This repository contains sample code for execution of "gasless" ERC-20 transfers. It makes use of Flashbots, sending bundles of two consecutive transactions: deposit transaction from special gas tank account to user account, and second transaction with actual ERC-20 transfer. Flashbots will ensure that both transaction are executed at the same time.
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Make sure that you have Node.js and Yarn installed.
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Install dependencies by running:
yarn
- Copy
example.envand rename it to.env. Then fill variables with actual values:
ALCHEMY_API_KEY - your Alchemy.com API key
GAS_TANK_PRIVATE_KEY - private key of gas tank account (should have ETH on balance)
USER_PRIVATE_KEY - private key of user account
TOKEN_ADDRESS - address of the ERC-20 token being transferred
RECIPIENT - address of the transfer recipient
TRANSFER_AMOUNT - amount of transfer in full units
BASE_GAS_PRICE - current gas price in gwei
- Execute transfer by running:
npm run start
- Wait for a minute, then check user's account Etherscan page for transactions