Smartcontract (#39)

* deleted transfer_output added asset type and transaction result to core

* removed writing 0x00 when buffer length is 0

* Refactored emit into VM package + moved tx to own package.

* implemented transaction along with claimTransaction.

* refactored naming of transaction + added decode address for uint160 types

* removed unnecessary folder and files.

* transaction/smartcontract logic

* bumped version 0.24.0

pkg/util/uint160_test.go

@@ -1 +1,22 @@
 package util
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUint160FromToAddress(t *testing.T) {
+	addrs := []string{
+		"AMLr1CpPQtbEdiJdriX1HpRNMZUwbU2Huj",
+		"AKtwd3DRXj3nL5kHMUoNsdnsCEVjnuuTFF",
+		"AMxkaxFVG8Q1BhnB4fjTA5ZmUTEnnTMJMa",
+	}
+	for _, addr := range addrs {
+		val, err := Uint160DecodeAddress(addr)
+		if err != nil {
+			t.Fatal(err)
+		}
+		assert.Equal(t, addr, val.Address())
+	}
+}