1 files changed, 65 insertions, 0 deletions
diff --git a/ethutil/natspec/natspec.go b/ethutil/natspec/natspec.go
new file mode 100644
index 000000000..00e6f8720
--- /dev/null
+++ b/ethutil/natspec/natspec.go
@@ -0,0 +1,65 @@
+package natspec
+
+import (
+	"github.com/obscuren/otto"
+	"io/ioutil"
+)
+
+type NatSpec struct {
+	jsvm *otto.Otto
+}
+
+func NewNATSpec(transaction string) (self *NatSpec, err error) {
+
+	self = new(NatSpec)
+	self.jsvm = otto.New()
+	code, err := ioutil.ReadFile("natspec.js")
+	if err != nil {
+		return
+	}
+
+	_, err = self.jsvm.Run(string(code))
+	if err != nil {
+		return
+	}
+	_, err = self.jsvm.Run("var natspec = require('natspec');")
+	if err != nil {
+		return
+	}
+
+	self.jsvm.Run("var transaction = " + transaction + ";")
+
+	return
+}
+
+func (self *NatSpec) SetDescription(desc string) (err error) {
+
+	_, err = self.jsvm.Run("var expression = \"" + desc + "\";")
+	return
+
+}
+
+func (self *NatSpec) SetABI(abi string) (err error) {
+
+	_, err = self.jsvm.Run("var abi = " + abi + ";")
+	return
+
+}
+
+func (self *NatSpec) SetMethod(method string) (err error) {
+
+	_, err = self.jsvm.Run("var method = '" + method + "';")
+	return
+
+}
+
+func (self *NatSpec) Parse() string {
+
+	self.jsvm.Run("var call = {method: method,abi: abi,transaction: transaction};")
+	value, err := self.jsvm.Run("natspec.evaluateExpression(expression, call);")
+	if err != nil {
+		return err.Error()
+	}
+	return value.String()
+
+}