Vitalik Buterin Serpent oracle fetcher (Oct 12, 2015). get(string) requires >=0.007 ETH, derives a request id from sha3+block.prevhash, emits GetRequest, returns the id, and sends the balance to Vitalik's 0xde0b2956 address. Byte-for-byte cracked (Serpent @ f0b4128).
Historical Significance
Part of a series of private lottery contract experiments Vitalik deployed on mainnet in October 2015. The hardcoded 'cow' test key links these to pyethereum's classic test patterns.
Key Facts
Description
Deployed October 2015 by Vitalik Buterin. A paid query contract written in Serpent with a single get(string) entry point: callers must send a minimum fee, the contract records a hash derived from the caller, value and input, emits a log event, and forwards the fee onward. Byte-identical siblings exist in this collection.
Source Verified
Serpent get(string) oracle fetcher. Compiled with ethereum/serpent @ f0b4128 (2015-10-15); creation and runtime bytecode match on-chain exactly (404-byte runtime). Requires >= 0.007 ETH, derives an id = sha3(block.prevhash + sha3(url) + msg.sender + msg.value*2^160), emits GetRequest(string,address,uint256,uint256), returns the id, and sends the balance to Vitalik's address 0xde0b2956. Solidity cannot produce this bytecode (Serpent init marker, memory allocator, raw LOG1 with literal topic).
Heuristic Analysis
The following characteristics were detected through bytecode analysis and may not be accurate.
Frontier Era
The initial release of Ethereum. A bare-bones implementation for technical users.
Bytecode Overview
Verified Source Available
Source verified through compiler archaeology and exact bytecode matching.
View Verification ProofShow source code (Serpent)
# Submitted by EthereumHistory (ethereumhistory.com)
event GetRequest(url:string, sender:address, id:uint256, value:uint256)
def get(url:string):
if msg.value >= 7000000000000000:
self.storage[0] = sha3(block.prevhash + sha3(url:str) + msg.sender + msg.value * 2^160)
log(type=GetRequest, url, msg.sender, self.storage[0], msg.value)
return(self.storage[0])
send(0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae, self.balance)
External Links
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