A python interface for interacting with the Ethereum blockchain and ecosystem.
Home Page: http://web3py.readthedocs.io
License: MIT License
A Python library for interacting with Ethereum.
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Currently tests run against both an RPC and IPC connection to a real geth node. This is useful in that it will surface any discrepancies, but it's slow and overly redundant.
To fix this, I propose a new provider type, MultiProvider.
MultiProvider is composed of multiple other providers.This will be useful for testing in that it will allow the test suite to be faster.
This should also be useful in other situations as it will allow for things like load balancing, or redundancy across multiple providers.
My strings passed in contract events get corrupted. They look like this when I listen to events:
'_ipfsaddr': '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'`
--- events.py 2016-12-07 14:21:27.523182611 +0100
+++ events-new.py 2016-12-07 14:18:24.779178254 +0100
@@ -116,8 +116,8 @@
entries using the correct types.
"""
return [
- 'bytes32' if arg_type in {'bytes', 'string'} else arg_type
- for arg_type in input_types
+ #'bytes32' if arg_type in {'bytes', 'string'} else arg_type
+ arg_type for arg_type in input_types
]
now I get my ipfs address correctly:
'_ipfsaddr': 'QmSL2Zj3QmQFNcF6pethSYDF8fGYpz1LDeFiaLSzkCtAQ2'
On a clean installation, import web3 fails, with import errors due to imports of gevent and rlp.
Should these be added to install_requires?
Currently web3.contract._Contract is privateish It would be useful to expose this for static analysis to help IDE auto completion.
I'd suggest renaming _Contract to Contract or ContractBase and then exposing it in necessary __init__ modules.
i install and new laptop and I fail here, I haent the slightest idea where to look at from the error log
the test hangs ans never returns
/usr/local/lib/python3.5/dist-packages/gevent-1.1.2-py3.5-linux-x86_64.egg/gevent/monkey.py:395: RuntimeWarning: Monkey-patching not on the main thread; threading.main_thread().join() will hang from a greenlet
_warnings)
E
request = <SubRequest 'web3' for <Function 'test_needs_skipping[tester]'>>
@pytest.yield_fixture(params=[
'tester',
pytest.mark.slow('rpc'),
pytest.mark.slow('ipc'),
])
def web3(request):
from web3 import Web3
if request.param == "tester":
setup_fn = setup_tester_rpc_provider
elif request.param == "rpc":
setup_fn = setup_rpc_provider
elif request.param == "ipc":
setup_fn = setup_ipc_provider
else:
raise ValueError("Unknown param")
> with setup_fn() as provider:
PycharmProjects/web3.py/conftest.py:171:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/lib/python3.5/contextlib.py:59: in __enter__
return next(self.gen)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
@contextlib.contextmanager
def setup_tester_rpc_provider():
> from testrpc import testrpc
E RuntimeError: cannot release un-acquired lock
PycharmProjects/web3.py/conftest.py:99: RuntimeError
Just a note that there is documentation to write.
Potentially time to go ahead and create sphinx docs and have a real readthedocs site instead of just a README.md document.
The following cleanup would help the library in small ways.
The term Contract is not entirely correct. I have been using the term ContractFactory elsewhere and I like it more. Ideally we step through the codebase and replace all names so that they match this moniker.
The actual ContractFactory instances returned by web3.eth.contract are all classes of the same name. I propose changing the function signature to allow one extra optional keyword name. When provided, the class returned from this method would be named with the provided name rather than the boring 'Contract' name that they all currently hold.
put a cute animal picture here.
On most commands this comes out of standard out when the interpreter exits.
Exception ignored in: <bound method state.__del__ of <ethereum.tester.state object at 0x11350ca20>>
Traceback (most recent call last):
File "/Users/piper/python-environments/web3.py/lib/python3.5/site-packages/ethereum/tester.py", line 187, in __del__
AttributeError: 'NoneType' object has no attribute 'rmtree'This is a race condition that occurs when the interpreter is shutting down. The upstream library eth-testrpc needs to be patched so that it doesn't create the instance of the tester client on module import but rather on demand somehow.
For solidity code:
contract A {
mapping (address => bytes32[]) public somename;
}
solc will generate function with ABI:
{
"constant": True,
"inputs": [
{
"name": "",
"type": "address"
},
{
"name": "",
"type": "uint256"
}
],
"name": "somename",
"outputs": [
{
"name": "",
"type": "bytes32",
"value": "0x"
}
],
"payable": False,
"type": "function"
},
Notice that both name keys of inputs are empty.
The code in https://github.com/pipermerriam/web3.py/blob/master/web3/utils/abi.py#L162
Will squash two arguments pased to Contract.call().somename(addr, index) into one argument because it uses name as unique identifier.
