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Diffstat (limited to 'Godeps/_workspace/src/github.com/ethereum/ethash/libethash/ethash.h')
-rw-r--r-- | Godeps/_workspace/src/github.com/ethereum/ethash/libethash/ethash.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/github.com/ethereum/ethash/libethash/ethash.h b/Godeps/_workspace/src/github.com/ethereum/ethash/libethash/ethash.h new file mode 100644 index 000000000..62edd0082 --- /dev/null +++ b/Godeps/_workspace/src/github.com/ethereum/ethash/libethash/ethash.h @@ -0,0 +1,88 @@ +/* + 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 |