/
rock_paper_ether.sol
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/
rock_paper_ether.sol
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pragma solidity ^0.4.11;
contract RockPaperScissors {
enum Stages {
playerOneThrow,
playerTwoThrow,
playerOneReveal,
playerTwoReveal,
determineWinner
}
Stages public stage = Stages.playerOneThrow;
modifier atStage(Stages _stage) {
require(stage == _stage);
_;
}
function nextStage() internal {
stage = Stages(uint(stage) + 1);
}
Player public player1;
Player public player2;
uint public bet = 0;
uint public resetTime;
address public winner;
struct Player{
address addy;
bytes32 commitHash;
uint commitTime;
bytes32 gameThrow;
uint revealTime;
}
function RockPaperScissors(address _player1, address _player2, uint _bet) {
player1.addy = _player1;
player2.addy = _player2;
bet = _bet;
}
modifier includesPayment(){if(msg.value == bet){ _; }else{ throw; } }
function playerOneCommit(bytes32 commitHash) payable atStage(Stages.playerOneThrow) includesPayment() {
if(msg.sender == player1.addy) {
player1.commitHash = commitHash;
player1.commitTime = now;
resetTime = 0;
nextStage();
} else {
throw;
}
}
function playerTwoCommit(bytes32 commitHash) payable atStage(Stages.playerTwoThrow) includesPayment() {
if(msg.sender == player2.addy) {
player2.commitHash = commitHash;
player2.commitTime = now;
nextStage();
} else {
throw;
}
}
function playerOneReveal(bytes32 gameThrow, bytes32 secret) atStage(Stages.playerOneReveal) {
bytes32 commitHash = sha3(gameThrow, secret);
if(commitHash == player1.commitHash) {
player1.gameThrow = gameThrow;
player1.revealTime = now;
nextStage();
} else {
throw;
}
}
function playerTwoReveal(bytes32 gameThrow, bytes32 secret) atStage(Stages.playerTwoReveal) {
bytes32 commitHash = sha3(gameThrow, secret);
if(commitHash == player2.commitHash) {
player2.gameThrow = gameThrow;
player2.revealTime = now;
nextStage();
determineWinner();
} else {
throw;
}
}
function determineWinner() atStage(Stages.determineWinner) {
if(player1.gameThrow == 1 && player2.gameThrow == 2) {
winner = player2.addy;
} else if(player1.gameThrow == 2 && player2.gameThrow == 3) {
winner = player2.addy;
} else if(player1.gameThrow == 3 && player2.gameThrow == 1) {
winner = player2.addy;
} else if (player1.gameThrow != player2.gameThrow) {
winner = player1.addy;
}
if(winner != 0x0) {
winner.transfer(this.balance);
} else { //tie
reset();
}
}
function returnFunds(){
if(stage == Stages.playerOneThrow){
if(player1.commitHash == 0 && now > resetTime + 3600){
splitFunds();
}
}
if(stage == Stages.playerTwoThrow){
if(now > player1.commitTime + 3600){
player1.addy.transfer(this.balance);
}
}
if(stage == Stages.playerOneReveal){
if(now > player2.commitTime + 3600){
player2.addy.transfer(this.balance); // or splitFunds() ?
}
}
if(stage == Stages.playerTwoReveal){
if(now > player1.revealTime + 3600){
player1.addy.transfer(this.balance);
}
}
}
function splitFunds() private{
player1.addy.transfer(this.balance/2);
player2.addy.transfer(this.balance/2);
reset();
}
function reset() private{
delete player1.commitHash;
delete player1.gameThrow;
delete player1.commitTime;
delete player1.revealTime;
delete player2.commitHash;
delete player2.gameThrow;
delete player2.commitTime;
delete player2.revealTime;
resetTime = now;
stage = Stages.playerOneThrow;
}
}