int ethash_quick_check_difficulty(ethash_h256_t const *header_hash,
const uint64_t nonce,
ethash_h256_t const *mix_hash,
ethash_h256_t const *difficulty)
{
ethash_h256_t return_hash;
ethash_quick_hash(&return_hash, header_hash, nonce, mix_hash);
return ethash_check_difficulty(&return_hash, difficulty);
}
bool ethash_quick_check_difficulty(
ethash_h256_t const* header_hash,
uint64_t const nonce,
ethash_h256_t const* mix_hash,
ethash_h256_t const* boundary
)
{
ethash_h256_t return_hash;
ethash_quick_hash(&return_hash, header_hash, nonce, mix_hash);
return ethash_check_difficulty(&return_hash, boundary);
}
// mine(dataset_bytes, header, difficulty_bytes)
static PyObject *
mine(PyObject *self, PyObject *args) {
char *full_bytes, *header, *difficulty;
srand(time(0));
uint64_t nonce = ((uint64_t) rand()) << 32 | rand();
int full_size, header_size, difficulty_size;
if (!PyArg_ParseTuple(args, PY_STRING_FORMAT PY_STRING_FORMAT PY_STRING_FORMAT, &full_bytes, &full_size, &header, &header_size, &difficulty, &difficulty_size))
return 0;
if (full_size % MIX_WORDS != 0) {
char error_message[1024];
sprintf(error_message, "The size of data set must be a multiple of %i bytes (was %i)", MIX_WORDS, full_size);
PyErr_SetString(PyExc_ValueError, error_message);
return 0;
}
if (header_size != 32) {
char error_message[1024];
sprintf(error_message, "Header must be 32 bytes long (was %i)", header_size);
PyErr_SetString(PyExc_ValueError, error_message);
return 0;
}
if (difficulty_size != 32) {
char error_message[1024];
sprintf(error_message, "Difficulty must be an array of 32 bytes (only had %i)", difficulty_size);
PyErr_SetString(PyExc_ValueError, error_message);
return 0;
}
ethash_return_value out;
ethash_params params;
params.full_size = (size_t) full_size;
// TODO: Multi threading?
do {
ethash_full(&out, (void *) full_bytes, ¶ms, (const uint8_t *) header, nonce++);
// TODO: disagrees with the spec https://github.com/ethereum/wiki/wiki/Ethash#mining
} while (!ethash_check_difficulty(out.result, (const uint8_t *) difficulty));
return Py_BuildValue("{" PY_CONST_STRING_FORMAT ":" PY_STRING_FORMAT ", " PY_CONST_STRING_FORMAT ":" PY_STRING_FORMAT ", " PY_CONST_STRING_FORMAT ":K}",
"mix digest", out.mix_hash, 32,
"result", out.result, 32,
"nonce", nonce);
}
