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Encode restore height into seed extra data
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| Original file line number | Diff line number | Diff line change |
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| // Copyright (c) 2020, Ryo Currency Project | ||
| // Portions copyright (c) 2014-2018, The Monero Project | ||
| // | ||
| // Portions of this file are available under BSD-3 license. Please see ORIGINAL-LICENSE for details | ||
| // All rights reserved. | ||
| // | ||
| // Authors and copyright holders give permission for following: | ||
| // | ||
| // 1. Redistribution and use in source and binary forms WITHOUT modification. | ||
| // | ||
| // 2. Modification of the source form for your own personal use. | ||
| // | ||
| // As long as the following conditions are met: | ||
| // | ||
| // 3. You must not distribute modified copies of the work to third parties. This includes | ||
| // posting the work online, or hosting copies of the modified work for download. | ||
| // | ||
| // 4. Any derivative version of this work is also covered by this license, including point 8. | ||
| // | ||
| // 5. Neither the name of the copyright holders nor the names of the authors may be | ||
| // used to endorse or promote products derived from this software without specific | ||
| // prior written permission. | ||
| // | ||
| // 6. You agree that this licence is governed by and shall be construed in accordance | ||
| // with the laws of England and Wales. | ||
| // | ||
| // 7. You agree to submit all disputes arising out of or in connection with this licence | ||
| // to the exclusive jurisdiction of the Courts of England and Wales. | ||
| // | ||
| // Authors and copyright holders agree that: | ||
| // | ||
| // 8. This licence expires and the work covered by it is released into the | ||
| // public domain on 1st of February 2021 | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY | ||
| // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
| // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | ||
| // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
| // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | ||
| // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF | ||
| // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| // | ||
| // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers | ||
|
|
||
| #include <inttypes.h> | ||
|
|
||
| struct acc_options | ||
| { | ||
| static constexpr uint8_t ACC_OPT_UNKNOWN = 0; | ||
| static constexpr uint8_t ACC_OPT_KURZ_ADDRESS = 1; | ||
| static constexpr uint8_t ACC_OPT_LONG_ADDRESS = 2; | ||
|
|
||
| static constexpr uint64_t BC_HEIGHT_PERIOD = 100000; | ||
| static constexpr uint64_t BC_HEIGHT_ZERO_V = 300000; | ||
|
|
||
| acc_options() : acc_opt_val(0) {} | ||
|
|
||
| acc_options(uint8_t keying_type) : acc_opt_val(0) | ||
| { | ||
| set_keying_type(keying_type); | ||
| } | ||
|
|
||
| acc_options(uint8_t keying_type, uint64_t bc_height) : acc_opt_val(0) | ||
| { | ||
| set_keying_type(keying_type); | ||
| set_seed_restore_height(bc_height); | ||
| } | ||
|
|
||
| uint8_t get_keying_type() const | ||
| { | ||
| if(acc_opt_val == 0) | ||
| return ACC_OPT_UNKNOWN; | ||
| else if((acc_opt_val & 3) == 1) | ||
| return ACC_OPT_KURZ_ADDRESS; | ||
| else if((acc_opt_val & 3) == 2) | ||
| return ACC_OPT_LONG_ADDRESS; | ||
| else | ||
| return ACC_OPT_UNKNOWN; | ||
| } | ||
|
|
||
| void set_keying_type(uint8_t type) | ||
| { | ||
| acc_opt_val &= 0xfc; | ||
| if(type == ACC_OPT_KURZ_ADDRESS) | ||
| acc_opt_val |= 0x01; | ||
| else if(type == ACC_OPT_LONG_ADDRESS) | ||
| acc_opt_val |= 0x02; | ||
| } | ||
|
|
||
| void set_seed_restore_height(uint64_t bc_height) | ||
| { | ||
| if(bc_height <= BC_HEIGHT_ZERO_V) | ||
| return; | ||
|
|
||
| bc_height -= BC_HEIGHT_ZERO_V; | ||
| bc_height /= BC_HEIGHT_PERIOD; | ||
| bc_height = std::min<uint64_t>(bc_height, 15); // 4 bits | ||
| acc_opt_val |= bc_height << 4; | ||
| } | ||
|
|
||
| uint64_t get_seed_restore_height() | ||
| { | ||
| uint64_t height = acc_opt_val >> 4; | ||
| if(height == 0) | ||
| return 0; | ||
| else | ||
| return height * BC_HEIGHT_PERIOD + BC_HEIGHT_ZERO_V; | ||
| } | ||
|
|
||
| uint8_t get_opt_value() const | ||
| { | ||
| return acc_opt_val; | ||
| } | ||
|
|
||
| void set_opt_value(uint8_t v) | ||
| { | ||
| acc_opt_val = v; | ||
| } | ||
|
|
||
| private: | ||
| uint8_t acc_opt_val = 0; | ||
| }; |
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