Dead Man’s Switch Smart Contracts

This repository contains multiple implementations of a Dead Man’s Switch contract across different blockchain technologies, including Solidity (Ethereum), Clarity (Stacks), Clarity with Bitcoin UTXOs, and Bitcoin Script (Miniscript/Bitscript). All contracts have not been audited by a firm, so proceed with caution and do not use in a production environment without proper auditing, preventing loss of funds.

A Dead Man’s Switch is a mechanism that automatically transfers assets if the owner fails to check in within a certain timeframe.

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1. Solidity Contract (Ethereum)

Overview

• Manages ERC-20 tokens or native ETH.
• Transfers funds to a beneficiary if the owner does not check in within the timeout period.
• Uses block timestamps to track inactivity.

Key Features

✅ Allows the owner to check in periodically.
✅ Transfers assets to a designated beneficiary if the timeout expires.
✅ Supports ERC-20 tokens and native ETH.

Deployment & Usage

• Deploy on Ethereum or any EVM-compatible chain (e.g., Polygon, BSC).
• Owner must periodically call checkIn().
• If the timeout expires, the triggerSwitch() function transfers assets to the beneficiary.

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2. Clarity Contract (Stacks)

Overview

• Manages STX tokens and SIP-010 fungible tokens on Stacks.
• Uses Stacks block height instead of timestamps.
• Only the contract owner can check in.

Key Features

✅ Uses Stacks smart contracts (Clarity language).
✅ Transfers STX or SIP-010 tokens upon owner inactivity.
✅ Fully on-chain execution.

Deployment & Usage

• Deploy the contract on Stacks blockchain.
• The owner must call check-in() to prevent execution.
• The trigger-switch() function allows the beneficiary to claim assets after the timeout.

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3. Clarity Contract with Bitcoin UTXOs

Overview

• Stores Bitcoin UTXOs instead of just STX tokens.
• If the owner fails to check in, BTC is sent to the beneficiary using a pre-signed Bitcoin transaction.

Key Features

✅ Works with Bitcoin Layer 1 UTXOs.
✅ Integrates with Stacks & Bitcoin using Clarity.
✅ Uses Bitcoin Script (P2SH/P2WSH) for UTXO control.

Deployment & Usage

1. Deposit BTC into the contract-controlled UTXO.
2. Owner must call check-in() to maintain control.
3. If the timeout expires, a Bitcoin transaction is triggered to send funds to the BTC beneficiary.

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4. Miniscript / Bitscript Contract (Bitcoin)

Overview

• Implements a Bitcoin Script-based Dead Man’s Switch using Miniscript.
• Funds are locked in a Bitcoin P2SH address.
• If the owner does not sign within the timeout, the beneficiary can claim the funds.

Key Features

✅ Uses Bitcoin-native locking scripts.
✅ Supports timelocks (CLTV/CSV).
✅ Can work as a standalone Bitcoin contract without other blockchains.

Deployment & Usage

• Lock BTC into a P2SH (or P2WSH) address using the contract script.
• The owner must sign periodically to reset the timelock.
• After the timeout, the beneficiary can spend BTC using a different script path.

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Comparison Table

Implementation	Blockchain	Assets Supported	Timeout Mechanism	Dependency
Solidity	Ethereum / EVM	ETH, ERC-20	Timestamp	EVM Chains
Clarity (STX Only)	Stacks	STX, SIP-010	Block Height	Stacks
Clarity + UTXOs	Stacks & Bitcoin	BTC (UTXOs)	Block Height	Bitcoin & Stacks
Miniscript/Bitscript	Bitcoin	BTC (UTXOs)	CLTV/CSV	Bitcoin Only

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Open Source Upgrades Options

✅ Implement multisig options for more security.
✅ Implement Lightning Network integration for faster BTC transactions.

Final Thoughts

• If using Ethereum, deploy the Solidity contract.
• If working with Stacks, use the Clarity contract.
• If integrating Bitcoin Layer 1, use Clarity + UTXOs.
• If building directly on Bitcoin, use Miniscript/Bitscript.

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It's appointed for man / woman to die, then judgement. Whether Heaven or Hell, the assets we buy and sell remains on Earth. This is a way to manage and transition assets well.