NFT Staking Contracts

Hard staking and soft staking for ERC-721 NFTs. Built with Foundry, Solidity 0.8.24, OpenZeppelin v5.

Hard vs Soft

	Hard Staking	Soft Staking
NFT custody	Transfers to contract	Stays in your wallet
Ownership check	Implicit	ownerOf() on every action
Claim if NFT sold	N/A	Reverts with OwnershipLost
Unstake if NFT sold	N/A	Succeeds, pays checkpointed rewards only

Structure

src/
  interfaces/IStaking.sol   — shared interface, StakeInfo struct, events
  HardStaking.sol           — custody-based staking
  SoftStaking.sol           — non-custodial staking
  RewardToken.sol           — ERC-20 reward token, minter role
  MockNFT.sol               — test ERC-721
test/
  HardStaking.t.sol
  SoftStaking.t.sol

See PATTERNS.md for design decisions and optimisation notes.

Usage

forge build
forge test -vvv
forge test --gas-report
forge test --match-contract HardStakingTest
forge test --match-contract SoftStakingTest