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ETH tutorial first token
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pragma solidity ^0.4.16; | |
contract FirstToken { | |
string public name; | |
string public symbol; | |
/* This creates an array with all balances */ | |
mapping (address => uint256) public balanceOf; | |
event Transfer(address indexed from, address indexed to, uint256 value); | |
/* Initializes contract with initial supply tokens to the creator of the contract */ | |
function FirstToken( | |
uint256 initialSupply, | |
string tokenName, | |
string tokenSymbol | |
) { | |
balanceOf[msg.sender] = initialSupply; // Give the creator all initial tokens | |
name = tokenName; | |
symbol = tokenSymbol; | |
} | |
/* Send coins */ | |
function transfer(address _to, uint256 _value) { | |
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough | |
require(balanceOf[_to] + _value >= balanceOf[_to]); // Check for overflows | |
balanceOf[msg.sender] -= _value; // Subtract from the sender | |
balanceOf[_to] += _value; // Add the same to the recipient | |
/* Notify anyone listening that this transfer took place */ | |
Transfer(msg.sender, _to, _value); | |
} | |
} |
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