https://github.com/kendricktan/heiswap-dapp

Heiswap Dapp - Mix and Mask your Ethereum Transactions!
https://github.com/kendricktan/heiswap-dapp

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Heiswap Dapp - Mix and Mask your Ethereum Transactions!

• Host: GitHub
• URL: https://github.com/kendricktan/heiswap-dapp
• Owner: kendricktan
• License: mit
• Created: 2019-06-27T05:59:15.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2022-12-10T20:38:51.000Z (almost 2 years ago)
• Last Synced: 2024-04-14T11:32:49.031Z (7 months ago)
• Language: JavaScript
• Homepage: https://heiswap.exchange/
• Size: 8.13 MB
• Stars: 109
• Watchers: 7
• Forks: 27
• Open Issues: 32
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Heiswap Dapp

---

| Branch | Status | URL |

| --- | --- | --- |

| master | [![Build Status](https://travis-ci.org/kendricktan/heiswap-dapp.svg?branch=master)](https://travis-ci.org/kendricktan/heiswap-dapp) | heiswap.exchange |

---

Heiswap (黑 swap) is an Ethereum transaction mixer that ultilizes parts of [CryptoNote](https://cryptonote.org) to enable zero-knowledge transactions.

It ulitilizes Ring Signatures and pseudo-stealth addresses to achieve its zero-knowledge properties. The [deployed smart contract](https://ropsten.etherscan.io/address/0x8AAbE42EeCA45E040fab330fD24eA6746b832Ad2) handles the signature verification, while the client is responsible for generating the pseudo-stealth address.

Ring signatures was only possible on the EVM (gas-wise) due to the recent addition of [EIP198](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-198.md) and [EIP1895](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1895.md).

[You can play with the Ropsten version right now](https://heiswap.exchange/).

# Development

Project is a standard `create-react-app` project, using `truffle` to compile, migrate and deploy contracts.

Solidity files are located in `contracts`, and compiled to `src/contracts`

Run `yarn start` to run the project.

The [proof-of-concept repository is located here](https://github.com/kendricktan/heiswap-poc).

## Verifying Contract on Etherscan

1. Deploy to etherscan. (`truffle migrate --network ropsten`)

    - Remember to export ENV vars `ETH_SK` and `INFURA_KEY`

2. Install [truffle-flattener](https://www.npmjs.com/package/truffle-flattener)

3. Flatten source files: `truffle-flattener contracts/AltBn128.sol contracts/Heiswap.sol contracts/LSAG.sol > /tmp/etherscan.sol`

4. Upload single large file (`/tmp/etherscan.sol`) on to etherscan to verify, remember to add the library addresses from `src/contracts/Heiswap.json` -> `links`.

# Special Thanks

This project would not have been possible without the existence of other open sourced projects, most notably

- [HarryR](https://github.com/HarryR/solcrypto)

- [CryptoNote](https://eprint.iacr.org/2004/027.pdf)

- [Piper Merriam](https://github.com/ethereum/py_ecc/blob/master/py_ecc/bn128/bn128_curve.py)