Time Capsule

A decentralized time capsule application built on Nibiru Chain that allows users to store messages and assets that can only be accessed after a specified time period.

Try the live demo

Architecture

1. CosmWasm Smart Contract

The smart contract handles:

• Message storage with time-locking mechanism
• Timestamp validation for unlocking
• State management using cw-storage-plus
• Query and execute message handling

Core Components:

• Rust-based contract logic
• CosmWasm framework
• WebAssembly compilation
• Integration tests with cw-multi-test

2. Frontend

Modern web application featuring:

• React with TypeScript
• TailwindCSS, Shadcn UI, MagicUI and KokonutUI components
• Leap wallet & Metamask integration
• Nibiru Chain JavaScript SDK (NibiJS)
• Real-time blockchain interaction
• Responsive design

3. Deployment on Nibiru Blockchain

• Contract deployed on Nibiru testnet: nibi1puyh8t2ypyj6776ndh5xm43pnwlrzlkx3qgp8lcdpx7rrctdyc7qup0h9z
• Frontend hosted on Vercel
• Leap wallet for transaction signing
• Support for Nibiru's testnet environment

Features

• Create time-locked message capsules
• Set unlock times using epoch timestamps
• View capsule status and metadata
• Retrieve messages after unlock time
• Owner-only message management

References

• CosmWasm Docs
• Nibiru Chain Docs
• Rust Docs