auction/Craps/craps.go

package Craps

import (
	"github.com/nspcc-dev/neo-go/pkg/interop"
	"github.com/nspcc-dev/neo-go/pkg/interop/contract"
	"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
	"github.com/nspcc-dev/neo-go/pkg/interop/storage"
)

const (
	zaCoinHashKey = "zaCoinHash"
)

func _deploy(data interface{}, isUpdate bool) {
	if isUpdate {
		return
	}

	args := data.(struct {
		zaCoinHash interop.Hash160
	})

	if len(args.zaCoinHash) != interop.Hash160Len {
                panic("invalid hash of zaCoin contract")
        }


	ctx := storage.GetContext()
	storage.Put(ctx, zaCoinHashKey, args.zaCoinHash)
}

func PlayCraps(bet int, firstSum int, secondSum int) {
	ctx := storage.GetContext()
	playerOwner := runtime.GetScriptContainer().Sender
	playerContract := runtime.GetExecutingScriptHash()

	if bet <= 0 {
		panic("Invalid bet amount")
	}

	zaCoinHash := storage.Get(ctx, zaCoinHashKey).(interop.Hash160)
	playerBalance := contract.Call(zaCoinHash, "balanceOf", contract.ReadStates, playerOwner).(int)
	if playerBalance < bet {
		panic("Insufficient funds")
	}


	isWin := isWinner(firstSum, secondSum)
	if (isWin){
		changePlayerBalance(playerContract, playerOwner, bet)
		runtime.Notify("gameResult", int(1))
	} else {
		changePlayerBalance(playerOwner, playerContract, bet)
		runtime.Notify("gameResult", int(0))
	}
	playerBalance = contract.Call(zaCoinHash, "balanceOf", contract.ReadStates, playerOwner).(int)
        runtime.Notify("playerBalance", playerBalance)
}

func isWinner(firstSum int, secondSum int) bool {
	if (!((firstSum >= 2 && firstSum <= 12) && (secondSum >= 2 && secondSum <= 12))){
		panic("first and second sum should be from 2 to 12")
	}

	sum := 0
	for i:=0; i<2; i++ {
		crap := (runtime.GetRandom() % 6) + 1
		runtime.Notify("Crup number", i+1)
		runtime.Notify("Random number", crap)
		sum += crap
	}

	return sum == firstSum || sum == secondSum
}


func OnNEP17Payment(from interop.Hash160, amount int, data any) {
	ctx := storage.GetContext()
	zaCoinHash := storage.Get(ctx, zaCoinHashKey).(interop.Hash160)

	callingHash := runtime.GetCallingScriptHash()
	if !callingHash.Equals(zaCoinHash) {
		panic("only ZC is accepted")
	}
}

func changePlayerBalance(sender interop.Hash160, recipient interop.Hash160, balanceChange int) {
	ctx := storage.GetContext()
        zaCoinHash := storage.Get(ctx, zaCoinHashKey).(interop.Hash160)

	transferred := contract.Call(zaCoinHash, "transfer", contract.All, sender, recipient, balanceChange, nil).(bool)
	if !transferred {
		panic("failed to transfer zaCoins")
	}
}