Steal or Split Dapp

What is the game?
It is a two player game where each player is asked to bet some amount(X, Y) to play the game.
Based on X and Y, Smart contract would generate a Reward Matrix, on which game will be played.

What is the Reward Matrix?
R(X,Y,K) =>

(X\Y)	Split	Steal
Split	(X+Y)/2	0 \ Min(X+Y, K*Y)
Steal	Min(X+Y, K*X) \ 0	Max(0, (2-K)*((X-Y)/2)

where,

X & Y are bet amounts by PlayerX and PlayerY respectively
2 >= K > 1, K is Reward Factor

How to read Reward Matrix case by case?

If X chooses to SPLIT and Y also chooses to SPLIT, then they win (X+Y)/ 2 each, thus player betting lower wins.
If X chooses to SPLIT and Y chooses to STEAL, then Y gains K times of Y (Capped by X+Y) and X gets 0, thus the higher you bet higher you win.
If X chooses to STEAL and Y chooses to SPLIT, then X gains K times of X (Capped by X+Y) and Y gets 0, thus the higher you bet higher you win.
If X chooses to STEAL and Y also chooses to STEAL, then they win (2-K) times of (X-Y)/2, thus player betting higher gets some part back.
- Also note that reward in this case inversely proportional to Win if only one of thems steals
- Higher the reward in Single STEAL case Lower the reward in Both STEAL case
If a player's opponent gets disqualified and the player not, then player gains K times of player's bet (Capped by X+Y) irrespective of player's choice.
If both players get disqualified, both loose complete bet.

GAME PLAY

Game has 3 Phases

Registeration, Commit Bets & Submit Encrypted Choice
- Player will submit their bet amounts and encrypted choices. **(THIS WOULD COST GAS)**
- This can be done in two ways,
  - Either by starting a new game.
  - Or by Joining an exiting game.

Reveal choice
- Player will submit unencrypted choice
  - i.e. the number (even or odd) they actually chose in previous round. **(THIS WOULD COST GAS)**
- Contract would evaluate the encryption of the choice and compare with previously submitted choice.
- If Both do not match, player will be marked disqualified for that game and an event will be fired.(EVENT)

Claim Reward
1. Contract would reward player according to Reward Matrix. **(THIS WOULD COST GAS)**
2. Reward would be given after deducting Game Fees(F) from Reward amount

Abandon Game

Player who started game can abandon it if no body joined the game.

If Player abandon's game before Stage Timeout then,
- Player's bet amount is refunded dedecuting Game Fees(F)
else
- Player's entire bet amount is refunded.
So it is advisable to let you game be open till it expires.

Stage Timeout

Stage Timeout is used to unlock deadlock situations like,

If a game is in revealing stage since a long time because,
- Either both players did not reveal their choices, OR
- One of the players did not reveal choice
then, Admin can diqualify player(s) who did not reveal after Stage Timeout.

If a game is in claim reward stage since a long time and,
- Either both players did not claim their rewards, OR
- One of the players did not claim reward
then, Admin can diqualify player(s) who did not claim reward.
- This essentially means that Player should claim reward within Stage Timeout amount of time.
- This is done so that the ether doesn't get locked in contract address

How is this game Provably Fair?

Contract code can be found here.
All transactions on contract can be found here.

Welcome to "SPLIT or STEAL" game on BLOCKCHAIN

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What is the game?

What is the Reward Matrix?

How to read Reward Matrix case by case?

GAME PLAY

Game has 3 Phases

Abandon Game

Stage Timeout

How is this game Provably Fair?