750 lines
23 KiB
Go
750 lines
23 KiB
Go
// Copyright 2020 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package ethtest
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import (
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"fmt"
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"net"
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"reflect"
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"strings"
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"time"
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"github.com/davecgh/go-spew/spew"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/eth/protocols/eth"
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"github.com/ethereum/go-ethereum/internal/utesting"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/rlpx"
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)
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var (
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pretty = spew.ConfigState{
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Indent: " ",
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DisableCapacities: true,
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DisablePointerAddresses: true,
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SortKeys: true,
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}
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timeout = 20 * time.Second
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)
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// Is_66 checks if the node supports the eth66 protocol version,
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// and if not, exists the test suite
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func (s *Suite) Is_66(t *utesting.T) {
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conn, err := s.dial66()
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if err != nil {
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t.Fatalf("dial failed: %v", err)
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}
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if err := conn.handshake(); err != nil {
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t.Fatalf("handshake failed: %v", err)
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}
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if conn.negotiatedProtoVersion < 66 {
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t.Fail()
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}
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}
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// dial attempts to dial the given node and perform a handshake,
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// returning the created Conn if successful.
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func (s *Suite) dial() (*Conn, error) {
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// dial
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fd, err := net.Dial("tcp", fmt.Sprintf("%v:%d", s.Dest.IP(), s.Dest.TCP()))
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if err != nil {
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return nil, err
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}
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conn := Conn{Conn: rlpx.NewConn(fd, s.Dest.Pubkey())}
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// do encHandshake
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conn.ourKey, _ = crypto.GenerateKey()
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_, err = conn.Handshake(conn.ourKey)
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if err != nil {
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conn.Close()
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return nil, err
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}
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// set default p2p capabilities
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conn.caps = []p2p.Cap{
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{Name: "eth", Version: 64},
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{Name: "eth", Version: 65},
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}
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conn.ourHighestProtoVersion = 65
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return &conn, nil
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}
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// dial66 attempts to dial the given node and perform a handshake,
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// returning the created Conn with additional eth66 capabilities if
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// successful
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func (s *Suite) dial66() (*Conn, error) {
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conn, err := s.dial()
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if err != nil {
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return nil, fmt.Errorf("dial failed: %v", err)
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}
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conn.caps = append(conn.caps, p2p.Cap{Name: "eth", Version: 66})
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conn.ourHighestProtoVersion = 66
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return conn, nil
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}
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// peer performs both the protocol handshake and the status message
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// exchange with the node in order to peer with it.
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func (c *Conn) peer(chain *Chain, status *Status) error {
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if err := c.handshake(); err != nil {
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return fmt.Errorf("handshake failed: %v", err)
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}
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if _, err := c.statusExchange(chain, status); err != nil {
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return fmt.Errorf("status exchange failed: %v", err)
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}
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return nil
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}
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// handshake performs a protocol handshake with the node.
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func (c *Conn) handshake() error {
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defer c.SetDeadline(time.Time{})
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c.SetDeadline(time.Now().Add(10 * time.Second))
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// write hello to client
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pub0 := crypto.FromECDSAPub(&c.ourKey.PublicKey)[1:]
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ourHandshake := &Hello{
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Version: 5,
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Caps: c.caps,
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ID: pub0,
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}
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if err := c.Write(ourHandshake); err != nil {
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return fmt.Errorf("write to connection failed: %v", err)
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}
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// read hello from client
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switch msg := c.Read().(type) {
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case *Hello:
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// set snappy if version is at least 5
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if msg.Version >= 5 {
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c.SetSnappy(true)
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}
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c.negotiateEthProtocol(msg.Caps)
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if c.negotiatedProtoVersion == 0 {
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return fmt.Errorf("unexpected eth protocol version")
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}
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return nil
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default:
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return fmt.Errorf("bad handshake: %#v", msg)
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}
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}
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// negotiateEthProtocol sets the Conn's eth protocol version to highest
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// advertised capability from peer.
