40 lines
1 KiB
Solidity
40 lines
1 KiB
Solidity
pragma solidity ^0.4.19;
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contract ZombieFactory {
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event NewZombie(uint zombieId, string name, uint dna);
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uint dnaDigits = 16;
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uint dnaModulus = 10 ** dnaDigits;
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struct Zombie {
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string name;
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uint dna;
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}
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Zombie[] public zombies;
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mapping (uint => address) public zombieToOwner;
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mapping (address => uint) ownerZombieCount;
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function _createZombie(string _name, uint _dna) private {
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uint id = zombies.push(Zombie(_name, _dna)) - 1;
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zombieToOwner[id] = msg.sender;
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ownerZombieCount[msg.sender]++;
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NewZombie(id, _name, _dna);
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}
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function _generateRandomDna(string _str) private view returns (uint) {
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uint rand = uint(keccak256(_str));
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return rand % dnaModulus;
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}
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function createRandomZombie(string _name) public {
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require(ownerZombieCount[msg.sender] == 0);
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uint randDna = _generateRandomDna(_name);
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_createZombie(_name, randDna);
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}
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}
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contract ZombieFeeding is ZombieFactory {}
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