WorkSons of Evil
Smart contracts for NFT collection
ERC721 smart contracts for 666 NFT collection with phased minting system and Merkle whitelists.
- Client
- Sons of Evil
- Year
- Service
- Smart contract development
Overview
Successful NFT collections require a fair minting system that rewards the early community while maintaining accessibility. Sons of Evil implements four sale phases with different access levels.
The whitelist system uses Merkle Trees for gas-efficient on-chain verification, allowing thousands of addresses in the whitelist without increasing transaction costs.
What we did
- Solidity
- Hardhat
- OpenZeppelin
- Merkle Trees
- ERC721
- ERC2981
- Total NFTs
- 666
- Minting phases
- 4
- ETH per mint
- 0.03
- Per wallet
- 1
Phase system
Each phase has its configurable timestamp: Team Mint reserves 66 NFTs for the team, GTD allows guaranteed minting to the Demon List, FCFS opens Zurak's List in first-come-first-served mode, and finally Public opens to everyone.
Timestamps are updatable before finalizing the contract, allowing schedule adjustments according to launch needs.
Reveal and metadata
The contract supports dynamic reveal: initially all tokens point to a placeholder, and at reveal time the baseURI is updated to show final metadata stored on IPFS.
ERC2981 royalties allow configuring default and individual percentages per token, guaranteeing secondary income on compatible marketplaces.
