safe-eth-py 7.19.0
Safe Ecosystem Foundation utilities for Ethereum projects
Requires Python: >=3.10
Keywords: cowswap, django, ethereum, gnosis, safe, safe_eth, web3

Safe-eth-py (previously known as Gnosis-py)
###########################################

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Safe-eth-py includes a set of libraries to work with Ethereum and relevant Ethereum projects:
  - `EthereumClient`, a wrapper over Web3.py `Web3` client including utilities to deal with ERC20/721
    tokens and tracing.
  - `Safe <https://github.com/safe-global/safe-contracts>`_ classes and utilities.
  - Price oracles for `Uniswap`, `Kyber`...
  - Django serializers, models and utils.

Quick start
-----------

Just run ``pip install safe-eth-py`` or add it to your **requirements.txt**

If you want django ethereum utils (models, serializers, filters...) you need to run
``pip install safe-eth-py[django]``

If you have issues building **coincurve** maybe
`you are missing some libraries <https://ofek.dev/coincurve/install/#source>`_


Contributing to safe-eth-py
---------------------------
Clone the repo, then to set it up:

.. code-block:: bash

    python -m venv venv
    source venv/bin/activate
    pip install -r requirements-dev.txt
    pre-commit install -f

Add new address for new chains
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If you want to add Safe Smart Account support for a new chain you must `open a new issue <https://github.com/safe-global/safe-eth-py/issues/new?assignees=&labels=add-new-address&projects=&template=add_safe_address_new_chain.yml&title=%5BNew+chain%5D%3A+%7Bchain+name%7D>`_.

Once the issue is created or edited, an automatic validation will be executed and a **Pull Request** will be created if everything is ok. Finally, the Safe team will review and merge the automatic **Pull Request** generated from the issue.

Ethereum utils
--------------
safe_eth.eth
~~~~~~~~~~~~
- ``class EthereumClient (ethereum_node_url: str)``: Class to connect and do operations
  with an ethereum node. Uses web3 and raw rpc calls for things not supported in web3.
  Only ``http/https`` urls are supported for the node url.

``EthereumClient`` has some utils that improve a lot performance using Ethereum nodes, like
the possibility of doing ``batch_calls`` (a single request making read-only calls to multiple contracts):

.. code-block:: python

  from safe_eth.eth import EthereumClient
  from safe_eth.eth.contracts import get_erc721_contract
  ethereum_client = EthereumClient(ETHEREUM_NODE_URL)
  erc721_contract = get_erc721_contract(self.w3, token_address)
  name, symbol = ethereum_client.batch_call([
                      erc721_contract.functions.name(),
                      erc721_contract.functions.symbol(),
                  ])

If you want to use the underlying `web3.py <https://github.com/ethereum/web3.py>`_ library:

.. code-block:: python

  from safe_eth.eth import EthereumClient
  ethereum_client = EthereumClient(ETHEREUM_NODE_URL)
  ethereum_client.w3.eth.get_block(57)


safe_eth.eth.constants
~~~~~~~~~~~~~~~~~~~~~~
- ``NULL_ADDRESS (0x000...0)``: Solidity ``address(0)``.
- ``SENTINEL_ADDRESS (0x000...1)``: Used for Safe's linked lists (modules, owners...).
- Maximum and minimum values for `R`, `S` and `V` in ethereum signatures.

safe_eth.eth.oracles
~~~~~~~~~~~~~~~~~~~~
Price oracles for Uniswap, UniswapV2, Kyber, SushiSwap, Aave, Balancer, Curve, Mooniswap, Yearn...
Example:

.. code-block:: python

  from safe_eth.eth import EthereumClient
  from safe_eth.eth.oracles import UniswapV2Oracle
  ethereum_client = EthereumClient(ETHEREUM_NODE_URL)
  uniswap_oracle = UniswapV2Oracle(ethereum_client)
  gno_token_mainnet_address = '0x6810e776880C02933D47DB1b9fc05908e5386b96'
  weth_token_mainnet_address = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2'
  price = uniswap_oracle.get_price(gno_token_mainnet_address, uniswap_oracle.weth_address)



safe_eth.eth.utils
~~~~~~~~~~~~~~~~~~

Contains utils for ethereum operations:

- ``mk_contract_address_2(from_: Union[str, bytes], salt: Union[str, bytes], init_code: [str, bytes]) -> str``:
  Calculates the address of a new contract created using the new CREATE2 opcode.

Ethereum django (REST) utils
----------------------------
Django utils are available under ``safe_eth.eth.django``.
You can find a set of helpers for working with Ethereum using Django and Django Rest framework.

It includes:

- **safe_eth.eth.django.filters**: EthereumAddressFilter.
- **safe_eth.eth.django.models**: Model fields (Ethereum address, Ethereum big integer field).
- **safe_eth.eth.django.serializers**: Serializer fields (Ethereum address field, hexadecimal field).
- **safe_eth.eth.django.validators**: Ethereum related validators.
- **safe_eth.safe.serializers**: Serializers for Safe (signature, transaction...).
- All the tests are written using Django Test suite.


Safe APIs
--------------
safe_eth.safe.api
~~~~~~~~~~~~~~~~~
Interaction with the Safe Transaction Service API to manage Safes, transactions, delegates, and messages.

To use the default Transaction Service, you need an API key. You can set this API key either as an environment variable
or pass it directly to the constructor using the `api_key` parameter. To obtain your API key, create an account on the
Safe Developer Portal at https://developer.safe.global. Additionally, you can choose to use a custom service by setting
the `base_url` parameter, the API key may not be required.

.. code-block:: bash

 export SAFE_TRANSACTION_SERVICE_API_KEY=[api-key-jwt-token-value]

Example:

.. code-block:: python

    from safe_eth.eth import EthereumNetwork
    from safe_eth.safe.api import TransactionServiceApi

    transaction_service_api = TransactionServiceApi(EthereumNetwork.GNOSIS)
    transactions = transaction_service_api.get_transactions("0xAedF684C1c41B51CbD228116e11484425d2FACB9")

Contributors
------------
`See contributors <https://github.com/safe-global/safe-eth-py/graphs/contributors>`_

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