https://github.com/flashbots/eip-712-swap-poc

https://github.com/flashbots/eip-712-swap-poc

Last synced: 10 months ago
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• Host: GitHub
• URL: https://github.com/flashbots/eip-712-swap-poc
• Owner: flashbots
• Created: 2022-04-01T05:05:50.000Z (about 4 years ago)
• Default Branch: main
• Last Pushed: 2022-06-17T22:08:56.000Z (almost 4 years ago)
• Last Synced: 2025-08-18T01:47:56.324Z (10 months ago)
• Language: Solidity
• Size: 2.07 MB
• Stars: 11
• Watchers: 2
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# EIP-712 swap PoC

Uses strongly-typed signed messages to send "Uniswap orders" to a block builder (e.g. Flashbots).

![i think this is how it works](/eip-712-diagram.png)

## Helpful stuff

* `contracts/` and `backend/` require that you `cp .env.example .env` and modify the contents to suit your needs

* `yarn start` will run `backend` and `frontend`.

* `cd contracts/ && yarn deploy-goerli`

### Tokens with Uniswap liquidity on Goerli

| Token | Address |

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

| MNY | 0x7ebC3778cF08f636805D9382D6c16e79ed9F370E |

| MNY2 | 0x3041EfE098e2cde8420DD16c9fBF5bde630f6168 |

| PMNY | 0xeBa14FbBbf1B10e7dB7EA5cAdDD52160aa8873f3 |

| WETH | 0xB4FBF271143F4FBf7B91A5ded31805e42b2208d6 |

graph edges represent existing liquidity pools:

![uniswap LP diagram](/uni-lp-diagram.jpg?raw=true)

## TODO

* [x] verify signed message

* [x] upgrade signed message type to V4

* [x] write smart contract (validator/executor) to decode tx and verify signature

* [x] send to uniswap from (validator/executor)

  * [x] implement v2 functions, use SwapRouter (v2 + v3) if possible

* [ ] ~~send (validator/executor) tx to flashbots~~ (not important for PoC)