rpc: add new client, use it everywhere

The new client implementation supports concurrent requests,
subscriptions and replaces the various ad hoc RPC clients
throughout go-ethereum.

1 files changed, 16 insertions, 47 deletions

diff --git a/rpc/errors.go b/rpc/errors.go
index bc352fc45..9cf9dc60c 100644
--- a/rpc/errors.go
+++ b/rpc/errors.go
@@ -24,74 +24,43 @@ type methodNotFoundError struct {
 	method  string
 }
 
-func (e *methodNotFoundError) Code() int {
-	return -32601
-}
+func (e *methodNotFoundError) ErrorCode() 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
-}
+type invalidRequestError struct{ message string }
 
-func (e *invalidRequestError) Code() int {
-	return -32600
-}
+func (e *invalidRequestError) ErrorCode() int { return -32600 }
 
-func (e *invalidRequestError) Error() string {
-	return e.message
-}
+func (e *invalidRequestError) Error() string { return e.message }
 
 // received message is invalid
-type invalidMessageError struct {
-	message string
-}
+type invalidMessageError struct{ message string }
 
-func (e *invalidMessageError) Code() int {
-	return -32700
-}
+func (e *invalidMessageError) ErrorCode() int { return -32700 }
 
-func (e *invalidMessageError) Error() string {
-	return e.message
-}
+func (e *invalidMessageError) Error() string { return e.message }
 
 // unable to decode supplied params, or an invalid number of parameters
-type invalidParamsError struct {
-	message string
-}
+type invalidParamsError struct{ message string }
 
-func (e *invalidParamsError) Code() int {
-	return -32602
-}
+func (e *invalidParamsError) ErrorCode() int { return -32602 }
 
-func (e *invalidParamsError) Error() string {
-	return e.message
-}
+func (e *invalidParamsError) Error() string { return e.message }
 
 // logic error, callback returned an error
-type callbackError struct {
-	message string
-}
+type callbackError struct{ message string }
 
-func (e *callbackError) Code() int {
-	return -32000
-}
+func (e *callbackError) ErrorCode() int { return -32000 }
 
-func (e *callbackError) Error() string {
-	return e.message
-}
+func (e *callbackError) Error() string { return e.message }
 
 // issued when a request is received after the server is issued to stop.
-type shutdownError struct {
-}
+type shutdownError struct{}
 
-func (e *shutdownError) Code() int {
-	return -32000
-}
+func (e *shutdownError) ErrorCode() int { return -32000 }
 
-func (e *shutdownError) Error() string {
-	return "server is shutting down"
-}
+func (e *shutdownError) Error() string { return "server is shutting down" }