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clean up transfer get logic

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This commit is contained in:
Christian Grothoff 2020-03-16 17:28:31 +01:00
parent 3630d91d29
commit af61713619
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GPG Key ID: 939E6BE1E29FC3CC
1 changed files with 109 additions and 93 deletions
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202
src/exchange/taler-exchange-httpd_transfers_get.c
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@ -15,7 +15,7 @@
*/
/**
* @file taler-exchange-httpd_transfers_get.c
* @brief Handle wire transfer /track/transfer requests
* @brief Handle wire transfer(s) GET requests
* @author Christian Grothoff
*/
#include "platform.h"
@ -32,38 +32,39 @@
/**
* Detail for /wire/deposit response.
* Information about one of the transactions that was
* aggregated, to be returned in the /transfers response.
*/
struct TEH_TrackTransferDetail
struct AggregatedDepositDetail
{
/**
* We keep deposit details in a DLL.
*/
struct TEH_TrackTransferDetail *next;
struct AggregatedDepositDetail *next;
/**
* We keep deposit details in a DLL.
*/
struct TEH_TrackTransferDetail *prev;
struct AggregatedDepositDetail *prev;
/**
* Hash of the proposal data.
* Hash of the contract terms.
*/
struct GNUNET_HashCode h_contract_terms;
/**
* Coin's public key.
* Coin's public key of the deposited coin.
*/
struct TALER_CoinSpendPublicKeyP coin_pub;
/**
* Total value of the coin.
* Total value of the coin in the deposit.
*/
struct TALER_Amount deposit_value;
/**
* Fees charged by the exchange for the deposit.
* Fees charged by the exchange for the deposit of this coin.
*/
struct TALER_Amount deposit_fee;
};
@ -83,16 +84,14 @@ struct TEH_TrackTransferDetail
* @return MHD result code
*/
static int
reply_track_transfer_details (struct MHD_Connection *connection,
const struct TALER_Amount *total,
const struct
TALER_MerchantPublicKeyP *merchant_pub,
const struct GNUNET_HashCode *h_wire,
const struct TALER_Amount *wire_fee,
struct GNUNET_TIME_Absolute exec_time,
const struct TEH_TrackTransferDetail *wdd_head)
reply_transfer_details (struct MHD_Connection *connection,
const struct TALER_Amount *total,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct GNUNET_HashCode *h_wire,
const struct TALER_Amount *wire_fee,
struct GNUNET_TIME_Absolute exec_time,
const struct AggregatedDepositDetail *wdd_head)
{
const struct TEH_TrackTransferDetail *wdd_pos;
json_t *deposits;
struct TALER_WireDepositDetailP dd;
struct GNUNET_HashContext *hash_context;
@ -102,8 +101,18 @@ reply_track_transfer_details (struct MHD_Connection *connection,
GNUNET_TIME_round_abs (&exec_time);
deposits = json_array ();
if (NULL == deposits)
{
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_JSON_ALLOCATION_FAILURE,
"json_array() failed");
}
hash_context = GNUNET_CRYPTO_hash_context_start ();
for (wdd_pos = wdd_head; NULL != wdd_pos; wdd_pos = wdd_pos->next)
for (const struct AggregatedDepositDetail *wdd_pos = wdd_head;
NULL != wdd_pos;
wdd_pos = wdd_pos->next)
{
dd.h_contract_terms = wdd_pos->h_contract_terms;
dd.execution_time = GNUNET_TIME_absolute_hton (exec_time);
@ -115,22 +124,29 @@ reply_track_transfer_details (struct MHD_Connection *connection,
GNUNET_CRYPTO_hash_context_read (hash_context,
&dd,
sizeof (struct TALER_WireDepositDetailP));
GNUNET_assert (0 ==
json_array_append_new (deposits,
json_pack ("{s:o, s:o, s:o, s:o}",
"h_contract_terms",
GNUNET_JSON_from_data_auto (
&wdd_pos->
h_contract_terms),
"coin_pub",
GNUNET_JSON_from_data_auto (
&wdd_pos->coin_pub),
"deposit_value",
TALER_JSON_from_amount (
&wdd_pos->deposit_value),
"deposit_fee",
TALER_JSON_from_amount (
&wdd_pos->deposit_fee))));
if (0 !=
json_array_append_new (deposits,
json_pack ("{s:o, s:o, s:o, s:o}",
"h_contract_terms",
GNUNET_JSON_from_data_auto (
&wdd_pos->h_contract_terms),
"coin_pub",
GNUNET_JSON_from_data_auto (
&wdd_pos->coin_pub),
"deposit_value",
TALER_JSON_from_amount (
&wdd_pos->deposit_value),
"deposit_fee",
TALER_JSON_from_amount (
&wdd_pos->deposit_fee))))
{
json_decref (deposits);
GNUNET_CRYPTO_hash_context_abort (hash_context);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_JSON_ALLOCATION_FAILURE,
"json_array_append_new() failed");
}
}
wdp.purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_CONFIRM_WIRE_DEPOSIT);
wdp.purpose.size = htonl (sizeof (struct TALER_WireDepositDataPS));
@ -224,12 +240,12 @@ struct WtidTransactionContext
/**
* Head of DLL with details for /wire/deposit response.
*/
struct TEH_TrackTransferDetail *wdd_head;
struct AggregatedDepositDetail *wdd_head;
/**
* Head of DLL with details for /wire/deposit response.
*/
struct TEH_TrackTransferDetail *wdd_tail;
struct AggregatedDepositDetail *wdd_tail;
/**
* JSON array with details about the individual deposits.
