Investment

other

0x5fc8aefc8688...2647fafa0d83

FrontierContract #41Source VerifiedEdit this contract

Deployed August 8, 2015 (11 years ago)Block 54,180

An early Frontier investment contract where users deposit ETH and can withdraw their balance, with an investor counter.

Frontier EraVerified Source

Historical Significance

One of the earliest deposit/withdrawal contracts on Ethereum mainnet, demonstrating basic financial contract patterns on Frontier.

Context

Deployed during Ethereum Frontier week 1. Simple ETH custody contracts like this were among the first financial experiments on the network.

Key Facts

Deployer

0x85a12e...e24538

Deployment Block

54,180

Deployment Date

Aug 8, 2015, 04:05 PM

Code Size

1.7 KB

Gas at Deploy

492,325

Transactions by Year

20152

Deployment Transaction: 0x6596a0fd8da948de...9b505d9e894465b5

Description

An investment contract deployed at block 54,180 (August 2015) on Ethereum Frontier. Users deposit ETH via the payable fallback, which credits their balanceOf mapping and increments the investor count. The withdraw_funds() function lets depositors reclaim their balance. At 1,315 bytes with only 3 functions, this is one of the simplest deposit/withdraw contracts from Ethereum's first week.

Source Verified

SolidityNear-exact bytecode match

Compiler: soljson

near_exact_match: reconstructed source with balanceOf mapping, payable fallback, and withdraw_funds. All 3 selectors confirmed via openchain.xyz (withdraw_funds, balanceOf, getNumInvestors).

Heuristic Analysis

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

Detected Type: other

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

Opcodes1,733

Unique Opcodes122

Jump Instructions93

Storage Operations72

Verified Source Available

Source verified through compiler archaeology (near-exact bytecode match).

Show source code (Solidity)

contract Investment {
    mapping(address => uint) public balanceOf;
    uint numInvestors;

    function() {
        balanceOf[msg.sender] += msg.value;
        numInvestors++;
    }

    function withdraw_funds() {
        uint amount = balanceOf[msg.sender];
        balanceOf[msg.sender] = 0;
        msg.sender.send(amount);
    }

    function getNumInvestors() constant returns (uint) {
        return numInvestors;
    }
}

External Links

Etherscan Verified Source (if any)

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