Money Pot

Problem Statement

Money Pot is the first brain-powered payment and savings protocol that lets users create secure "pots" of PYUSD (PayPal USD stablecoin), protected by a revolutionary one-letter, zero-knowledge authentication system called 1P. Instead of remembering complex passwords or managing seed phrases, users simply remember a single letter stored only in their minds.How it works:Create Pots: Users deposit PYUSD into smart contract "pots" secured by their brain-based 1-letter passwordInteractive Gaming: Others can attempt to unlock pots by solving the 1P challenge for entry fees, creating a skill-based earning ecosystemDual Payment Rails: Support both PYUSD stablecoin and native ETH payments via Pyth oracle price feedsExplorer Integration: Real-time transaction tracking via Blockscout SDK with instant notificationsCore Features:Zero-Knowledge Auth: Quantum-resistant, brain-only passwords with no storage or transmissionPYUSD Native: Leveraging PayPal's $1B+ market cap stablecoin for mainstream accessibilityMulti-Currency Support: Pay entry fees in PYUSD or ETH with live Pyth oracle conversionsGamified Savings: Pot creators earn 50% of entry fees; winners claim 40% of pot valueExplorer-First UX: Blockscout SDK integration for transaction toasts and history trackingAuto-Expiry: Unclaimed pots return funds to creators after configurable timeoutsUse Cases:Secure Savings: Brain-powered "piggy banks" immune to phishing and device theftCommunity Challenges: Skill-based earning games with provable fairnessP2P Gifting: Send PYUSD pots with brain-based access codesTravel Wallets: Create temporary pots without exposing cold walletsSocial Gaming: Influencers can monetize follower engagement through pot challengesMoney Pot bridges traditional payments (via PYUSD) with cutting-edge Web3 security (ZK auth) to create the first truly brain-powered fintech platform.

Solution

Tech Stack:Smart Contracts: Solidity + Hardhat 3 deployed on Sepolia testnetStablecoin: PYUSD (PayPal USD) ERC-20 integration with OpenZeppelin SafeERC20Price Oracle: Pyth Network oracle for real-time ETH/USD conversions, enabling native token paymentsExplorer SDK: Blockscout App SDK for transaction toasts, history popups, and tx interpretationFrontend: React + ethers.js with Blockscout SDK hooks (useNotification, useHistory)Security: OpenZeppelin ReentrancyGuard, custom access controls, time-locked expirationsArchitecture:Smart Contract Layer (Hardhat 3): Built on Solidity 0.8.20+ with modular design:MoneyPotManager.sol: Core pot creation, attempts, payoutsPYUSD token integration via constructor-injected ERC-20 address (no hardcoding)Pyth oracle integration for multi-currency entry fees (PYUSD or ETH)Event emissions for Blockscout SDK tracking (PotCreated, PotAttempted, PotSolved)Oracle Integration (Pyth Network):Real-time ETH/USD price feeds from Pyth's on-chain oracleDynamic entry fee calculation: users can pay in PYUSD or equivalent ETH valueFallback mechanisms for oracle downtimeGas-optimized price updates with configurable staleness toleranceExplorer Integration (Blockscout SDK - Prize Track): This is where Money Pot shines for the Blockscout bounty:NotificationProvider wraps entire app for global transaction stateuseNotification hook displays pending/success/error transaction toastsuseHistory popup shows recent pot creations, attempts, and wins per addressTransaction interpretation layer translates complex pot interactions into human-readable summariesMobile-responsive design for on-the-go pot gamingPYUSD Integration:Leveraging PayPal's $2.6B+ market cap stablecoin for mainstream appealTestnet faucet access for developers (free PYUSD for testing)ERC-20 standard compliance enables seamless wallet integrationsPosition Money Pot as first PYUSD-native gaming protocol1P Protocol (Brain-Based Auth):Off-chain verification service generates color-grid challengesUsers submit directional inputs (Up/Down/Left/Right) based on password positionZero-knowledge: password never transmitted or stored on-chainFixed difficulty (3 rounds) for MVP; roadmap includes adaptive ZK circuitsOracle-signed success proofs trigger on-chain payoutsNotable Hacks & Innovations:Hacky Brilliance #1 - Dual Currency Entry Fees: Instead of forcing PYUSD-only, we integrated Pyth oracle to accept ETH payments at live exchange rates. This required custom attemptPotWithETH() function that:Fetches current ETH/USD price from PythCalculates equivalent PYUSD fee in weiValidates msg.value matches conversionWraps native ETH into WETH → swaps to PYUSD (future: DEX integration)Processes attempt with unified PYUSD logicHacky Brilliance #2 - Blockscout SDK Deep Integration: We didn't just add transaction notifications - we created pot-specific interpretations:Custom transaction parser translates createPot() into "New $X pot created - expires in Y days"Attempt transactions show "Hunter attempted pot #Z - paid $A fee"Win notifications trigger confetti animation + explorer linkAll tied to Blockscout's real-time indexing for instant feedbackHacky Brilliance #3 - PYUSD Reserve Optimization: Since PYUSD is backed 1:1 by USD deposits and treasuries, we implemented:Interest accrual tracking for platform-held PYUSD (future feature)Dynamic fee redistribution based on pot duration (longer pots = lower platform cut)Gas-efficient batch transfers using OpenZeppelin's multicall patternsPartner Technology Benefits:Pyth Oracle:Enabled multi-currency UX without trusted price feedsSub-second price updates for fair entry fee calculationsCross-chain compatibility for future expansionBlockscout SDK:Transformed complex contract interactions into intuitive UXEliminated need for separate block explorer tabsMobile-first notifications boosted user engagementReal-time tx interpretation = instant gratification for gamersPYUSD Stablecoin:Instant mainstream credibility (PayPal brand)Stable value eliminates crypto volatility concernsEasy fiat on/off-ramps via PayPal ecosystemRegulatory clarity (Paxos-issued, NYDFS oversight)Hardhat 3:Local forking enabled PYUSD integration testing without testnet limitsBuilt-in Sepolia deployment scripts with verificationGas reporting optimized contract efficiency (under 2M gas per pot)Plugin ecosystem accelerated development (hardhat-deploy, hardhat-etherscan)OpenZeppelin:Battle-tested security patterns prevented reentrancy attacksSafeERC20 eliminated token transfer edge casesOwnable + ReentrancyGuard = production-ready contracts in daysUpgradeability patterns ready for mainnet migration