以太坊程式碼合集-總結
阿新 • • 發佈:2018-12-15
首先是 index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>CryptoZombies front-end</title> <script language="javascript" type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script language="javascript" type="text/javascript" src="web3.min.js"></script> <script language="javascript" type="text/javascript" src="cryptozombies_abi.js"></script> </head> <body> <div id="txStatus"></div> <div id="zombies"></div> <script> var cryptoZombies; var userAccount; function startApp() { var cryptoZombiesAddress = "YOUR_CONTRACT_ADDRESS"; cryptoZombies = new web3js.eth.Contract(cryptoZombiesABI, cryptoZombiesAddress); var accountInterval = setInterval(function() { // Check if account has changed if (web3.eth.accounts[0] !== userAccount) { userAccount = web3.eth.accounts[0]; // Call a function to update the UI with the new account getZombiesByOwner(userAccount) .then(displayZombies); } }, 100); // Start here cryptoZombies.events.Transfer({ filter: { _to: userAccount } }) .on("data", function(event) { let data = event.returnValues; getZombiesByOwner(userAccount).then(displayZombies); }).on("error", console.error); } function displayZombies(ids) { $("#zombies").empty(); for (id of ids) { // Look up zombie details from our contract. Returns a `zombie` object getZombieDetails(id) .then(function(zombie) { // Using ES6's "template literals" to inject variables into the HTML. // Append each one to our #zombies div $("#zombies").append(`<div class="zombie"> <ul> <li>Name: ${zombie.name}</li> <li>DNA: ${zombie.dna}</li> <li>Level: ${zombie.level}</li> <li>Wins: ${zombie.winCount}</li> <li>Losses: ${zombie.lossCount}</li> <li>Ready Time: ${zombie.readyTime}</li> </ul> </div>`); }); } } function createRandomZombie(name) { // This is going to take a while, so update the UI to let the user know // the transaction has been sent $("#txStatus").text("Creating new zombie on the blockchain. This may take a while..."); // Send the tx to our contract: return cryptoZombies.methods.createRandomZombie(name) .send({ from: userAccount }) .on("receipt", function(receipt) { $("#txStatus").text("Successfully created " + name + "!"); // Transaction was accepted into the blockchain, let's redraw the UI getZombiesByOwner(userAccount).then(displayZombies); }) .on("error", function(error) { // Do something to alert the user their transaction has failed $("#txStatus").text(error); }); } function feedOnKitty(zombieId, kittyId) { $("#txStatus").text("Eating a kitty. This may take a while..."); return cryptoZombies.methods.feedOnKitty(zombieId, kittyId) .send({ from: userAccount }) .on("receipt", function(receipt) { $("#txStatus").text("Ate a kitty and spawned a new Zombie!"); getZombiesByOwner(userAccount).then(displayZombies); }) .on("error", function(error) { $("#txStatus").text(error); }); } function levelUp(zombieId) { $("#txStatus").text("Leveling up your zombie..."); return cryptoZombies.methods.levelUp(zombieId) .send({ from: userAccount, value: web3.utils.toWei("0.001", "ether") }) .on("receipt", function(receipt) { $("#txStatus").text("Power overwhelming! Zombie successfully leveled up"); }) .on("error", function(error) { $("#txStatus").text(error); }); } function getZombieDetails(id) { return cryptoZombies.methods.zombies(id).call() } function zombieToOwner(id) { return cryptoZombies.methods.zombieToOwner(id).call() } function getZombiesByOwner(owner) { return cryptoZombies.methods.getZombiesByOwner(owner).call() } window.addEventListener('load', function() { // Checking if Web3 has been injected by the browser (Mist/MetaMask) if (typeof web3 !== 'undefined') { // Use Mist/MetaMask's provider web3js = new Web3(web3.currentProvider); } else { // Handle the case where the user doesn't have Metamask installed // Probably show them a message prompting them to install Metamask } // Now you can start your app & access web3 freely: startApp() }) </script> </body> </html>
然後是 zombieownership.sol
