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https://github.com/haydenshively/new-bedford
Flash swap liquidation bot for compound.finance + flashbots
https://github.com/haydenshively/new-bedford
ethereum liquidation smart-contract web3js
Last synced: 4 days ago
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Flash swap liquidation bot for compound.finance + flashbots
- Host: GitHub
- URL: https://github.com/haydenshively/new-bedford
- Owner: haydenshively
- Created: 2021-02-26T22:26:56.000Z (almost 4 years ago)
- Default Branch: master
- Last Pushed: 2024-11-25T00:02:50.000Z (about 1 month ago)
- Last Synced: 2024-12-15T20:11:32.115Z (11 days ago)
- Topics: ethereum, liquidation, smart-contract, web3js
- Language: TypeScript
- Homepage:
- Size: 697 KB
- Stars: 241
- Watchers: 6
- Forks: 77
- Open Issues: 3
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Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# New Bedford
New Bedford is a (massively) upgraded version of [Nantucket](https://github.com/haydenshively/Nantucket)
that some of you are probably familiar with. I'm releasing this now because I don't feel like making upgrades
for the new Chainlink oracle setup (and I don't want to pay for [bloXroute](https://bloxroute.com/) to backrun
the price updates). Despite this lack of compatibility, I hope something in here is useful to someone.
## Features
### Solidity
- 🦄 Liquidate via Uniswap (v2) flash swaps
- Intelligently select between 1 hop vs 2 hop paths based on expected slippage
- 🔢 Liquidate multiple accounts at once
- 🧮 Compute repay amounts atomically on-chain
- ⛽️ Burn CHI to reduce gas costs **or** use custom CHI-like implementation to avoid
extraneous `transfer`s and `emit`s
- https://github.com/matnad/liquid-gas-token
- 🏷 Atomically post prices to Compound's Open Price Feed
- _This won't work anymore because of Chainlink 😞_
- ⛏ Updateable `MinerPayer` in case Flashbots makes searchers pay a contract
- 📦 Adjust % paid to miner at bundle creation time
- 🥸 Incognito mode for PGAs - rotate to & from addresses after each successful transaction
> NOTE: These features are spread across the [ethereum-pga](./ethereum-pga) and [ethereum-flashbots](./ethereum-flashbots)
> directories. `ethereum-flashbots` is generally better.
### TypeScript
- Fetch accounts from Compound's API on startup
- Subscribe to Compound contract events to stay up-to-date after that
- Poll Coinbase Pro API and see if new prices make any account liquidatable
- _This won't work anymore because of Chainlink 😞_
- Keep track of min & max prices since last on-chain posting, and use combination most likely to make an account liquidatable
- Split architecture that communicates over IPC
- [delegator](./services/delegator) subscribes to events and watches for accounts to become liquidatable
- [txmanager](./services/txmanager) receives liquidatable accounts + params from `delegator` and formulates transactions for PGAs
- [txmanager-mev](./services/txmanager-mev) receives liquidatable accounts + params from `delegator` and formulates transactions for flashbots
- Extensive logging with Winston; optional Slack bot integration
- Decent test coverage
> NOTE: Most of this won't work without my `web3-blocks` library, which is still private. But if you can infer
> what functionality needs to be there and replicate the API, you might be able to get this running.
## Usage and Disclaimer
Don't. You will almost certainly loose money. Feel free to admire the code or use it as
a reference point, but please don't try to run it as-is.