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/fixed8.go

@@ -0,0 +1,31 @@
+package util
+
+import (
+	"bytes"
+	"strconv"
+)
+
+// Fixed8 represents a fixed-point number with precision 10^-8.
+type Fixed8 int64
+
+// String implements the Stringer interface.
+func (f Fixed8) String() string {
+	buf := new(bytes.Buffer)
+	val := int64(f)
+	if val < 0 {
+		buf.WriteRune('-')
+		val = -val
+	}
+	str := strconv.FormatInt(val/100000000, 10)
+	buf.WriteString(str)
+	val %= 100000000
+	if val > 0 {
+		buf.WriteRune('.')
+		str = strconv.FormatInt(val, 10)
+		for i := len(str); i < 8; i++ {
+			buf.WriteRune('0')
+		}
+		buf.WriteString(str)
+	}
+	return buf.String()
+}