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func (c *Conn) negotiateEthProtocol(caps []p2p.Cap) {
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var highestEthVersion uint
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for _, capability := range caps {
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if capability.Name != "eth" {
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continue
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}
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if capability.Version > highestEthVersion && capability.Version <= c.ourHighestProtoVersion {
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highestEthVersion = capability.Version
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}
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}
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c.negotiatedProtoVersion = highestEthVersion
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}
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// statusExchange performs a `Status` message exchange with the given node.
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func (c *Conn) statusExchange(chain *Chain, status *Status) (Message, error) {
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defer c.SetDeadline(time.Time{})
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c.SetDeadline(time.Now().Add(20 * time.Second))
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// read status message from client
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var message Message
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loop:
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for {
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switch msg := c.Read().(type) {
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case *Status:
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if have, want := msg.Head, chain.blocks[chain.Len()-1].Hash(); have != want {
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return nil, fmt.Errorf("wrong head block in status, want: %#x (block %d) have %#x",
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want, chain.blocks[chain.Len()-1].NumberU64(), have)
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}
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if have, want := msg.TD.Cmp(chain.TD()), 0; have != want {
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return nil, fmt.Errorf("wrong TD in status: have %v want %v", have, want)
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}
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if have, want := msg.ForkID, chain.ForkID(); !reflect.DeepEqual(have, want) {
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return nil, fmt.Errorf("wrong fork ID in status: have %v, want %v", have, want)
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}
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if have, want := msg.ProtocolVersion, c.ourHighestProtoVersion; have != uint32(want) {
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return nil, fmt.Errorf("wrong protocol version: have %v, want %v", have, want)
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}
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message = msg
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break loop
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case *Disconnect:
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return nil, fmt.Errorf("disconnect received: %v", msg.Reason)
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case *Ping:
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c.Write(&Pong{}) // TODO (renaynay): in the future, this should be an error
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// (PINGs should not be a response upon fresh connection)
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default:
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return nil, fmt.Errorf("bad status message: %s", pretty.Sdump(msg))
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}
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}
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// make sure eth protocol version is set for negotiation
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if c.negotiatedProtoVersion == 0 {
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return nil, fmt.Errorf("eth protocol version must be set in Conn")
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}
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if status == nil {
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// default status message
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status = &Status{
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ProtocolVersion: uint32(c.negotiatedProtoVersion),
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NetworkID: chain.chainConfig.ChainID.Uint64(),
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TD: chain.TD(),
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Head: chain.blocks[chain.Len()-1].Hash(),
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Genesis: chain.blocks[0].Hash(),
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ForkID: chain.ForkID(),
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}
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}
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if err := c.Write(status); err != nil {
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return nil, fmt.Errorf("write to connection failed: %v", err)
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}
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return message, nil
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}
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// createSendAndRecvConns creates two connections, one for sending messages to the
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// node, and one for receiving messages from the node.
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func (s *Suite) createSendAndRecvConns(isEth66 bool) (*Conn, *Conn, error) {
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var (
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sendConn *Conn
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recvConn *Conn
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err error
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)
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if isEth66 {
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sendConn, err = s.dial66()
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if err != nil {
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return nil, nil, fmt.Errorf("dial failed: %v", err)
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}
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recvConn, err = s.dial66()
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if err != nil {
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sendConn.Close()
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return nil, nil, fmt.Errorf("dial failed: %v", err)
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}
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} else {
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sendConn, err = s.dial()
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if err != nil {
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return nil, nil, fmt.Errorf("dial failed: %v", err)
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}
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recvConn, err = s.dial()
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if err != nil {
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sendConn.Close()
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return nil, nil, fmt.Errorf("dial failed: %v", err)
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}
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}
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return sendConn, recvConn, nil
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}
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// readAndServe serves GetBlockHeaders requests while waiting
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// on another message from the node.
