rpc: migrated the RPC insterface to a new reflection based RPC layer

rpc/errors.go

@@ -0,0 +1,97 @@
+// Copyright 2015 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package rpc
+
+import "fmt"
+
+// request is for an unknown service
+type methodNotFoundError struct {
+	service string
+	method  string
+}
+
+func (e *methodNotFoundError) Code() int {
+	return -32601
+}
+
+func (e *methodNotFoundError) Error() string {
+	return fmt.Sprintf("The method %s%s%s does not exist/is not available", e.service, serviceMethodSeparator, e.method)
+}
+
+// received message isn't a valid request
+type invalidRequestError struct {
+	message string
+}
+
+func (e *invalidRequestError) Code() int {
+	return -32600
+}
+
+func (e *invalidRequestError) Error() string {
+	return e.message
+}
+
+// received message is invalid
+type invalidMessageError struct {
+	message string
+}
+
+func (e *invalidMessageError) Code() int {
+	return -32700
+}
+
+func (e *invalidMessageError) Error() string {
+	return e.message
+}
+
+// unable to decode supplied params, or an invalid number of parameters
+type invalidParamsError struct {
+	message string
+}
+
+func (e *invalidParamsError) Code() int {
+	return -32602
+}
+
+func (e *invalidParamsError) Error() string {
+	return e.message
+}
+
+// logic error, callback returned an error
+type callbackError struct {
+	message string
+}
+
+func (e *callbackError) Code() int {
+	return -32000
+}
+
+func (e *callbackError) Error() string {
+	return e.message
+}
+
+// issued when a request is received after the server is issued to stop.
+type shutdownError struct {
+}
+
+func (e *shutdownError) Code() int {
+	return -32000
+}
+
+func (e *shutdownError) Error() string {
+	return "server is shutting down"
+}