Smart Contract Development
We design, build, and ship production-grade smart contracts for EVM chains and Solana. From ERC-20 tokens to complex DeFi protocols, our contracts are written for security, gas efficiency, and long-term maintainability — and every line ships audit-ready.
What we deliver
Token contracts
ERC-20, ERC-721, ERC-1155, SPL tokens with custom tax, vesting, anti-bot, and upgradeability logic.
DeFi protocols
AMMs, staking, lending, yield vaults, perps — built on battle-tested patterns and audited libraries.
NFT systems
Mint mechanics, royalties (EIP-2981), reveal flows, on-chain metadata, and marketplace integrations.
Custom on-chain logic
Governance, multi-sig, escrow, oracles, cross-chain bridges, and bespoke business rules.
Upgrades & migrations
UUPS / Transparent proxy patterns, storage-safe migrations, and on-chain state rescues.
Audit prep & remediation
We harden contracts for third-party audit and ship fixes for findings from yAudit, Spearbit, OpenZeppelin, and others.
Our process
Discovery & spec
We translate your idea into a concrete technical spec: state, functions, invariants, and threat model.
Architecture & estimates
You get a proposed architecture, gas budget, deployment plan, and a fixed-price quote.
Development & testing
Test-driven development with Foundry / Hardhat. 100% line coverage and invariant fuzzing on all critical paths.
Internal audit
Senior engineer reviews every line, runs Slither/Mythril, and signs off before handoff.
Deployment & verification
Mainnet deploy, source verification on Etherscan, and on-call support during launch.
Tech stack
Frequently asked questions
How much does smart contract development cost?+
A standard ERC-20 token starts at $2k. A full DeFi protocol typically runs $25k–$150k depending on complexity. We always quote fixed-price after the spec is locked.
How long does it take?+
Simple tokens ship in 3–5 days. Mid-size protocols (staking, vesting, NFT mint) take 2–4 weeks. Complex protocols 6–12 weeks.
Do you handle the audit?+
We harden the code and prep the audit package, then coordinate with top-tier auditors (yAudit, Spearbit, OpenZeppelin). We've shipped contracts that have passed audits from all of them.
Which chains do you support?+
All major EVM chains (Ethereum, Arbitrum, Optimism, Base, Polygon, BNB, Avalanche), plus Solana via Anchor.
Can you upgrade my existing contract?+
Yes — if it was deployed behind a proxy. If not, we can design a migration plan with state snapshots and a new deployment.
Related services
Ready to ship?
Tell us about your project. We'll reply within 24 hours with scope, timeline, and a fixed quote.
info@cryptohub.agency