Package: pm-dev-gnosis-py
Gnosis-py includes a set of libraries to work with Ethereum and Gnosis projects:EthereumClient, a wrapper over Web3.pyWeb3client including utilities to deal with ERC20/721
tokens and tracing.Gnosis Safeclasses and utilities.Price oracles forUniswap,Kyber…Django serializers, models and utils.Quick startJust runpip installgnosis-pyor add it to yourrequirements.txtIf you want django ethereum utils (models, serializers, filters…) you need to runpip installgnosis-py[django]If you have issues buildingcoincurvemaybeyou are missing some librariesContributing to gnosis-pyClone the repo, then to set it up:python-mvenvvenvsourcevenv/bin/activatepipinstall-rrequirements-dev.txtpre-commitinstall-fEthereum utilsgnosis.ethclass EthereumClient (ethereum_node_url: str): Class to connect and do operations
with a ethereum node. Uses web3 and raw rpc calls for things not supported in web3.
Onlyhttp/httpsurls are suppored for the node url.EthereumClienthas some utils that improve a lot performance using Ethereum nodes, like
the possibility of doingbatch_calls(a single request making read-only calls to multiple contracts):fromgnosis.ethimportEthereumClientfromgnosis.eth.contractsimportget_erc721_contractethereum_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 underlyingweb3.pylibrary:fromgnosis.ethimportEthereumClientethereum_client=EthereumClient(ETHEREUM_NODE_URL)ethereum_client.w3.eth.get_block(57)gnosis.eth.constantsNULL_ADDRESS(0x000...0): Solidityaddress(0).SENTINEL_ADDRESS(0x000...1): Used for Gnosis Safe’s linked lists (modules, owners…).Maximum an minimum values forR,SandVin ethereum signatures.gnosis.eth.oraclesPrice oracles for Uniswap, UniswapV2, Kyber, SushiSwap, Aave, Balancer, Curve, Mooniswap, Yearn…
Example:fromgnosis.ethimportEthereumClientfromgnosis.eth.oraclesimportUniswapV2Oracleethereum_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)gnosis.eth.utilsContains utils for ethereum operations:get_eth_address_with_key()->Tuple[str, bytes]: Returns a tuple of a valid public ethereum checksumed
address with the private key.generate_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) utilsDjango utils are available undergnosis.eth.django.
You can find a set of helpers for working with Ethereum using Django and Django Rest framework.It includes:gnosis.eth.django.filters: EthereumAddressFilter.gnosis.eth.django.models: Model fields (Ethereum address, Ethereum big integer field).gnosis.eth.django.serializers: Serializer fields (Ethereum address field, hexadecimal field).gnosis.eth.django.validators: Ethereum related validators.gnosis.safe.serializers: Serializers for Gnosis Safe (signature, transaction…).All the tests are written using Django Test suite.ContributorsSee contributors