1
  • platform darwin -- Python 2.7.12, pytest-3.0.2, py-1.4.31, pluggy-0.3.1
  • plugins: populus==2.0.1
  • OS: Mac OS X

I believe I face with this error due to Solidity compiler's default gas limit that is 3,000,000.

[Q] How could I increase my solidity compiler's gas limit due to this error, or another gas limit that populus reads from?

in estimate_gas -> does it exceed gas limit? When I remove some function inside my contract the error gets fixed. I guess there is a gas limit for populus to deploy the contract, is it possible to extend it? If yes how?

Error:

========================================== FAILURES ========================================== ________________________________________ test_receipt ________________________________________ web3 = <web3.main.Web3 object at 0x1061af2d0> accounts = ['0x82A978B3f5962A5b0957d9ee9eEf472EE55B42F1', '0x7d577a597B2742b498Cb5Cf0C26cDCD726d39E6e', '0xDCEceAF3fc5C0a63d195d6...1d7585Bd0577402861E5', '0x13cBB8D99C6C4e0f2728C7d72606e78A29C4E224', '0x77dB2BEBBA79Db42a978F896968f4afCE746ea1F', ...] chain = <populus.chain.tester.TesterChain object at 0x105489b50> def test_receipt(web3, accounts, chain): #{ web3._requestManager = web3.manager global blkArrayIndex; global runTime; > my_contract, _ = chain.provider.get_or_deploy_contract('eBlocBroker'); tests/test.py:39: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ /Library/Python/2.7/site-packages/populus/contracts/provider.py:143: in get_or_deploy_contract deploy_kwargs=deploy_kwargs, /Library/Python/2.7/site-packages/populus/contracts/provider.py:121: in deploy_contract kwargs=deploy_kwargs, /Library/Python/2.7/site-packages/web3/contract.py:311: in deploy txn_hash = cls.web3.eth.sendTransaction(deploy_transaction) /Library/Python/2.7/site-packages/web3/eth.py:216: in sendTransaction get_buffered_gas_estimate(self.web3, transaction), /Library/Python/2.7/site-packages/web3/utils/transactions.py:28: in get_buffered_gas_estimate gas_estimate = web3.eth.estimateGas(gas_estimate_transaction) /Library/Python/2.7/site-packages/web3/eth.py:263: in estimateGas [transaction], /Library/Python/2.7/site-packages/web3/manager.py:93: in request_blocking response = self._make_request(method, params) /Library/Python/2.7/site-packages/web3/manager.py:76: in _make_request return request_func(method, params) /Library/Python/2.7/site-packages/web3/middleware/attrdict.py:20: in middleware response = make_request(method, params) /Library/Python/2.7/site-packages/web3/middleware/formatting.py:23: in middleware response = make_request(method, formatted_params) /Library/Python/2.7/site-packages/web3/middleware/formatting.py:25: in middleware response = make_request(method, params) /Library/Python/2.7/site-packages/web3/middleware/exception_handling.py:20: in middleware return make_request(method, params) /Library/Python/2.7/site-packages/web3/providers/tester.py:86: in middleware return make_request(method, params) /Library/Python/2.7/site-packages/web3/providers/tester.py:115: in make_request response = rpc_fn(*params) /Library/Python/2.7/site-packages/testrpc/rpc.py:138: in eth_estimateGas return self.client.estimate_gas(**formatted_transaction) /Library/Python/2.7/site-packages/testrpc/client/client.py:253: in estimate_gas txn_hash = self.send_transaction(*args, **kwargs) /Library/Python/2.7/site-packages/testrpc/client/client.py:263: in send_transaction self._send_transaction(*args, **kwargs) /Library/Python/2.7/site-packages/testrpc/client/client.py:58: in inner return client_method(self, *args, **kwargs) /Library/Python/2.7/site-packages/testrpc/client/utils.py:104: in inner return fn(*bytes_args, **bytes_kwargs) /Library/Python/2.7/site-packages/testrpc/client/client.py:225: in _send_transaction output = self.evm.send(sender=sender, to=to, value=value, evmdata=data) /Library/Python/2.7/site-packages/ethereum/tester.py:338: in send return self._send(*args, **kwargs)["output"] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <ethereum.tester.state object at 0x1061af590> sender = '\x04HR\xb2\xa6p\xad\xe5@~x\xfb(c\xc5\x1d\xe9\xfc\xb9eB\xa0q\x86\xfe:\xed\xa6\xbb\x8a\x11m' to = '', value = 0 evmdata = "```@R4\x15a\x00\x0fW`\x00\x80\xfd[C`\x00\x81\x90UP3`\x01`\x00a\x01\x00\n\x81T\x81s\xff\xff\xff\xff\xff\xff\xff\xff\xf...c3V[P\x90V[\x90V\x00\xa1ebzzr0X Ks\x04pt'-\x02$\\\xbf\x86\x9c\x0f\xf8\xfa\xbf\x97\xda\xb8/\xd6X\xc8|\xadp\xc6JQpC\x00)" funid = None, abi = None, profiling = 0 def _send(self, sender, to, value, evmdata='', funid=None, abi=None, # pylint: disable=too-many-arguments profiling=0): # pylint: disable=too-many-locals if funid is not None or abi is not None: raise Exception( 'Send with funid+abi is deprecated. Please use the abi_contract mechanism' ) start_time = time.time() gas_used = self.block.gas_used sendnonce = self.block.get_nonce(privtoaddr(sender)) transaction = transactions.Transaction(sendnonce, gas_price, gas_limit, to, value, evmdata) self.last_tx = transaction transaction.sign(sender) recorder = None if profiling > 1: recorder = LogRecorder( disable_other_handlers=True, log_config=TRACE_LVL_MAP[3], ) try: (success, output) = processblock.apply_transaction(self.block, transaction) if not success: > raise TransactionFailed() E TransactionFailed /Library/Python/2.7/site-packages/ethereum/tester.py:296: TransactionFailed ------------------------------------- Captured log call -------------------------------------- rpc.py 129 INFO eth_blockNumber ============================ 1 failed, 4 warnings in 1.41 seconds ============================

