LifeVault

LifeVault is a non-custodial inheritance and savings protocol built on Arbitrum Sepolia using Arbitrum Stylus (Rust).

It addresses two core issues in asset management: preventing premature liquidation of savings (Diamond Hands) and ensuring asset continuity in the event of loss of access or death (Legacy Protocol).

Features

1. Diamond Vault (Time-Locked Savings)

Users lock ETH for a pre-defined duration to enforce disciplined saving.

• Lock Mechanism: Funds are locked until the maturity date.

• Emergency Withdrawal: Users can break the lock early but incur a penalty.

  • 5% penalty if more than 24 hours remain.

  • 1% penalty if less than 24 hours remain.

• Revenue: Penalties are programmatically sent to the protocol developer wallet.

2. Legacy Protocol (Inheritance)

A "Dead Man's Switch" mechanism for asset transfer.

• Configuration: Users set an inactivity threshold (e.g., 180 days) and a beneficiary address.

• Proof of Life: The owner can "Ping" the contract to reset the inactivity timer.

• Claiming: If the timer expires, the specific beneficiary can locate and claim the funds.

• Shareable Links: Deep-linking support allows beneficiaries to easily access the claim interface without manually searching for wallet addresses.

Smart Contract

• Language: Rust

• SDK: Arbitrum Stylus

• Optimization: Uses manual storage slot management to recycle Vault IDs (0-4), ensuring efficient storage usage and preventing storage bloat.

Frontend

• Framework: Next.js 14 (App Router)

• Styling: TailwindCSS

• Blockchain Interaction: Wagmi v2, Viem, RainbowKit

• Deployment: Vercel

Deployed Contracts

Arbitrum Sepolia Testnet: 0xA1C65aae77B7b052B07E473E9dD6F749093d223A