(Note, above examples are edited from my code so I haven't actually compile this exact code to reproduce the issue)
I have 3k+ database records to write to a smart contract. Unfortunately, after writing a few records, I'm getting intermittent timeout problems. Here's a traceback of one such occasion:
Traceback (most recent call last):
File "dataReader.py", line 306, in <module>
main()
File "dataReader.py", line 303, in main
blockchain_writer.writeRecords()
File "dataReader.py", line 242, in writeRecords
self.__setCulturalHeritageRecord(coId, record[self.cultural_heritage_keys[CulturalHeritageIndexList.AccessionNumber]])
File "dataReader.py", line 186, in __setCulturalHeritageRecord
self.contract.transact().createCulturalHeritageRecord(coId, accessionNumber)
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/web3/contract.py", line 815, in transact_with_contract_function
txn_hash = contract.web3.eth.sendTransaction(transact_transaction)
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/web3/utils/string.py", line 86, in inner
return force_obj_to_text(fn(*args, **kwargs))
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/web3/eth.py", line 252, in sendTransaction
transaction=formatted_transaction,
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/web3/utils/transactions.py", line 53, in get_buffered_gas_estimate
gas_estimate = web3.eth.estimateGas(gas_estimate_transaction)
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/web3/utils/functional.py", line 22, in inner
value = fn(*args, **kwargs)
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/web3/eth.py", line 295, in estimateGas
[formatted_transaction],
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/web3/providers/manager.py", line 42, in request_blocking
response_raw = self.provider.make_request(method, params)
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/web3/providers/rpc.py", line 49, in make_request
**self.get_request_kwargs()
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/web3/utils/compat/compat_requests.py", line 21, in make_post_request
response = session.post(endpoint_uri, data=data, *args, **kwargs)
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/requests/sessions.py", line 535, in post
return self.request('POST', url, data=data, json=json, **kwargs)
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/requests/sessions.py", line 488, in request
resp = self.send(prep, **send_kwargs)
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/requests/sessions.py", line 609, in send
r = adapter.send(request, **kwargs)
File "/home/s/sh/sh601/.local/lib/python2.7/site-packages/requests/adapters.py", line 499, in send
raise ReadTimeout(e, request=request)
requests.exceptions.ReadTimeout: HTTPConnectionPool(host='localhost', port=8545): Read timed out. (read timeout=10)
...geth was busy mining a potential block at that point. Any ideas how I might overcome that? I'd rather block and wait (or something) rather than just fail....
this Line in the docs is wrong.
It currently is:
>>> def new_block_callback(block_hash):
... sys.stdout.write("New Block: {0}".format(block_hash))
...
>>> new_block_filter = web3.eth.filter('latest')
>>> new_block_filter.watch(new_block_filter)It should be
>>> def new_block_callback(block_hash):
... sys.stdout.write("New Block: {0}".format(block_hash))
...
>>> new_block_filter = web3.eth.filter('latest')
>>> new_block_filter.watch(new_block_callback)It would be nice to have Manager class which would translate any call to eth_sendTransaction to one of eth_sendRawTransaction or personal_sendTransaction. This would allow running against locked nodes and still being able to send transactions without modifying application code.
Probably with a new (RequestManager](https://github.com/pipermerriam/web3.py/blob/master/web3/providers/manager.py#L8) class which would inspect the requests coming in and translate them to the proper requests.
Something like the following.
class SendRawTransactionMixin(object):
def request_blocking(self, method, params):
if method == 'eth_sendTransaction':
# create a fully signed transaction and send through the
# `eth_sendRawTransaction` endpoint instead.
... 
I'm trying to send a transaction from an account to Ropsten another but I got error socket timeout
Traceback (most recent call last):
File "rpc-client.py", line 11, in <module>
print web3rpc.eth.sendTransaction({'to': john, 'from': web3rpc.eth.coinbase, 'value': 12345})
File "/usr/local/lib/python2.7/dist-packages/web3/eth.py", line 243, in sendTransaction
[formatters.input_transaction_formatter(self, formatted_transaction)],
File "/usr/local/lib/python2.7/dist-packages/web3/providers/manager.py", line 37, in request_blocking
response_raw = self.provider.make_request(method, params)
File "/usr/local/lib/python2.7/dist-packages/web3/providers/rpc.py", line 161, in make_request
response = self.client.post(self.path, body=request_data)
File "/usr/local/lib/python2.7/dist-packages/geventhttpclient/client.py", line 218, in post
return self.request(METHOD_POST, request_uri, body=body, headers=headers)
File "/usr/local/lib/python2.7/dist-packages/geventhttpclient/client.py", line 200, in request
block_size=self.block_size, method=method.upper(), headers_type=self.headers_type)
File "/usr/local/lib/python2.7/dist-packages/geventhttpclient/response.py", line 298, in __init__
super(HTTPSocketPoolResponse, self).__init__(sock, **kw)
File "/usr/local/lib/python2.7/dist-packages/geventhttpclient/response.py", line 170, in __init__
self._read_headers()
File "/usr/local/lib/python2.7/dist-packages/geventhttpclient/response.py", line 190, in _read_headers
data = self._sock.recv(self.block_size)
File "/usr/local/lib/python2.7/dist-packages/gevent/_socket2.py", line 280, in recv
self._wait(self._read_event)
File "/usr/local/lib/python2.7/dist-packages/gevent/_socket2.py", line 179, in _wait
self.hub.wait(watcher)
File "/usr/local/lib/python2.7/dist-packages/gevent/hub.py", line 630, in wait
result = waiter.get()
File "/usr/local/lib/python2.7/dist-packages/gevent/hub.py", line 878, in get
return self.hub.switch()
File "/usr/local/lib/python2.7/dist-packages/gevent/hub.py", line 609, in switch
return greenlet.switch(self)
socket.timeout: timed out
Here is my python script (I'm connected to my server, assuming my remove server IP is : 128.49.52.154) :
from web3 import Web3, KeepAliveRPCProvider
web3rpc = Web3(KeepAliveRPCProvider())
web3rpc = Web3(KeepAliveRPCProvider(host="128.49.52.154", port="8545"))
john = '0xe7bcd3b454c18313fe88d679eaf41251a58793dd'
print web3rpc.eth.sendTransaction({'to': john, 'from': web3rpc.eth.coinbase, 'value': 12345})
I thought it was because I'm using the Ropsten testnet and I have to use TestRPCProvider instead of KeepAliveRPCProvider.
