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@Abstrct
Last active Nov 25, 2017
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The ethereum tamagotchi-like smart contract
pragma solidity ^0.4.17;
contract doroidotchiBasuketto {
int constant hungerPerBlock = 1;
int constant boredomPerBlock = 2;
int constant energyPerBlock = 2;
int constant hungerPerFeed = 4000;
int constant boredomPerEntertainment = 2000;
int constant energyPerSleep = 8000;
struct DoroidotchiStruct {
string doroidotchiName;
int fed;
uint fedBlock;
int entertained;
uint entertainedBlock;
int rested;
uint restedBlock;
uint blockBorn;
bool initiated;
}
mapping (address => DoroidotchiStruct) public doroidotchi;
uint doroidotchiCount = 1;
mapping (uint => address) public doroidotchiMap;
function createDoroidotchi(string doroidotchiName) external {
address parent = msg.sender;
require (!doroidotchi[parent].initiated);
require (bytes(doroidotchiName).length > 0);
doroidotchi[parent].initiated = true;
doroidotchi[parent].doroidotchiName = doroidotchiName;
doroidotchi[parent].fed = 5000;
doroidotchi[parent].fedBlock = block.number;
doroidotchi[parent].entertained = 7000;
doroidotchi[parent].entertainedBlock = block.number;
doroidotchi[parent].rested = 90000;
doroidotchi[parent].restedBlock = block.number;
doroidotchi[parent].blockBorn = block.number;
doroidotchiMap[doroidotchiCount++] = msg.sender;
}
function destroyDoroidotchi() public {
require (doroidotchi[msg.sender].initiated);
delete doroidotchi[msg.sender];
}
function feed() external {
require (doroidotchi[msg.sender].initiated);
require(!hasDoroidotchiDied(msg.sender));
doroidotchi[msg.sender].fed = hungerPerFeed + doroidotchi[msg.sender].fed - calcHungerSince(msg.sender);
doroidotchi[msg.sender].fedBlock = block.number;
}
function play() external {
require (doroidotchi[msg.sender].initiated);
require(!hasDoroidotchiDied(msg.sender));
doroidotchi[msg.sender].entertained = boredomPerEntertainment + doroidotchi[msg.sender].entertained - calcBoredomSince(msg.sender);
doroidotchi[msg.sender].entertainedBlock = block.number;
}
function sleep() external {
require (doroidotchi[msg.sender].initiated);
require(!hasDoroidotchiDied(msg.sender));
doroidotchi[msg.sender].rested = energyPerSleep + doroidotchi[msg.sender].rested - calcEnergySince(msg.sender);
doroidotchi[msg.sender].restedBlock = block.number;
}
function getDoroidotchi(address parent) public view
returns (
string doroidotchiName,
int fed,
int entertained,
int rested,
uint age,
bool isDead
) {
require (doroidotchi[parent].initiated);
return (
doroidotchi[parent].doroidotchiName,
doroidotchi[parent].fed - calcHungerSince(parent),
doroidotchi[parent].entertained - calcBoredomSince(parent),
doroidotchi[parent].rested - calcEnergySince(parent),
block.number - doroidotchi[parent].blockBorn,
hasDoroidotchiDied(parent)
);
}
function calcHungerSince(address parent) public view returns (int amount){
return int(block.number - doroidotchi[parent].fedBlock) * hungerPerBlock;
}
function calcBoredomSince(address parent) public view returns (int amount){
return int(block.number - doroidotchi[parent].entertainedBlock) * boredomPerBlock;
}
function calcEnergySince(address parent) public view returns (int amount){
return int(block.number - doroidotchi[parent].restedBlock) * energyPerBlock;
}
function hasDoroidotchiDied(address parent) public view returns (bool isDead) {
require (doroidotchi[parent].initiated);
int fed = doroidotchi[parent].fed - calcHungerSince(parent);
int entertained = doroidotchi[parent].entertained - calcBoredomSince(parent);
int rested = doroidotchi[parent].rested - calcEnergySince(parent);
if ((fed <= 0) || (entertained <= 0) || (rested <= 0) ) {
return true;
} else {
return false;
}
}
function transferDoroidotchi(address newParent) public returns (bool isTransfered) {
require (doroidotchi[msg.sender].initiated);
require (!doroidotchi[newParent].initiated);
doroidotchi[newParent] = doroidotchi[msg.sender];
delete doroidotchi[msg.sender];
return true;
}
function getDoroidotchiListElement(uint listPosition) public view returns (address doroidotchiAddress){
return doroidotchiMap[listPosition];
}
}
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