pragma solidity ^0.4.25; import "./zombieattack.sol"; import "./erc721.sol"; import "./safemath.sol"; contract ZombieOwnership is ZombieAttack, ERC721 { using SafeMath for uint256; mapping (uint => address) zombieApprovals; function balanceOf(address _owner) external view returns (uint256) { return ownerZombieCount[_owner]; } function ownerOf(uint256 _tokenId) external view returns (address) { return zombieToOwner[_tokenId]; } function _transfer(address _from, address _to, uint256 _tokenId) private { ownerZombieCount[_to] = ownerZombieCount[_to].add(1); ownerZombieCount[msg.sender] = ownerZombieCount[msg.sender].sub(1); zombieToOwner[_tokenId] = _to; emit Transfer(_from, _to, _tokenId); } function transferFrom(address _from, address _to, uint256 _tokenId) external payable { require (zombieToOwner[_tokenId] == msg.sender || zombieApprovals[_tokenId] == msg.sender); _transfer(_from, _to, _tokenId); } function approve(address _approved, uint256 _tokenId) external payable onlyOwnerOf(_tokenId) { zombieApprovals[_tokenId] = _approved; emit Approval(msg.sender, _approved, _tokenId); } }
zombieattack.sol
pragma solidity ^0.4.25; import "./zombiehelper.sol"; contract ZombieAttack is ZombieHelper { uint randNonce = 0; uint attackVictoryProbability = 70; function randMod(uint _modulus) internal returns(uint) { randNonce = randNonce.add(1); return uint(keccak256(abi.encodePacked(now, msg.sender, randNonce))) % _modulus; } function attack(uint _zombieId, uint _targetId) external onlyOwnerOf(_zombieId) { Zombie storage myZombie = zombies[_zombieId]; Zombie storage enemyZombie = zombies[_targetId]; uint rand = randMod(100); if (rand <= attackVictoryProbability) { myZombie.winCount = myZombie.winCount.add(1); myZombie.level = myZombie.level.add(1); enemyZombie.lossCount = enemyZombie.lossCount.add(1); feedAndMultiply(_zombieId, enemyZombie.dna, "zombie"); } else { myZombie.lossCount = myZombie.lossCount.add(1); enemyZombie.winCount = enemyZombie.winCount.add(1); _triggerCooldown(myZombie); } } }
zombiehelper.sol
pragma solidity ^0.4.25;
import "./zombiefeeding.sol";
contract ZombieHelper is ZombieFeeding {
uint levelUpFee = 0.001 ether;
modifier aboveLevel(uint _level, uint _zombieId) {
require(zombies[_zombieId].level >= _level);
_;
}
function withdraw() external onlyOwner {
address _owner = owner();
_owner.transfer(address(this).balance);
}
function setLevelUpFee(uint _fee) external onlyOwner {
levelUpFee = _fee;
}
function levelUp(uint _zombieId) external payable {
require(msg.value == levelUpFee);
zombies[_zombieId].level = zombies[_zombieId].level.add(1);
}
function changeName(uint _zombieId, string _newName) external aboveLevel(2, _zombieId) onlyOwnerOf(_zombieId) {
zombies[_zombieId].name = _newName;
}
function changeDna(uint _zombieId, uint _newDna) external aboveLevel(20, _zombieId) onlyOwnerOf(_zombieId) {
zombies[_zombieId].dna = _newDna;
}
function getZombiesByOwner(address _owner) external view returns(uint[]) {
uint[] memory result = new uint[](ownerZombieCount[_owner]);
uint counter = 0;
for (uint i = 0; i < zombies.length; i++) {
if (zombieToOwner[i] == _owner) {
result[counter] = i;
counter++;
}
}
return result;
}
}
zombiefeeding.sol
pragma solidity ^0.4.25;
import "./zombiefactory.sol";
contract KittyInterface {
function getKitty(uint256 _id) external view returns (
bool isGestating,
bool isReady,
uint256 cooldownIndex,
uint256 nextActionAt,
uint256 siringWithId,
uint256 birthTime,
uint256 matronId,
uint256 sireId,
uint256 generation,
uint256 genes
);
}
contract ZombieFeeding is ZombieFactory {
KittyInterface kittyContract;
modifier onlyOwnerOf(uint _zombieId) {
require(msg.sender == zombieToOwner[_zombieId]);
_;
}
function setKittyContractAddress(address _address) external onlyOwner {
kittyContract = KittyInterface(_address);
}
function _triggerCooldown(Zombie storage _zombie) internal {
_zombie.readyTime = uint32(now + cooldownTime);
}
function _isReady(Zombie storage _zombie) internal view returns (bool) {
return (_zombie.readyTime <= now);
}
function feedAndMultiply(uint _zombieId, uint _targetDna, string _species) internal onlyOwnerOf(_zombieId) {
Zombie storage myZombie = zombies[_zombieId];