But when I'm using TestRPCProvider I have this error :
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/gevent/greenlet.py", line 534, in run
result = self._run(*self.args, **self.kwargs)
File "/usr/local/lib/python2.7/dist-packages/gevent/baseserver.py", line 347, in serve_forever
self.start()
File "/usr/local/lib/python2.7/dist-packages/gevent/baseserver.py", line 291, in start
self.init_socket()
File "/usr/local/lib/python2.7/dist-packages/gevent/pywsgi.py", line 1222, in init_socket
StreamServer.init_socket(self)
File "/usr/local/lib/python2.7/dist-packages/gevent/server.py", line 80, in init_socket
self.socket = self.get_listener(self.address, self.backlog, self.family)
File "/usr/local/lib/python2.7/dist-packages/gevent/server.py", line 91, in get_listener
return _tcp_listener(address, backlog=backlog, reuse_addr=self.reuse_addr, family=family)
File "/usr/local/lib/python2.7/dist-packages/gevent/server.py", line 177, in _tcp_listener
sock.bind(address)
File "<string>", line 1, in bind
TypeError: an integer is required
<Greenlet at 0x7f43a554d550: <bound method WSGIServer.serve_forever of <WSGIServer at 0x7f43a5526a50 address=128.49.52.154>>> failed with TypeError
Exception AttributeError: "'NoneType' object has no attribute 'rmtree'" in <bound method state.__del__ of <ethereum.tester.state object at 0x7f43a5543650>> ignored
With this code :
from web3 import Web3, TestRPCProvider
web3rpc = Web3(TestRPCProvider())
web3rpc = Web3(TestRPCProvider(host="128.49.52.154", port="8545"))
print web3rpc.eth.coinbase
Anyone know how can I fix my socket error or TestRPCProvider error ? Or Maybe the socket timeout error is caused by the connection to my remote server ? The connection must be in localhost ?
https://blog.ethereum.org/2016/07/08/c-dev-update-summer-edition/
Implement support for this.
I am trying to create an account and list out the accounts. But i got "socket.timeout: timed out"
My Log is:
Traceback (most recent call last):
File "/home/insipc208/Desktop/Eth/Example/create_account.py", line 10, in
web3rpc.personal.newAccount('insoftindia')
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/web3/utils/string.py", line 83, in inner
return force_obj_to_text(fn(*args, **kwargs))
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/web3/personal.py", line 49, in newAccount
"personal_newAccount", [password],
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/web3/providers/manager.py", line 41, in request_blocking
response_raw = self.provider.make_request(method, params)
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/web3/providers/rpc.py", line 160, in make_request
response = self.client.post(self.path, body=request_data)
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/geventhttpclient/client.py", line 218, in post
return self.request(METHOD_POST, request_uri, body=body, headers=headers)
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/geventhttpclient/client.py", line 200, in request
block_size=self.block_size, method=method.upper(), headers_type=self.headers_type)
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/geventhttpclient/response.py", line 298, in init
super(HTTPSocketPoolResponse, self).init(sock, **kw)
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/geventhttpclient/response.py", line 170, in init
self._read_headers()
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/geventhttpclient/response.py", line 190, in _read_headers
data = self._sock.recv(self.block_size)
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/gevent/_socket2.py", line 280, in recv
self._wait(self._read_event)
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/gevent/_socket2.py", line 179, in _wait
self.hub.wait(watcher)
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/gevent/hub.py", line 630, in wait
result = waiter.get()
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/gevent/hub.py", line 878, in get
return self.hub.switch()
File "/opt/ethereum/pyethapp/.venv/local/lib/python2.7/site-packages/gevent/hub.py", line 609, in switch
return greenlet.switch(self)
socket.timeout: timed out
My Code:
from web3 import Web3, KeepAliveRPCProvider, IPCProvider
web3rpc = Web3(KeepAliveRPCProvider(host='localhost', port='8545'))
print dir(web3rpc.personal.web3.eth)
web3rpc.personal.newAccount('insoftindia')
print web3rpc.eth.accounts
Using testnet:
pyethapp --profile morden --data-dir '/home/insipc208/Desktop/Eth/pyethapp_data/state' -c jsonrpc.listen_port=8545 run
Could please suggest to solve this?
