254 lines
9.2 KiB
Go
254 lines
9.2 KiB
Go
|
// 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 light implements on-demand retrieval capable state and chain objects
|
||
|
|
// for the Ethereum Light Client.
|
||
|
|
package les
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
|
||
|
|
"github.com/ethereum/go-ethereum/common"
|
||
|
|
"github.com/ethereum/go-ethereum/core"
|
||
|
|
"github.com/ethereum/go-ethereum/core/types"
|
||
|
|
"github.com/ethereum/go-ethereum/crypto"
|
||
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
||
|
|
"github.com/ethereum/go-ethereum/light"
|
||
|
|
"github.com/ethereum/go-ethereum/logger"
|
||
|
|
"github.com/ethereum/go-ethereum/logger/glog"
|
||
|
|
"github.com/ethereum/go-ethereum/rlp"
|
||
|
|
"github.com/ethereum/go-ethereum/trie"
|
||
|
|
)
|
||
|
|
|
||
|
|
type LesOdrRequest interface {
|
||
|
|
GetCost(*peer) uint64
|
||
|
|
Request(uint64, *peer) error
|
||
|
|
Valid(ethdb.Database, *Msg) bool // if true, keeps the retrieved object
|
||
|
|
}
|
||
|
|
|
||
|
|
func LesRequest(req light.OdrRequest) LesOdrRequest {
|
||
|
|
switch r := req.(type) {
|
||
|
|
case *light.BlockRequest:
|
||
|
|
return (*BlockRequest)(r)
|
||
|
|
case *light.ReceiptsRequest:
|
||
|
|
return (*ReceiptsRequest)(r)
|
||
|
|
case *light.TrieRequest:
|
||
|
|
return (*TrieRequest)(r)
|
||
|
|
case *light.CodeRequest:
|
||
|
|
return (*CodeRequest)(r)
|
||
|
|
default:
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// BlockRequest is the ODR request type for block bodies
|
||
|
|
type BlockRequest light.BlockRequest
|
||
|
|
|
||
|
|
// GetCost returns the cost of the given ODR request according to the serving
|
||
|
|
// peer's cost table (implementation of LesOdrRequest)
|
||
|
|
func (self *BlockRequest) GetCost(peer *peer) uint64 {
|
||
|
|
return peer.GetRequestCost(GetBlockBodiesMsg, 1)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Request sends an ODR request to the LES network (implementation of LesOdrRequest)
|
||
|
|
func (self *BlockRequest) Request(reqID uint64, peer *peer) error {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: requesting body of block %08x from peer %v", self.Hash[:4], peer.id)
|
||
|
|
return peer.RequestBodies(reqID, self.GetCost(peer), []common.Hash{self.Hash})
|
||
|
|
}
|
||
|
|
|
||
|
|
// Valid processes an ODR request reply message from the LES network
|
||
|
|
// returns true and stores results in memory if the message was a valid reply
|
||
|
|
// to the request (implementation of LesOdrRequest)
|
||
|
|
func (self *BlockRequest) Valid(db ethdb.Database, msg *Msg) bool {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: validating body of block %08x", self.Hash[:4])
|
||
|
|
if msg.MsgType != MsgBlockBodies {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: invalid message type")
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
bodies := msg.Obj.([]*types.Body)
|
||
|
|
if len(bodies) != 1 {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: invalid number of entries: %d", len(bodies))
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
body := bodies[0]
|
||
|
|
header := core.GetHeader(db, self.Hash)
|
||
|
|
if header == nil {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: header not found for block %08x", self.Hash[:4])
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
txHash := types.DeriveSha(types.Transactions(body.Transactions))
|
||
|
|
if header.TxHash != txHash {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: header.TxHash %08x does not match received txHash %08x", header.TxHash[:4], txHash[:4])
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
uncleHash := types.CalcUncleHash(body.Uncles)
|
||
|
|
if header.UncleHash != uncleHash {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: header.UncleHash %08x does not match received uncleHash %08x", header.UncleHash[:4], uncleHash[:4])
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
data, err := rlp.EncodeToBytes(body)
|
||
|
|
if err != nil {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: body RLP encode error: %v", err)
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
self.Rlp = data
|
||
|
|
glog.V(logger.Debug).Infof("ODR: validation successful")
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
// ReceiptsRequest is the ODR request type for block receipts by block hash
|
||
|
|
type ReceiptsRequest light.ReceiptsRequest
|
||
|
|
|
||
|
|
// GetCost returns the cost of the given ODR request according to the serving
|
||
|
|
// peer's cost table (implementation of LesOdrRequest)
|
||
|
|
func (self *ReceiptsRequest) GetCost(peer *peer) uint64 {
|
||
|
|
return peer.GetRequestCost(GetReceiptsMsg, 1)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Request sends an ODR request to the LES network (implementation of LesOdrRequest)
|
||
|
|
func (self *ReceiptsRequest) Request(reqID uint64, peer *peer) error {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: requesting receipts for block %08x from peer %v", self.Hash[:4], peer.id)
|
||
|
|
return peer.RequestReceipts(reqID, self.GetCost(peer), []common.Hash{self.Hash})
|
||
|
|
}
|
||
|
|
|
||
|
|
// Valid processes an ODR request reply message from the LES network
|
||
|
|
// returns true and stores results in memory if the message was a valid reply
|
||
|
|
// to the request (implementation of LesOdrRequest)
|
||
|
|
func (self *ReceiptsRequest) Valid(db ethdb.Database, msg *Msg) bool {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: validating receipts for block %08x", self.Hash[:4])
|
||
|
|
