ArbiterRegistry Contract Verification

Contract: 0x82afa2c4a686af9344e929f9821f3e8c6e9293ab
Deployer: 0x1db3439a222c519ab44bb1144fc28167b4fa6ee6 (Vitalik Buterin early dev address)
Block: 301,954
Date: September 28, 2015
Language: Serpent
Status: ✅ Exact bytecode match (byte-for-byte)

What This Is

An arbiter (escrow mediator) registry contract from Vitalik Buterin's early development work on the Ethereum arbitration dapp. Arbiters could register themselves with a minimum 1 ETH fee, which decayed exponentially over time. The system was designed to rank arbiters by their effective fee using an exponential decay formula.

Source

File: arbiter_reg.se
Repository: ethereum/dapp-bin
Commit: 08fe3e5b
Path: arbitration/arbiter_reg.se

Compiler

Language: Serpent
Repository: ethereum/serpent
Commit: e5a5f875
Date: September 26, 2015
Commit Message: "Fixed return arrays and min/max"

Verification

# Build Docker image with exact Serpent commit
docker build -t arbiter-reg-verify .

# Run verification (inside container)
docker run --rm arbiter-reg-verify python2 /verify.py
# Expected: VERIFICATION PASSED: Exact byte-for-byte match!

Or manually in Python (requires Serpent built from e5a5f875):

import serpent
r = serpent.compile(open('arbiter_reg.se').read())
# Runtime: r[14:14+1638]
# Compare to onchain-runtime.hex

Contract Features

• register(): Pay ≥1 ETH to register as arbiter. Subsequent payments renew your registration.
• set_description(str): Set a description string (max 288 chars).
• get_tot_fee(address): Get the current (decayed) fee for an arbiter.
• get_description(address): Get arbiter's description.
• get_addresses(startIndex): Paginate through all registered arbiters.
• exp_decay(val, i): Internal exponential decay calculation using Taylor series.
• withdraw(): Ethereum Foundation can withdraw registration fees.

Key Technical Details

• Uses Serpent's data keyword for structured storage: data arbiters[2**160](totFee, lastPaid, description[10])
• Exponential decay formula: 50% per month using 3rd-order Taylor expansion
• PERIOD = 86400 × 30 × 1000 / 693 ≈ 3,722,943 (milliseconds per half-life period)
• EF withdrawal address hardcoded: 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae

Proof

Field	Value
On-chain address	0x82afa2c4a686af9344e929f9821f3e8c6e9293ab
Creation tx	0xc3f01f2508d0018ae7661730f9ec6cb589c71666fd95f42bd400168ccc52e556
Block	301,954
Source commit	08fe3e5b (dapp-bin)
Compiler commit	e5a5f875 (serpent, Sep 26 2015)
Runtime size	1,638 bytes
Differences	0 (exact match)