58 lines
1.7 KiB
Python
58 lines
1.7 KiB
Python
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# standard imports
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import sys
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import os
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# external imports
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from crypto_dev_signer.keystore.dict import DictKeystore
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from crypto_dev_signer.eth.signer import ReferenceSigner as EIP155Signer
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from hexathon import (
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add_0x,
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strip_0x,
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)
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# local imports
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from chainlib.chain import ChainSpec
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from chainlib.eth.connection import EthHTTPConnection
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from chainlib.eth.nonce import RPCNonceOracle
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from chainlib.eth.gas import RPCGasOracle
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from chainlib.eth.tx import (
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TxFactory,
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TxFormat,
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)
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from chainlib.error import JSONRPCException
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# eth transactions need an explicit chain parameter as part of their signature
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chain_spec = ChainSpec.from_chain_str('evm:ethereum:1')
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# create keystore and signer
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keystore = DictKeystore()
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signer = EIP155Signer(keystore)
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sender_address = keystore.new()
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recipient_address = keystore.new()
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# set up node connection
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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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# nonce will now be retrieved from network
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nonce_oracle = RPCNonceOracle(sender_address, rpc)
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# gas price retrieved from network, and limit from callback
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def calculate_gas(code=None):
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return 21000
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gas_oracle = RPCGasOracle(rpc, code_callback=calculate_gas)
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# create a new transaction
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tx_factory = TxFactory(chain_spec, signer=signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle)
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tx = tx_factory.template(sender_address, recipient_address, use_nonce=True)
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tx['value'] = 1024
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(tx_hash, tx_rpc) = tx_factory.finalize(tx)
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print('transaction hash: ' + tx_hash)
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print('jsonrpc payload: ' + str(tx_rpc))
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