1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
This file is part of cpp-ethereum.
cpp-ethereum 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.
cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file ethash.h
* @date 2015
*/
#pragma once
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <stddef.h>
#include "compiler.h"
#define REVISION 18
#define DAGSIZE_BYTES_INIT 1073741824U
#define DAG_GROWTH 113000000U
#define EPOCH_LENGTH 30000U
#define MIX_BYTES 128
#define DAG_PARENTS 256
#define CACHE_ROUNDS 3
#define ACCESSES 64
#ifdef __cplusplus
extern "C" {
#endif
typedef struct ethash_params {
size_t full_size; // Size of full data set (in bytes, multiple of mix size (128)).
size_t cache_size; // Size of compute cache (in bytes, multiple of node size (64)).
} ethash_params;
typedef struct ethash_return_value {
uint8_t result[32];
uint8_t mix_hash[32];
} ethash_return_value;
size_t const ethash_get_datasize(const uint32_t block_number);
size_t const ethash_get_cachesize(const uint32_t block_number);
// initialize the parameters
static inline void ethash_params_init(ethash_params *params, const uint32_t block_number) {
params->full_size = ethash_get_datasize(block_number);
params->cache_size = ethash_get_cachesize(block_number);
}
typedef struct ethash_cache {
void *mem;
} ethash_cache;
void ethash_mkcache(ethash_cache *cache, ethash_params const *params, const uint8_t seed[32]);
void ethash_compute_full_data(void *mem, ethash_params const *params, ethash_cache const *cache);
void ethash_full(ethash_return_value *ret, void const *full_mem, ethash_params const *params, const uint8_t header_hash[32], const uint64_t nonce);
void ethash_light(ethash_return_value *ret, ethash_cache const *cache, ethash_params const *params, const uint8_t header_hash[32], const uint64_t nonce);
static inline int ethash_check_difficulty(
const uint8_t hash[32],
const uint8_t difficulty[32]) {
// Difficulty is big endian
for (int i = 0; i < 32; i++) {
if (hash[i] == difficulty[i]) continue;
return hash[i] < difficulty[i];
}
return 0;
}
int ethash_quick_check_difficulty(
const uint8_t header_hash[32],
const uint64_t nonce,
const uint8_t mix_hash[32],
const uint8_t difficulty[32]);
#ifdef __cplusplus
}
#endif
|
