Added general Pipe API

ethpipe/config.go

@@ -0,0 +1,47 @@
+package ethpipe
+
+import (
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethutil"
+)
+
+var cnfCtr = ethutil.Hex2Bytes("661005d2720d855f1d9976f88bb10c1a3398c77f")
+
+type object struct {
+	*ethstate.StateObject
+}
+
+func (self object) StorageString(str string) *ethutil.Value {
+	if ethutil.IsHex(str) {
+		return self.Storage(ethutil.Hex2Bytes(str[2:]))
+	} else {
+		return self.Storage(ethutil.RightPadBytes([]byte(str), 32))
+	}
+}
+
+func (self object) Storage(addr []byte) *ethutil.Value {
+	return self.StateObject.GetStorage(ethutil.BigD(addr))
+}
+
+type config struct {
+	pipe *Pipe
+}
+
+func (self *config) Get(name string) object {
+	configCtrl := self.pipe.World().safeGet(cnfCtr)
+	var addr []byte
+
+	switch name {
+	case "NameReg":
+		addr = []byte{0}
+	default:
+		addr = ethutil.RightPadBytes([]byte(name), 32)
+	}
+
+	objectAddr := configCtrl.GetStorage(ethutil.BigD(addr))
+	return object{self.pipe.World().safeGet(objectAddr.Bytes())}
+}
+
+func (self *config) Exist() bool {
+	return self.pipe.World().Get(cnfCtr) != nil
+}