Ethereum Contract
Smart Contract
Smart Contract
- Class Object Instance
- Not pure function formally
- Asymmetric Cryptography Signature
- State Machine
Truffle Suite
- Framework for building smart contract
- Interactive console
- Script migration and deployment
- Package management
Tested Smart Contract Templates
Access Control
Crowdsales
Tokens
Ownable
Roles
Token Emission
Validation
ERC20 - Amount
ERC721 - Each ID
Create a ERC20 Contract
npm i -g truffle
truffle install zeppelin
pragma solidity ^0.4.23;
import "zeppelin/contracts/token/StandardToken.sol";
contract RytassCoin is StandardToken {
string public name = "RytassCoin";
string public symbol = "RYC";
uint public decimals = 8;
uint public INITIAL_SUPPLY = 100000000;
function RytassCoin() public {
totalSupply = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
}
}
pragma solidity ^0.4.11;
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) allowed;
function transferFrom(address _from, address _to, uint256 _value) public returns (bool)
function approve(address _spender, uint256 _value) public returns (bool)
function allowance(address _owner, address _spender) public constant returns (uint256 remaining)
function increaseApproval (address _spender, uint _addedValue) returns (bool success)
function decreaseApproval (address _spender, uint _subtractedValue) returns (bool success)
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
StandardToken.sol
const RytassCoin = artifacts.require('./RytassCoin.sol');
module.exports = function(deployer) {
deployer.deploy(RytassCoin);
};
Deployment
truffle develop
> compile
> migrate
Ropsten
Ethereum Smart Contract
By Chia Yu Pai
Ethereum Smart Contract
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