Update:

The way I use Populus:

$ mkdir populus_workspace && cd populus_workspace $ [~/populus_workspace] populus init Created Directory: ./contracts Created Example Contract: ./contracts/Greeter.sol Created Directory: ./tests Created Example Tests: ./tests/test_greeter.py $ py.test --capture=fd tests/test_greeter.py -s --disable-pytest-warnings ==================================== test session starts ===================================== platform darwin -- Python 2.7.10, pytest-3.5.0, py-1.5.3, pluggy-0.6.0 rootdir: /Users/alper/mu, inifile: plugins: populus-2.0.1 collected 2 items tests/test_greeter.py .. ============================ 2 passed, 6 warnings in 0.82 seconds ============================

Based on @mafrasi2 answer when I tried:

 my_contract, _ = chain.provider.get_or_deploy_contract('eBlocBroker', deploy_transaction={"gas": 4000001})

I get following error message:

block = <Block(#1 2bb28319)>, tx = <Transaction(751d)> def validate_transaction(block, tx): def rp(what, actual, target): return '%r: %r actual:%r target:%r' % (tx, what, actual, target) # (1) The transaction signature is valid; if not tx.sender: # sender is set and validated on Transaction initialization if block.number >= config.default_config["METROPOLIS_FORK_BLKNUM"]: tx._sender = normalize_address(config.default_config["METROPOLIS_ENTRY_POINT"]) else: raise UnsignedTransaction(tx) if block.number >= config.default_config["HOMESTEAD_FORK_BLKNUM"]: tx.check_low_s() # (2) the transaction nonce is valid (equivalent to the # sender account's current nonce); acctnonce = block.get_nonce(tx.sender) if acctnonce != tx.nonce: raise InvalidNonce(rp('nonce', tx.nonce, acctnonce)) # (3) the gas limit is no smaller than the intrinsic gas, # g0, used by the transaction; if tx.startgas < tx.intrinsic_gas_used: raise InsufficientStartGas(rp('startgas', tx.startgas, tx.intrinsic_gas_used)) # (4) the sender account balance contains at least the # cost, v0, required in up-front payment. total_cost = tx.value + tx.gasprice * tx.startgas if block.get_balance(tx.sender) < total_cost: raise InsufficientBalance(rp('balance', block.get_balance(tx.sender), total_cost)) # check block gas limit if block.gas_used + tx.startgas > block.gas_limit: > raise BlockGasLimitReached(rp('gaslimit', block.gas_used + tx.startgas, block.gas_limit)) E BlockGasLimitReached: <Transaction(751d)>: 'gaslimit' actual:4000001 target:4000000 /Library/Python/2.7/site-packages/ethereum/processblock.py:112: BlockGasLimitReached
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2 Answers 2

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Unfortuately, you can't do this on the command line right now. However, Populus also allows you to use a script to deploy your contract which gives you a ton of customization.

