ERC-20 Staking Vault
Stake STK · earn more STK · ReentrancyGuard · 6 Hardhat tests
Contract overview
Two contracts:
StakeToken.sol— ERC-20 withonlyOwnermintStakingVault.sol—stake/withdraw/getReward
Rewards accrue at a per-second rate the owner sets with setRewardRate. Guards:
ReentrancyGuardon stake, withdraw, getReward- Balances and reward accounting update before token transfers
- Non-owners cannot change the reward rate
How the tests work
Run on the author’s machine with Hardhat’s local network (no wallet, no public RPC):
npm install npx hardhat test
Evidence re-ran 2026-09-09 (ET): 6 passing, 0 failing (~3s). Exit code 0. No private key used. No testnet or mainnet transaction.
What each of the 6 tests checks
| Test | Result |
|---|---|
| Stake records the balance before the transfer returns | pass |
| Withdraw above staked amount reverts | pass |
| Withdraw returns principal | pass |
| Rewards accrue after 100 seconds (~100 tokens at 1 token/s) | pass |
| Two equal stakers earn about the same | pass |
Non-owner cannot change rewardRate | pass |
Source layout: test/StakingVault.js · JSON evidence in repo results/tests.json.
Links
Open GitHub repo Back to labs indexAuthor: Harsha Nandhan Reddy Gajulapalli · MIT · harshanandhanreddy820@gmail.com