I have a running node launched with geth, no params
In[3]: from web3 import Web3, IPCProvider
In[4]: web3 = Web3(IPCProvider())
In[5]: web3.eth.coinbase
Traceback (most recent call last):
File "/usr/local/lib/python3.5/dist-packages/IPython/core/interactiveshell.py", line 2885, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-5-951bbb3a23b6>", line 1, in <module>
web3.eth.coinbase
File "/usr/local/lib/python3.5/dist-packages/web3-2.7.1-py3.5.egg/web3/eth.py", line 70, in coinbase
return self.request_manager.request_blocking("eth_coinbase", [])
File "/usr/local/lib/python3.5/dist-packages/web3-2.7.1-py3.5.egg/web3/providers/manager.py", line 20, in request_blocking
response_raw = self.provider.make_request(method, params)
File "/usr/local/lib/python3.5/dist-packages/web3-2.7.1-py3.5.egg/web3/providers/ipc.py", line 86, in make_request
with get_ipc_socket(self.ipc_path) as sock:
File "/usr/lib/python3.5/contextlib.py", line 59, in __enter__
return next(self.gen)
File "/usr/local/lib/python3.5/dist-packages/web3-2.7.1-py3.5.egg/web3/providers/ipc.py", line 27, in get_ipc_socket
sock.connect(ipc_path)
File "/usr/local/lib/python3.5/dist-packages/gevent/_socket3.py", line 294, in connect
raise error(result, strerror(result))
FileNotFoundError: [Errno 2] No such file or directory
In[6]: web3.currentProvider.ipc_path
Out[6]: '/home/user/ethereum/geth.ipc'
debugging the stuff makes me think that in this part in https://github.com/pipermerriam/web3.py/blob/master/web3/providers/ipc.py#L49-L55 there should be a .ethereum instead of ethereum, or I'm smoking and don't use it correctly ?
elif sys.platform.startswith('linux'):
return os.path.expanduser(os.path.join(
"~",
"ethereum",
testnet,
"geth.ipc",
))
on my computer the geth.ipc is there : '/home/user/.ethereum/geth.ipc'
I'm following the tutorial given in the web3.py documentation page for filtering new blocks.
The callback function that I register with the newly created filter is not getting called on receipt of new block.However,If I query the filter chages using 'getFilterChanges' method, I can see the new blocks.
Code (Running in the interpreter):
import sys
from web3 import Web3,RPCProvider
web3 = Web3(RPCProvider(host="eth3.augur.net",port="8545"))
def new_block_callback(block_hash):
sys.stdout.write("New Block: {0}".format(block_hash))
new_block_filter = web3.eth.filter("latest")
new_block_filter.watch(new_block_callback)
new_block_filter.filter_id #Prints 0x219eb3a71c4b3c4074e883e708928d55
new_block_filter.running #Prints nothing,not even false
new_block_filter.stopped #Prints false
#No prints even after few block generation
web3.eth.getFilterChanges('0x219eb3a71c4b3c4074e883e708928d55') #Prints list of all newly generated blockI was using web3.py within Hive, basically it's run within a docker container and performs various queries against a client.
In one of the tests, I'm verifying a lot of conditions, ~30K. After 28232 requests, the lib failed with the following exception : requests.packages.urllib3.connection.HTTPConnection object at 0x7f4b0a86a750\u003e: Failed to establish a new connection: [Errno 99] Address not available
@karalabe pointed out that 28232 == 61000- 32768. That is; I was exhausing all the TCP ports linux lets me use for outbound connections.
According to requests docs: http://docs.python-requests.org/en/master/user/advanced/#keep-alive:
Excellent news — thanks to urllib3, keep-alive is 100% automatic within a session! Any requests that you make within a session will automatically reuse the appropriate connection!
However, the library does not use a session:
https://github.com/pipermerriam/web3.py/blob/master/web3/utils/compat/compat_requests.py#L6
def make_post_request(endpoint_uri, data, *args, **kwargs):
kwargs.setdefault('timeout', 10)
response = requests.post(endpoint_uri, data=data, *args, **kwargs)In my case, I only really need a couple of the methods, and it was simple enough to implement these myself using a requests, skipping web3.py altogethere. But it may be an idea to add support for this kind of usecase anyway, since connection reuse also adds a bit of speed, and the library is likely to use the same endpoint over and over again.
With my session-based thingy, the problem went away.
He's a bit disappointed right now
running tox pass the tests fine
but running them individually yields this error on some
I guess it's my local install since tox is fime, but couldnt find the root of it
➜ web3.py git:(master) ✗ sudo pip3 uninstall pysha3
Uninstalling pysha3-0.3:
/usr/local/lib/python3.5/dist-packages/pysha3-0.3-py3.5-linux-x86_64.egg
pysha3 0.3 is install, seems to be the right version
─
➜ web3.py git:(master) ✗ py.test-3 tests/filtering/test_contract_on_event_filtering.py
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 283, in _getconftestmodules
return self._path2confmods[path]
KeyError: local('/home/lotsos/PycharmProjects/web3.py/tests/filtering/test_contract_on_event_filtering.py')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 283, in _getconftestmodules
return self._path2confmods[path]
KeyError: local('/home/lotsos/PycharmProjects/web3.py/tests/filtering')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 314, in _importconftest
return self._conftestpath2mod[conftestpath]
KeyError: local('/home/lotsos/PycharmProjects/web3.py/tests/filtering/conftest.py')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 320, in _importconftest
mod = conftestpath.pyimport()
File "/usr/local/lib/python3.5/dist-packages/py/_path/local.py", line 650, in pyimport
__import__(modname)
File "/home/lotsos/PycharmProjects/web3.py/tests/filtering/conftest.py", line 6, in <module>
assert sha3_256(b'').hexdigest() == 'c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470'
File "/usr/local/lib/python3.5/dist-packages/sha3/__init__.py", line 97, in sha3_256
return SHA3256(s)
File "/usr/local/lib/python3.5/dist-packages/sha3/__init__.py", line 30, in __init__
self._s = _sha3.sha3()
AttributeError: module '_sha3' has no attribute 'sha3'
ERROR: could not load /home/lotsos/PycharmProjects/web3.py/tests/filtering/conftest.py
put a cute animal picture here.
