// Copy fixed block words (0..13) and add nonce at word 14 uint data[16]; for (int i = 0; i < 14; i++) data[i] = fixed_block[i];
a = hash[0]; b = hash[1]; c = hash[2]; d = hash[3]; e = hash[4]; f = hash[5]; g = hash[6]; h = hash[7]; sha256 gpu miner
// Second block for length padding (only length=512 bits = 0x200 bits) uint data2[16] = 0; data2[0] = 0x00000080; // padding block data2[15] = 0x00000200; // bit length (512 bits) // Copy fixed block words (0
// Check if solution (big-endian compare with target) // We just check first 32 bits (hash2[0] byteswapped to big-endian) uint be_hash0 = ((hash2[0] >> 24) & 0xFF) """ Helper: prepare block header (Bitcoin-style, 80 bytes) ------------------------------ def make_block_header(version, prev_hash, merkle_root, timestamp, bits, nonce=0): """Pack 80-byte Bitcoin block header (little-endian for each field except nonce)""" header = (pack("<I", version) + pack("<32s", bytes.fromhex(prev_hash)[::-1]) + pack("<32s", bytes.fromhex(merkle_root)[::-1]) + pack("<I", timestamp) + pack("<I", bits) + pack("<I", nonce)) return header for (int i = 0