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calendefi

Your Calendar is Now a Wallet | “Schedule payments like meetings. Approve transactions like RSVPs."

Problem Statement

CalendeFi - ETHGlobal Project DescriptionProblemDeFi adoption is hindered by complex interfaces and steep learning curves.Current crypto wallets require users to:Navigate unfamiliar dApp interfaces with poor UX patternsManually execute transactions at specific times without built-in schedulingCoordinate group transactions through fragmented communication channelsSwitch between multiple applications for calendar management and crypto operationsLearn entirely new interaction paradigms that don't leverage existing digital habitsThe result?Millions of users who are comfortable with calendar applications remain excluded from DeFi opportunities due to technical barriers and poor user experience.SolutionCalendeFi transforms any Google Calendar into a powerful, intent-based DeFi orchestration layer.Instead of learning new interfaces, users leverage the familiar calendar paradigm they already use daily. By simply creating calendar events with specific titles, users can:Execute scheduled payment intents across multiple protocolsConnect to any dApp through WalletConnect v2 integrationSettle USD payments via PayPal USD (PYUSD)Create swaps and limit orders on Uniswap DEXEnable multisig approval through calendar RSVP votingIssue ENS subnames for calendar-based identity managementThe innovation:We've created the first intent-based calendar-native DeFi orchestration platform, making cryptocurrency operations as simple as scheduling a meeting.How It WorksCalendar Event Creation & Intent ParsingUser creates calendar event → Google Calendar API → Payment Intent EngineNatural Language Processing: "Send 5 ETH to fabianferno.eth tomorrow at 2pm"Intent Classification: Determines transaction type (transfer, swap, dApp connection)Parameter Extraction: Amount, recipient, timing, approval requirementsMulti-Protocol Intent RoutingPayment Intents → Protocol Router → [PayPal USD | Uniswap | WalletConnect | EVM Direct]PayPal USD IntegrationFiat-Crypto Bridge: Seamless USD settlement through PYUSDReal-world Payments: "Pay $100 to contractor@company.com"Cross-border Transfers: Instant international settlementsUniswap DEX IntegrationAutomated Swaps: "Swap 10 USDC to ETH at 3pm"Limit Orders: "Buy ETH when price drops to $2000"Liquidity Management: Scheduled LP position managementWalletConnect v2 IntegrationUniversal dApp Access: Connect to any Web3 applicationSession Management: Persistent connections through calendar eventsApproval Workflows: RSVP-based connection authorizationScheduled Intent ExecutionScheduled Intents → Execution Engine → EVM Networks (Multi-chain)Precise Timing: Execute at exact calendar event timesGas Optimization: Dynamic gas price estimationCross-chain Support: Ethereum, Polygon, Arbitrum, BaseMultisig Approval via RSVPCalendar Invites → RSVP Tracking → Approval Threshold → Execute/RejectDemocratic Governance: Calendar attendees become transaction approversFlexible Thresholds: Configurable approval percentages (50%, 66%, 100%)Real-time Voting: Live RSVP tracking with automatic executionENS Identity IntegrationCalendar Identity → ENS Subname Issuance → Decentralized IdentityCalendar-Native Identity: Auto-generate ENS subnames for calendarsHuman-readable Addresses:alice.calendefi.ethinstead of0x742d35...Identity Persistence: Consistent identity across sessionsKey FeaturesIntent-Based ArchitectureNatural Language Processing: Parse complex transaction intents from calendar titlesMulti-Protocol Routing: Intelligent routing to optimal execution pathsScheduled Execution: Precise timing based on calendar eventsConditional Logic: "If ETH > $3000, swap 10 ETH to USDC"Traditional Finance BridgePayPal USD Integration: Direct fiat settlement through PYUSDReal-world Payments: Pay contractors, vendors, services in USDCross-border Transfers: Instant international money movementBanking Interface: Familiar payment patterns for Web2 usersUniversal dApp ConnectivityWalletConnect v2: Connect to any Web3 application seamlesslySession Persistence: Maintain connections across calendar sessionsApproval Workflows: Democratic approval for dApp connectionsSecurity Controls: Granular permission managementAdvanced DeFi OperationsAutomated Swaps: Schedule token exchanges at optimal timesLimit Orders: Set price-triggered swap conditionsLiquidity Management: Automated LP position managementYield Optimization: Scheduled rebalancing across protocolsSecurity & GovernanceMultisig via RSVP: Democratic transaction approvalDeterministic Wallets: Reproducible, secure wallet generationNo Key Storage: Private keys generated on-demand onlyTransaction Validation: Pre-execution safety checksIdentity & InteroperabilityENS Integration: Calendar-based decentralized identityCross-chain Support: Multi-EVM network compatibilityProtocol Abstraction: Unified interface across DeFi protocolsWeb2-Web3 Bridge: Seamless traditional-to-crypto workflowsFuture ScopeShort-term (3-6 months)AI-Powered Intent Recognition: Advanced NLP for complex transaction parsingMore Protocol Integrations: Aave, Compound, Curve, 1inchAdvanced Scheduling: Recurring payments, conditional executionMobile-First Interface: Progressive Web App with native feelMedium-term (6-12 months)Enterprise Treasury Management: Corporate multi-sig workflowsSmart Contract Automation: Deploy and manage contracts via calendarCross-chain Intent Routing: Optimal execution across multiple chainsAI Trading Assistant: Intelligent market analysis and suggestionsLong-term (12+ months)Calendar-Native DeFi Protocol: Native blockchain for calendar operationsIntent Marketplace: Trade and share complex transaction intentsDAO-as-a-Calendar: Governance through calendar-based votingRegulatory Compliance: KYC/AML integration for institutional adoptionVision: The Intent-Based Calendar EconomyCalendar Standards: Open protocols for calendar-blockchain integrationIntent Infrastructure: Decentralized intent execution networkSocial Finance: Community-driven financial coordinationAutonomous Organizations: Calendar-governed DAOs and protocolsETHGlobal ImpactCalendeFi introduces a new paradigm: Intent-Based Calendar Finance.By transforming familiar calendar interactions into sophisticated DeFi operations, we're solving the critical UX barrier that has prevented mainstream adoption.Technical Innovation:Intent-Based Architecture: First calendar-native intent parsing and execution systemMulti-Protocol Orchestration: Unified interface across PayPal, Uniswap, WalletConnectRSVP-Based Multisig: Novel governance mechanism using calendar responsesCalendar-ENS Integration: Decentralized identity through calendar ownershipMarket Disruption:$2.5T+ Traditional Finance: Bridge to existing financial workflows2B+ Calendar Users: Massive addressable market of familiar interface usersNew Category Creation: "Calendar-Native Financial Infrastructure"Enterprise Adoption: Corporate treasury management revolutionOpen Source Ecosystem:Modular Architecture: Reusable components for calendar-blockchain projectsProtocol Standards: Open specifications for calendar-DeFi integrationDeveloper Tools: SDK for building calendar-native financial applicationsCommunity Governance: Decentralized development through calendar votingReal-World Impact:Financial Inclusion: Bring DeFi to non-technical users through familiar UXCorporate Adoption: Enable enterprises to leverage DeFi through existing toolsGlobal Payments: Instant, low-cost international transfers via calendarDemocratic Finance: Community-governed financial operationsCalendeFi isn't just a wallet - it's the operating system for intent-based, calendar-native finance.From scheduling meetings to orchestrating the future of finance.