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func (c *Conn) readAndServe(chain *Chain, timeout time.Duration) Message {
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start := time.Now()
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for time.Since(start) < timeout {
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c.SetReadDeadline(time.Now().Add(5 * time.Second))
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switch msg := c.Read().(type) {
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case *Ping:
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c.Write(&Pong{})
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case *GetBlockHeaders:
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req := *msg
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headers, err := chain.GetHeaders(req)
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if err != nil {
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return errorf("could not get headers for inbound header request: %v", err)
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}
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if err := c.Write(headers); err != nil {
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return errorf("could not write to connection: %v", err)
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}
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default:
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return msg
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}
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}
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return errorf("no message received within %v", timeout)
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}
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// readAndServe66 serves eth66 GetBlockHeaders requests while waiting
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// on another message from the node.
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func (c *Conn) readAndServe66(chain *Chain, timeout time.Duration) (uint64, Message) {
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start := time.Now()
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for time.Since(start) < timeout {
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c.SetReadDeadline(time.Now().Add(10 * time.Second))
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reqID, msg := c.Read66()
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switch msg := msg.(type) {
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case *Ping:
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c.Write(&Pong{})
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case *GetBlockHeaders:
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headers, err := chain.GetHeaders(*msg)
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if err != nil {
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return 0, errorf("could not get headers for inbound header request: %v", err)
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}
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resp := ð.BlockHeadersPacket66{
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RequestId: reqID,
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BlockHeadersPacket: eth.BlockHeadersPacket(headers),
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}
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if err := c.Write66(resp, BlockHeaders{}.Code()); err != nil {
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return 0, errorf("could not write to connection: %v", err)
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}
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default:
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return reqID, msg
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}
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}
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return 0, errorf("no message received within %v", timeout)
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}
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// headersRequest executes the given `GetBlockHeaders` request.
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func (c *Conn) headersRequest(request *GetBlockHeaders, chain *Chain, isEth66 bool, reqID uint64) (BlockHeaders, error) {
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defer c.SetReadDeadline(time.Time{})
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c.SetReadDeadline(time.Now().Add(20 * time.Second))
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// if on eth66 connection, perform eth66 GetBlockHeaders request
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if isEth66 {
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return getBlockHeaders66(chain, c, request, reqID)
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}
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if err := c.Write(request); err != nil {
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return nil, err
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}
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switch msg := c.readAndServe(chain, timeout).(type) {
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case *BlockHeaders:
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return *msg, nil
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default:
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return nil, fmt.Errorf("invalid message: %s", pretty.Sdump(msg))
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}
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}
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// getBlockHeaders66 executes the given `GetBlockHeaders` request over the eth66 protocol.
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func getBlockHeaders66(chain *Chain, conn *Conn, request *GetBlockHeaders, id uint64) (BlockHeaders, error) {
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// write request
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packet := eth.GetBlockHeadersPacket(*request)
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req := ð.GetBlockHeadersPacket66{
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RequestId: id,
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GetBlockHeadersPacket: &packet,
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}
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if err := conn.Write66(req, GetBlockHeaders{}.Code()); err != nil {
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return nil, fmt.Errorf("could not write to connection: %v", err)
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}
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// wait for response
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msg := conn.waitForResponse(chain, timeout, req.RequestId)
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headers, ok := msg.(BlockHeaders)
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if !ok {
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return nil, fmt.Errorf("unexpected message received: %s", pretty.Sdump(msg))
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}
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return headers, nil
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}
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// headersMatch returns whether the received headers match the given request
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func headersMatch(expected BlockHeaders, headers BlockHeaders) bool {
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return reflect.DeepEqual(expected, headers)
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}
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// waitForResponse reads from the connection until a response with the expected
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// request ID is received.
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func (c *Conn) waitForResponse(chain *Chain, timeout time.Duration, requestID uint64) Message {
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for {
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id, msg := c.readAndServe66(chain, timeout)
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if id == requestID {
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return msg
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}
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}
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}
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// sendNextBlock broadcasts the next block in the chain and waits
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// for the node to propagate the block and import it into its chain.
