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Pack data tightly together and save space.

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# Hyena • [![tests](https://github.com/exp-table/hyena/actions/workflows/ci.yml/badge.svg?label=tests)](https://github.com/exp-table/hyena/actions/workflows/ci.yml) ![license](https://img.shields.io/github/license/refcell/femplate?label=license) ![solidity](https://img.shields.io/badge/solidity-^0.8.17-lightgrey)

A data packing library.

## What is Hyena?

Hyena is a library that is an alternative to `abi.encode` and `abi.encodePacked` that can result in smaller `bytes`.

It **WON'T** beat `abi.encode` or `abi.encodePacked` in terms of gas consumption but will in the size of the output. A reduction of up to 50% can be obtained.

It serves as educational material.

**Warning**

Due to how the internal "map" works, you can only pack 41 32-bytes values.

It should be noted that unpacking the payload produces an array whose elements order is in reverse w.r.t the elements that were added.

## Installation

To install with [**Foundry**](https://github.com/gakonst/foundry):

```sh
forge install exp-table/hyena
```

## Usage

```js
bytes memory payload = Hyena.init();
payload = Hyena.crush(payload, uint(100));
payload = Hyena.crush(payload, uint(2**256 - 1));
uint256[] memory outputs = Hyena.digest(payload);
```

### Notable Mentions

- [femplate](https://github.com/refcell/femplate)
- [foundry](https://github.com/foundry-rs/foundry)
- [solady](https://github.com/vectorized/solady)
- [forge-std](https://github.com/brockelmore/forge-std)
- [forge-template](https://github.com/foundry-rs/forge-template)
- [foundry-toolchain](https://github.com/foundry-rs/foundry-toolchain)

### Disclaimer

_These smart contracts are being provided as is. No guarantee, representation or warranty is being made, express or implied, as to the safety or correctness of the user interface or the smart contracts. They have not been audited and as such there can be no assurance they will work as intended, and users may experience delays, failures, errors, omissions, loss of transmitted information or loss of funds. The creators are not liable for any of the foregoing. Users should proceed with caution and use at their own risk._

See [LICENSE](./LICENSE) for more details.

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