ERC20 TOKEN sample token for trials

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The Coin

We are going to create a digital token. Tokens in the ethereum ecosystem can represent any fungible tradable good: coins, loyalty points, gold certificates, IOUs, in game items, etc. Since all tokens implement some basic features in a standard way, this also means that your token will be instantly compatible with the ethereum wallet and any other client or contract that uses the same standards.


The standard token contract can be quite complex. But in essence a very basic token boils down to this:

contract MyToken {

/* This creates an array with all balances */

mapping (address => uint256) public balanceOf;

/* Initializes contract with initial supply tokens to the creator of the contract */

function MyToken(

uint256 initialSupply

) {

balanceOf[[login to view URL]] = initialSupply; // Give the creator all initial tokens


/* Send coins */

function transfer(address _to, uint256 _value) {

require(balanceOf[[login to view URL]] >= _value); // Check if the sender has enough

require(balanceOf[_to] + _value >= balanceOf[_to]); // Check for overflows

balanceOf[[login to view URL]] -= _value; // Subtract from the sender

balanceOf[_to] += _value; // Add the same to the recipient




But if you just want to copy paste a more complete code, then use this:

pragma solidity ^0.4.16;

interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }

contract TokenERC20 {

// Public variables of the token

string public name;

string public symbol;

uint8 public decimals = 18;

// 18 decimals is the strongly suggested default, avoid changing it

uint256 public totalSupply;

// This creates an array with all balances

mapping (address => uint256) public balanceOf;

mapping (address => mapping (address => uint256)) public allowance;

// This generates a public event on the blockchain that will notify clients

event Transfer(address indexed from, address indexed to, uint256 value);

// This notifies clients about the amount burnt

event Burn(address indexed from, uint256 value);


* Constrctor function


* Initializes contract with initial supply tokens to the creator of the contract


function TokenERC20(

uint256 initialSupply,

string tokenName,

string tokenSymbol

) public {

totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount

balanceOf[[login to view URL]] = totalSupply; // Give the creator all initial tokens

name = tokenName; // Set the name for display purposes

symbol = tokenSymbol; // Set the symbol for display purposes



* Internal transfer, only can be called by this contract


function _transfer(address _from, address _to, uint _value) internal {

// Prevent transfer to 0x0 address. Use burn() instead

require(_to != 0x0);

// Check if the sender has enough

require(balanceOf[_from] >= _value);

// Check for overflows

require(balanceOf[_to] + _value > balanceOf[_to]);

// Save this for an assertion in the future

uint previousBalances = balanceOf[_from] + balanceOf[_to];

// Subtract from the sender

balanceOf[_from] -= _value;

// Add the same to the recipient

balanceOf[_to] += _value;

Transfer(_from, _to, _value);

// Asserts are used to use static analysis to find bugs in your code. They should never fail

assert(balanceOf[_from] + balanceOf[_to] == previousBalances);



* Transfer tokens


* Send `_value` tokens to `_to` from your account


* @param

Taidot: Koodaus, Ohjelmointi

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Tietoa työnantajasta:
( 0 arvostelua ) United States

Projektin tunnus: #16097852

8 freelanceria on tarjonnut keskimäärin %project_bid_stats_avg_sub_26% %project_currencyDetails_sign_sub_27% tähän työhön


Dear,Sir How are you? I am very interested in your project and am ready for starting your project for now. I will work very hard and best for you. Best Regards

$500 USD 10 päivässä
(5 arvostelua)
$555 USD 10 päivässä
(13 arvostelua)

I am confident that I can implement this project as I have read all the details. There is 120 characters limit against each section so I can't type much. There are some questions. Please message me. Eager to present Lisää

$555 USD 10 päivässä
(4 arvostelua)

Hi, there! Thanks for posting the job. I am highly skilled and experienced in such cryptocurrency job so I can help you. I hope to discuss the project further with you. Thank you!

$555 USD 10 päivässä
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$555 USD 10 päivässä
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$555 USD 10 päivässä
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Hi, Oh, I have many developed ERC20 tokens with solidity laguage. This is we developed ICO homepage."[login to view URL]" Best Regards.

$555 USD 10 päivässä
(0 arvostelua)

Hi, Your description statement was a little unclear. You've just pasted the code available on the ethereum website. Nonetheless, I have previously worked with Erc20 tokens and ICOs. Kindly explain your requirements a Lisää

$300 USD 2 päivässä
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