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func (s *Suite) sendNextBlock(isEth66 bool) error {
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// set up sending and receiving connections
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sendConn, recvConn, err := s.createSendAndRecvConns(isEth66)
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if err != nil {
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return err
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}
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defer sendConn.Close()
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defer recvConn.Close()
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if err = sendConn.peer(s.chain, nil); err != nil {
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return fmt.Errorf("peering failed: %v", err)
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}
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if err = recvConn.peer(s.chain, nil); err != nil {
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return fmt.Errorf("peering failed: %v", err)
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}
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// create new block announcement
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nextBlock := s.fullChain.blocks[s.chain.Len()]
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blockAnnouncement := &NewBlock{
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Block: nextBlock,
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TD: s.fullChain.TotalDifficultyAt(s.chain.Len()),
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}
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// send announcement and wait for node to request the header
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if err = s.testAnnounce(sendConn, recvConn, blockAnnouncement); err != nil {
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return fmt.Errorf("failed to announce block: %v", err)
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}
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// wait for client to update its chain
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if err = s.waitForBlockImport(recvConn, nextBlock, isEth66); err != nil {
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return fmt.Errorf("failed to receive confirmation of block import: %v", err)
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}
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// update test suite chain
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s.chain.blocks = append(s.chain.blocks, nextBlock)
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return nil
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}
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// testAnnounce writes a block announcement to the node and waits for the node
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// to propagate it.
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func (s *Suite) testAnnounce(sendConn, receiveConn *Conn, blockAnnouncement *NewBlock) error {
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if err := sendConn.Write(blockAnnouncement); err != nil {
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return fmt.Errorf("could not write to connection: %v", err)
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}
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return s.waitAnnounce(receiveConn, blockAnnouncement)
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}
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// waitAnnounce waits for a NewBlock or NewBlockHashes announcement from the node.
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func (s *Suite) waitAnnounce(conn *Conn, blockAnnouncement *NewBlock) error {
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for {
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switch msg := conn.readAndServe(s.chain, timeout).(type) {
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case *NewBlock:
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if !reflect.DeepEqual(blockAnnouncement.Block.Header(), msg.Block.Header()) {
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return fmt.Errorf("wrong header in block announcement: \nexpected %v "+
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"\ngot %v", blockAnnouncement.Block.Header(), msg.Block.Header())
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}
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if !reflect.DeepEqual(blockAnnouncement.TD, msg.TD) {
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return fmt.Errorf("wrong TD in announcement: expected %v, got %v", blockAnnouncement.TD, msg.TD)
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}