I'm trying to create an account and send funds to it from the coinbase I got this error
DEBUG:requests.packages.urllib3.connectionpool:"POST / HTTP/1.1" 200 80
E
web3 = <web3.main.Web3 object at 0x7fc57de45d30>
request = <SubRequest 'account' for <Function 'test_buyAsset[rpc-0-param1]'>>
wait_for_transaction = <function wait_for_transaction.<locals>._wait_for_transaction at 0x7fc57e6a7d08>
@pytest.fixture(params=[0])
def account(web3, request, wait_for_transaction):
if (len(web3.personal.listAccounts))< 2:
log.debug('web3: {} {}'.format(web3, web3.personal.listAccounts))
new_account = create_account(web3, password='test')
log_who_got_what(web3)
> tx = web3.eth.sendTransaction({"from": web3.eth.coinbase, "to": new_account, "value": to_wei(100, 'ether')})
PycharmProjects/ddn/tests/test_dudes.py:43:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/local/lib/python3.5/dist-packages/web3-1.6.0-py3.5.egg/web3/eth.py:208: in sendTransaction
[formatted_transaction],
/usr/local/lib/python3.5/dist-packages/web3-1.6.0-py3.5.egg/web3/providers/manager.py:20: in request_blocking
response_raw = self.provider.make_request(method, params)
/usr/local/lib/python3.5/dist-packages/web3-1.6.0-py3.5.egg/web3/providers/rpc.py:17: in make_request
request = self.encode_rpc_request(method, params)
/usr/local/lib/python3.5/dist-packages/web3-1.6.0-py3.5.egg/web3/providers/base.py:24: in encode_rpc_request
"id": next(self.request_counter),
/usr/lib/python3.5/json/__init__.py:230: in dumps
return _default_encoder.encode(obj)
/usr/lib/python3.5/json/encoder.py:198: in encode
chunks = self.iterencode(o, _one_shot=True)
/usr/lib/python3.5/json/encoder.py:256: in iterencode
return _iterencode(o, 0)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <json.encoder.JSONEncoder object at 0x7fc5833e9f98>
o = Decimal('100000000000000000000')
def default(self, o):
"""Implement this method in a subclass such that it returns
a serializable object for ``o``, or calls the base implementation
(to raise a ``TypeError``).
For example, to support arbitrary iterators, you could
implement default like this::
def default(self, o):
try:
iterable = iter(o)
except TypeError:
pass
else:
return list(iterable)
# Let the base class default method raise the TypeError
return JSONEncoder.default(self, o)
"""
> raise TypeError(repr(o) + " is not JSON serializable")
E TypeError: Decimal('100000000000000000000') is not JSON serializable
/usr/lib/python3.5/json/encoder.py:179: TypeError
This code does not throw any errors or warnings.
abi = [...] # the contract ABI
code = "0x..." # the contract code
web3.eth.contract(abi, code)The above code is actually passing in the code as the address parameter since the function signature of web3.eth.contract is def contract(self, abi, address=None, **kwargs):.
Validating the address is well formed (and potentially normalizing it) is trivial to do and would keep this subtle error from happening.
I used this code to deploy new contracts
abi_json = json.loads(abi)
ContractFactory = web3rpc.eth.contract(abi_json, code=bytesource)
txhash = ContractFactory.deploy()
It used to work for a while till around 2 weeks ago it just deploys empty contracts. I've tried changing everything on my ABI and bytecode (e.g adding 0x in from of the bytecode) but nothing seems to fix it. Any ideas why this might happen? any incompatibility with new geth update?
Currently web3.py does not encode string types in functions. This e.g. prevents creating standard token contracts as the constructor fails.
_type = b'string', value = b'Mootoken'
ValueError: Unsupported type
Assume implicit UTF-8 encoding.
Update Math test contract in contracts/conftest.py or add new test contract to contain some string set functions.
contract Math {
uint public counter;
string public name;
event Increased(uint value);
function increment() public returns (uint) {
return increment(1);
}
function increment(uint amt) public returns (uint result) {
counter += amt;
result = counter;
Increased(result);
return result;
}
function add(int a, int b) public returns (int result) {
result = a + b;
return result;
}
function multiply7(int a) public returns (int result) {
result = a * 7;
return result;
}
function return13() public returns (int result) {
result = 13;
return result;
}
function setName(string _name) {
name = _name;
}
function returnString() public returns (string result) {
result = "Abracadabra";
return result;
}
}
Stress these functions in test_contract_call_interface.py and test_contract_transact_interface.
