DeadSwitch

Your crypto shouldn't die with you.

If you stop checking in, your family gets your crypto. No lawyer. No company. Just math.

🌐 Live: deadswitch.online 📊 Pitch Deck: deadswitch.online/pitch-deck.html ⛓ Contract (Sepolia): 0xF957cDA1f676B9EAE65Ab99982CAa3a31A193CB7

ETHGlobal Cannes 2026

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For Judges — Quick Links

Resource	Link
🌐 Live app	https://deadswitch.online
🎬 Pitch video	https://deadswitch.online (embedded on landing page)
⛓ Deployed contract	0xF957cDA1f676B9EAE65Ab99982CAa3a31A193CB7 (Sepolia)
🔗 Chainlink upkeep	automation.chain.link/sepolia/87279356... (2.1 LINK funded)
🎛 Ledger PR	LedgerHQ/clear-signing-erc7730-registry#2511
🏷 ENS test	/api/ens/resolve/vitalik.eth
📋 Submissions file	SUBMISSIONS.md
🛠 Run locally	DEPLOYMENT.md

Try the demo in 60 seconds:

1. Go to https://deadswitch.online/create
2. Connect MetaMask (Sepolia testnet)
3. Type vitalik.eth as beneficiary — watch live ENS resolution
4. Deploy your vault (real on-chain transaction)
5. Go to /dashboard — use demo controls to Send Heartbeat / Simulate Death / Claim

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The Problem

$140 billion in crypto is permanently lost. Owners died, lost keys, or became incapacitated without sharing access. Your family has no way to recover your funds.

Existing solutions: Casa ($250/yr, centralized, they hold keys), Sarcophagus (needs SARCO token, 3 employees). No simple decentralized solution exists.

How DeadSwitch Works

Owner sets up vault → deposits crypto → adds heir (wife.eth)
              ↓
Owner sends heartbeat monthly → "I'm still here" → timer resets
              ↓
Owner stops checking in (90 days no heartbeat)
              ↓
Chainlink Automation triggers → RECOVERY MODE
              ↓
Heir verifies with World ID → claims on Ledger → funds transferred

One sentence: If you stop checking in, your family gets your crypto automatically.

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Demo (30 seconds)

1. Owner heartbeat → click "I'm Still Here" → green ✅
2. Simulate death → 90 days pass → vault turns RED 🚨
3. Heir claims → World ID verification → funds transferred 💰

Try it live: deadswitch.online/dashboard

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Architecture

Owner (Ledger heartbeat)
        │
        ▼
InheritanceVault.sol (Sepolia)
        │
        ▼
Chainlink Automation (checks every 30 days)
        │ (90 days no heartbeat)
        ▼
   RECOVERY MODE
        │
        ▼
┌───────────┬─────────────┬──────────┐
│  APPROVE  │   PENDING   │  CLAIM   │
│ Heartbeat │   Warning   │   Heir   │
│ received  │    sent     │  claims  │
└───────────┴─────────────┴──────────┘
        │
   ┌────┴────┐
   ▼         ▼
0G Storage  ENS Names
(shards)   (wife.eth)

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Sponsor Integrations

Applying for 3 prize tracks (all with real, verified implementations):

Sponsor	Track	Evidence	Prize
Chainlink	"Connect the World" — Automation triggers state change on-chain	Contract implements checkUpkeep/performUpkeep (Sol L92-105) · Live upkeep funded with 2.1 LINK	$4K
ENS	"Best Use of ENS" — Heirs named by ENS, live resolution	/api/ens/resolve/:name · ownerENS/beneficiaryENS stored on-chain	$3K
Ledger	"ERC-7730 Clear Signing" — Manifest for all vault functions	PR #2511 submitted · Live manifest	$4K

Secondary integrations (in the codebase, not primary submissions):

• World ID — Heir verification via @worldcoin/idkit
• 0G — Shamir shard storage via @0glabs/0g-ts-sdk
• Flare — TEE attestation cryptography for key recovery

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Security Model — Defense in Depth

Attack	Defense
Wrong person claims	Pre-approved address (set at creation) + World ID (anti-bot) + optional secret phrase
Owner in coma (not dead)	90-day grace period + multi-channel alerts at 30/60/75/85 days + owner can cancel anytime
Key shards compromised	Shamir 3-of-5 threshold — attacker needs 3 shards from different storage locations
Heir loses access	Owner can update beneficiary anytime while vault is active
Fake heartbeat (hacker keeps owner "alive")	Ledger hardware signing — can't be faked remotely
Smart contract bug	35 tests pass, OpenZeppelin ReentrancyGuard, simple design

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V2 Roadmap (Planned)

• Trusted Guardian — 1-2 contacts can PAUSE recovery ("my brother can vouch I'm alive")
• Multi-sig claim — Beneficiary + guardian must both approve (2-of-3)
• Escalating alerts — Email + SMS + push at 30/60/75/85 days
• Cancel window — 30-day buffer after recovery mode before funds move
• Auto-heartbeat — Scheduled transactions for convenience
• Duress signal — Special heartbeat that silently alerts authorities
• Multi-heir — Split inheritance between multiple beneficiaries by percentage
• Legal document export — Generate PDF will from vault config
• Mainnet deployment — Ethereum + Polygon + Arbitrum
• Formal audit — Before mainnet launch

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Features

• 🔐 Dead Man's Switch — Monthly heartbeat. Miss 90 days → recovery activates
• 🆔 World ID — Anti-bot verification for heir claims
• 🔑 Ledger — Hardware proof of life + hardware claim signing
• ⛓ Chainlink — Decentralized automation, can't be bribed or stopped
• 🏷 ENS — "hugo.eth → wife.eth" instead of hex addresses
• 💾 0G Storage — Encrypted Shamir key shards, decentralized persistence
• 🛡 Flare TEE — Tamper-proof key reconstruction with attestation proof
• 🌐 6 Languages — EN, FR, ES, IT, DE, JA (auto-detect browser)
• 🔑 Shamir Secret Sharing — Key split into 5 shards, 3 needed to recover

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Quick Start

git clone https://github.com/Lastoneparis/deadswitch.git
cd deadswitch
./scripts/demo.sh

Dashboard: deadswitch.online | API: deadswitch.online/api

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Tech Stack

Layer	Technology
Contracts	Solidity 0.8.20, Hardhat, Sepolia
Frontend	Next.js 16, Tailwind CSS, wagmi
Backend	Node.js, Express, SQLite
Oracles	Chainlink Automation
Identity	World ID (@worldcoin/idkit)
Hardware	Ledger Clear Signing (EIP-712)
Storage	0G DA Layer (@0glabs/0g-ts-sdk)
Naming	ENS (ensideas API)
TEE	Flare Network
Key Splitting	Shamir Secret Sharing
i18n	6 languages, browser auto-detect

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Project Structure

deadswitch/
  contracts/          # InheritanceVault.sol (35 tests, deployed Sepolia)
  backend/            # Express API (13 endpoints, Shamir, 0G, World ID, Chainlink, Flare)
  frontend/           # Next.js (landing, dashboard, create, claim, how-it-works)
  scripts/            # demo.sh, deploy

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Inspiration

This project was inspired by the passing of my father. He left behind more than memories — he left behind the realization that everything digital can disappear forever when someone dies.

DeadSwitch exists so that losing someone doesn't mean losing everything they left behind.

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Built at ETHGlobal Cannes 2026 | MIT License