I build the contract layer for DeFi / RWA / NFT projects — upgradeable, tested, audit-ready. No vague promises: every contract ships with fuzz tests and invariants you can run yourself.
Pricing: Fixed Project Rate (USD)
Audit-Ready Contract – $700
One UUPS-upgradeable contract (staking / payouts / NFT drop), OpenZeppelin, Ownable2Step + roles, Foundry unit + fuzz tests, deploy script.
Automated Protocol – $1,800
Contract + Chainlink Automation (scheduled on-chain upkeep), solvency invariant testing, testnet deploy, minimal wallet-connect demo front-end.
Cross-Chain System – $4,500
Multi-contract system with Chainlink CCIP (cross-chain messaging), full Foundry test suite + invariants, Natspec docs, deploy scripts and handover.
Contact me for a custom quote if your project has unique requirements.
My Tech Stack:
Solidity, Foundry, OpenZeppelin, UUPS proxies, Chainlink Automation & CCIP, Ownable2Step / role-based access, fuzz + invariant testing, web3.py / ethers.js read layer, deploy scripting.
Example Project:
merklio-stake-vault — a UUPS liquid-staking vault releasing rewards via Chainlink Automation and reporting state cross-chain via Chainlink CCIP. 18 tests + a solvency invariant (64×2048 calls, 0 reverts), all green. Public source: github.com/Fexixreturn/merklio-stake-vault — verify it yourself.
Payment in USDT. Let's discuss your project — I'll reply within a few hours.
