0x1c7c...f4d3

Token

0x1c7c3f36d59b...ff6f675bf4d3

FrontierContract #714Exact Bytecode MatchEdit this contract

Deployed September 1, 2015 (11 years ago)Block 174,093

The endowment retriever from the solidity-baby-steps tutorials, whose send-one-ether-home function anyone can call.

Frontier EraVerified Source

Historical Significance

The ethereum.org token tutorial is where most people who deployed a token in this period started, and this is its opening form: a balance mapping, a guarded subtraction and the metadata a wallet needs to show a name. It has no allowance, so nothing can spend on a holder's behalf and no exchange or escrow can be given a limit. That gap is exactly what ERC-20 was written to close, and copies like this one are the before picture.

Context

Deployed 1 September 2015, during the Frontier era.

Key Facts

Deployer

Cyrus Adkisson(0xcf684d...ad1bac)

Deployment Block

174,093

Deployment Date

Sep 1, 2015, 10:33 PM

Code Size

474.0 B

Gas at Deploy

169,243

Transactions by Year

20154

Deployment Transaction: 0x1d81b2dc3c3930ed...e982a392b4bc200f

Description

Example 30 of the solidity-baby-steps tutorial series, deployed by the author of the series. The constructor records the creator and the value the contract was created with, so that getContractCreationValue can report the original endowment separately from the running balance. sendOneEtherHome sends exactly 1e18 wei to the creator and has no access control, so any address can trigger the transfer, though the funds go to the creator either way. The send return value is not checked.

Source Verified

Exact bytecode match(474 bytes)

Compiler: v0.1.1+

View verification proof

Heuristic Analysis

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

Detected Type: Token

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

Opcodes474

Unique Opcodes70

Jump Instructions14

Storage Operations7

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
contract EndowmentRetriever {

    address creator;
    uint contract_creation_value; // original endowment

    function EndowmentRetriever() public 
    {
        creator = msg.sender; 								// msg is a global variable
        contract_creation_value = msg.value;  				// the endowment of this contract in wei 
    }
	
    function getContractCreationValue() constant returns (uint) // returns the original endowment of the contract
    {										              		// set at creation time with "value: <someweivalue>"	
    	return contract_creation_value;                         // this is now the "balance" of the contract
    }
    
    function sendOneEtherHome() public         	
    {						
    	creator.send(1000000000000000000);				// send 1 ETH home
    }
        
    /**********
     Standard kill() function to recover funds 
     **********/
    
    function kill()
    { 
        if (msg.sender == creator)
        {
            suicide(creator);  // kills this contract and sends remaining funds back to creator
        }
    }
        
}


/*

********************** DEPLOYED WITH ******************************

var endowmentretrieverContract = web3.eth.contract([{
    "constant": false,
    "inputs": [],
    "name": "kill",
    "outputs": [],
    "type": "function"
}, {
    "constant": true,
    "inputs": [],
    "name": "getContractCreationValue",
    "outputs": [{
        "name": "",
        "type": "uint256"
    }],
    "type": "function"
}, {
    "constant": false,
    "inputs": [],
    "name": "sendOneEtherHome",
    "outputs": [],
    "type": "function"
}, {
    "inputs": [],
    "type": "constructor"
}]);

var endowmentretriever = endowmentretrieverContract.new({
    from: web3.eth.accounts[0],
    data: '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',
    gas: 1000000,
    value: 3000000000000000000 // START CONTRACT WITH AN ENDOWMENT OF 3 ETH
}, function(e, contract) {
    if (typeof contract.address != 'undefined') {
        console.log(e, contract);
        console.log('Contract mined! address: ' + contract.address + ' transactionHash: ' + contract.transactionHash);
    }
})


