Deadman Switch Verification

Byte-for-byte bytecode verification for 0xa73961e6c1e5e635b5f3f66d8b17834e34aa9215.

Field	Value
Contract	0xa73961e6c1e5e635b5f3f66d8b17834e34aa9215
Network	Ethereum Mainnet
Block	580,469
Deployed	November 22, 2015
Deployer	0x1db3439a222c519ab44bb1144fc28167b4fa6ee6 (Vitalik Buterin dev address)
Compiler	Serpent (ethereum/serpent commit bc4ce59)
Optimizer	N/A
Runtime match	✅ EXACT (284 bytes)

Verification

# Requires Docker with the serpent-bc4ce59 image built locally
./verify.sh

Building the Compiler

git clone https://github.com/ethereum/serpent
cd serpent
git checkout bc4ce59
docker build -t serpent-bc4ce59 .

What This Contract Does

A deadman switch contract — if the owner stops sending ping() transactions for more than 1000 seconds, the trustee gains the ability to withdraw funds. The owner can also withdraw at any time.

• ping(): Owner resets the last-ping timestamp.
• setTrustee(address): Owner designates a trustee.
• withdraw(address, amount): Owner can withdraw anytime; trustee can withdraw if block.timestamp > lastPing + 1000.

This was a common early Ethereum pattern for testing time-based access control. Deployed by Vitalik Buterin from his early development address in November 2015.