DeFi Pro League

Problem Statement

DeFi Pro League turns decentralized finance into an interactive e-sport. It’s a competitive trading platform where traders face off in real-time, while spectators participate by staking, tipping, and influencing outcomes — all transparently on-chain.🎯 MissionTo make DeFi accessible, exciting, and community-driven through skill-based 1v1 trading competitions that showcase real on-chain performance and protocol composability.🌟 How It WorksMatch FlowSetup Phase: Two traders register, each with 10,000 PYUSD.Quarters (1–4): 30-minute trading rounds.Scoring Phase: Portfolio values calculated each quarter.Victory: First to win 3 quarters becomes the champion.Audience ParticipationSpectators stake PYUSD → receive GameCoin.Use GameCoin to tip or power-up traders in real time.Tips are converted to PYUSD in the player’s vault for trading.All actions and effects are visible and verifiable on-chain.Traders: Compete head-to-head with equal starting capital (10,000 PYUSD) across four 30-minute quarters. Every trade, swap, and yield strategy is executed on-chain and scored transparently via Envio indexer.Spectators: Convert PYUSD to GameCoin (100:1 ratio) to back their favorite trader, send tips, or boost capital in real time. Every interaction directly affects gameplay.Smart Contracts: Manage player vaults, audience staking, and real-time scoring on Ethereum Sepolia Testnet, built with Solidity, Hardhat 3.0, Next.js 14, and Tailwind CSS.💎 Key ValueFor Traders: Prove skill, build reputation, and trade risk-free with provided capital.For Spectators: Participate, learn, and influence live matches through DeFi mechanics.For DeFi Ecosystem: Boost adoption by making on-chain finance engaging, educational, and transparent.💎 Sponsors & Technology PartnersPayPal PYUSD:Official stablecoin for competitions6-decimal precision for fair, efficient tradingRegulated and trusted asset for DeFiEnvio:Provides real-time blockchain indexingEnables instant portfolio tracking and transparent scoringHardhat:Smart contract development and deploymentTesting and simulation environment🎯 Use CasesDeFi Marketing Campaigns: Showcase integrations via competitions.Community Events: Host league-style tournaments.Education: Teach trading and risk management interactively.Content Creation: Stream matches for influencers or DeFi educators.Protocol Testing: Evaluate performance under live conditions.🌐 Future RoadmapExpand to multi-player tournaments and seasonal leagues.Mainnet deployment after testnet optimization.Support for multi-asset trading beyond PYUSD.Integrate advanced DeFi instruments (options, lending, derivatives).Launch DAO-based governance for rule voting.Develop native mobile apps and integrated streaming.

Solution

DeFi Pro League🎯 Tech Stack OverviewDeFi Pro League combines three powerful technologies to create transparent, competitive on-chain trading: Hardhat 3.0 for smart contract development, PayPal PYUSD as the competition currency and prize payments, and Envio for real-time blockchain indexing.⚒️ Hardhat 3.0 - Development EngineSmart Contracts Built:6 Solidity contracts (~1,500 LOC) managing game flow, player vaults, yield strategies, and spectator engagementState machine with 9 phases: 4 trading quarters + 4 settle periods + completionERC4626 vault integration for yield-bearing positionsWhy Hardhat 3.0:TypeScript-native development - Better DX and type safetyHardhat Ignition - Manages complex multi-contract deployments with dependenciesEDR (Ethereum Development Runtime) - Lightning-fast tests (<1 second for full suite)Time manipulation - Test 30-minute quarters instantly: evm_increaseTime + evm_mineDeployment: // Hardhat Ignition handles dependency order automatically buildModule("CryptoArena", (m) => { const pyusd = m.contract("MockPyUSD"); const gameManager = m.contract("GameManager", [pyusd, playerA, playerB, ...]); const gameCoin = m.contract("GameCoin", [gameManager]); const vault = m.contract("FastStakeVault", [gameManager, pyusd, 500]); return { gameManager, gameCoin, vault }; });💎 PayPal PYUSD - Competition CurrencyIntegration:Each player receives 10,000 PYUSD per quarter (40k total per match)Spectators stake PYUSD → get GameCoin (100:1 ratio) → tip playersAll scoring calculated in PYUSD for transparent, dollar-denominated resultsTechnical Challenge - Decimal Precision: PYUSD uses 6 decimals (vs standard 18). Required careful conversion throughout:// Convert PYUSD (6 decimals) to GameCoin (18 decimals) // Missing 1e12: 500 PYUSD → 0.00000005 GameCoin ❌ // With 1e12: 500 PYUSD → 50,000 GameCoin ✅gameCoinAmount = pyusdAmount * 100 * 1e12; // Scale factor critical!Applied decimal scaling in 10+ locations: token minting, vault shares, portfolio calculations, and conversions.Why PYUSD:✅ Trusted, regulated stablecoin✅ Perfect for competition scoring (stable value)✅ Bridges TradFi and DeFi audiences📊 Envio - Real-Time IndexingThe Problem: Blockchain queries are slow and can't track complex wallet activity efficiently.Envio Solution:Sub-second portfolio updates via GraphQL APIIndexes all player transactions, swaps, deposits, withdrawalsNo custom backend needed - query Envio directly from frontendImplementation:Track all relevant eventsevents: - Transfer → portfolio balances - Swap → DEX trades - Deposit/Withdraw → vault positions// Frontend: Real-time portfolio via Envio GraphQL const { data } = useQuery(GET_PORTFOLIO, { variables: { playerAddress, competitionId }, pollInterval: 1000 // Updates every second });Features Powered by Envio:✅ Live portfolio tracking (<1s latency)✅ Transaction history and audit trails✅ Performance charts and analytics✅ Leaderboards and rankings🏗️ Architecture HighlightsSmart Contract SystemGameManager (orchestrates everything) ├── PlayerVaultA (isolated trading) ├── PlayerVaultB (isolated trading) ├── FastStakeVault (ERC4626 yield) ├── StrategyRouter (DeFi routing) ├── AudienceModule (spectator engagement) └── GameCoin (ERC20 rewards)Game FlowSetup → Q1 (30min) → Settle → Q2 → Settle → Q3 → Settle → Q4 → Settle → WinnerFrontend StackNext.js 14 + React + TypeScriptWagmi v2 - Ethereum interactionsTailwind CSS - StylingEnvio GraphQL - Real-time data💡 Key Technical AchievementsDecimal Precision Engineering Solved PYUSD (6 decimals) ↔ ERC20 (18 decimals) conversions across entire protocol with explicit 1e12 scaling.Hardhat Ignition Deployment Managed circular dependencies between 6+ contracts using two-phase deployment pattern.Time-Based Testing Used Hardhat's EVM manipulation to test 30-minute quarters in milliseconds: await ethers.provider.send("evm_increaseTime", [1800]);Real-Time State Sync Combined Wagmi (writes) + Envio (reads) for instant UI updates after blockchain transactions.🎯 Technology SynergyHardhat 3.0 → Build and test fastPYUSD → Stable, trusted currencyEnvio → Real-time visibilityResult: A competitive trading platform that's:Fast to develop (Hardhat)Safe to use (PYUSD)Exciting to watch (Envio)📊 Stats16 tests running in <1 second (Hardhat EDR)10+ decimal conversions handling PYUSD precision<1 second latency for portfolio updates (Envio)100% on-chain transparent gameplay6 smart contracts working in harmony