The example in the documentation uses the default gas amount:

txhash = Crowdsale.deploy( transaction={"from": beneficiary}, args=[beneficiary, multisig_address, 1] )

You can simply change this by adding "gas": x to the transaction parameter:

txhash = Crowdsale.deploy( transaction={"from": beneficiary, "gas": 4000000}, args=[beneficiary, multisig_address, 1] )

In general, you can use all the functionality from web3py in Populus. There even is functionality to automatically estimate the amount of gas needed beforehand:

gas_needed = Crowdsale.constructor(beneficiary, multisig_address, 1).estimateGas()

Edit:

I think your problem occurs when you call get_or_deploy_contract()? In that case, you can use:

chain.provider.get_or_deploy_contract('eBlocBroker', deploy_transaction={"gas": 4000000})

Edit 2:

After going through lots of code, I have some new information. Populus uses its tester chain by default. The tester chain represents EthereumTesterProvider from web3py. Now, there are two versions of EthereumTesterProvider: one uses eth-tester and the other uses eth-testrpc. The second one is deprecated, but it's the one that Populus uses. Now, there are two ways to set the block gas limit in eth-testrpc:

  • either, set the environment variable TESTRPC_GAS_LIMIT to something very high like 8000000 before you call py.test ...

  • or, put this snippet into your test_*.py file:

    import pytest @pytest.fixture(scope="session", autouse=True) def adjust_block_gas_limit(): import testrpc.client testrpc.client.client.DEFAULT_GAS_LIMIT = 8000000
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  • I tried your approach I received this error: E BlockGasLimitReached: <Transaction(751d)>: 'gaslimit' actual:4000001 target:4000000 /Library/Python/2.7/site-packages/ethereum/processblock.py:112: BlockGasLimitReached and when I tried for 4000000 it still gives the same initial error. @mafrasi2 Commented May 27, 2018 at 18:33
  • Your block gas limit is too small then. What chain are you using for testing? Commented May 27, 2018 at 21:05
  • Populus uses its own simualtion chain. I dont know how it increaee block gas limit, its linked to solidity compiler’s gas limit. Commented May 27, 2018 at 21:09
  • @alper I'm fairly confident that my new solution will work for you :) Commented May 27, 2018 at 23:27
  • Well yeah, obviously you were supposed to put it outside the test function. I can't hold your hand at each line of code you write.... Commented May 28, 2018 at 11:15
0

Based on @mafrasi2 answer changing the value inside test_*.py file did not help.

By default DEFAULT_GAS_LIMIT is assigned with 4000000.

Please see eth-testrpc/testrpc/client/client.py :

DEFAULT_GAS_LIMIT = t.gas_limit = t.GAS_LIMIT = int(os.environ.get('TESTRPC_GAS_LIMIT', 4000000))

We need to increase DEFAULT_GAS_LIMIT value.

$ pip show eth-testrpc | grep 'Location' Location: /Library/Python/2.7/site-packages $ cd /Library/Python/2.7/site-packages $ grep -r 'TESTRPC_GAS_LIMIT' . ./testrpc/client/client.py:DEFAULT_GAS_LIMIT = t.gas_limit = t.GAS_LIMIT = int(os.environ.get('TESTRPC_GAS_LIMIT', 4000000))

Then open ./testrpc/client/client.py with your editor and update 4000000 with a larger value.

Example test.py: (To run: py.test --capture=fd test.py -s --disable-pytest-warnings)

import pytest def test_receipt(web3, accounts, chain): #{ my_contract, _ = chain.provider.get_or_deploy_contract('myContractName'); ... #}
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  • You can do that. It's really really bad practice though... Commented May 28, 2018 at 11:12
  • Because you are not supposed to just edit installed python packages. What happens when you upgrade the package? What happens when other installed programs expect the original package? I Commented May 28, 2018 at 11:18
  • My second solution definitely works when you do what I said. Did you even try using the first one? Just run export TESTRPC_GAS_LIMIT=8000000 before you run pytest. You can also put this into your ~/.bash_profile to set the environment variable automatically each time you start the terminal. Commented May 28, 2018 at 11:29
  • export TESTRPC_GAS_LIMIT=8000000 works, but second approach didn't not work in my case, it keeps giving: BlockGasLimitReached error. Commented May 28, 2018 at 11:32

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