les: remove useless protocol defines (#22115)

This PR has two changes in the les protocol:

- the auxRoot is not supported. See ethereum/devp2p#171 for more information
- the empty response will be returned in GetHelperTrieProofsMsg request if the merkle
   proving is failed. note, for backward compatibility, the empty merkle proof as well as
   the request auxiliary data will still be returned in  les2/3 protocol no matter the proving
   is successful or not. the proving failure can happen e.g. request the proving for a
   non-included entry in helper trie (unstable header).
This commit is contained in:
gary rong 2021-01-17 02:06:18 +08:00 committed by GitHub
parent c76573a97b
commit 034ecc3210
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 23 additions and 22 deletions

View File

@ -156,7 +156,7 @@ func (b *benchmarkHelperTrie) request(peer *serverPeer, index int) error {
for i := range reqs {
key := make([]byte, 8)
binary.BigEndian.PutUint64(key[:], uint64(rand.Int63n(int64(b.headNum))))
reqs[i] = HelperTrieReq{Type: htCanonical, TrieIdx: b.sectionCount - 1, Key: key, AuxReq: auxHeader}
reqs[i] = HelperTrieReq{Type: htCanonical, TrieIdx: b.sectionCount - 1, Key: key, AuxReq: htAuxHeader}
}
}

View File

@ -443,7 +443,7 @@ func testGetCHTProofs(t *testing.T, protocol int) {
Type: htCanonical,
TrieIdx: 0,
Key: key,
AuxReq: auxHeader,
AuxReq: htAuxHeader,
}}
// Send the proof request and verify the response
sendRequest(server.peer.app, GetHelperTrieProofsMsg, 42, requestsV2)

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@ -295,10 +295,9 @@ const (
htCanonical = iota // Canonical hash trie
htBloomBits // BloomBits trie
// applicable for all helper trie requests
auxRoot = 1
// applicable for htCanonical
auxHeader = 2
// helper trie auxiliary types
// htAuxNone = 1 ; deprecated number, used in les2/3 previously.
htAuxHeader = 2 // applicable for htCanonical, requests for relevant headers
)
type HelperTrieReq struct {
@ -339,7 +338,7 @@ func (r *ChtRequest) Request(reqID uint64, peer *serverPeer) error {
Type: htCanonical,
TrieIdx: r.ChtNum,
Key: encNum[:],
AuxReq: auxHeader,
AuxReq: htAuxHeader,
}
return peer.requestHelperTrieProofs(reqID, []HelperTrieReq{req})
}

View File

@ -741,22 +741,24 @@ func (h *serverHandler) handleMsg(p *clientPeer, wg *sync.WaitGroup) error {
auxTrie, _ = trie.New(root, trie.NewDatabase(rawdb.NewTable(h.chainDb, prefix)))
}
}
if request.AuxReq == auxRoot {
var data []byte
if root != (common.Hash{}) {
data = root[:]
}
if auxTrie == nil {
sendResponse(req.ReqID, 0, nil, task.servingTime)
return
}
// TODO(rjl493456442) short circuit if the proving is failed.
// The original client side code has a dirty hack to retrieve
// the headers with no valid proof. Keep the compatibility for
// legacy les protocol and drop this hack when the les2/3 are
// not supported.
err := auxTrie.Prove(request.Key, request.FromLevel, nodes)
if p.version >= lpv4 && err != nil {
sendResponse(req.ReqID, 0, nil, task.servingTime)
return
}
if request.AuxReq == htAuxHeader {
data := h.getAuxiliaryHeaders(request)
auxData = append(auxData, data)
auxBytes += len(data)
} else {
if auxTrie != nil {
auxTrie.Prove(request.Key, request.FromLevel, nodes)
}
if request.AuxReq != 0 {
data := h.getAuxiliaryHeaders(request)
auxData = append(auxData, data)
auxBytes += len(data)
}
}
if nodes.DataSize()+auxBytes >= softResponseLimit {
break
@ -904,7 +906,7 @@ func (h *serverHandler) getHelperTrie(typ uint, index uint64) (common.Hash, stri
// getAuxiliaryHeaders returns requested auxiliary headers for the CHT request.
func (h *serverHandler) getAuxiliaryHeaders(req HelperTrieReq) []byte {
if req.Type == htCanonical && req.AuxReq == auxHeader && len(req.Key) == 8 {
if req.Type == htCanonical && req.AuxReq == htAuxHeader && len(req.Key) == 8 {
blockNum := binary.BigEndian.Uint64(req.Key)
hash := rawdb.ReadCanonicalHash(h.chainDb, blockNum)
return rawdb.ReadHeaderRLP(h.chainDb, hash, blockNum)