Tutorial-derived coin contract (Solidity v0.1.1), one of multiple token instances deployed by the same address on Aug 8, 2015.
Historical Significance
Part of the earliest wave of smart contracts on Ethereum mainnet. Illustrates how developers experimented with repeated tutorial contract deployments during the Frontier era, when gas was virtually free and the network served as an open sandbox.
Context
Deployed during the Ethereum Frontier era (launched July 30, 2015). Solidity was at v0.1.x, no token standards existed yet, and the Ethereum Foundation published coin tutorials in the Frontier Guide to bootstrap developer adoption.
Key Facts
Description
One of five token instances deployed by 0x4b0C6F0297CEe4B551B6fab3277067B64B238990 on August 8, 2015, during the first days of the Ethereum Frontier era. The bytecode is identical across all instances — a minimal coin contract with coinBalanceOf, sendCoin, and CoinTransfer event, compiled with Solidity v0.1.1.
The repeated deployments within hours suggest iterative testing or tutorial experimentation. The contract pattern closely mirrors the coin examples from the Ethereum Frontier Guide. At least nine total token deployments occurred between August 8–11, 2015, from four different deployer addresses — making it one of the most replicated early tutorial contracts on mainnet.
See the first instance (0x3c401b518252abe3bbbf898a44939699e7da1634) for full documentation.
Source Verified
Historian Categories
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 on Etherscan.
Show source code (Solidity)
contract token {
mapping (address => uint) public coinBalanceOf;
event CoinTransfer(address sender, address receiver, uint amount);
function token(uint supply) {
coinBalanceOf[msg.sender] = 1000000;
}
function sendCoin(address receiver, uint amount) returns(bool sufficient) {
if (coinBalanceOf[msg.sender] < amount) {
return false;
}
coinBalanceOf[msg.sender] -= amount;
coinBalanceOf[receiver] += amount;
CoinTransfer(msg.sender, receiver, amount);
return true;
}
}