From 3db9c8007086e0735695a6477c21056737519db9 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Thu, 4 Dec 2014 17:13:23 +0100
Subject: [PATCH] Removed mutan. Closes #183

---
 ethutil/script_unix.go    | 42 ++++++---------------------------------
 ethutil/script_windows.go | 23 +--------------------
 vm/vm_test.go             | 15 ++++----------
 3 files changed, 11 insertions(+), 69 deletions(-)

diff --git a/ethutil/script_unix.go b/ethutil/script_unix.go
index 6827d4e2f..9250dda57 100644
--- a/ethutil/script_unix.go
+++ b/ethutil/script_unix.go
@@ -2,47 +2,17 @@
 
 package ethutil
 
-import (
-	"fmt"
-	"strings"
-
-	"github.com/ethereum/serpent-go"
-	"github.com/obscuren/mutan"
-	"github.com/obscuren/mutan/backends"
-)
+import "github.com/ethereum/serpent-go"
 
 // General compile function
 func Compile(script string, silent bool) (ret []byte, err error) {
 	if len(script) > 2 {
-		line := strings.Split(script, "\n")[0]
-
-		if len(line) > 1 && line[0:2] == "#!" {
-			switch line {
-			case "#!serpent":
-				byteCode, err := serpent.Compile(script)
-				if err != nil {
-					return nil, err
-				}
-
-				return byteCode, nil
-			}
-		} else {
-
-			compiler := mutan.NewCompiler(backend.NewEthereumBackend())
-			compiler.Silent = silent
-			byteCode, errors := compiler.Compile(strings.NewReader(script))
-			if len(errors) > 0 {
-				var errs string
-				for _, er := range errors {
-					if er != nil {
-						errs += er.Error()
-					}
-				}
-				return nil, fmt.Errorf("%v", errs)
-			}
-
-			return byteCode, nil
+		byteCode, err := serpent.Compile(script)
+		if err != nil {
+			return nil, err
 		}
+
+		return byteCode, nil
 	}
 
 	return nil, nil
diff --git a/ethutil/script_windows.go b/ethutil/script_windows.go
index ef239cd51..1dedc5f60 100644
--- a/ethutil/script_windows.go
+++ b/ethutil/script_windows.go
@@ -2,31 +2,10 @@
 
 package ethutil
 
-import (
-	"fmt"
-	"strings"
-
-	"github.com/obscuren/mutan"
-	"github.com/obscuren/mutan/backends"
-)
-
 // General compile function
 func Compile(script string, silent bool) (ret []byte, err error) {
 	if len(script) > 2 {
-		compiler := mutan.NewCompiler(backend.NewEthereumBackend())
-		compiler.Silent = silent
-		byteCode, errors := compiler.Compile(strings.NewReader(script))
-		if len(errors) > 0 {
-			var errs string
-			for _, er := range errors {
-				if er != nil {
-					errs += er.Error()
-				}
-			}
-			return nil, fmt.Errorf("%v", errs)
-		}
-
-		return byteCode, nil
+		return nil, nil
 	}
 
 	return nil, nil
diff --git a/vm/vm_test.go b/vm/vm_test.go
index 19aa171a6..84ebf378f 100644
--- a/vm/vm_test.go
+++ b/vm/vm_test.go
@@ -13,7 +13,6 @@ import (
 	"github.com/ethereum/go-ethereum/state"
 	"github.com/ethereum/go-ethereum/trie"
 	checker "gopkg.in/check.v1"
-	// "github.com/obscuren/mutan"
 )
 
 type VmSuite struct{}
@@ -68,24 +67,18 @@ func setup(level logger.LogLevel, typ Type) (*Closure, VirtualMachine) {
 }
 
 func (s *VmSuite) TestDebugVm(c *checker.C) {
-	// if mutan.Version < "0.6" {
-	// 	t.Skip("skipping for mutan version", mutan.Version, " < 0.6")
-	// }
 	closure, vm := setup(logger.DebugLevel, DebugVmTy)
 	ret, _, e := closure.Call(vm, nil)
 	c.Assert(e, checker.NotNil)
-	c.Skip("Depends on mutan")
+	c.Skip("Depends on mutan. Requires serpent implementation")
 	c.Assert(ret, checker.DeepEquals, big9)
 }
 
 func (s *VmSuite) TestVm(c *checker.C) {
-	// if mutan.Version < "0.6" {
-	// 	t.Skip("skipping for mutan version", mutan.Version, " < 0.6")
-	// }
 	closure, vm := setup(logger.DebugLevel, StandardVmTy)
 	ret, _, e := closure.Call(vm, nil)
 	c.Assert(e, checker.NotNil)
-	c.Skip("Depends on mutan")
+	c.Skip("Depends on mutan. Requires serpent implementation")
 	c.Assert(ret, checker.DeepEquals, big9)
 }
 
@@ -142,7 +135,7 @@ func (s *VmSuite) TestBuildInSha256(c *checker.C) {
 	`, DebugVmTy)
 
 	exp := crypto.Sha256(ethutil.LeftPadBytes([]byte{42}, 32))
-	c.Skip("Depends on mutan")
+	c.Skip("Depends on mutan. Requires serpent implementation")
 	c.Assert(ret, checker.DeepEquals, exp)
 }
 
@@ -157,7 +150,7 @@ func (s *VmSuite) TestBuildInRipemd(c *checker.C) {
 	`, DebugVmTy)
 
 	exp := ethutil.RightPadBytes(crypto.Ripemd160(ethutil.LeftPadBytes([]byte{42}, 32)), 32)
-	c.Skip("Depends on mutan")
+	c.Skip("Depends on mutan. Requires serpent implementation")
 	c.Assert(ret, checker.DeepEquals, exp)
 }