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handle purse-refund and reserve-open-deposit events in coin history in libtalerexchange

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This commit is contained in:
Christian Grothoff 2022-10-15 22:14:20 +02:00
parent 518c7009e7
commit 745981c680
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GPG Key ID: 939E6BE1E29FC3CC
1 changed files with 121 additions and 2 deletions
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123
src/lib/exchange_api_common.c
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@ -1353,6 +1353,125 @@ help_purse_deposit (struct CoinHistoryParseContext *pc,
}
/**
* Handle purse refund entry in the coin's history.
*
* @param[in,out] pc overall context
* @param amount main amount of this operation
* @param transaction JSON details for the operation
* @return #GNUNET_SYSERR on error,
* #GNUNET_OK to add, #GNUNET_NO to subtract
*/
static enum GNUNET_GenericReturnValue
help_purse_refund (struct CoinHistoryParseContext *pc,
const struct TALER_Amount *amount,
json_t *transaction)
{
struct TALER_PurseContractPublicKeyP purse_pub;
struct TALER_Amount refund_fee;
struct TALER_ExchangePublicKeyP exchange_pub;
struct TALER_ExchangeSignatureP exchange_sig;
struct GNUNET_JSON_Specification spec[] = {
TALER_JSON_spec_amount_any ("refund_fee",
&refund_fee),
GNUNET_JSON_spec_fixed_auto ("purse_pub",
&purse_pub),
GNUNET_JSON_spec_fixed_auto ("exchange_sig",
&exchange_sig),
GNUNET_JSON_spec_fixed_auto ("exchange_pub",
&exchange_pub),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (transaction,
spec,
NULL, NULL))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_exchange_online_purse_refund_verify (
amount,
&refund_fee,
pc->coin_pub,
&purse_pub,
&exchange_pub,
&exchange_sig))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if ( (GNUNET_YES !=
TALER_amount_cmp_currency (&refund_fee,
&pc->dk->fees.refund)) ||
(0 !=
TALER_amount_cmp (&refund_fee,
&pc->dk->fees.refund)) )
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if (0 >
TALER_amount_add (&pc->rtotal,
&pc->rtotal,
amount))
{
/* overflow in refund history? inconceivable! Bad exchange! */
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
return GNUNET_NO;
}
/**
* Handle reserve deposit entry in the coin's history.
*
* @param[in,out] pc overall context
* @param amount main amount of this operation
* @param transaction JSON details for the operation
* @return #GNUNET_SYSERR on error,
* #GNUNET_OK to add, #GNUNET_NO to subtract
*/
static enum GNUNET_GenericReturnValue
help_reserve_open_deposit (struct CoinHistoryParseContext *pc,
const struct TALER_Amount *amount,
json_t *transaction)
{
struct TALER_ReserveSignatureP reserve_sig;
struct TALER_CoinSpendSignatureP coin_sig;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_fixed_auto ("reserve_sig",
&reserve_sig),
GNUNET_JSON_spec_fixed_auto ("coin_sig",
&coin_sig),
GNUNET_JSON_spec_end ()
};
if (GNUNET_OK !=
GNUNET_JSON_parse (transaction,
spec,
NULL, NULL))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_wallet_reserve_open_deposit_verify (
amount,
&reserve_sig,
pc->coin_pub,
&coin_sig))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
return GNUNET_YES;
}
enum GNUNET_GenericReturnValue
TALER_EXCHANGE_verify_coin_history (
const struct TALER_EXCHANGE_DenomPublicKey *dk,
@ -1373,8 +1492,8 @@ TALER_EXCHANGE_verify_coin_history (
{ "RECOUP-REFRESH", &help_recoup_refresh },
{ "OLD-COIN-RECOUP", &help_old_coin_recoup },
{ "PURSE-DEPOSIT", &help_purse_deposit },
// FIXME: PURSE-REFUND missing here!
// FIXME: RESERVE-DEPOSIT missing here!
{ "PURSE-REFUND", &help_purse_refund },
{ "RESERVE-OPEN-DEPOSIT", &help_reserve_open_deposit },
{ NULL, NULL }
};
struct CoinHistoryParseContext pc = {