Solution

🔧 How It Works (Based on Architecture)1. Calendar Event Creation & Intent Parsing User creates calendar event → Google Calendar API → Payment Intent EngineNatural Language Processing: "Send 5 ETH to fabianferno.eth tomorrow at 2pm" Intent Classification: Determines transaction type (transfer, swap, dApp connection) Parameter Extraction: Amount, recipient, timing, approval requirements 2. Multi-Protocol Intent Routing Payment Intents → Protocol Router → [PayPal USD | Uniswap | WalletConnect | EVM Direct]🏦 PayPal USD IntegrationFiat-Crypto Bridge: Seamless USD settlement through PYUSD Real-world Payments: "Pay $100 to contractor@company.com" Cross-border Transfers: Instant international settlements 🦄 Uniswap DEX IntegrationAutomated Swaps: "Swap 10 USDC to ETH at 3pm" Limit Orders: "Buy ETH when price drops to $2000" Liquidity Management: Scheduled LP position management 🔗 WalletConnect v2 IntegrationUniversal dApp Access: Connect to any Web3 application Session Management: Persistent connections through calendar events Approval Workflows: RSVP-based connection authorization 3. Scheduled Intent Execution Scheduled Intents → Execution Engine → EVM Networks (Multi-chain)Precise Timing: Execute at exact calendar event times Gas Optimization: Dynamic gas price estimation Cross-chain Support: Ethereum, Polygon, Arbitrum, Base 4. Multisig Approval via RSVP Calendar Invites → RSVP Tracking → Approval Threshold → Execute/RejectDemocratic Governance: Calendar attendees become transaction approvers Flexible Thresholds: Configurable approval percentages (50%, 66%, 100%) Real-time Voting: Live RSVP tracking with automatic execution 5. ENS Subname Integration Calendar Identity → ENS Subname Issuance → Decentralized IdentityCalendar-Native Identity: Auto-generate ENS subnames for calendars Human-readable Addresses: alice.calendefi.eth instead of 0x742d35... Identity Persistence: Consistent identity across sessions

Hackathon

ETHGlobal New Delhi

2025

Prizes

  • 🏆

    🏆 ETHGlobal New Delhi 2025 Finalist

    ETHGlobal

  • 🏆

    Most creative use of ENS 3rd place

    ENS

Contributors