Module: Ethash

Defined in:
lib/ethash/version.rb,
ext/ethash/ethash.c

Constant Summary collapse

VERSION = 
'0.2.0'
REVISION = 
LONG2NUM((long) ETHASH_REVISION)
DATASET_BYTES_INIT = 
LONG2NUM((long) ETHASH_DATASET_BYTES_INIT)
DATASET_BYTES_GROWTH = 
LONG2NUM((long) ETHASH_DATASET_BYTES_GROWTH)
CACHE_BYTES_INIT = 
LONG2NUM((long) ETHASH_CACHE_BYTES_INIT)
CACHE_BYTES_GROWTH = 
LONG2NUM((long) ETHASH_CACHE_BYTES_GROWTH)
EPOCH_LENGTH = 
LONG2NUM((long) ETHASH_EPOCH_LENGTH)
MIX_BYTES = 
LONG2NUM((long) ETHASH_MIX_BYTES)
HASH_BYTES = 
LONG2NUM((long) ETHASH_HASH_BYTES)
DATASET_PARENTS = 
LONG2NUM((long) ETHASH_DATASET_PARENTS)
CACHE_ROUNDS = 
LONG2NUM((long) ETHASH_CACHE_ROUNDS)
ACCESSES = 
LONG2NUM((long) ETHASH_ACCESSES)

Class Method Summary collapse

Class Method Details

.get_seedhash(blknum) ⇒ Object 



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# File 'ext/ethash/ethash.c', line 52

static VALUE
ethash_get_seedhash_wrapper(VALUE self, VALUE blknum) {
  unsigned long block_number = NUM2ULONG(blknum);

  if (block_number >= ETHASH_EPOCH_LENGTH * 2048) {
    char error_message[1024];
    sprintf(error_message, "Block number must be less than %i (was %lu)", ETHASH_EPOCH_LENGTH*2048, block_number);

    rb_raise(rb_eRuntimeError, error_message);
    return NULL;
  }

  ethash_h256_t seedhash = ethash_get_seedhash(block_number);
  return rb_str_new((char*)&seedhash, 32);
}

.hashimoto_light(blknum, cache, header, _nonce) ⇒ Object 



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# File 'ext/ethash/ethash.c', line 20

static VALUE
ethash_hashimoto_light(VALUE self, VALUE blknum, VALUE cache, VALUE header, VALUE _nonce) {
  char *cache_bytes = RSTRING_PTR(cache);
  unsigned long cache_size = RSTRING_LEN(cache);

  char *header_bytes = RSTRING_PTR(header);
  unsigned long header_size = RSTRING_LEN(header);

  unsigned long block_number = NUM2ULONG(blknum);
  unsigned long nonce = NUM2ULL(_nonce);

  struct ethash_light *s;
  s = calloc(sizeof(*s), 1);
  s->cache = cache_bytes;
  s->cache_size = cache_size;
  s->block_number = block_number;

  struct ethash_h256 *h;
  h = calloc(sizeof(*h), 1);
  for (unsigned int i=0; i<32; i++) h->b[i] = header_bytes[i];

  struct ethash_return_value out = ethash_light_compute(s, *h, nonce);

  VALUE hash = rb_hash_new();
  VALUE key_mixhash = ID2SYM(rb_intern("mixhash"));
  VALUE key_result = ID2SYM(rb_intern("result"));
  rb_hash_aset(hash, key_mixhash, rb_str_new(&out.mix_hash, 32));
  rb_hash_aset(hash, key_result, rb_str_new(&out.result, 32));

  return hash;
}

.mkcache_bytes(blknum) ⇒ Object 



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# File 'ext/ethash/ethash.c', line 9

static VALUE
ethash_mkcache_bytes(VALUE self, VALUE blknum) {
  unsigned long block_number = NUM2ULONG(blknum);

  ethash_light_t L = ethash_light_new(block_number);
  VALUE val = rb_str_new(L->cache, L->cache_size);
  free(L->cache);

  return val;
}