diff --git a/lib/cgo/util.sign.go b/lib/cgo/util.sign.go
new file mode 100644
index 0000000..4c87503
--- /dev/null
+++ b/lib/cgo/util.sign.go
@@ -0,0 +1,163 @@
+package main
+
+import (
+	core "github.com/fibercrypto/fibercryptowallet/src/core"
+	util "github.com/fibercrypto/fibercryptowallet/src/util"
+	"unsafe"
+)
+
+/*
+
+  #include <string.h>
+  #include <stdlib.h>
+
+  #include "fctypes.h"
+*/
+import "C"
+
+//export FC_util_AttachSignService
+func FC_util_AttachSignService(_signer *C.TxnSigner__Handle) (____error_code uint32) {
+	__signer, oksigner := lookupTxnSignerHandle(*_signer)
+	if !oksigner {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	signer := *__signer
+	____return_err := util.AttachSignService(signer)
+	____error_code = libErrorCode(____return_err)
+	if ____return_err == nil {
+	}
+	return
+}
+
+//export FC_util_LookupSignService
+func FC_util_LookupSignService(_signerID *C.core__UID, _arg1 *C.TxnSigner__Handle) (____error_code uint32) {
+	signerID := *(*core.UID)(unsafe.Pointer(_signerID))
+	__arg1 := util.LookupSignService(signerID)
+	*_arg1 = registerTxnSignerHandle(&__arg1)
+	return
+}
+
+//export FC_util_RemoveSignService
+func FC_util_RemoveSignService(_signerID *C.core__UID) (____error_code uint32) {
+	signerID := *(*core.UID)(unsafe.Pointer(_signerID))
+	____return_err := util.RemoveSignService(signerID)
+	____error_code = libErrorCode(____return_err)
+	if ____return_err == nil {
+	}
+	return
+}
+
+//export FC_util_EnumerateSignServices
+func FC_util_EnumerateSignServices(_arg0 *C.TxnSignerIterator__Handle) (____error_code uint32) {
+	__arg0 := util.EnumerateSignServices()
+	*_arg0 = registerTxnSignerIteratorHandle(&__arg0)
+	return
+}
+
+//export FC_util_SignServicesForTxn
+func FC_util_SignServicesForTxn(_wlt *C.Wallet__Handle, _txn *C.Transaction__Handle, _arg2 *C.TxnSignerIterator__Handle) (____error_code uint32) {
+	__wlt, okwlt := lookupWalletHandle(*_wlt)
+	if !okwlt {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	wlt := *__wlt
+	__txn, oktxn := lookupTransactionHandle(*_txn)
+	if !oktxn {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	txn := *__txn
+	__arg2 := util.SignServicesForTxn(wlt, txn)
+	*_arg2 = registerTxnSignerIteratorHandle(&__arg2)
+	return
+}
+
+//export FC_util_ReadyForTxn
+func FC_util_ReadyForTxn(_signerID *C.core__UID, _wallet *C.Wallet__Handle, _txn *C.Transaction__Handle, _arg3 *bool) (____error_code uint32) {
+	signerID := *(*core.UID)(unsafe.Pointer(_signerID))
+	__wallet, okwallet := lookupWalletHandle(*_wallet)
+	if !okwallet {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	wallet := *__wallet
+	__txn, oktxn := lookupTransactionHandle(*_txn)
+	if !oktxn {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	txn := *__txn
+	__arg3, ____return_err := util.ReadyForTxn(signerID, wallet, txn)
+	____error_code = libErrorCode(____return_err)
+	if ____return_err == nil {
+		*_arg3 = __arg3
+	}
+	return
+}
+
+//export FC_util_SignTransaction
+func FC_util_SignTransaction(_signerID *C.core__UID, _txn *C.Transaction__Handle, _pwd *C.core__PasswordReader, _indices []string, _arg4 *C.Transaction__Handle) (____error_code uint32) {
+	signerID := *(*core.UID)(unsafe.Pointer(_signerID))
+	__txn, oktxn := lookupTransactionHandle(*_txn)
+	if !oktxn {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	txn := *__txn
+	pwd := *(*core.PasswordReader)(unsafe.Pointer(_pwd))
+	indices := *(*[]string)(unsafe.Pointer(&_indices))
+	__arg4, ____return_err := util.SignTransaction(signerID, txn, pwd, indices)
+	____error_code = libErrorCode(____return_err)
+	if ____return_err == nil {
+		*_arg4 = registerTransactionHandle(&__arg4)
+	}
+	return
+}
+
+//export FC_util_GetSignerDescription
+func FC_util_GetSignerDescription(_signerID *C.core__UID, _arg1 *C.GoString_) (____error_code uint32) {
+	signerID := *(*core.UID)(unsafe.Pointer(_signerID))
+	__arg1, ____return_err := util.GetSignerDescription(signerID)
+	____error_code = libErrorCode(____return_err)
+	if ____return_err == nil {
+		copyString(__arg1, _arg1)
+	}
+	return
+}
+
+//export FC_util_LookupSignServiceForWallet
+func FC_util_LookupSignServiceForWallet(_wlt *C.Wallet__Handle, _signerID *C.core__UID, _arg2 *C.TxnSigner__Handle) (____error_code uint32) {
+	__wlt, okwlt := lookupWalletHandle(*_wlt)
+	if !okwlt {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	wlt := *__wlt
+	signerID := *(*core.UID)(unsafe.Pointer(_signerID))
+	__arg2, ____return_err := util.LookupSignServiceForWallet(wlt, signerID)
+	____error_code = libErrorCode(____return_err)
+	if ____return_err == nil {
+		*_arg2 = registerTxnSignerHandle(&__arg2)
+	}
+	return
+}
+
+//export FC_util_GenericMultiWalletSign
+func FC_util_GenericMultiWalletSign(_txn *C.Transaction__Handle, _signSpec []C.core__InputSignDescriptor, _pwd *C.core__PasswordReader, _arg3 *C.Transaction__Handle) (____error_code uint32) {
+	__txn, oktxn := lookupTransactionHandle(*_txn)
+	if !oktxn {
+		____error_code = FC_BAD_HANDLE
+		return
+	}
+	txn := *__txn
+	signSpec := *(*[]core.InputSignDescriptor)(unsafe.Pointer(&_signSpec))
+	pwd := *(*core.PasswordReader)(unsafe.Pointer(_pwd))
+	__arg3, ____return_err := util.GenericMultiWalletSign(txn, signSpec, pwd)
+	____error_code = libErrorCode(____return_err)
+	if ____return_err == nil {
+		*_arg3 = registerTransactionHandle(&__arg3)
+	}
+	return
+}