Lens Handle Recover Bot

Table of contents

• About the project
• Installation and usage
• Troubleshooting

About the project

This is a script that relies on Marlin flashbots to recover a Lens Handle from a compromised wallet, sending a bundle with the funding tx + the transfer tx in the same block

Installation and usage

.env

cp .env.example .env

To complete the .env file, you will need:

• POLYGON_RPC_URL: A node endpoint, you can get it from Chainlist
• COMPROMISED_PRIVATE_KEY: The private key of the compromised account with the Lens handle
• NON_COMPROMISED_PRIVATE_KEY: A "sponsor" private key that will fund the compromised account
• TOKEN_ID: The token ID of the Lens handle that you want to recover. You can find it in OpenSea

Running the bot

npm i -g ts-node # If ts-node is not installed
ts-node --esm index.ts 

Troubleshooting

Due to the high speed in which Polygon creates new blocks (2s), it is very possible that at the time of sending a bundle, it arrives too early/late. You can try to change the blk variable, which is the target block. What better worked for me is sending the bundle 3 blocks ahead (blk + 3)

Header not found

This error happens when you send a bundle targeting a block that is not the next one (e.g: sending a bundle for the block 10 when the current block is 6 and it arrives when the block 8 is being formed)

Please simulate on top of the latest block!

This error is the opposite of header not found. It happens when you send a bundle target a block that was already mined (e.g: sending a bundle for the block 10 when the current block is 10 and it arrives when the block 13 is being formed)

Bundle is never accepted

Currently in polygon, the validators are choosen to validate 64 blocks in a row. This means that the validator 0x123 of the block n will be the same for the block n + 63.

A good approach would be to have a script that looks when a validator that integrates the bundle methods starts validating blocks, participating validators are 0x88c5e96c1459d224383dcb1fe0cedd1fcee25ffb and 0x742d13f0b2a19c823bdd362b16305e4704b97a38 and then start sending bundles, due to the fact that the next 63 block will also be validated by it uwu