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Comet Liquidator powered by Alchemy

A continuously running script that liquidates Compound III accounts that violate collateral requirements.

Alchemy is used to find out the current Comet borrower accounts. Alchemy Transact is used to test the liquidation transactions before they are submitted to the blockchain. Alchemy Notify is used with a Alchemy Mined Transaction Webhook. An Autocode webhook listens for the http request and sends an email via SendGrid to the liquidator.

The code in this repository is a fork of the example Comet liquidation bot in the Comet repository. Find this Compound Comet Liquidation guide for more details.

Install

Clone this repository and install Node.js and Yarn.

yarn install
yarn build

Alchemy

Get your API keys for FREE at Alchemy.com.

Autocode

Set up your Autocode account for FREE at Autocode.com. Set up the webhook (autocode/index.js) after setting up the Alchemy Notify Mined Transaction Webhook.

SendGrid

If you want to send email alerts when a transaction is mined, open a SendGrid account for FREE at sendgrid.com.

Liquidator Contract Deployments

The liquidator contract (./contracts/OnChainLiquidator.sol) is deployed and verified. Any caller of the contract can initalize a liquidation and receive the resulting excess base asset tokens if a liquidation transaction is successful.

arbitrum: '0x18A715c11Cf4ed6A0cf94FCc93a290d4b2d14dD7'
polygon: '0xbf4555f5c127479b225332cd5520cd54c68f814c'
mainnet: '0xC70e2915f019e27BAA493972e4627dbc0ED7a794'

Test Run

This command will run the liquidation bot but it will not try to liquidate borrowers, it will use Alchemy to estimate the arbitrage transaction results using Alchemy Transact simulation (Asset Changes JSON RPC endpoint).

Polygon example:

ALCHEMY_KEY="YOUR_ALCHEMY_API_KEY" \
DEPLOYMENT="usdc" \
LIQUIDATOR_ADDRESS="0xbf4555f5c127479b225332cd5520cd54c68f814c" \
USE_FLASHBOTS="false" \
ETH_PK="YOUR_PRIVATE_EVM_ACCOUNT_KEY" \
TESTRUN="true" \
npx hardhat run scripts/liquidation_bot/index.ts --network polygon

Production Run

Same as above, simply remove the TESTRUN environment variable.

ALCHEMY_KEY="YOUR_ALCHEMY_API_KEY" \
DEPLOYMENT="usdc" \
LIQUIDATOR_ADDRESS="0xbf4555f5c127479b225332cd5520cd54c68f814c" \
USE_FLASHBOTS="false" \
ETH_PK="YOUR_PRIVATE_EVM_ACCOUNT_KEY" \
npx hardhat run scripts/liquidation_bot/index.ts --network polygon