@ -249,8 +265,8 @@ struct WtidTransactionContext
/**
* Function called with the results of the lookup of the
* transaction data for the given wire transfer identifier.
* Function called with the results of the lookup of the individual deposits
* that were aggregated for the given wire transfer.
*
* @param cls our context for transmission
* @param rowid which row in the DB is the information from (for diagnostics), ignored
@ -265,21 +281,21 @@ struct WtidTransactionContext
* @param deposit_fee deposit fee charged by exchange for this coin
*/
static void
handle_transaction_data (void *cls,
uint64_t rowid,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct GNUNET_HashCode *h_wire,
const json_t *wire,
struct GNUNET_TIME_Absolute exec_time,
const struct GNUNET_HashCode *h_contract_terms,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *deposit_value,
const struct TALER_Amount *deposit_fee)
handle_deposit_data (void *cls,
uint64_t rowid,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct GNUNET_HashCode *h_wire,
const json_t *wire,
struct GNUNET_TIME_Absolute exec_time,
const struct GNUNET_HashCode *h_contract_terms,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_Amount *deposit_value,
const struct TALER_Amount *deposit_fee)
{
struct WtidTransactionContext *ctx = cls;
struct TALER_Amount delta;
struct TEH_TrackTransferDetail *wdd;
struct AggregatedDepositDetail *wdd;
char *wire_method;
(void) rowid;
@ -343,7 +359,7 @@ handle_transaction_data (void *cls,
return;
}
}
wdd = GNUNET_new (struct TEH_TrackTransferDetail);
wdd = GNUNET_new (struct AggregatedDepositDetail);
wdd->deposit_value = *deposit_value;
wdd->deposit_fee = *deposit_fee;
wdd->h_contract_terms = *h_contract_terms;
@ -355,8 +371,30 @@ handle_transaction_data (void *cls,
/**
* Execute a "/track/transfer". Returns the transaction information
* associated with the given wire transfer identifier.
* Free data structure reachable from @a ctx, but not @a ctx itself.
*
* @param ctx context to free
*/
static void
free_ctx (struct WtidTransactionContext *ctx)
{
struct AggregatedDepositDetail *wdd;
while (NULL != (wdd = ctx->wdd_head))
{
GNUNET_CONTAINER_DLL_remove (ctx->wdd_head,
ctx->wdd_tail,
wdd);
GNUNET_free (wdd);
}
GNUNET_free_non_null (ctx->wire_method);
ctx->wire_method = NULL;
}
/**
* Execute a "/transfers" GET operation. Returns the deposit details of the
* deposits that were aggregated to create the given wire transfer.
*
* If it returns a non-error code, the transaction logic MUST
* NOT queue a MHD response. IF it returns an hard error, the
@ -372,10 +410,10 @@ handle_transaction_data (void *cls,
* @return transaction status
*/
static enum GNUNET_DB_QueryStatus
track_transfer_transaction (void *cls,
struct MHD_Connection *connection,
struct TALER_EXCHANGEDB_Session *session,
int *mhd_ret)
get_transfer_deposits (void *cls,
struct MHD_Connection *connection,
struct TALER_EXCHANGEDB_Session *session,
int *mhd_ret)
{
struct WtidTransactionContext *ctx = cls;
enum GNUNET_DB_QueryStatus qs;
@ -384,14 +422,13 @@ track_transfer_transaction (void *cls,
struct TALER_MasterSignatureP wire_fee_master_sig;
struct TALER_Amount closing_fee;
ctx->is_valid = GNUNET_NO;
ctx->wdd_head = NULL;
ctx->wdd_tail = NULL;
ctx->wire_method = NULL;
/* resetting to NULL/0 in case transaction was repeated after
serialization failure */
free_ctx (ctx);
qs = TEH_plugin->lookup_wire_transfer (TEH_plugin->cls,
session,
&ctx->wtid,
&handle_transaction_data,
&handle_deposit_data,
ctx);
if (0 > qs)
{
@ -460,27 +497,6 @@ track_transfer_transaction (void *cls,
}
/**
* Free data structure reachable from @a ctx, but not @a ctx itself.
*
* @param ctx context to free
*/
static void
free_ctx (struct WtidTransactionContext *ctx)
{
struct TEH_TrackTransferDetail *wdd;
while (NULL != (wdd = ctx->wdd_head))
{
GNUNET_CONTAINER_DLL_remove (ctx->wdd_head,
ctx->wdd_tail,
wdd);
GNUNET_free (wdd);
}
GNUNET_free_non_null (ctx->wire_method);
}
/**
* Handle a GET "/transfers/$WTID" request.
*
@ -515,21 +531,21 @@ TEH_handler_transfers_get (const struct TEH_RequestHandler *rh,
}
if (GNUNET_OK !=
TEH_DB_run_transaction (connection,
"run track transfer",
"run transfers GET",
&mhd_ret,
&track_transfer_transaction,
&get_transfer_deposits,
&ctx))
{
free_ctx (&ctx);
return mhd_ret;
}
mhd_ret = reply_track_transfer_details (connection,
&ctx.total,
&ctx.merchant_pub,
&ctx.h_wire,
&ctx.wire_fee,
ctx.exec_time,
ctx.wdd_head);
mhd_ret = reply_transfer_details (connection,
&ctx.total,
&ctx.merchant_pub,
&ctx.h_wire,
&ctx.wire_fee,
ctx.exec_time,
ctx.wdd_head);
free_ctx (&ctx);
return mhd_ret;
}