Coin (stub) — Bytecode Verification

Byte-for-byte verification of rank 40, the earliest known Coin stub contract on Ethereum mainnet.

Contract

Field	Value
Address	0x4fb5acbe16ffdda225cb14c64aa84c7e253b08ae
Block	54,126
Deployer	0x4b0c6f0297cee4b551b6fab3277067b64b238990
Rank	#40 (earliest deployed with real code and this bytecode)

Source

contract Coin {
    mapping (address => uint) public coinBalanceOf;
    function sendCoin(address receiver, uint amount) returns(uint sufficient) {}
}

The sendCoin body is empty — sufficient defaults to 0 and is returned implicitly. This is a stub/template deployment of the ethereum.org Coin tutorial, with the transfer logic omitted.

Compiler

• Compiler: soljson v0.1.1+commit.6ff4cd6 (JavaScript/emscripten)
• Optimizer: OFF
• Function: compileJSON(source, 0)

Reproduce

node -e "
var s=require('solc-emscripten-asmjs-v0.1.1+commit.6ff4cd6.js');
var c=s.cwrap('compileJSON','string',['string','number']);
var r=JSON.parse(c(require('fs').readFileSync('Coin.sol','utf8'),0));
var rt=r.contracts.Coin.bytecode;
// extract runtime (after 6000f3 boundary)
var idx=rt.indexOf('6000f3');
var runtime=rt.slice(idx+6);
if(runtime.startsWith('00')) runtime=runtime.slice(2);
console.log(runtime);
"

Verification

Runtime (181 bytes) matches both eth_getCode and the creation TX input extraction exactly.

Part of Awesome Ethereum Proofs and Ethereum History.