Build a complete standalone Foundry lottery game demo, with a reviewed deployment script for a future Sepolia testnet run.

Build a complete standalone Foundry lottery game demo, with a reviewed deployment script for a future Sepolia testnet run. Implement paid ticket entry, bounded rounds with an entry deadline, asynchronous winner selection, pull-based prize claims, and timeout refunds when randomness cannot be fulfilled.

Use an explicitly labelled local/testnet randomness mock behind a coordinator interface; only the coordinator may fulfil a pending draw, and duplicate or late fulfilments must be handled safely. This mock is not production randomness. Document ticket pricing, round transitions, permissions, who closes rounds, how claims/refunds are triggered, and the real verifiable-randomness integration still required.

Include meaningful success and failure tests for entry, deadline boundaries, round closure, authenticated fulfilment, duplicate actions, payout/refund accounting, failed payments, reentrancy, and conservation of funds. Deliver src/, test/, foundry.toml, a README with local play-through commands, and a deployment script whose addresses/parameters come from explicit configuration.

The repository must build, test, and format-check offline with the verifier's Foundry toolchain; vendor any needed dependencies as ordinary files and do not enable ffi, filesystem permissions, or a custom compiler. Write artifacts/report.md with the architecture, test results, deployment parameters, and remaining work before a real-money launch. Do not broadcast transactions, access funded wallets or private keys, or emit the Uniswap-specific launch.json.

Build the project and deployment instructions in this assignment; the independent reviewer then checks the implementation and tests, including the deployment script.