require(_isReady(myZombie));
_targetDna = _targetDna % dnaModulus;
uint newDna = (myZombie.dna + _targetDna) / 2;
if (keccak256(abi.encodePacked(_species)) == keccak256(abi.encodePacked("kitty"))) {
newDna = newDna - newDna % 100 + 99;
}
_createZombie("NoName", newDna);
_triggerCooldown(myZombie);
}
function feedOnKitty(uint _zombieId, uint _kittyId) public {
uint kittyDna;
(,,,,,,,,,kittyDna) = kittyContract.getKitty(_kittyId);
feedAndMultiply(_zombieId, kittyDna, "kitty");
}
}
zombiefactory.sol
pragma solidity ^0.4.25;
import "./ownable.sol";
import "./safemath.sol";
contract ZombieFactory is Ownable {
using SafeMath for uint256;
using SafeMath32 for uint32;
using SafeMath16 for uint16;
event NewZombie(uint zombieId, string name, uint dna);
uint dnaDigits = 16;
uint dnaModulus = 10 ** dnaDigits;
uint cooldownTime = 1 days;
struct Zombie {
string name;
uint dna;
uint32 level;
uint32 readyTime;
uint16 winCount;
uint16 lossCount;
}
Zombie[] public zombies;
mapping (uint => address) public zombieToOwner;
mapping (address => uint) ownerZombieCount;
function _createZombie(string _name, uint _dna) internal {
uint id = zombies.push(Zombie(_name, _dna, 1, uint32(now + cooldownTime), 0, 0)) - 1;
zombieToOwner[id] = msg.sender;
ownerZombieCount[msg.sender] = ownerZombieCount[msg.sender].add(1);
emit NewZombie(id, _name, _dna);
}
function _generateRandomDna(string _str) private view returns (uint) {
uint rand = uint(keccak256(abi.encodePacked(_str)));
return rand % dnaModulus;
}
function createRandomZombie(string _name) public {
require(ownerZombieCount[msg.sender] == 0);
uint randDna = _generateRandomDna(_name);
randDna = randDna - randDna % 100;
_createZombie(_name, randDna);
}
}
ownable.sol
pragma solidity ^0.4.25;
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @return the address of the owner.
*/
function owner() public view returns(address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner());
_;
}
/**
* @return true if `msg.sender` is the owner of the contract.
*/
function isOwner() public view returns(bool) {
return msg.sender == _owner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0));
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
safemath.sol
pragma solidity ^0.4.25;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title SafeMath32
* @dev SafeMath library implemented for uint32
*/
library SafeMath32 {
function mul(uint32 a, uint32 b) internal pure returns (uint32) {
if (a == 0) {
return 0;
}
uint32 c = a * b;
assert(c / a == b);
return c;
}
function div(uint32 a, uint32 b) internal pure returns (uint32) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint32 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint32 a, uint32 b) internal pure returns (uint32) {
assert(b <= a);
return a - b;
}
function add(uint32 a, uint32 b) internal pure returns (uint32) {
uint32 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title SafeMath16
* @dev SafeMath library implemented for uint16
*/
library SafeMath16 {
function mul(uint16 a, uint16 b) internal pure returns (uint16) {
if (a == 0) {
return 0;
}
uint16 c = a * b;
assert(c / a == b);
return c;
}
function div(uint16 a, uint16 b) internal pure returns (uint16) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint16 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint16 a, uint16 b) internal pure returns (uint16) {
assert(b <= a);
return a - b;
}
function add(uint16 a, uint16 b) internal pure returns (uint16) {
uint16 c = a + b;
assert(c >= a);
return c;
}
}
erc721.sol
pragma solidity ^0.4.25;
contract ERC721 {
event Transfer(address indexed _from, address indexed _to, uint256 indexed _tokenId);
event Approval(address indexed _owner, address indexed _approved, uint256 indexed _tokenId);
function balanceOf(address _owner) external view returns (uint256);
function ownerOf(uint256 _tokenId) external view returns (address);
function transferFrom(address _from, address _to, uint256 _tokenId) external payable;
function approve(address _approved, uint256 _tokenId) external payable;
}
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這是最後的結果