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return nil
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case *NewBlockHashes:
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hashes := *msg
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if blockAnnouncement.Block.Hash() != hashes[0].Hash {
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return fmt.Errorf("wrong block hash in announcement: expected %v, got %v", blockAnnouncement.Block.Hash(), hashes[0].Hash)
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}
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return nil
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case *NewPooledTransactionHashes:
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// ignore tx announcements from previous tests
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continue
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default:
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return fmt.Errorf("unexpected: %s", pretty.Sdump(msg))
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}
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}
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}
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func (s *Suite) waitForBlockImport(conn *Conn, block *types.Block, isEth66 bool) error {
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defer conn.SetReadDeadline(time.Time{})
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conn.SetReadDeadline(time.Now().Add(20 * time.Second))
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// create request
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req := &GetBlockHeaders{
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Origin: eth.HashOrNumber{
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Hash: block.Hash(),
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},
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Amount: 1,
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}
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// loop until BlockHeaders response contains desired block, confirming the
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// node imported the block
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for {
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var (
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headers BlockHeaders
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err error
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)
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if isEth66 {
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requestID := uint64(54)
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headers, err = conn.headersRequest(req, s.chain, eth66, requestID)
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} else {
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headers, err = conn.headersRequest(req, s.chain, eth65, 0)
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}
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if err != nil {
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return fmt.Errorf("GetBlockHeader request failed: %v", err)
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}
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// if headers response is empty, node hasn't imported block yet, try again
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if len(headers) == 0 {
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time.Sleep(100 * time.Millisecond)
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continue
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}
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if !reflect.DeepEqual(block.Header(), headers[0]) {
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return fmt.Errorf("wrong header returned: wanted %v, got %v", block.Header(), headers[0])
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}
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return nil
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}
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}
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func (s *Suite) oldAnnounce(isEth66 bool) error {
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sendConn, receiveConn, err := s.createSendAndRecvConns(isEth66)
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if err != nil {
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return err
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}
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defer sendConn.Close()
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defer receiveConn.Close()
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if err := sendConn.peer(s.chain, nil); err != nil {