If I have a server running that gets events from a node with the contract.on method, it seems that if it fails because the node is currently not available, it is dead forever and I have no way of reacting to that.
see traceback:
Traceback (most recent call last):
File ".../local/lib/python2.7/site-packages/gevent/greenlet.py", line 534, in run
result = self._run(*self.args, **self.kwargs)
File ".../local/lib/python2.7/site-packages/web3/utils/filters.py", line 80, in _run
changes = self.web3.eth.getFilterChanges(self.filter_id)
File ".../local/lib/python2.7/site-packages/web3/utils/functional.py", line 22, in inner
value = fn(*args, **kwargs)
File ".../local/lib/python2.7/site-packages/web3/eth.py", line 310, in getFilterChanges
"eth_getFilterChanges", [filter_id],
....
, in _create_socket
raise first_error
error: [Errno 111] Connection refused
<LogFilter at 0x7fef3bfd9870> failed with error
I think it should reconnect and work again a soon as the nodes is available again, or there should be an easy way (maybe I am just not aware of it?) to react to this and reconnect in the application code, but I don't know how to do that because it runs in a Greenlet, so I don't know how to catch the Exception.
Thanks for the help.
Lots of things that web3 returns could be easily cached.
The initial idea looks something like this.
args they were looked up with. (blocks, transaction receipts, mined transactions)eth_call, transactions)eth_blockNumber/eth_coinbase could be throttled so that it will only actually make an RPC request at most once per second)
i pass all the tests fine but trying to debug them yields this error
cant see why pycharm debugger refuses to kick in
/usr/bin/python3.5 /home/lotsos/pycharm-2016.2/helpers/pydev/pydevd.py --multiproc --qt-support --client 127.0.0.1 --port 35745 --file /home/lotsos/pycharm-2016.2/helpers/pycharm/pytestrunner.py -p pytest_teamcity /home/lotsos/PycharmProjects/web3.py/tests/contracts/test_contract_class_construction.py
Testing started at 16:20 ...
Connected to pydev debugger (build 162.1237.1)
pydev debugger: process 5982 is connecting
/usr/local/lib/python3.5/dist-packages/gevent-1.1.2-py3.5-linux-x86_64.egg/gevent/monkey.py:395: RuntimeWarning: Monkey-patching not on the main thread; threading.main_thread().join() will hang from a greenlet
_warnings)
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 944, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 171, in __exit__
File "<frozen importlib._bootstrap>", line 123, in release
RuntimeError: cannot release un-acquired lock
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/lotsos/pycharm-2016.2/helpers/pydev/pydevd.py", line 1556, in <module>
globals = debugger.run(setup['file'], None, None, is_module)
File "/home/lotsos/pycharm-2016.2/helpers/pydev/pydevd.py", line 940, in run
pydev_imports.execfile(file, globals, locals) # execute the script
File "/home/lotsos/pycharm-2016.2/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "/home/lotsos/pycharm-2016.2/helpers/pycharm/pytestrunner.py", line 60, in <module>
main()
File "/home/lotsos/pycharm-2016.2/helpers/pycharm/pytestrunner.py", line 34, in main
pluginmanager=_pluginmanager, args=args)
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
return self._inner_hookexec(hook, methods, kwargs)
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
_MultiCall(methods, kwargs, hook.spec_opts).execute()
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 595, in execute
return _wrapped_call(hook_impl.function(*args), self.execute)
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 249, in _wrapped_call
wrap_controller.send(call_outcome)
File "/usr/lib/python3/dist-packages/_pytest/helpconfig.py", line 28, in pytest_cmdline_parse
config = outcome.get_result()
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 278, in get_result
raise ex[1].with_traceback(ex[2])
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 264, in __init__
self.result = func()
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
res = hook_impl.function(*args)
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 861, in pytest_cmdline_parse
self.parse(args)
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 966, in parse
self._preparse(args, addopts=addopts)
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 927, in _preparse
self.pluginmanager.load_setuptools_entrypoints("pytest11")
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 501, in load_setuptools_entrypoints
plugin = ep.load()
File "/usr/local/lib/python3.5/dist-packages/pkg_resources/__init__.py", line 2235, in load
return self.resolve()
File "/usr/local/lib/python3.5/dist-packages/pkg_resources/__init__.py", line 2241, in resolve
module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 171, in __exit__
File "<frozen importlib._bootstrap>", line 123, in release
RuntimeError: cannot release un-acquired lock
Error in sys.excepthook:
Traceback (most recent call last):
File "/home/lotsos/pycharm-2016.2/helpers/pydev/_pydevd_bundle/pydevd_breakpoints.py", line 119, in _excepthook
thread.additional_info.pydev_message = exception_breakpoint.qname
AttributeError: '_DummyThread' object has no attribute 'additional_info'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/lotsos/pycharm-2016.2/helpers/pydev/_pydevd_bundle/pydevd_breakpoints.py", line 121, in _excepthook
thread.additional_info.pydev_message = exception_breakpoint.qname.encode('utf-8')
AttributeError: '_DummyThread' object has no attribute 'additional_info'
Original exception was:
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 944, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 171, in __exit__
File "<frozen importlib._bootstrap>", line 123, in release
