https://github.com/gakonst/solidity-bls

BLS threshold signature verification in Solidity
https://github.com/gakonst/solidity-bls

Last synced: 12 days ago
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BLS threshold signature verification in Solidity

• Host: GitHub
• URL: https://github.com/gakonst/solidity-bls
• Owner: gakonst
• License: mit
• Created: 2018-09-22T06:53:32.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2018-09-22T00:32:20.000Z (about 6 years ago)
• Last Synced: 2024-10-04T13:34:59.822Z (about 1 month ago)
• Language: JavaScript
• Size: 9.77 KB
• Stars: 18
• Watchers: 2
• Forks: 6
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

        
# solidity-bls

**Note**: This repository is a WIP and will be updated frequently in the coming weeks. This is probably completely broken, please don't use this in production!

---

This is a library for verifying [BLS signatures](https://en.wikipedia.org/wiki/Boneh%E2%80%93Lynn%E2%80%93Shacham) over [bn128](https://www.cryptojedi.org/papers/pfcpo.pdf) in Solidity. Almost all of the code here is taken from [BjornvdLaan's work](https://gist.github.com/BjornvdLaan/ca6dd4e3993e1ef392f363ec27fe74c4) and the work on ZoKrates available [here](https://github.com/JacobEberhardt/ZoKrates/blob/da5b13f845145cf43d555c7741158727ef0018a2/zokrates_core/src/verification.rs).

## TODO

- [ ] Add real testing

- [ ] See if there are any obvious optimizations

- [ ] Add support for verification of signatures with different messages

## Testing

We use [Truffle](https://truffleframework.com/) for testing.

```

$ truffle test

Compiling ./contracts/BLS.sol...

Compiling ./contracts/BLSTest.sol...

Compiling ./contracts/Migrations.sol...

Compiling ./contracts/Pairing.sol...

  Contract: BLS

    ✓ should verify a valid signature (302ms)

    ✓ should not verify a invalid signature (59ms)

    ✓ should not verify a invalid message (291ms)

```

## Gas Cost

The cost of verifying a signature is currently ~365,000 gas.