Local ERC-4337 Dev Environment

Quickstart steps

Before starting, create a file .env like in the example.

1. Install root dependencies

pnpm install

2. Run local hardhat node

pnpm run node

3. Run local bundler (this will also install required packages at first run)

pnpm run bundler

4. Deploy Entrypoint and Account factory contracts

pnpm run deployer

optional: use pnpm run bundler:deployer to have everything in the same terminal

5. Deploy and Fund Paymaster contracts. This will expose a POST / and GET /balances endpoints.

pnpm run paymaster

Test

To test an end-to-end sponsored user operation:

npx hardhat run scripts/mockUserop.ts