diff --git a/contract.go b/contract.go
index 75d9f68..1c3a1a7 100644
--- a/contract.go
+++ b/contract.go
@@ -6,7 +6,6 @@ import (
 	"github.com/go-resty/resty/v2"
 	"github.com/nspcc-dev/neo-go/pkg/interop"
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/gas"
-	"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
 	"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
 	"github.com/nspcc-dev/neo-go/pkg/interop/storage"
 	"strconv"
@@ -119,8 +118,19 @@ func Transfer(address interop.Hash160, amount int, fromToken string, toToken str
 
 	UpdateWallet(address, wallet)
 
-	runtime.Log("Exchange successful: " + std.Itoa10(amount) + " " + fromToken +
-		" exchanged for " + std.Itoa10(int(convertedAmount)) + " " + toToken)
+	runtime.Log("Exchange successful: " + strconv.Itoa(amount) + " " + fromToken +
+		" exchanged for " + strconv.Itoa(int(convertedAmount)) + " " + toToken)
+
+	return true
+}
+
+func printBalance(address interop.Hash160) bool {
+	wallet := GetWallet(address)
+	runtime.Log("Balance: ")
+
+	for key, value := range wallet.Tokens {
+		runtime.Log(key + ": " + strconv.Itoa(value))
+	}
 
 	return true
 }