evm: fix non-determinism (#352)

* evm: fix non-determinism

* fixes

* typo

* fix tests

* use Storage slice

* more fixes

* lint

* merge development

* additional tests

types/code.go

@@ -1,40 +1,12 @@
 package types
 
-import (
-	"fmt"
-
-	ethcmn "github.com/ethereum/go-ethereum/common"
-)
-
 // ----------------------------------------------------------------------------
-// Code & Storage
+// Code
 // ----------------------------------------------------------------------------
 
-type (
-	// Code is account Code type alias
-	Code []byte
-	// Storage is account storage type alias
-	Storage map[ethcmn.Hash]ethcmn.Hash
-)
+// Code is account Code type alias
+type Code []byte
 
 func (c Code) String() string {
 	return string(c)
 }
-
-func (c Storage) String() (str string) {
-	for key, value := range c {
-		str += fmt.Sprintf("%X : %X\n", key, value)
-	}
-
-	return
-}
-
-// Copy returns a copy of storage.
-func (c Storage) Copy() Storage {
-	cpy := make(Storage)
-	for key, value := range c {
-		cpy[key] = value
-	}
-
-	return cpy
-}