add exchanger

Exchanger/exchanger.go

@@ -0,0 +1,51 @@
+package Exchanger
+
+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 BuyZaCoin(gasCount int){
+	playerOwner := runtime.GetScriptContainer().Sender
+
+	playerBalance := gas.BalanceOf(playerOwner)
+
+	if playerBalance < gasCount {
+		panic("Insufficient funds")
+	}
+
+	contractHash := runtime.GetExecutingScriptHash()
+	transferredGas := gas.Transfer(playerOwner, contractHash, gasCount, nil).(bool)
+	if !transferredGas {
+                panic("failed to transfer gas")
+        }
+	transferredZaCoin := contract.Call(zaCoinHash, "transfer", contract.All, contractHash, playerBalance, gasCount, nil).(bool)
+
+	if !transferredZaCoin {
+		panic("failed to transfer zaCoins")
+	}
+}

Exchanger/exchanger.yml

@@ -0,0 +1,6 @@
+name: Exchanger
+sourceurl: http://example.com/
+safemethods: []
+supportedstandards: []
+permissions:
+    - methods: '*'

Exchanger/go.mod

@@ -0,0 +1,4 @@
+module Exchanger
+require (
+	github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20231020160724-c3955f87d1b5
+)