diff --git a/include/fctypes.h b/include/fctypes.h
index 77613bc..80aae32 100644
--- a/include/fctypes.h
+++ b/include/fctypes.h
@@ -146,12 +146,19 @@ typedef GoInt64_ Handle;
  * String Slice Handle
  */
 typedef Handle Strings__Handle;
-typedef Handle core__SecKey;
-typedef Handle core__PubKey;
-typedef Handle core__Address;
-typedef Handle core__AddressIterator;
-typedef Handle core__TxnSigner;
-typedef Handle core__TxnSignerIterator;
-typedef Handle core__CryptoAccount;
 
+/**
+ * AltcoinPlugin__Handle Handle, interface core.AltcoinPlugin
+ */
+typedef Handle AltcoinPlugin__Handle;
+
+/**
+ * TxnSigner__Handle Handle, interface core.TxnSigner
+ */
+typedef Handle TxnSigner__Handle;
+
+/**
+ * Wallet__Handle Handle, interface core.Wallet
+ */
+typedef Handle Wallet__Handle;
 #endif
diff --git a/lib/cgo/libfc_handle.go b/lib/cgo/libfc_handle.go
index af7a695..4dcab1d 100644
--- a/lib/cgo/libfc_handle.go
+++ b/lib/cgo/libfc_handle.go
@@ -1,5 +1,9 @@
 package main
 
+import (
+	"github.com/fibercrypto/fibercryptowallet/src/core"
+)
+
 /*
 
   #include <string.h>
@@ -60,3 +64,43 @@ func lookupStringsHandle(handle C.Strings__Handle) ([]string, bool) {
 	}
 	return nil, false
 }
+
+func lookupAltcoinPluginHandle(handle C.AltcoinPlugin__Handle) (*core.AltcoinPlugin, bool) {
+	obj, ok := lookupHandle(C.Handle(handle))
+	if ok {
+		if obj, isOK := (obj).(*core.AltcoinPlugin); isOK {
+			return obj, true
+		}
+	}
+	return nil, false
+}
+
+func registerAltcoinPluginHandle(obj *core.AltcoinPlugin) C.AltcoinPlugin__Handle {
+	return (C.AltcoinPlugin__Handle)(registerHandle(obj))
+}
+
+func lookupWalletHandle(handle C.Wallet__Handle) (*core.Wallet, bool) {
+	obj, ok := lookupHandle(C.Handle(handle))
+	if ok {
+		if obj, isOK := (obj).(*core.Wallet); isOK {
+			return obj, true
+		}
+	}
+	return nil, false
+}
+
+func registerWalletHandle(obj *core.Wallet) C.Wallet__Handle {
+	return (C.Wallet__Handle)(registerHandle(obj))
+}
+func lookupTxnSignerHandle(handle C.TxnSigner__Handle) (*core.TxnSigner, bool) {
+	obj, ok := lookupHandle(C.Handle(handle))
+	if ok {
+		if obj, isOK := (obj).(*core.TxnSigner); isOK {
+			return obj, true
+		}
+	}
+	return nil, false
+}
+func registerTxnSignerHandle(obj *core.TxnSigner) C.TxnSigner__Handle {
+	return (C.TxnSigner__Handle)(registerHandle(obj))
+}
diff --git a/lib/cgo/util.pluginutil.go b/lib/cgo/util.pluginutil.go
index b48cc2b..274f488 100644
--- a/lib/cgo/util.pluginutil.go
+++ b/lib/cgo/util.pluginutil.go
@@ -1,6 +1,11 @@
 package main
 
-import "github.com/fibercrypto/fibercryptowallet/src/util"
+import (
+	"unsafe"
+
+	core "github.com/fibercrypto/fibercryptowallet/src/core"
+	util "github.com/fibercrypto/fibercryptowallet/src/util"
+)
 
 /*
 
@@ -12,10 +17,46 @@ import "github.com/fibercrypto/fibercryptowallet/src/util"
 import "C"
 
 //export FC_util_AltcoinCaption
-func FC_util_AltcoinCaption(_arg0 string, _arg1 *C.GoString_) (____error_code uint32) {
-	callNode()
-	arg0 := string(_arg0)
-	arg1 := util.AltcoinCaption(arg0)
-	copyString(arg1, _arg1)
+func FC_util_AltcoinCaption(_ticker string, _arg1 *C.GoString_) (____error_code uint32) {
+	ticker := _ticker
+	__arg1 := util.AltcoinCaption(ticker)
+	copyString(__arg1, _arg1)
+	return
+}
+
+//export FC_util_AltcoinQuotient
+func FC_util_AltcoinQuotient(_ticker string, _arg1 *uint64) (____error_code uint32) {
+	ticker := _ticker
+	__arg1, ____return_err := util.AltcoinQuotient(ticker)
+	____error_code = libErrorCode(____return_err)
+	if ____return_err == nil {
+		*_arg1 = __arg1
+	}
+	return
+}
+
+//export FC_util_RegisterAltcoin
+func FC_util_RegisterAltcoin(_p *C.AltcoinPlugin__Handle) (____error_code uint32) {
+	__p, okp := lookupAltcoinPluginHandle(*_p)
+	if !okp {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	p := *__p
+	util.RegisterAltcoin(p)
+	return
+}
+
+//export FC_util_LookupSignerByUID
+func FC_util_LookupSignerByUID(_wlt *C.Wallet__Handle, _id *C.core__UID, _arg2 *C.TxnSigner__Handle) (____error_code uint32) {
+	__wlt, okwlt := lookupWalletHandle(*_wlt)
+	if !okwlt {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	wlt := *__wlt
+	id := *(*core.UID)(unsafe.Pointer(_id))
+	__arg2 := util.LookupSignerByUID(wlt, id)
+	*_arg2 = registerTxnSignerHandle(&__arg2)
 	return
 }