Samuel Hawksby-Robinson c8f9dad554
Feature/key compression (#1990)
## What has changed?

I've introduced to the public binding functionality that will compress and decompress public keys of a variety of encoding and key types. This functionality supports all major byte encoding formats and the following EC public key types:

- `secp256k1` pks
- `bls12-381 g1` pks
- `bls12-381 g2` pks

## Why make the change?

We want shorter public (chat) keys and we want to be future proof and encoding agnostic. See the issue here https://github.com/status-im/status-go/issues/1937

---

* Added basic signature for compresspk and uncompresspk

* Added basic encoding information

* make vendor

* formatted imports for the linter

* Reformatted imports hoping linter likes it

* This linter is capricious

* Added check that the secp256k1 key is valid

* Added test for valid key

* Added multiformat/go-varint dep

* Added public key type handling

* Added key decompression with key type handling

* Added handling for '0x' type indentifying

* Added more robust testing

* Less lint for the linting gods

* make vendor for bls12_381

* Added bls12-381 compression tests

* Added decompress key expected results

* Refactor of typed and untyped keys in tests

* Lint god appeasment

* Refactor of sample public keys

* Implemented bls12-381 decompression

* gofmt

* Renamed decode/encode funcs to be more descriptive

* Added binary bindings for key de/compression

* Refactor of func parameters

gomobile is a bit tempermental using raw bytes as a parameter, so I've decided to use string only inputs and outputs

* gofmt

* Added function documentation

* Moved multiformat de/compression into api/multiformat ns

* Moved multiformat de/compression into api/multiformat ns

* Changed compress to serialize on API
2020-06-23 11:47:17 +01:00

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Markdown

# go-varint
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> Varint helpers that enforce minimal encoding.
## Table of Contents
- [Install](#install)
- [Contribute](#contribute)
- [License](#license)
## Install
```sh
go get github.com/multiformats/go-varint
```
## Contribute
Contributions welcome. Please check out [the issues](https://github.com/multiformats/go-multiaddr/issues).
Check out our [contributing document](https://github.com/multiformats/multiformats/blob/master/contributing.md) for more information on how we work, and about contributing in general. Please be aware that all interactions related to multiformats are subject to the IPFS [Code of Conduct](https://github.com/ipfs/community/blob/master/code-of-conduct.md).
Small note: If editing the README, please conform to the [standard-readme](https://github.com/RichardLitt/standard-readme) specification.
## License
[MIT](LICENSE) © 2019 Protocol Labs