NFT Smart Contract Development (ERC-721 & ERC-1155)

We deliver complete ERC-721 and ERC-1155 implementations, including core mint, transfer, approve functions, plus metadata and enumeration extensions for ERC-721. For ERC-1155, we provide batch operations and accurate multi-token balance accounting within a single contract.

Choose the best approach for your project: on-chain or off-chain metadata. We enable dynamic URI updates and integrate with popular storage solutions like IPFS, Arweave, or your own infrastructure.

We implement batch minting, lazy minting, bitmap accounting, and other proven patterns — saving up to 50% gas on large-scale operations and significantly lowering transaction costs.

We automate post-mint listing for OpenSea, Rarible, LooksRare, and other marketplaces. We also deliver a smooth UX for MetaMask, WalletConnect, Coinbase Wallet, and RainbowKit connections.

We build fixed-price sales, English and Dutch auctions with dynamic pricing, presales and whitelist access via Merkle trees, plus lotteries and randomized drops to gamify your collection.

We run static analysis (Slither, MythX), dynamic fuzz testing (Echidna, Foundry), formal verification for critical modules, and involve third-party auditors. We also set up CI/CD with automated tests and production monitoring.