RuntimeError: cannot release un-acquired lock
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/lotsos/pycharm-2016.2/helpers/pydev/pydevd.py", line 1556, in <module>
globals = debugger.run(setup['file'], None, None, is_module)
File "/home/lotsos/pycharm-2016.2/helpers/pydev/pydevd.py", line 940, in run
pydev_imports.execfile(file, globals, locals) # execute the script
File "/home/lotsos/pycharm-2016.2/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "/home/lotsos/pycharm-2016.2/helpers/pycharm/pytestrunner.py", line 60, in <module>
main()
File "/home/lotsos/pycharm-2016.2/helpers/pycharm/pytestrunner.py", line 34, in main
pluginmanager=_pluginmanager, args=args)
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
return self._inner_hookexec(hook, methods, kwargs)
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
_MultiCall(methods, kwargs, hook.spec_opts).execute()
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 595, in execute
return _wrapped_call(hook_impl.function(*args), self.execute)
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 249, in _wrapped_call
wrap_controller.send(call_outcome)
File "/usr/lib/python3/dist-packages/_pytest/helpconfig.py", line 28, in pytest_cmdline_parse
config = outcome.get_result()
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 278, in get_result
raise ex[1].with_traceback(ex[2])
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 264, in __init__
self.result = func()
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
res = hook_impl.function(*args)
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 861, in pytest_cmdline_parse
self.parse(args)
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 966, in parse
self._preparse(args, addopts=addopts)
File "/usr/lib/python3/dist-packages/_pytest/config.py", line 927, in _preparse
self.pluginmanager.load_setuptools_entrypoints("pytest11")
File "/usr/lib/python3/dist-packages/_pytest/vendored_packages/pluggy.py", line 501, in load_setuptools_entrypoints
plugin = ep.load()
File "/usr/local/lib/python3.5/dist-packages/pkg_resources/__init__.py", line 2235, in load
return self.resolve()
File "/usr/local/lib/python3.5/dist-packages/pkg_resources/__init__.py", line 2241, in resolve
module = __import__(self.module_name, fromlist=['__name__'], level=0)
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 171, in __exit__
File "<frozen importlib._bootstrap>", line 123, in release
RuntimeError: cannot release un-acquired lock
Process finished with exit code 1
Empty test suite.
put a cute animal picture here.
The main web3 now depens on testrpc.rpc package, not even listed in requirements. So firstly web3 cannot be used without installing additional eth-testrpc. Moreover, eth-testrpc is not installable on Windows so we are all f*cked.
I dont know if I look at a deprecated wiki or if this function still exist, I cant find it in web3.js
https://github.com/ethereum/go-ethereum/wiki/JavaScript-Console#minersetetherbase
if it still exist it's not implemented, but I guess it doesnt and this is rather confusing to read old wikis ;)
The on and pastEvents methods on contract objects have not been implemented.
I don't understanda why, but since few days, I can't send transaction.
When I do web3.eth.sendTransaction(transaction) I've this error timeout: timed out.
the transaction looks like this : transaction = {'from': user2, 'to':user1, 'data': web3.toHex("test")}
And user1 and user2are defined . Accounts are unlocked and have gas...
Have you got any idea?
Right now web3.py use sockets on GNU/Linux to connect to the IPC. This wont work on Windows since named pipes on windows does not make use of sockets. From what google says you can use a simple file handle to write and read on the named pipe (.\pipe\geth.ipc). I have tried using simple popen/open to read and write data, but no luck.
I have also tried to use this library for python, http://docs.activestate.com/activepython/2.6/pywin32/win32file.html
Next step is to check how the JS-version of web3 is connecting to the named pipe, but i can imagine that it uses a more low level connection directly via ethereum code base.
Hi,
I was interested in adding more of the Web3 functionalities. I'm not a developer and just wanted to ask a basic question. Is it fair to say that the web3.py package formats requests into JSON RPC requests and passes onto a running ethereum node? I tried to go through the source code, but it seems like there's a lot of abstraction taking place through a package that's imported (which also seems to be labelled "web3").
If the above is true, I also struggled to see where the JSON RPC request is actually being formed.
Sorry, no cute animal pictures as this is a question rather than a pull request.
Importing TestRPCProvider gives an error.
In [1]: from web3 import Web3, TestRPCProvider
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-1-92ad247d8f86> in <module>()
----> 1 from web3 import Web3, TestRPCProvider
ImportError: cannot import name TestRPCProvider
I registred on Infura, got my token GNAGNAGNA
I read the doc and find infura mention at:
http://web3py.readthedocs.io/en/latest/managers.html
web3 = Web3(Web3.RPCProvider(host='mainnet.infura.io', path='your-infura-access-key'))
I have been trying to use syntaxes:
web3 = Web3(Web3.RPCProvider(host='mainnet.infura.io', path='GNAGNAGNA'))
web3 = Web3(Web3.RPCProvider(host='ropsten.infura.io', path='GNAGNAGNA'))
web3 = Web3(Web3.RPCProvider(host='https://mainnet.infura.io', path='GNAGNAGNA'))
web3 = Web3(Web3.RPCProvider(host='http://mainnet.infura.io', path='GNAGNAGNA'))
none of them seems to work although on nodejs:
web3 = new Web3(new Web3.providers.HttpProvider("https://ropsten.infura.io/GNAGNAGNA"));
works properly
happy holidays !
