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docs/examples.rst

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@@ -202,19 +202,19 @@ Given the following solidity source file stored at ``contract.sol``.
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.. code-block:: javascript
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contract StoreVar {
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uint8 public _myVar;
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event MyEvent(uint indexed _var);
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function setVar(uint8 _var) public {
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_myVar = _var;
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MyEvent(_var);
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}
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function getVar() public view returns (uint8) {
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return _myVar;
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}
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}
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The following example demonstrates a few things:
@@ -229,45 +229,45 @@ The following example demonstrates a few things:
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import sys
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import time
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import pprint
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from web3.providers.eth_tester import EthereumTesterProvider
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from web3 import Web3
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from solc import compile_source
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def compile_source_file(file_path):
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with open(file_path, 'r') as f:
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source = f.read()
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return compile_source(source)
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def deploy_contract(w3, contract_interface):
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tx_hash = w3.eth.contract(
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abi=contract_interface['abi'],
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bytecode=contract_interface['bin']).deploy()
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address = w3.eth.getTransactionReceipt(tx_hash)['contractAddress']
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return address
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w3 = Web3(EthereumTesterProvider())
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contract_source_path = 'contract.sol'
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compiled_sol = compile_source_file('contract.sol')
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contract_id, contract_interface = compiled_sol.popitem()
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address = deploy_contract(w3, contract_interface)
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print("Deployed {0} to: {1}\n".format(contract_id, address))
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store_var_contract = w3.eth.contract(
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address=address,
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abi=contract_interface['abi'])
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gas_estimate = store_var_contract.functions.setVar(255).estimateGas()
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print("Gas estimate to transact with setVar: {0}\n".format(gas_estimate))
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if gas_estimate < 100000:
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print("Sending transaction to setVar(255)\n")
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tx_hash = store_var_contract.functions.setVar(255).transact()

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