Overview

zkShuffles SDK provides IZKShuffle as a standard interface to interact with shuffle manager contract. The goal is to simplify zk proof generation and key management. With IZKShuffle interface, game developer can build zk game without any experience in cryptography including zero knowledge proof, and thus can focus on the game logic.

IZKShuffle

joinGame

async joinGame(gameId: number): Promise<number>[src]

Joins the game specified by gameId, and returns the player ID per game.

Parameters:

• gameId : number

Return:

• playerId : number

checkTurn

async checkTurn(gameId: number, startBlock: any = 0): Promise<GameTurn>[src]

Queries a player's current turn in game gameId, specified by GameTurn:

enum GameTurn {
  NOP, // Not Your Turn
  Shuffle, // Shuffle Turn
  Deal, // Deal Decrypt Turn
  Open, // Open Card
  Error, // Game Error
  Complete, // Game End
}

Parameters:

• gameId : number

Return:

• turn : GameTurn

shuffle

async shuffle(gameId: number): Promise<boolean>[src]

Shuffles the deck in game gameId and submits a proof on-chain.

Parameters:

• gameId : number

Return:

• result : boolean. True is shuffle success, otherwise False.

draw

async draw(gameId: number): Promise<boolean>[src]

Draws a card in game gameId, and submits a proof on-chain.

Parameters:

• gameId : number

Return:

• result : boolean. True is draw success, otherwise False

open

async open(gameId: number, cardIds: number[]): Promise<number[]>[src]

Opens cards specified by cardIds and submits a proof on-chain.

open automatically sends data to blockchain, such that it is not suitable for opening cards that are only visible to players. Use openOffchain instead in this case.

Parameters:

• gameId : number
• cardIds : number[]

Return:

• cards : the index of decrypted cards if open successfully; otherwise -1

openOffchain

async openOffchain(gameId: number, cardIds: number[]): Promise<number[]>[src]

Opens cards specified by cardIds. Returns card's original value if open success, otherwise returns -1 for the card.

Different from open that sends the decryption onchain, openOffchain only shows decrypted card on user's machine and does not send it to blockchain.

Parameters:

• gameId : number
• cardIds : number[]

Return:

• cards : number[]

getPlayerId

async getPlayerId(gameId: number): Promise<number>[src]

Gets player's id from onchain game gameId.

Parameters:

• gameId : number

Return:

• playerId : number

queryCards

async queryCards(gameId: number, cardIds: number[]): Promise<number[]>[src]

Gets the card value specified by cardIds from on-chain game gameId.

Parameters:

• gameId : number
• cardIds : number[]

Return:

• cards : number[]