### Install development dependencies

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Navigate to the project directory, create and activate a virtual environment, and install the project with development dependencies. Pre-commit hooks are also installed.

```sh
cd eth-abi
virtualenv -p python venv
. venv/bin/activate
python -m pip install -e ".[dev]"
pre-commit install
```

--------------------------------

### Install eth-abi with tools extra

Source: https://github.com/apeworx/eth-abi/blob/main/docs/tools.md

Install the eth-abi package with the 'tools' extra requirement to access additional functionalities like ABI type strategies.

```bash
python -m pip install "eth-abi[tools]"
```

--------------------------------

### Install eth-abi Package

Source: https://github.com/apeworx/eth-abi/blob/main/README.md

Install the eth-abi package using pip. This command is used to add the library to your Python environment.

```sh
python -m pip install eth-abi
```

--------------------------------

### Build and test release package

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Before releasing, build the package and install it in a temporary virtual environment to test its functionality.

```sh
git checkout main && git pull
make package-test
```

--------------------------------

### Build documentation

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Generate the project's documentation locally to review before publishing.

```sh
make docs
```

--------------------------------

### Clone the repository

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Fork the eth-abi repository and clone it to your local development machine.

```sh
git clone git@github.com:your-github-username/eth-abi.git
```

--------------------------------

### Build release notes

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Generate release notes by specifying the version part to bump. This should be done before bumping the version number.

```sh
make notes bump=$$VERSION_PART_TO_BUMP$$
```

--------------------------------

### Release new version

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Automate the process of bumping the version, creating a commit and tag, building the package, and pushing to GitHub and PyPI.

```sh
make release bump=$$VERSION_PART_TO_BUMP$$
```

--------------------------------

### Lint code with pre-commit

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Manually run the pre-commit hooks to enforce code style and formatting across the project.

```sh
make lint
```

--------------------------------

### Show version bump preview

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Preview the effect of bumping a specific version part without making any changes.

```sh
bump-my-version show-bump
```

--------------------------------

### Run all tests

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Execute all tests in the project to ensure code integrity and identify potential issues.

```sh
pytest tests
```

--------------------------------

### Validate newsfragments

Source: https://github.com/apeworx/eth-abi/blob/main/docs/contributing.md

Ensure that all newsfragments are correctly formatted and ready for release note generation.

```sh
make validate-newsfragments
```

--------------------------------

### Register Custom Null Encoder and Decoder

Source: https://github.com/apeworx/eth-abi/blob/main/docs/registry.md

Register custom encoder and decoder classes for a 'null<M>' type, where M specifies the number of 32-byte words. Uses a type string matcher function and custom coder classes inheriting from BaseEncoder and BaseDecoder.

```python
from eth_abi.registry import registry
from eth_abi.base import BaseEncoder, BaseDecoder

class EncodeNull(BaseEncoder):
    word_width = 1

    @classmethod
    def from_type_str(cls, typestr):
        return cls(word_width=int(typestr[4:]))

    def encode(self, value):
        if value is not None:
            raise ValueError("Value must be None for null type")
        return b'\x00' * (self.word_width * 32)

class DecodeNull(BaseDecoder):
    word_width = 1

    @classmethod
    def from_type_str(cls, typestr):
        return cls(word_width=int(typestr[4:]))

    def decode(self, stream):
        stream.seek(self.word_width * 32)
        return None

registry.register(
    lambda x: x.startswith('null'),
    EncodeNull,
    DecodeNull,
    label='null'
)
```

--------------------------------

### Handle Malformed Strings During Decoding

Source: https://github.com/apeworx/eth-abi/blob/main/docs/registry.md

Register a custom decoder for strings to handle malformed UTF-8 bytes using different error handling strategies like 'ignore', 'replace', or 'surrogateescape'.

```python
from eth_abi.registry import registry
from eth_abi.decoding import StringDecoder

# Example: Registering to ignore errors
registry.register_decoder(StringDecoder(errors='ignore'), label='string')

# Example: Registering to replace errors
# registry.register_decoder(StringDecoder(errors='replace'), label='string')

# Example: Registering to use surrogateescape
# registry.register_decoder(StringDecoder(errors='surrogateescape'), label='string')
```

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