********************** EXECUTION IN GETH ******************************

> endowmentretriever.getContractCreationValue();
3000000000000000000
> web3.fromWei(endowmentretriever.getContractCreationValue());
3																						    // After creation, we can verify it holds 3 ETH
> web3.fromWei(eth.getBalance(eth.coinbase));										
6.75688459417901484																			// Our coinbase now holds 6.75 vs 9.75 before
>  var receipt = web3.eth.getTransactionReceipt('0x1d81b2dc3c3930edd766e153c30e598994018aeac36a9beee982a392b4bc200f');
undefined
> receipt
{
  blockHash: "0x04246ae26cb9b51128d1c87e8363d4bcefad90ea98586f606522a348d2305eee",
  blockNumber: 174093,
  contractAddress: "0x1c7c3f36d59bcaa4a7dfdf58f347ff6f675bf4d3",
  cumulativeGasUsed: 169243,
  gasUsed: 169243,
  logs: [],
  transactionHash: "0x1d81b2dc3c3930edd766e153c30e598994018aeac36a9beee982a392b4bc200f",
  transactionIndex: 0
}
> var tx = endowmentretriever.sendOneEtherHome.sendTransaction({from:eth.coinbase});
undefined
> var sentHomeReceipt = web3.eth.getTransactionReceipt(tx);
undefined
> sentHomeReceipt
{
  blockHash: "0x19293ed30899b637510390cbfb1fe7ed8638524ebd322dc2f9889b7216b1f357",
  blockNumber: 174119,
  contractAddress: null,
  cumulativeGasUsed: 28302,
  gasUsed: 28302,
  logs: [],
  transactionHash: "0xeaea5f0bf9dd8df4a74c43b1e20bbc08d7c02b6707b0ece724df91f6ce67fb17",
  transactionIndex: 0
}
> web3.fromWei(eth.getBalance('0x1c7c3f36d59bcaa4a7dfdf58f347ff6f675bf4d3'));
2																							// after the first exec, the balance is down to 2
> web3.fromWei(eth.getBalance(eth.coinbase));										
7.75688459417901484																			// coinbase up to 7.75 from 6.75
> var tx = endowmentretriever.sendOneEtherHome.sendTransaction({from:eth.coinbase});
undefined
> var sentHomeReceipt = web3.eth.getTransactionReceipt(tx);
undefined
> sentHomeReceipt
{
  blockHash: "0x8fdd9829040c25e0bd902fdc35e643b1f85f326c8b58a16db5897f26619ae83a",
  blockNumber: 174128,
  contractAddress: null,
  cumulativeGasUsed: 28302,
  gasUsed: 28302,
  logs: [],
  transactionHash: "0x009c584a521bef7c209fd879cafc27be6bb86eb70f54b46568a972e694fec82c",
  transactionIndex: 0
}
> web3.fromWei(eth.getBalance('0x1c7c3f36d59bcaa4a7dfdf58f347ff6f675bf4d3'));
1																							// after the first exec, the balance is down to 2
> web3.fromWei(eth.getBalance(eth.coinbase));										
8.75688459417901484																			// coinbase up to 8.75 from 7.75
> var tx = endowmentretriever.sendOneEtherHome.sendTransaction({from:eth.coinbase});
undefined
> var sentHomeReceipt = web3.eth.getTransactionReceipt(tx);
undefined
> sentHomeReceipt
{
  blockHash: "0xa63fce8addb966d9d2ab4fc9e05498af1fd6e0e6dcee258d22bed1882806d770",
  blockNumber: 174133,
  contractAddress: null,
  cumulativeGasUsed: 28302,
  gasUsed: 28302,
  logs: [],
  transactionHash: "0x39b945115e98b390041cf39886d67cd1fe0c265f74f49df15651a35f822faaaa",
  transactionIndex: 0
}
> web3.fromWei(eth.getBalance(eth.coinbase));
9.75546949417901484																			// coinbase back to original value of 9.75
> web3.fromWei(eth.getBalance('0x1c7c3f36d59bcaa4a7dfdf58f347ff6f675bf4d3'));
0																						    // contract endowment fully depleted
> endowmentretriever.kill.sendTransaction({from:eth.coinbase});
"0x588fd4e3f2fad1a61af08aaaf9f3ab8c7ad677dc4510b65d666bac644e7ca352"

*/

External Links

Etherscan Verified Source (if any)

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