prysm-pulse/beacon-chain/sync/error.go
Preston Van Loon 129bc763ee
Rate limiter for rpc beacon blocks (#4549)
* use rate limiter for rpc beacon blocks

* gofmt

* don't delete empty buckets

* disconnect bad peers

* tell peer they are being rate limited

* defer disconnect

* fix tests

* set burst to x10

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
2020-01-15 17:19:06 -08:00

49 lines
1.1 KiB
Go

package sync
import (
"bytes"
"errors"
"io"
"github.com/prysmaticlabs/prysm/beacon-chain/p2p/encoder"
)
const genericError = "internal service error"
const rateLimitedError = "rate limited"
var errWrongForkVersion = errors.New("wrong fork version")
var errInvalidEpoch = errors.New("invalid epoch")
var responseCodeSuccess = byte(0x00)
var responseCodeInvalidRequest = byte(0x01)
var responseCodeServerError = byte(0x02)
func (r *Service) generateErrorResponse(code byte, reason string) ([]byte, error) {
buf := bytes.NewBuffer([]byte{code})
if _, err := r.p2p.Encoding().EncodeWithLength(buf, []byte(reason)); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
// ReadStatusCode response from a RPC stream.
func ReadStatusCode(stream io.Reader, encoding encoder.NetworkEncoding) (uint8, string, error) {
b := make([]byte, 1)
_, err := stream.Read(b)
if err != nil {
return 0, "", err
}
if b[0] == responseCodeSuccess {
return 0, "", nil
}
msg := make([]byte, 0)
if err := encoding.DecodeWithLength(stream, &msg); err != nil {
return 0, "", err
}
return b[0], string(msg), nil
}