Created
April 2, 2021 06:54
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Print the coinbase data for all ancestors of a block, up to a specified block height
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| import json | |
| import subprocess | |
| tip = "00000000000000002b3ca56c3fdef9a74b8758bc7da5d9c9aecd79ed922a3692" | |
| FORK_HEIGHT = 679555 | |
| def print_chain(tip_hash: str, min_height: int = FORK_HEIGHT): | |
| """Print block information starting at a given chain tip and going | |
| backward up to (and including) the block with height min_height""" | |
| block = json.loads(subprocess.check_output( | |
| ['bitcoin-cli', 'getblock', tip_hash])) | |
| height = block["height"] | |
| if height < min_height: | |
| return | |
| coinbase_id = block["tx"][0] | |
| print(f"Block height {height}; hash {tip_hash}; coinbase tx {coinbase_id}") | |
| tx = json.loads(subprocess.check_output( | |
| ['bitcoin-cli', 'getrawtransaction', coinbase_id, "true", tip_hash])) | |
| coinbase_data = bytes.fromhex(tx["vin"][0]["coinbase"]) | |
| print(coinbase_data) | |
| assert b"ZULUPooL-" in coinbase_data | |
| parent_hash = block["previousblockhash"] | |
| print_chain(parent_hash, min_height) | |
| if __name__ == '__main__': | |
| print_chain(tip, FORK_HEIGHT) |
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