Certificate

# Web3 certificate - outline

## Part 1 - multiple choice + code reading (30 questions, 75 min)

Topics:
- Solidity types, storage layout, visibility, modifiers
- ERC-20, ERC-721, ERC-1155 mechanics
- Reentrancy, integer ops (Solidity 0.8+), signature replay, oracle risk
- Foundry testing: unit, fuzz, invariant
- Upgradeability: UUPS proxy, storage gaps, initialiser patterns
- Wallets, signatures, EIP-712 typed data

Passing mark: 70 percent.

## Part 2 - capstone (take-home, ~10 hours)

Build, test, and deploy a small contract suite:
- ERC-20 token with mint cap and pausable
- Vault that accepts deposits + withdrawals
- Foundry tests: unit + fuzz + at least one invariant test
- Slither run in CI with zero high-severity findings
- Deploy to Base Sepolia (or Sepolia), verify on Etherscan
- A minimal frontend (viem + wagmi) that connects and reads contract state

Submit a Git repo + deployed addresses + verified Etherscan links.

## Grading

- Correctness + security (40 percent): no high-severity Slither findings, no reentrancy
- Tests (25 percent): coverage > 90 percent, at least one passing invariant
- Deployment + verification (20 percent)
- Frontend integration (15 percent)

## Tips

- Use OpenZeppelin where you can - audited code beats clever code
- Foundry invariant tests are worth more than 100 unit tests
- Never deploy mainnet for this certificate; testnet only

// /certificate/web3