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91 lines
2.6 KiB
91 lines
2.6 KiB
/*
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This file is part of ethash.
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ethash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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ethash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with ethash. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file ethash.h
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* @date 2015
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*/
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#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stddef.h>
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#include "compiler.h"
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#define ETHASH_REVISION 23
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#define ETHASH_DATASET_BYTES_INIT 1073741824U // 2**30
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#define ETHASH_DATASET_BYTES_GROWTH 8388608U // 2**23
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#define ETHASH_CACHE_BYTES_INIT 1073741824U // 2**24
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#define ETHASH_CACHE_BYTES_GROWTH 131072U // 2**17
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#define ETHASH_EPOCH_LENGTH 30000U
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#define ETHASH_MIX_BYTES 128
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#define ETHASH_HASH_BYTES 64
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#define ETHASH_DATASET_PARENTS 256
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#define ETHASH_CACHE_ROUNDS 3
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#define ETHASH_ACCESSES 64
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#ifdef __cplusplus
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extern "C" {
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#endif
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/// Type of a seedhash/blockhash e.t.c.
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typedef struct ethash_h256 { uint8_t b[32]; } ethash_h256_t;
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struct ethash_light;
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typedef struct ethash_light* ethash_light_t;
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typedef struct ethash_return_value {
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ethash_h256_t result;
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ethash_h256_t mix_hash;
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bool success;
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} ethash_return_value_t;
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/**
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* Allocate and initialize a new ethash_light handler
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*
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* @param block_number The block number for which to create the handler
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* @return Newly allocated ethash_light handler or NULL in case of
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* ERRNOMEM or invalid parameters used for @ref ethash_compute_cache_nodes()
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*/
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ethash_light_t ethash_light_new(uint64_t block_number);
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/**
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* Frees a previously allocated ethash_light handler
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* @param light The light handler to free
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*/
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void ethash_light_delete(ethash_light_t light);
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/**
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* Calculate the light client data
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*
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* @param light The light client handler
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* @param header_hash The header hash to pack into the mix
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* @param nonce The nonce to pack into the mix
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* @return an object of ethash_return_value_t holding the return values
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*/
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ethash_return_value_t ethash_light_compute(
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ethash_light_t light,
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ethash_h256_t const header_hash,
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uint64_t nonce
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);
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/**
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* Calculate the seedhash for a given block number
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*/
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ethash_h256_t ethash_get_seedhash(uint64_t block_number);
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#ifdef __cplusplus
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}
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#endif
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