async_substrate_interface_polkadot_block_hash_and_number_query.py

1import asyncio
2from async_substrate_interface import SubstrateInterface
3
4async def main():
5    # Initialize the SubstrateInterface for a specific websocket URL
6    substrate = SubstrateInterface(
7        url="wss://rpc.polkadot.io"
8    )
9
10    # Retrieve and print the current block hash
11    block_hash = await substrate.get_chain_head()
12    print(f"Current block hash: {block_hash}")
13
14    # Retrieve and print the current block number
15    block_number = await substrate.get_block_number(block_hash)
16    print(f"Current block number: {block_number}")
17
18    # Close the connection
19    await substrate.close()
20
21if __name__ == "__main__":
22    asyncio.run(main())