EIP4337 reference modules

Bundler

A basic eip4337 "bundler"

• expose a node with a minimal RPC calls:
  • eth_sendUserOperation to send a user operation
  • eth_supportedEntryPoints to report the bundler's supported entry points
  • eth_chainId

usage:

1. start hardhat-node with yarn hardhat-node or geth In another Window:
2. deploy contracts with yarn hardhat deploy --network localhost
3. run yarn run bundler --network localhost --mnemonic file so it will listen on port 3000
4. to run a simple test, do yarn run runop --deployDeployer --network localhost The runop script:
   • deploys a wallet deployer (if not already there)
   • creates a random signer (owner for wallet)
   • determines the wallet address, and funds it
   • sends a transaction (which also creates the wallet)
   • sends another transaction, on this existing wallet
   • (uses account[0] or mnemonic file for funding, and creating deployer if needed)

sdk

SDK to create and send UserOperations see SDK Readme

utils

internal utility methods/test contracts, used by other packages.