I will build a Solidity smart contract with Foundry tests (UUPS, audits-ready)

I write and test production-grade Solidity smart contracts — UUPS-upgradeable patterns, security-first design, full Foundry test coverage.

What you get:

✅ ERC-20 / 721 / 2981, vaults, staking, payroll/streaming, custom logic

✅ UUPS upgradeable proxies, Ownable2Step, role-based access

✅ CEI ordering, reentrancy guards, SafeERC20 — security-first patterns

✅ Foundry unit + fuzz + invariant tests, gas-optimized storage

✅ Deploy scripts, Natspec docs, full source code

Public sample: github.com/Fexixreturn/merklio-stake-vault (UUPS vault, 18 tests + solvency invariant, all green). Payment in USDT.

Requirements: contract spec / what it should do, target chain.