + struct GNUNET_HashCode h_contract; + uint64_t rtransaction_id; + struct TALER_Amount amount_with_fee; + struct TALER_Amount refund_fee; + struct GNUNET_PQ_ResultSpec rs[] = { + GNUNET_PQ_result_spec_auto_from_type ("merchant_pub", + &merchant_pub), + GNUNET_PQ_result_spec_auto_from_type ("merchant_sig", + &merchant_sig), + GNUNET_PQ_result_spec_auto_from_type ("h_contract", + &h_contract), + GNUNET_PQ_result_spec_uint64 ("rtransaction_id", + &rtransaction_id), + TALER_PQ_result_spec_amount ("amount_with_fee", + &amount_with_fee), + TALER_PQ_result_spec_amount ("fee_refund", + &refund_fee), + GNUNET_PQ_result_spec_end + }; + + if (GNUNET_OK != + GNUNET_PQ_extract_result (result, + rs, + i)) + { + GNUNET_break (0); + srctx->status = GNUNET_SYSERR; + return; + } + if (GNUNET_OK != + srctx->cb (srctx->cb_cls, + &merchant_pub, + &merchant_sig, + &h_contract, + rtransaction_id, + &amount_with_fee, + &refund_fee)) + return; + } +} + + +/** + * Select refunds by @a coin_pub. + * + * @param cls closure of plugin + * @param session database handle to use + * @param coin_pub coin to get refunds for + * @param cb function to call for each refund found + * @param cb_cls closure for @a cb + * @return query result status + */ +static enum GNUNET_DB_QueryStatus +postgres_select_refunds_by_coin (void *cls, + struct TALER_EXCHANGEDB_Session *session, + const struct TALER_CoinSpendPublicKeyP *coin_pub, + TALER_EXCHANGEDB_RefundCoinCallback cb, + void *cb_cls) +{ + enum GNUNET_DB_QueryStatus qs; + struct GNUNET_PQ_QueryParam params[] = { + GNUNET_PQ_query_param_auto_from_type (coin_pub), + GNUNET_PQ_query_param_end + }; + struct SelectRefundContext srctx = { + .cb = cb, + .cb_cls = cb_cls, + .status = GNUNET_OK + }; + + qs = GNUNET_PQ_eval_prepared_multi_select (session->conn, + "get_refunds_by_coin", + params, + &get_refunds_cb, + &srctx); + if (GNUNET_SYSERR == srctx.status) + return GNUNET_DB_STATUS_HARD_ERROR; + return qs; +} + + +/** * Lookup refresh melt commitment data under the given @a rc. * * @param cls the `struct PostgresClosure` with the plugin-specific state @@ -6236,6 +6358,7 @@ libtaler_plugin_exchangedb_postgres_init (void *cls) plugin->iterate_matching_deposits = &postgres_iterate_matching_deposits; plugin->insert_deposit = &postgres_insert_deposit; plugin->insert_refund = &postgres_insert_refund; + plugin->select_refunds_by_coin = &postgres_select_refunds_by_coin; plugin->insert_melt = &postgres_insert_melt; plugin->get_melt = &postgres_get_melt; plugin->insert_refresh_reveal = &postgres_insert_refresh_reveal; diff --git a/src/include/taler_exchangedb_plugin.h b/src/include/taler_exchangedb_plugin.h index e64b0ad4c..c531d8384 100644 --- a/src/include/taler_exchangedb_plugin.h +++ b/src/include/taler_exchangedb_plugin.h @@ -733,6 +733,29 @@ typedef int /** + * Callback invoked with information about refunds applicable + * to a particular coin. + * + * @param cls closure + * @param merchant_pub public key of merchant who authorized refund + * @param merchant_sig signature of merchant authorizing refund + * @param h_contract hash of contract being refunded + * @param rtransaction_id refund transaction ID + * @param amount_with_fee amount being refunded + * @param refund_fee fee the exchange keeps for the refund processing + * @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop + */ +typedef int +(*TALER_EXCHANGEDB_RefundCoinCallback)(void *cls, + const struct TALER_MerchantPublicKeyP *merchant_pub, + const struct TALER_MerchantSignatureP *merchant_sig, + const struct GNUNET_HashCode *h_contract, + uint64_t rtransaction_id, + const struct TALER_Amount *amount_with_fee, + const struct TALER_Amount *refund_fee); + + +/** * Information about a coin that was revealed to the exchange * during /refresh/reveal. */ @@ -1358,6 +1381,23 @@ struct TALER_EXCHANGEDB_Plugin struct TALER_EXCHANGEDB_Session *session, const struct TALER_EXCHANGEDB_Refund *refund); + /** + * Select refunds by @a coin_pub. + * + * @param cls closure of plugin + * @param session database handle to use + * @param coin_pub coin to get refunds for + * @param cb function to call for each refund found + * @param cb_cls closure for @a cb + * @return query result status + */ + enum GNUNET_DB_QueryStatus + (*select_refunds_by_coin)(void *cls, + struct TALER_EXCHANGEDB_Session *session, + const struct TALER_CoinSpendPublicKeyP *coin_pub, + TALER_EXCHANGEDB_RefundCoinCallback cb, + void *cb_cls); + /** * Mark a deposit as tiny, thereby declaring that it cannot be |