Flash-Loan and Front-Running Exploits
Implemented 100-block minimum commitment windows per token ID, preventing same-block stake-attack-unstake arbitrage.
Advanced NFT Card Combination System
Dual-Layer Dynamic NFT Fusion & Reversible Staking Engine
Source codeThe engineering problem.
Standard GameFi card systems force players into irreversible burn mechanics that destroy asset liquidity, while flash-loan bots exploit instant unstake cycles to manipulate leaderboards.
Overview
An advanced ERC-721 GameFi protocol that allows players to either permanently burn cards to mint higher-tier rarity NFTs or temporarily lock base cards into a reversible fusion staking vault to generate amplified battle power without losing underlying asset ownership.
- Cooldown Delay
- 100 Blocks
- Crafting Efficiency
- +40% Gas
- Token Standard
- ERC-721
Dual-Engine Card Vault & Cooldown Registry
Separates permanent crafting mechanics from temporary staking pools, governed by a block-number state registry.
Architecture / GameFi / Smart Contracts
CraftingEngine.sol: Verifies valid 3-card recipe combinations and executes atomic burning before minting upgraded metadata.
Technical challenges & mitigations.
Gas Optimization for Batch Combinations
Utilized bitwise flags for rarity attributes instead of storage string lookups, cutting crafting execution cost by 40%.
Key features.
- 01Dual-mode card mechanics: Permanent Burn vs Reversible Fusion
- 02On-chain deterministic pseudo-random attribute generation
- 03Cooldown mapping protecting leaderboard integrity
- 04Gas-efficient storage packing for card metadata
Next study / 03