Pong

Experimental

0xfc2c6085cde7...440f7b8f1099

FrontierContract #1,519Exact Bytecode MatchEdit this contract

Deployed September 24, 2015 (10 years ago)Block 280,885

A 71-byte contract whose single function, pong(), immediately sends the caller's ether back to them.

Frontier EraVerified Source

Historical Significance

An echo test for value transfer. Sending ether and getting it back in one transaction exercises the full round trip of call value, send and the caller's balance accounting, which is the smallest useful check that a 2015 client and contract toolchain were wired up correctly.

Context

Deployed 2015-09-24 by 0xf0134ff161a5c8f7c4f8cc33d3e1a7ae088594a9. One instance of this runtime is known. Source recovered by exact runtime bytecode match and verified on Sourcify with both runtime and creation code matching.

Key Facts

Deployer

0xf0134f...8594a9

Deployment Block

280,885

Deployment Date

Sep 24, 2015, 01:17 AM

Code Size

87.0 B

Gas at Deploy

40,841

Transactions by Year

20151

Deployment Transaction: 0x5131cf527fb2f127...b0cbb6847513b125

Description

The entire runtime is 71 bytes and exposes one selector, pong() at 0xbc9748a1, which calls msg.sender.send(msg.value) and returns. Ether sent with a call to pong() is returned to the sender in the same transaction, minus gas. Any ether that reaches the contract by another path has no way out: there is no owner, no withdraw function and no fallback that forwards value.

Source Verified

SolidityExact bytecode match(87 bytes)

Compiler: v0.1.3+

View verification proof

Heuristic Analysis

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

Detected Type: Experimental

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

Opcodes87

Unique Opcodes37

Jump Instructions2

Storage Operations0

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Verified on Etherscan Verified on Sourcify

View Verification Proof

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
contract Pong {
    function pong() {
        msg.sender.send(msg.value);
    }
}

External Links

Etherscan Verified Source (if any)

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