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return fmt.Errorf("peering failed: %v", err)
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}
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if err := receiveConn.peer(s.chain, nil); err != nil {
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return fmt.Errorf("peering failed: %v", err)
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}
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// create old block announcement
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oldBlockAnnounce := &NewBlock{
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Block: s.chain.blocks[len(s.chain.blocks)/2],
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TD: s.chain.blocks[len(s.chain.blocks)/2].Difficulty(),
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}
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if err := sendConn.Write(oldBlockAnnounce); err != nil {
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return fmt.Errorf("could not write to connection: %v", err)
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}
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// wait to see if the announcement is propagated
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switch msg := receiveConn.readAndServe(s.chain, time.Second*8).(type) {
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case *NewBlock:
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block := *msg
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if block.Block.Hash() == oldBlockAnnounce.Block.Hash() {
|
|
return fmt.Errorf("unexpected: block propagated: %s", pretty.Sdump(msg))
|
|
}
|
|
case *NewBlockHashes:
|
|
hashes := *msg
|
|
for _, hash := range hashes {
|
|
if hash.Hash == oldBlockAnnounce.Block.Hash() {
|
|
return fmt.Errorf("unexpected: block announced: %s", pretty.Sdump(msg))
|
|
}
|
|
}
|
|
case *Error:
|
|
errMsg := *msg
|
|
// check to make sure error is timeout (propagation didn't come through == test successful)
|
|
if !strings.Contains(errMsg.String(), "timeout") {
|
|
return fmt.Errorf("unexpected error: %v", pretty.Sdump(msg))
|
|
}
|
|
default:
|
|
return fmt.Errorf("unexpected: %s", pretty.Sdump(msg))
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *Suite) maliciousHandshakes(t *utesting.T, isEth66 bool) error {
|
|
var (
|
|
conn *Conn
|
|
err error
|
|
)
|
|
if isEth66 {
|
|
conn, err = s.dial66()
|
|
if err != nil {
|
|
return fmt.Errorf("dial failed: %v", err)
|
|
}
|
|
} else {
|
|
conn, err = s.dial()
|
|
if err != nil {
|
|
return fmt.Errorf("dial failed: %v", err)
|
|
}
|
|
}
|
|
defer conn.Close()
|
|
// write hello to client
|
|
pub0 := crypto.FromECDSAPub(&conn.ourKey.PublicKey)[1:]
|
|
handshakes := []*Hello{
|
|
{
|
|
Version: 5,
|
|
Caps: []p2p.Cap{
|
|
{Name: largeString(2), Version: 64},
|
|
},
|
|
ID: pub0,
|
|
},
|
|
{
|
|
Version: 5,
|
|
Caps: []p2p.Cap{
|
|
{Name: "eth", Version: 64},
|
|
{Name: "eth", Version: 65},
|
|
},
|
|
ID: append(pub0, byte(0)),
|
|
},
|
|
{
|
|
Version: 5,
|
|
Caps: []p2p.Cap{
|
|
{Name: "eth", Version: 64},
|
|
{Name: "eth", Version: 65},
|
|
},
|
|
ID: append(pub0, pub0...),
|
|
},
|
|
{
|
|
Version: 5,
|
|
Caps: []p2p.Cap{
|
|
{Name: "eth", Version: 64},
|
|
{Name: "eth", Version: 65},
|
|
},
|
|
ID: largeBuffer(2),
|
|
},
|
|
{
|
|
Version: 5,
|
|
Caps: []p2p.Cap{
|
|
{Name: largeString(2), Version: 64},
|
|
},
|
|
ID: largeBuffer(2),
|
|
},
|
|
}
|
|
for i, handshake := range handshakes {
|
|
t.Logf("Testing malicious handshake %v\n", i)
|
|
if err := conn.Write(handshake); err != nil {
|
|
return fmt.Errorf("could not write to connection: %v", err)
|
|
}
|
|
// check that the peer disconnected
|
|
for i := 0; i < 2; i++ {
|
|
switch msg := conn.readAndServe(s.chain, 20*time.Second).(type) {
|
|
case *Disconnect:
|
|
case *Error:
|
|
case *Hello:
|
|
// Discard one hello as Hello's are sent concurrently
|
|
continue
|
|
default:
|
|
return fmt.Errorf("unexpected: %s", pretty.Sdump(msg))
|
|
}
|
|
}
|
|
// dial for the next round
|
|
if isEth66 {
|
|
conn, err = s.dial66()
|
|
if err != nil {
|
|
return fmt.Errorf("dial failed: %v", err)
|
|
}
|
|
} else {
|
|
conn, err = s.dial()
|
|
if err != nil {
|
|
return fmt.Errorf("dial failed: %v", err)
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *Suite) maliciousStatus(conn *Conn) error {
|
|
if err := conn.handshake(); err != nil {
|
|
return fmt.Errorf("handshake failed: %v", err)
|
|
}
|
|
status := &Status{
|
|
ProtocolVersion: uint32(conn.negotiatedProtoVersion),
|
|
NetworkID: s.chain.chainConfig.ChainID.Uint64(),
|
|
TD: largeNumber(2),
|
|
Head: s.chain.blocks[s.chain.Len()-1].Hash(),
|
|
Genesis: s.chain.blocks[0].Hash(),
|
|
ForkID: s.chain.ForkID(),
|
|
}
|
|
// get status
|
|
msg, err := conn.statusExchange(s.chain, status)
