Web3.py
Project description
# Web3.py
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A python implementation of [web3.js](https://github.com/ethereum/web3.js)
## Goals
* Python 2.7, 3.4, 3.5 support
* Provide a feature-for-feature python implementation of Web3.js
## Installation
```sh
pip install web3
```
## API
This documentation is not yet complete, although the API should offer most functionality described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API), except for contract events and filters.
### Initialisation
Initialising the Ethereum node
```sh
# IPC
geth --unlock 0 console
# RPC, if required, with --rpcaddr "localhost" --rpcport <port>
geth --rpc --unlock 0 console
```
Connecting to the Ethereum node
```python
from web3 import Web3, RPCProvider, IPCProvider
# Initialising a Web3 instance with an RPCProvider:
web3rpc = Web3(RPCProvider(host="127.0.0.1", port="8545"))
# Initialising a Web3 instance with an IPCProvider:
web3ipc = Web3(IPCProvider(ipcpath=None, testnet=False))
# Both arguments can be omitted, the ipcpath should be found automatically
```
### Testing
For testing you can use the `TestRPCProvider`. This depends on
`eth-testrpc>=0.2.0` which must be installed independently (It is not included
as a hard dependency for this package.)
```python
from web3 import Web3, TestRPCProvider
# Initialising a Web3 instance with an RPCProvider:
web3rpc = Web3(TestRPCProvider())
# or specifying host and port.
web3rpc = Web3(TestRPCProvider(host="127.0.0.1", port="8545"))
```
The `TestRPCProvider` uses an EVM backed by the `ethereum.tester` module from
the `pyethereum` package. This can be quite useful for testing your code which
uses `web3.py`.
### Setting defaults
```python
web3.config.defaultAccount = <your (unlocked) account>
web3.config.defaultBlock = "latest"
# Can also be an integer or one of "latest", "pending", "earliest"
```
### Interacting with contracts
```python
abi = "<abi string>"
contractFactory = web3.eth.contract(abi)
contract = contractFactory.at("0xaddress")
# The abi methods should now be available on the contract instance
```
### Timeouts, blocking and nonblocking requests
All function and property requests block by default until the result is available. It is possible to provide an additional keyword argument 'timeout'.
```python
# Blocks indefinitely
>>> web3.eth.getBalance("0xaddress", timeout=None)
23423234
# Blocks until the response is available until the timeout is reached
# returning the response or raising a ValueError with the request id
>>> web3.eth.getBalance("0xaddress", timeout=3) # in seconds
23423234
# Does not block, returns the unique request id immediately
id = web3.eth.getBalance("0xaddress", timeout=0)
# This id can be used to poll the Web3 instance later:
web3.receive(id, timeout=0, keep=False)
# By default, the timeout is 0 and the receive function does not block, returning None if
# the response wasn't available. Otherwise, the timeout argument has the same behaviour
# as a normal call described above.
# Receive will discard the response after the call unless keep is true.
```
### `web3`
#### web3.db.*
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
#### web3.eth.*,
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
#### web3.net.*
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
#### web3.personal.*
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
#### web3.ssh.*
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
##### `web3.sha3`
```python
>>> web3.sha3(b'some text')
'46ba1b442d3606a3437800ee7ae5a0249756405e676739b46aa8f6e85b13fe2b'
>>> web3.sha3('0x80', encoding='hex')
'56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421'
```
#### `web3.eth`
##### `web3.eth.iban`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK")
<web3.eth.iban.Iban at 0x107301dd8>
```
###### `web3.eth.iban.fromAddress`
```python
>>> web3.eth.iban.fromAddress('0x00c5496aee77c1ba1f0854206a26dda82a81d6d8').toString()
'XE7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS'
```
###### `web3.eth.iban.fromBban`
```python
>>> web3.eth.iban.fromBban('ETHXREGGAVOFYORK').toString()
'XE81ETHXREGGAVOFYORK'
```
###### `web3.eth.iban.createIndirect`
```python
>>> web3.eth.iban.createIndirect({
... 'institution': "XREG",
... 'identifier': "GAVOFYORK"
... }).toString()
'XE81ETHXREGGAVOFYORK'
```
###### `web3.eth.iban.isValid`
```python
>>> web3.eth.iban.isValid("XE81ETHXREGGAVOFYORK")
True
>>> web3.eth.iban.isValid("XE82ETHXREGGAVOFYORK")
False # false, cause checksum is incorrect
web3.eth.iban("XE81ETHXREGGAVOFYORK").isValid()
True
```
###### `web3.eth.iban.isDirect`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").isDirect()
False
```
###### `web3.eth.iban.isIndirect`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").isIndirect()
True
```
###### `web3.eth.iban.checksum`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").checksum()
'81'
```
###### `web3.eth.iban.institution`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").institution()
'XREG'
```
###### `web3.eth.iban.client`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").client()
'GAVOFYORK'
```
###### `web3.eth.iban.address`
```python
>>> web3.eth.iban('XE7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS').address()
'00c5496aee77c1ba1f0854206a26dda82a81d6d8'
```
###### `web3.eth.iban.toString`
```python
>>> web3.eth.iban('XE7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS').toString()
'XE7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS'
```
[](https://gitter.im/pipermerriam/web3.py?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
[](https://travis-ci.org/pipermerriam/web3.py)
[](https://readthedocs.org/projects/web3.py/?badge=latest)
[](https://pypi-hypernode.com/pypi/web3.py)
[](https://pypi-hypernode.com/pypi/web3.py)
A python implementation of [web3.js](https://github.com/ethereum/web3.js)
## Goals
* Python 2.7, 3.4, 3.5 support
* Provide a feature-for-feature python implementation of Web3.js
## Installation
```sh
pip install web3
```
## API
This documentation is not yet complete, although the API should offer most functionality described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API), except for contract events and filters.