Hi,
Tried to deploy a very simple contract (divided in two files), with an owner variable (owner = msg.sender).
The problem is that when I launch some tests, the returned value is not the good one (checked on etherscan for the contract owner ad it's good).
I created a getter function that just returns an adress type variable . I am of course returning owner.
So I was wondering , is returning an address from a contract going to be well interpreted by python (address -> string) ? Or do I have a weird problem here ?
Thanks !
The current pyethereum.tester backed provider piggy backs on the web3.providers.rpc.RPCProvider and does all of it's interactions over a local HTTP server. This adds significant overhead to the interactions.
The proposed solution would be to create a new provider at web3.providers.tester.TesterProvider that talks directly to ethereum-tester-client
put a cute animal picture here.
As discussed on Gitter, PyPI should just have web3, not web3py.
geth.ipc path is given correctly, but I face this error while connecting.
RPC works fine.
File "/usr/local/lib/python2.7/dist-packages/web3/web3/ipcprovider.py", line 36, in init
self.socket = self.getSocket()
File "/usr/local/lib/python2.7/dist-packages/web3/web3/ipcprovider.py", line 42, in getSocket
sock.connect(self.ipcpath)
File "/usr/lib/python2.7/socket.py", line 228, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 2] No such file or directory
In (ethereum/solidity#1122) a "function" abi type was added. This is not yet implemented in web3.py
Example:
In my_contract:
function truebool(address a) external constant returns (bool){ return true;}
function get_function() external constant returns( function(address) external constant returns(bool) ){ return (this.truebool); }
In python:
func = my_contract.call().get_function() #returns function type my_other_contract.transact({...}).other_function(func) #expects function type as arg
Currently, func will have value None. It seems like the function type is similar to bytes24 per (http://solidity.readthedocs.io/en/develop/types.html) under function types.
It is possible to trick web3.py to return the function by changing the output type to "bytes24" in the abi for the contract, but this doesn't seem to work for input types; parity gives a Transaction execution error when trying to call other_function(func).
Currently, this won't work.
filter = web3.eth.filter('latest')
filter.watch(sys.stdout.write)
while filter.running:
gevent.sleep(0)The reason it doesn't work is that until the first gevent.sleep(..) call happens to yield the execution context, the filter's greenlet doesn't actually spin up.
I think that this could be fixed one or both of two ways.
Filter.watch add a gevent.sleep(0) to allow the greenlet to spin up. (This might be a bad idea. It feels a little wrong but it might just work fine)Filter.watch method set the running flag to True so that the pattern above will work.
The contract.new() function fails. I've fixed most of the obvious errors, will submit as a pull request.
README is not readable on PyPI: https://pypi.python.org/pypi/web3/1.4.0
setuptools-markdown allows to publish README.md on PyPi
https://github.com/pipermerriam/web3.py/blob/master/web3/contract.py#L437 should use self.web3.eth.defaultAccount instead of self.web3.eth.coinbase
Assuming that "-1" can be represented by the int8 type (range -128;+127) I have this contract
contract Example {
int8 myInt = -1;
function getMyInt() constant returns (int8) {
return myInt;
}
function getMyLittleInt() constant returns (int8 myLittleInt) {
myLittleInt = -1;
}
}
then I get an "instance" of this with web3.py and try to retrieve it but this is what I get :
>>> abi = json.loads('[{"constant":true,"inputs":[],"name":"getMyInt","outputs":[{"name":"","type":"int8"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"getMyLittleInt","outputs":[{"name":"myLittleInt","type":"int8"}],"payable":false,"type":"function"}]')
>>> myIntContract = web3.eth.contract(abi, address="0x1d4e3694b0155bf821963793ecac3b84f4a0815f")
>>> myIntContract
<web3.contract.Contract object at 0x1075a6290>
>>> myIntContract.call().getMyInt()
115792089237316195423570985008687907853269984665640564039457584007913129639679L
>>> myIntContract.call().getMyLittleInt()
115792089237316195423570985008687907853269984665640564039457584007913129639679L
Is that right ? What's wrong ?
Add CI for windows environments via https://www.appveyor.com/
When a contract throws, web3.py raises a ValueError, which has the exact type of error (TransactionFailed) hidden in its message. A ValueError in web3.py can be caused by something entirely different. Checking the fields of ValueError to make sure that it indeed is a TransactionFailed is inconvenient, and does not fit nicely into with pytest.raises() syntax.
I would like to be able to do the following:
with pytest.raises(TransactionFailed):
contract.some_method.sendTransaction(invalid_args)After initializing web3 against a local, unsynced ropsten chain, a new contract could not be called, eg. by con.call().get(). This is correct behaviour, but the error message:
BadFunctionCallOutput: Could not decode contract function call get return data 0x for output_types [u'string']
is not helpful and does not indicate where to look for an error.
Better would be something like
BadFunctionCallOutput: Could not transact with/call contract function, is contract deployed correctly and chain synced?
Calling any solidity function returning address[ ] gives address list without 0x prefix
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