|
|
if err != nil {
|
|
return fmt.Errorf("status exchange failed: %v", err)
|
|
}
|
|
switch msg := msg.(type) {
|
|
case *Status:
|
|
default:
|
|
return fmt.Errorf("expected status, got: %#v ", msg)
|
|
}
|
|
// wait for disconnect
|
|
switch msg := conn.readAndServe(s.chain, timeout).(type) {
|
|
case *Disconnect:
|
|
return nil
|
|
case *Error:
|
|
return nil
|
|
default:
|
|
return fmt.Errorf("expected disconnect, got: %s", pretty.Sdump(msg))
|
|
}
|
|
}
|
|
|
|
func (s *Suite) hashAnnounce(isEth66 bool) error {
|
|
// create connections
|
|
sendConn, recvConn, err := s.createSendAndRecvConns(isEth66)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to create connections: %v", err)
|
|
}
|
|
defer sendConn.Close()
|
|
defer recvConn.Close()
|
|
if err := sendConn.peer(s.chain, nil); err != nil {
|
|
return fmt.Errorf("peering failed: %v", err)
|
|
}
|
|
if err := recvConn.peer(s.chain, nil); err != nil {
|
|
return fmt.Errorf("peering failed: %v", err)
|
|
}
|
|
// create NewBlockHashes announcement
|
|
type anno struct {
|
|
Hash common.Hash // Hash of one particular block being announced
|
|
Number uint64 // Number of one particular block being announced
|
|
}
|
|
nextBlock := s.fullChain.blocks[s.chain.Len()]
|
|
announcement := anno{Hash: nextBlock.Hash(), Number: nextBlock.Number().Uint64()}
|
|
newBlockHash := &NewBlockHashes{announcement}
|
|
if err := sendConn.Write(newBlockHash); err != nil {
|
|
return fmt.Errorf("failed to write to connection: %v", err)
|
|
}
|
|
// Announcement sent, now wait for a header request
|
|
var (
|
|
id uint64
|
|
msg Message
|
|
blockHeaderReq GetBlockHeaders
|
|
)
|
|
if isEth66 {
|
|
id, msg = sendConn.Read66()
|
|
switch msg := msg.(type) {
|
|
case GetBlockHeaders:
|
|
blockHeaderReq = msg
|
|
default:
|
|
return fmt.Errorf("unexpected %s", pretty.Sdump(msg))
|
|
}
|
|
if blockHeaderReq.Amount != 1 {
|
|
return fmt.Errorf("unexpected number of block headers requested: %v", blockHeaderReq.Amount)
|
|
}
|
|
if blockHeaderReq.Origin.Hash != announcement.Hash {
|
|
return fmt.Errorf("unexpected block header requested. Announced:\n %v\n Remote request:\n%v",
|
|
pretty.Sdump(announcement),
|
|
pretty.Sdump(blockHeaderReq))
|
|
}
|
|
if err := sendConn.Write66(ð.BlockHeadersPacket66{
|
|
RequestId: id,
|
|
BlockHeadersPacket: eth.BlockHeadersPacket{
|
|
nextBlock.Header(),
|
|
},
|
|
}, BlockHeaders{}.Code()); err != nil {
|
|
return fmt.Errorf("failed to write to connection: %v", err)
|
|
}
|
|
} else {
|
|
msg = sendConn.Read()
|
|
switch msg := msg.(type) {
|
|
case *GetBlockHeaders:
|
|
blockHeaderReq = *msg
|
|
default:
|
|
return fmt.Errorf("unexpected %s", pretty.Sdump(msg))
|
|
}
|
|
if blockHeaderReq.Amount != 1 {
|
|
return fmt.Errorf("unexpected number of block headers requested: %v", blockHeaderReq.Amount)
|
|
}
|
|
if blockHeaderReq.Origin.Hash != announcement.Hash {
|
|
return fmt.Errorf("unexpected block header requested. Announced:\n %v\n Remote request:\n%v",
|
|
pretty.Sdump(announcement),
|
|
pretty.Sdump(blockHeaderReq))
|
|
}
|
|
if err := sendConn.Write(&BlockHeaders{nextBlock.Header()}); err != nil {
|
|
return fmt.Errorf("failed to write to connection: %v", err)
|
|
}
|
|
}
|
|
// wait for block announcement
|
|
msg = recvConn.readAndServe(s.chain, timeout)
|
|
switch msg := msg.(type) {
|
|
case *NewBlockHashes:
|
|
hashes := *msg
|
|
if len(hashes) != 1 {
|
|
return fmt.Errorf("unexpected new block hash announcement: wanted 1 announcement, got %d", len(hashes))
|
|
}
|
|
if nextBlock.Hash() != hashes[0].Hash {
|
|
return fmt.Errorf("unexpected block hash announcement, wanted %v, got %v", nextBlock.Hash(),
|
|
hashes[0].Hash)
|
|
}
|
|
case *NewBlock:
|
|
// node should only propagate NewBlock without having requested the body if the body is empty
|
|
nextBlockBody := nextBlock.Body()
|
|
if len(nextBlockBody.Transactions) != 0 || len(nextBlockBody.Uncles) != 0 {
|
|
return fmt.Errorf("unexpected non-empty new block propagated: %s", pretty.Sdump(msg))
|
|
}
|
|
if msg.Block.Hash() != nextBlock.Hash() {
|
|
return fmt.Errorf("mismatched hash of propagated new block: wanted %v, got %v",
|
|
nextBlock.Hash(), msg.Block.Hash())
|
|
}
|
|
// check to make sure header matches header that was sent to the node
|
|
if !reflect.DeepEqual(nextBlock.Header(), msg.Block.Header()) {
|
|
return fmt.Errorf("incorrect header received: wanted %v, got %v", nextBlock.Header(), msg.Block.Header())
|
|
}
|
|
default:
|
|
return fmt.Errorf("unexpected: %s", pretty.Sdump(msg))
|
|
}
|
|
// confirm node imported block
|
|
if err := s.waitForBlockImport(recvConn, nextBlock, isEth66); err != nil {
|
|
return fmt.Errorf("error waiting for node to import new block: %v", err)
|
|
}
|
|
// update the chain
|
|
s.chain.blocks = append(s.chain.blocks, nextBlock)
|
|
return nil
|
|
}
|