principal game cost & time parameters

[peersky]

Currently we only enforce timeout limits, which are however bypassed if all players made a move.

After analysing game theoretic risks in our paper, we need to add additional security constraint: ranking instance should have a time constant parameter added which sets minimal time that game must last in order to mint a competence token.

In order to achieve this we need to modify contract initialization parameters:

• Add principalCost parameter which will be the baseline of what game must collect from participants
• Add principalTimeConstant parameter which will be minimal time required to finalize tournament
• Move joinGamePrice parameter to createGame function and store it within IRankifyInstanceCommons.RInstance
• Move minPlayerSize parameter to createGame function
• Move maxPlayerSize parameter to createGame function
• Add minGameTime parameter to createGame function
• Move RInstanceSettings.gamePrice to RInstance
• Move RInstanceSettings.minPlayerSize to RInstance
• Move RInstanceSettings.maxPlayerSize to RInstance
• Add gamePrice parameter to RInstanceSettings
• Add principalTimeConstant parameter to RInstanceSettings
• Add minGameTime parameter to RInstance
• Remove RankifyInstanceGameOwnersFacet facet from ArguableVotingDistribution.sol , delete facet file & related tests

When creating a game

• Calculate gamePrice = principalCost * (principalTimeConstant / minGameTime).
• Create game price for a creator is calculated as a difference between principal cost and what will minimal participants will pay: abs(minPlayerSize*joinGamePrice - gamePrice
• Require that minGameTime is in range of [1/8th...x8] of principalTimeConstant to avoid boundary cases.
• Require principalTimeConstant % minGameTime == 0 (or minGameTime % principalTimeConstant == 0 if minGameTime > principalTimeConstant) to avoid division errors.
• record joinGamePrice to RInstance.joinGamePrice
• record minGameTime to RInstance.minGameTime

When players joining the game

• get joinGamePrice from RInstance for a specific gameId
• get minPlayerSize from RInstance for a specific gameId
• get maxPlayerSize from RInstance for a specific gameId

When game began:

• Record game start timestamp
• closeGame function reverts ifLibTBG.GameInstance.turnStartedAt + RInstance.minGameTime > block.timestamp