if msg.MsgType != MsgReceipts {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: invalid message type")
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
receipts := msg.Obj.([]types.Receipts)
|
||
|
|
if len(receipts) != 1 {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: invalid number of entries: %d", len(receipts))
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
hash := types.DeriveSha(receipts[0])
|
||
|
|
header := core.GetHeader(db, self.Hash)
|
||
|
|
if header == nil {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: header not found for block %08x", self.Hash[:4])
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
if !bytes.Equal(header.ReceiptHash[:], hash[:]) {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: header receipts hash %08x does not match calculated RLP hash %08x", header.ReceiptHash[:4], hash[:4])
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
self.Receipts = receipts[0]
|
||
|
|
glog.V(logger.Debug).Infof("ODR: validation successful")
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
type ProofReq struct {
|
||
|
|
BHash common.Hash
|
||
|
|
AccKey, Key []byte
|
||
|
|
}
|
||
|
|
|
||
|
|
// ODR request type for state/storage trie entries, see LesOdrRequest interface
|
||
|
|
type TrieRequest light.TrieRequest
|
||
|
|
|
||
|
|
// GetCost returns the cost of the given ODR request according to the serving
|
||
|
|
// peer's cost table (implementation of LesOdrRequest)
|
||
|
|
func (self *TrieRequest) GetCost(peer *peer) uint64 {
|
||
|
|
return peer.GetRequestCost(GetProofsMsg, 1)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Request sends an ODR request to the LES network (implementation of LesOdrRequest)
|
||
|
|
func (self *TrieRequest) Request(reqID uint64, peer *peer) error {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: requesting trie root %08x key %08x from peer %v", self.Id.Root[:4], self.Key[:4], peer.id)
|
||
|
|
req := &ProofReq{
|
||
|
|
BHash: self.Id.BlockHash,
|
||
|
|
AccKey: self.Id.AccKey,
|
||
|
|
Key: self.Key,
|
||
|
|
}
|
||
|
|
return peer.RequestProofs(reqID, self.GetCost(peer), []*ProofReq{req})
|
||
|
|
}
|
||
|
|
|
||
|
|
// Valid processes an ODR request reply message from the LES network
|
||
|
|
// returns true and stores results in memory if the message was a valid reply
|
||
|
|
// to the request (implementation of LesOdrRequest)
|
||
|
|
func (self *TrieRequest) Valid(db ethdb.Database, msg *Msg) bool {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: validating trie root %08x key %08x", self.Id.Root[:4], self.Key[:4])
|
||
|
|
|
||
|
|
if msg.MsgType != MsgProofs {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: invalid message type")
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
proofs := msg.Obj.([][]rlp.RawValue)
|
||
|
|
if len(proofs) != 1 {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: invalid number of entries: %d", len(proofs))
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
_, err := trie.VerifyProof(self.Id.Root, self.Key, proofs[0])
|
||
|
|
if err != nil {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: merkle proof verification error: %v", err)
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
self.Proof = proofs[0]
|
||
|
|
glog.V(logger.Debug).Infof("ODR: validation successful")
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
type CodeReq struct {
|
||
|
|
BHash common.Hash
|
||
|
|
AccKey []byte
|
||
|
|
}
|
||
|
|
|
||
|
|
// ODR request type for node data (used for retrieving contract code), see LesOdrRequest interface
|
||
|
|
type CodeRequest light.CodeRequest
|
||
|
|
|
||
|
|
// GetCost returns the cost of the given ODR request according to the serving
|
||
|
|
// peer's cost table (implementation of LesOdrRequest)
|
||
|
|
func (self *CodeRequest) GetCost(peer *peer) uint64 {
|
||
|
|
return peer.GetRequestCost(GetCodeMsg, 1)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Request sends an ODR request to the LES network (implementation of LesOdrRequest)
|
||
|
|
func (self *CodeRequest) Request(reqID uint64, peer *peer) error {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: requesting node data for hash %08x from peer %v", self.Hash[:4], peer.id)
|
||
|
|
req := &CodeReq{
|
||
|
|
BHash: self.Id.BlockHash,
|
||
|
|
AccKey: self.Id.AccKey,
|
||
|
|
}
|
||
|
|
return peer.RequestCode(reqID, self.GetCost(peer), []*CodeReq{req})
|
||
|
|
}
|
||
|
|
|
||
|
|
// Valid processes an ODR request reply message from the LES network
|
||
|
|
// returns true and stores results in memory if the message was a valid reply
|
||
|
|
// to the request (implementation of LesOdrRequest)
|
||
|
|
func (self *CodeRequest) Valid(db ethdb.Database, msg *Msg) bool {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: validating node data for hash %08x", self.Hash[:4])
|
||
|
|
if msg.MsgType != MsgCode {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: invalid message type")
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
reply := msg.Obj.([][]byte)
|
||
|
|
if len(reply) != 1 {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: invalid number of entries: %d", len(reply))
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
data := reply[0]
|
||
|
|
hash := crypto.Sha3Hash(data)
|
||
|
|
if !bytes.Equal(self.Hash[:], hash[:]) {
|
||
|
|
glog.V(logger.Debug).Infof("ODR: requested hash %08x does not match received data hash %08x", self.Hash[:4], hash[:4])
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
self.Data = data
|
||
|
|
glog.V(logger.Debug).Infof("ODR: validation successful")
|
||
|
|
return true
|
||
|
|
}
|