taler-exchange-httpd_reveal-melt.h (2120B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2023 Taler Systems SA 4 5 TALER is free software; you can redistribute it and/or modify it under the 6 terms of the GNU Affero General Public License as published by the Free Software 7 Foundation; either version 3, or (at your option) any later version. 8 9 TALER is distributed in the hope that it will be useful, but WITHOUT ANY 10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. 12 13 You should have received a copy of the GNU Affero General Public License along with 14 TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> 15 */ 16 /** 17 * @file taler-exchange-httpd_reveal-melt.h 18 * @brief Handle /reveal-melt requests 19 * @author Özgür Kesim 20 */ 21 #ifndef TALER_EXCHANGE_HTTPD_REVEAL_MELT_H 22 #define TALER_EXCHANGE_HTTPD_REVEAL_MELT_H 23 24 #include <microhttpd.h> 25 #include "taler-exchange-httpd.h" 26 27 28 /** 29 * Handle a "/reveal-melt" request. 30 * 31 * The client got a noreveal_index in response to a previous request 32 * /melt. It now has to reveal all n*(kappa-1) signatures (except for the 33 * noreveal_index), signed by the old coin private key, over the coin's 34 * specific nonce, which is derived per coin from the refresh_seed, 35 * From that signature also all other coin-relevant data (blinding, age 36 * restriction, nonce) are derived from. 37 * 38 * The exchange computes those values, potentially ensures that age restriction 39 * is correctly applied, calculates the hash of the blinded envelopes, and - 40 * together with the non-disclosed blinded envelopes - compares the hash of the 41 * calculated melt commitment against the original. 42 * 43 * If all those checks and the used denominations turn out to be correct, the 44 * exchange signs all blinded envelopes with their appropriate denomination 45 * keys. 46 * 47 * @param rc request context 48 * @param root uploaded JSON data 49 * @param args not used 50 * @return MHD result code 51 */ 52 MHD_RESULT 53 TEH_handler_reveal_melt ( 54 struct TEH_RequestContext *rc, 55 const json_t *root, 56 const char *const args[2]); 57 58 #endif