Upgrade to web3py, fixes on ETHAccount/PAYG, EVM configs

[philogicae]

• Add web3py depdendencies
• Methods for balances (eth & aleph) and transactions
• Superfluid connector rework
• New config for EVM chains (allowing easy addition of new chains in the future)

[github-actions]

Summary and Highlights

This PR introduces significant changes to the Python SDK library for the Aleph.im network, including updates to dependencies, new features, and modifications to existing logic. The main changes include:

1. Dependency Updates:

   • Updated aleph-message to 0.4.9.
   • Added a new dependency superfluid@git+https://github.com/1yam/superfluid.py.git@1yam-add-base.
   • Added web3==6.3.0 as a dependency.

2. Code Refactoring:

   • The ETHAccount class has been refactored to improve readability and maintainability.
   • Added asynchronous methods for transaction signing and sending.

3. New Features:

   • Introduced asynchronous methods for creating, deleting, and updating flows in the Superfluid class.
   • Added support for multiple chains and updated the configuration to include chain-specific settings.

4. Bug Fixes and Improvements:

   • Fixed potential issues with transaction signing and broadcasting.
   • Added checks to ensure sufficient funds before initiating transactions.

Detailed Changes

pyproject.toml

• Updated aleph-message to 0.4.9.
• Replaced superfluid~=0.2.1 with superfluid@git+https://github.com/1yam/superfluid.py.git@1yam-add-base.
• Added web3==6.3.0 as a dependency.

src/aleph/sdk/chains/ethereum.py

• Added asynchronous methods for transaction signing and sending.
• Introduced connect_chain method to initialize the Web3 provider and superfluid connector.
• Added checks to ensure sufficient funds before initiating transactions.

src/aleph/sdk/conf.py

• Updated the configuration to include chain-specific settings, such as RPC URLs and chain IDs.
• Added TOKEN_DECIMALS and TX_TIMEOUT settings.

src/aleph/sdk/connectors/superfluid.py

• Introduced asynchronous methods for creating, deleting, and updating flows.
• Added checks to ensure sufficient funds before initiating flows.

src/aleph/sdk/evm_utils.py

• Added utility functions to convert between human-readable token amounts and Wei values.
• Added utility functions to get chain-specific information, such as RPC URLs and token addresses.

src/aleph/sdk/types.py

• Added ChainInfo model to store chain-specific information.

tests/unit/test_superfluid.py

• Updated unit tests to cover the new asynchronous methods in the Superfluid class.
• Added checks to ensure sufficient funds before initiating transactions.

Potential Impact and Review Complexity

The changes in this PR introduce new dependencies and refactor the existing codebase, which could potentially affect the stability and performance of the application. The review complexity is moderate due to the number of changes and the potential for introducing bugs.

Review Points:

1. Verify that the new dependencies are compatible with the existing codebase.
2. Check that the asynchronous methods for transaction signing and sending are correctly implemented.
3. Ensure that the checks for sufficient funds are correctly placed to prevent transaction failures.
4. Review the new chain-specific settings to ensure they are correctly configured.

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This categorization is based on the changes introduced in the PR and the potential impact on the codebase. The review complexity is considered moderate due to the number of changes and the potential for introducing bugs.