trezor-firmware/core/embed/extmod/modtrezorcrypto/modtrezorcrypto-nem.h

/*
 * This file is part of the Trezor project, https://trezor.io/
 *
 * Copyright (c) SatoshiLabs
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "py/objstr.h"

#include "embed/extmod/trezorobj.h"

#include "nem.h"

/// package: trezorcrypto.nem

/// def validate_address(address: str, network: int) -> bool:
///     """
///     Validate a NEM address
///     """
STATIC mp_obj_t mod_trezorcrypto_nem_validate_address(mp_obj_t address,
                                                      mp_obj_t network) {
  mp_buffer_info_t addr;
  mp_get_buffer_raise(address, &addr, MP_BUFFER_READ);

  uint32_t n = trezor_obj_get_uint(network);
  return mp_obj_new_bool(nem_validate_address(addr.buf, n));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_nem_validate_address_obj,
                                 mod_trezorcrypto_nem_validate_address);

/// def compute_address(public_key: bytes, network: int) -> str:
///     """
///     Compute a NEM address from a public key
///     """
STATIC mp_obj_t mod_trezorcrypto_nem_compute_address(mp_obj_t public_key,
                                                     mp_obj_t network) {
  mp_buffer_info_t p;
  mp_get_buffer_raise(public_key, &p, MP_BUFFER_READ);

  uint32_t n = trezor_obj_get_uint(network);

  char address[NEM_ADDRESS_SIZE + 1];  // + 1 for the 0 byte
  if (!nem_get_address(p.buf, n, address)) {
    mp_raise_ValueError(
        "Failed to compute a NEM address from provided public key");
  }
  return mp_obj_new_str_of_type(&mp_type_str, (const uint8_t *)address,
                                strlen(address));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_nem_compute_address_obj,
                                 mod_trezorcrypto_nem_compute_address);

// objects definition
STATIC const mp_rom_map_elem_t mod_trezorcrypto_nem_globals_table[] = {
    {MP_ROM_QSTR(MP_QSTR_validate_address),
     MP_ROM_PTR(&mod_trezorcrypto_nem_validate_address_obj)},
    {MP_ROM_QSTR(MP_QSTR_compute_address),
     MP_ROM_PTR(&mod_trezorcrypto_nem_compute_address_obj)},
};
STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_nem_globals,
                            mod_trezorcrypto_nem_globals_table);

// module definition
STATIC const mp_obj_module_t mod_trezorcrypto_nem_module = {
    .base = {&mp_type_module},
    .globals = (mp_obj_dict_t *)&mod_trezorcrypto_nem_globals,
};