30 lines
697 B
Python
30 lines
697 B
Python
# standard imports
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import os
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import sys
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# local imports
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from chainlib.jsonrpc import jsonrpc_template
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from chainlib.eth.connection import EthHTTPConnection
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# set up node connection and execute rpc call
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rpc_provider = os.environ.get('RPC_PROVIDER', 'http://localhost:8545')
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rpc = EthHTTPConnection(rpc_provider)
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# check the connection
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if not rpc.check():
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sys.stderr.write('node {} not usable\n'.format(rpc_provider))
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sys.exit(1)
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# build and send rpc call
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o = jsonrpc_template()
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o['method'] = 'eth_blockNumber'
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r = rpc.do(o)
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# interpret result for humans
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try:
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block_number = int(r, 10)
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except ValueError:
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block_number = int(r, 16)
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print('block number {}'.format(block_number))
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