ListLogs

utility

0xa619c3df689e...599d2e443f65

FrontierContract #2,227Exact Bytecode MatchEdit this contract

Deployed October 18, 2015 (10 years ago)Block 401,300

On-chain log aggregator (Serpent, list_logs/main.se): addLog(v) emits a Log(string) event; addBreak() marks the current block as a section boundary.

Frontier EraVerified Source

Context

Early Ethereum log/event aggregator contract by Vitalik Buterin (Oct 2015, block 401,300). Records arbitrary data as Log events; supports break markers keyed to block.number for temporal indexing. Verified: compiled with Serpent bc4ce59, exact bytecode match.

Key Facts

Deployer

Vitalik Buterin(0x1db343...fa6ee6)

Deployment Block

401,300

Deployment Date

Oct 18, 2015, 07:26 AM

Code Size

324.0 B

Gas at Deploy

120,775

Transactions by Year

201524

Deployment Transaction: 0x2429af13e09a6c0b...e9b3140a5373e161

Description

Deployed by Vitalik Buterin in 2015. A minimal on-chain logging contract written in Serpent (canonical source list_logs/main.se in ethereum/dapp-bin): addLog(v) emits a Log(string) event carrying an arbitrary string, addBreak() records the current block number as a section marker, and getLatestBreak() returns it. Byte-identical siblings exist in this collection.

Source Verified

SerpentExact bytecode match(324 bytes)

Compiler: Serpent

View verification proof

Exact 302-byte runtime match. Compiled with Serpent bc4ce59. Has def init() constructor — runtime extracted as result[18:18+302] (18-byte init header offset).

Heuristic Analysis

The following characteristics were detected through bytecode analysis and may not be accurate.

Detected Type: utility

Frontier Era

The initial release of Ethereum. A bare-bones implementation for technical users.

Block span: 0 — 1,149,999

July 30, 2015 — March 14, 2016

Bytecode Overview

Opcodes324

Unique Opcodes86

Jump Instructions12

Storage Operations3

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Serpent)

event Log(value:bytes)
data break

def init():
    self.break = block.number

def addLog(v:str):
    log(type=Log, v)

def addBreak():
    self.break = block.number

def const getLatestBreak():
    return(self.break)

External Links

Etherscan Verified Source (if any)

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