Sha256 Gpu Miner • Premium Quality

a = hash[0]; b = hash[1]; c = hash[2]; d = hash[3]; e = hash[4]; f = hash[5]; g = hash[6]; h = hash[7];

# Create a dummy block header (80 bytes hex) with version, prev hash, merkle root, time, bits # Bits = 0x1d00ffff -> target ~ 0x00000000ffff000000... # For quick demo, we use a very high target (easy) sha256 gpu miner

def header_to_words(header): """Convert 80-byte header into 16 uint32 words (first 448 bits = 14 words) for kernel""" words = list(unpack("<16I", header.ljust(64, b'\x00'))) return words[:14] # first 14 words (nonce is word 14 in kernel) Main miner ------------------------------ class SHA256GPUMiner: def init (self, device_id=0): platforms = cl.get_platforms() if not platforms: raise RuntimeError("No OpenCL platforms found") a = hash[0]; b = hash[1]; c =

# Use first platform, select GPU device self.platform = platforms[0] self.device = None for dev in self.platform.get_devices(device_type=cl.device_type.GPU): self.device = dev break if not self.device: raise RuntimeError("No GPU device found") self.ctx = cl.Context([self.device]) self.queue = cl.CommandQueue(self.ctx, properties=cl.command_queue_properties.PROFILING_ENABLE) # Build program self.program = cl.Program(self.ctx, KERNEL_CODE).build() print(f"Using GPU: self.device.name") print(f"Max work group size: self.device.max_work_group_size") def mine(self, block_header_hex, target_hex, start_nonce=0, nonce_range=2**24, work_size=None): """ block_header_hex: 80-byte hex string (without nonce, nonce will be zeroed) target_hex: target threshold as hex string (big-endian, e.g., '00000000ffff...') """ # Prepare fixed part (nonce = 0) header = bytes.fromhex(block_header_hex) if len(header) != 80: raise ValueError("Header must be 80 bytes") # Zero out the nonce field (last 4 bytes) to use as fixed base header = header[:76] + b'\x00\x00\x00\x00' fixed_words = header_to_words(header) # Target (first 32 bits big-endian) target_bytes = bytes.fromhex(target_hex) target_high = unpack(">I", target_bytes[:4])[0] # GPU buffers fixed_buf = cl.Buffer(self.ctx, cl.mem_flags.READ_ONLY | cl.mem_flags.COPY_HOST_PTR, hostbuf=np.array(fixed_words, dtype=np.uint32)) results_buf = cl.Buffer(self.ctx, cl.mem_flags.WRITE_ONLY, 3 * 4) # 3 uint32 # Kernel arguments self.program.mine.set_args(fixed_buf, results_buf, np.uint32(start_nonce), np.uint32(target_high)) # Work size if work_size is None: work_size = min(nonce_range, self.device.max_work_group_size * 32) global_size = (work_size,) print(f"Mining from nonce start_nonce to start_nonce + nonce_range - 1") print(f"Target (first 32 bits): 0xtarget_high:08x") print(f"Work size: work_size\n") start_time = time.time() hashes = 0 for offset in range(0, nonce_range, work_size): current_start = start_nonce + offset self.program.mine.set_args(fixed_buf, results_buf, np.uint32(current_start), np.uint32(target_high)) # Execute kernel event = self.program.mine(self.queue, global_size, None) event.wait() # Read results results = np.zeros(3, dtype=np.uint32) cl.enqueue_copy(self.queue, results, results_buf).wait() hashes += work_size if results[0] != 0: # Solution found elapsed = time.time() - start_time speed = hashes / elapsed / 1e6 print(f"\n✅ SOLUTION FOUND after hashes hashes (speed:.2f MH/s)") print(f"Nonce: results[0] (0xresults[0]:08x)") print(f"Hash (first 64 bits): results[1]:08xresults[2]:08x") # Recompute final header final_header = header[:76] + pack("<I", results[0]) final_hash = hashlib.sha256(hashlib.sha256(final_header).digest()).digest() print(f"Full hash (big-endian): final_hash.hex()") return results[0] # Progress report if (offset // work_size) % 256 == 0 and offset > 0: elapsed = time.time() - start_time speed = hashes / elapsed / 1e6 print(f" ... nonce current_start:12d | speed:.2f MH/s") print("\n❌ No solution found in given nonce range") return None Example usage ------------------------------ if name == " main ": # Example: Bitcoin block #0 (genesis) - very easy target # Genesis block header (80 bytes, nonce originally 2083236893) # We'll mine a dummy header with low difficulty a = hash[0]

__constant uint K[64] = 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 ;

for (i = 0; i < 16; i++) W[i] = data[i];

hash[0] += a; hash[1] += b; hash[2] += c; hash[3] += d; hash[4] += e; hash[5] += f; hash[6] += g; hash[7] += h;