1. Executive Summary
Agarthi: The LI:LY–Sandbox Bridge is a Web3 integration project connecting the LI:LY DApp (Polygon) with The Sandbox to create a two-way flow of value between the two platforms.
The narrative experience Agarthi: The Hope of Lily becomes a gateway for Sandbox users into LI:LY’s ecosystem, while LI:LY’s existing Polygon community can directly access the game and Sandbox experiences using their existing wallets.
Main Goal:
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Synchronize NFT collectibles and player data between LI:LY (Polygon) and The Sandbox.
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Enable in-game unlocks in The Sandbox based on LI:LY on-chain assets.
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Host cross-platform events with leaderboards and rewards in both SAND and Polygon NFTs.
Benefits:
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Onboards LI:LY’s active Polygon community into The Sandbox.
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Extends the visibility and utility of Sandbox assets into an external Web3 platform.
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Demonstrates a working model of NFT interoperability across two ecosystems.
2. Problem Statement
Currently, narrative experiences in The Sandbox are siloed:
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In-game NFTs often have no function outside the Sandbox environment.
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Strong Web3 communities like LI:LY, with rich lore and user engagement, lack a direct bridge to The Sandbox metaverse.
This limits interoperability and cross-platform adoption:
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Sandbox users never discover the depth of LI:LY’s story and collectibles.
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NFTs generated in-game remain trapped within one ecosystem.
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External communities lack motivation to engage with assets that cannot travel between worlds.
3. Proposed Solution
A Polygon ↔ Sandbox bridge that:
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Synchronizes NFTs and narrative items
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Collectibles earned in Agarthi (petal, cube, backpack, voice recordings) are also minted as Polygon NFTs within LI:LY.
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LI:LY NFTs unlock bonus in-game content in The Sandbox (skins, asset variants, bonus areas).
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Cross-platform leaderboards
- Scores and game progress from The Sandbox are pushed on-chain to Polygon smart contracts and displayed inside the LI:LY DApp.
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Interoperable events
- Seasonal challenges with mixed rewards: Polygon NFTs + SAND prizes.
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Unified wallet access
- Log into Sandbox experiences using an existing LI:LY Polygon wallet connection via WalletConnect.
Key Technologies:
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Polygon smart contracts for NFT minting, burning, and metadata sync.
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Sandbox API & Game Maker scripting for on-chain data handling.
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WalletConnect for unified cross-platform login.
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IPFS for shared metadata storage.
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Event webhooks for real-time leaderboard synchronization.
4. Team
| Name | Role | Relevant Expertise | |
|---|---|---|---|
| Leonardo Donati | Game Designer | Specialist in narrative design and level creation in Game Maker. | |
| Francesco D’Agliano | Sales Manager | Expert in NFT economy design and strategic partnerships. | |
| Edoardo Pisaneschi | Marketing Manager | Experienced in cross-chain growth campaigns and Web3 onboarding. | |
| Abhishek Chauhan | Dev Director | 6+ years in blockchain integration; Polygon, smart contracts, API/game connections. |
Relevant Contributions:
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LI:LY DApp on Polygon with an active user base.
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Previous integrations of Web3 APIs into indie games.
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Cross-metaverse event collaborations (Decentraland, Spatial).
5. Technical Details
Integration Type:
- NFT & player data sync between Polygon and The Sandbox.
Standards:
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ERC-721 for unique collectibles.
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ERC-1155 for event-based multi-assets.
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IPFS metadata for interoperability.
Libraries/Tools:
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Sandbox Game Maker API.
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Polygon SDK + Hardhat for smart contracts.
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WalletConnect for login.
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Node.js middleware for event handling.
On-Chain:
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Cross-platform NFT mint/burn.
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On-chain leaderboard updates.
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Game progress recording.
6. Budget & Work Plan
| Category | Amount (USD) | Notes |
|---|---|---|
| Smart Contract Development | $6,000 | NFT mint/burn, Polygon↔Sandbox sync |
| API & Middleware | $4,000 | Bridge for data/leaderboard sync |
| Game Maker Integration | $5,000 | Scripts to connect to smart contracts |
| QA & Cross-Platform Testing | $3,000 | Polygon mainnet + Sandbox testing |
| Documentation & Tutorials | $2,000 | Creator/user guides |
| Cross-Platform Marketing | $5,000 | Launch campaigns & inaugural event |
| Total | $25,000 |
Milestones:
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Bridge MVP & Smart Contracts – Week 4 (20%)
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Game Maker + API Integration – Week 8 (30%)
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Cross-Platform Beta Test – Week 10 (20%)
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Public Launch + Seasonal Event – Week 12 (30%)
7. DAO Alignment & Impact Measurement
Alignment:
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Implements SIP-25 vision for interoperability between Web3 ecosystems.
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Increases exposure for Sandbox assets in external Web3 platforms (LI:LY on Polygon).
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Strengthens retention through cross-platform events and dual rewards.
KPIs:
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≥ 1,000 NFTs synced Polygon↔Sandbox within 30 days of launch.
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≥ 2,000 unique users entering Sandbox via Polygon wallet.
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≥ 10 cross-platform events hosted in Year 1.
Here a simple scheme of our idea. We are glad to share more datails.
- How did you hear about the Sandbox DAO Grants Program? → Using Questbook and after 2 Years studying your courses and lessons in MasterZ .