### Initialisation
Initialising the Ethereum node
```sh
# IPC
geth --unlock 0 console
# RPC, if required, with --rpcaddr "localhost" --rpcport <port>
geth --rpc --unlock 0 console
```
Connecting to the Ethereum node
```python
from web3 import Web3, RPCProvider, IPCProvider
# Initialising a Web3 instance with an RPCProvider:
web3rpc = Web3(RPCProvider(host="127.0.0.1", port="8545"))
# Initialising a Web3 instance with an IPCProvider:
web3ipc = Web3(IPCProvider(ipcpath=None, testnet=False))
# Both arguments can be omitted, the ipcpath should be found automatically
```
### Testing
For testing you can use the `TestRPCProvider`. This depends on
`eth-testrpc>=0.2.0` which must be installed independently (It is not included
as a hard dependency for this package.)
```python
from web3 import Web3, TestRPCProvider
# Initialising a Web3 instance with an RPCProvider:
web3rpc = Web3(TestRPCProvider())
# or specifying host and port.
web3rpc = Web3(TestRPCProvider(host="127.0.0.1", port="8545"))
```
The `TestRPCProvider` uses an EVM backed by the `ethereum.tester` module from
the `pyethereum` package. This can be quite useful for testing your code which
uses `web3.py`.
### Setting defaults
```python
web3.config.defaultAccount = <your (unlocked) account>
web3.config.defaultBlock = "latest"
# Can also be an integer or one of "latest", "pending", "earliest"
```
### Interacting with contracts
```python
abi = "<abi string>"
contractFactory = web3.eth.contract(abi)
contract = contractFactory.at("0xaddress")
# The abi methods should now be available on the contract instance
```
### Timeouts, blocking and nonblocking requests
All function and property requests block by default until the result is available. It is possible to provide an additional keyword argument 'timeout'.
```python
# Blocks indefinitely
>>> web3.eth.getBalance("0xaddress", timeout=None)
23423234
# Blocks until the response is available until the timeout is reached
# returning the response or raising a ValueError with the request id
>>> web3.eth.getBalance("0xaddress", timeout=3) # in seconds
23423234
# Does not block, returns the unique request id immediately
id = web3.eth.getBalance("0xaddress", timeout=0)
# This id can be used to poll the Web3 instance later:
web3.receive(id, timeout=0, keep=False)
# By default, the timeout is 0 and the receive function does not block, returning None if
# the response wasn't available. Otherwise, the timeout argument has the same behaviour
# as a normal call described above.
# Receive will discard the response after the call unless keep is true.
```
### `web3`
#### web3.db.*
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
#### web3.eth.*,
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
#### web3.net.*
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
#### web3.personal.*
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
#### web3.ssh.*
Available as described in the [Javascript API documentation](https://github.com/ethereum/wiki/wiki/JavaScript-API).
##### `web3.sha3`
```python
>>> web3.sha3(b'some text')
'46ba1b442d3606a3437800ee7ae5a0249756405e676739b46aa8f6e85b13fe2b'
>>> web3.sha3('0x80', encoding='hex')
'56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421'
```
#### `web3.eth`
##### `web3.eth.iban`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK")
<web3.eth.iban.Iban at 0x107301dd8>
```
###### `web3.eth.iban.fromAddress`
```python
>>> web3.eth.iban.fromAddress('0x00c5496aee77c1ba1f0854206a26dda82a81d6d8').toString()
'XE7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS'
```
###### `web3.eth.iban.fromBban`
```python
>>> web3.eth.iban.fromBban('ETHXREGGAVOFYORK').toString()
'XE81ETHXREGGAVOFYORK'
```
###### `web3.eth.iban.createIndirect`
```python
>>> web3.eth.iban.createIndirect({
... 'institution': "XREG",
... 'identifier': "GAVOFYORK"
... }).toString()
'XE81ETHXREGGAVOFYORK'
```
###### `web3.eth.iban.isValid`
```python
>>> web3.eth.iban.isValid("XE81ETHXREGGAVOFYORK")
True
>>> web3.eth.iban.isValid("XE82ETHXREGGAVOFYORK")
False # false, cause checksum is incorrect
web3.eth.iban("XE81ETHXREGGAVOFYORK").isValid()
True
```
###### `web3.eth.iban.isDirect`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").isDirect()
False
```
###### `web3.eth.iban.isIndirect`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").isIndirect()
True
```
###### `web3.eth.iban.checksum`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").checksum()
'81'
```
###### `web3.eth.iban.institution`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").institution()
'XREG'
```
###### `web3.eth.iban.client`
```python
>>> web3.eth.iban("XE81ETHXREGGAVOFYORK").client()
'GAVOFYORK'
```
###### `web3.eth.iban.address`
```python
>>> web3.eth.iban('XE7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS').address()
'00c5496aee77c1ba1f0854206a26dda82a81d6d8'
```
###### `web3.eth.iban.toString`
```python
>>> web3.eth.iban('XE7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS').toString()
'XE7338O073KYGTWWZN0F2WZ0R8PX5ZPPZS'
```
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