diff --git a/les/backend.go b/les/backend.go
index 944e7695d21..a50fe0ced5b 100644
--- a/les/backend.go
+++ b/les/backend.go
@@ -119,7 +119,7 @@ func New(ctx *node.ServiceContext, config *eth.Config) (*LightEthereum, error) {
 	leth.retriever = newRetrieveManager(peers, leth.reqDist, leth.serverPool)
 
 	leth.odr = NewLesOdr(chainDb, light.DefaultClientIndexerConfig, leth.retriever)
-	leth.chtIndexer = light.NewChtIndexer(chainDb, leth.odr, params.CHTFrequencyClient, params.HelperTrieConfirmations)
+	leth.chtIndexer = light.NewChtIndexer(chainDb, leth.odr, params.CHTFrequency, params.HelperTrieConfirmations)
 	leth.bloomTrieIndexer = light.NewBloomTrieIndexer(chainDb, leth.odr, params.BloomBitsBlocksClient, params.BloomTrieFrequency)
 	leth.odr.SetIndexers(leth.chtIndexer, leth.bloomTrieIndexer, leth.bloomIndexer)
 
@@ -179,8 +179,6 @@ func New(ctx *node.ServiceContext, config *eth.Config) (*LightEthereum, error) {
 func lesTopic(genesisHash common.Hash, protocolVersion uint) discv5.Topic {
 	var name string
 	switch protocolVersion {
-	case lpv1:
-		name = "LES"
 	case lpv2:
 		name = "LES2"
 	default:
diff --git a/les/benchmark.go b/les/benchmark.go
index cb302c6ea5c..925d1d89e8d 100644
--- a/les/benchmark.go
+++ b/les/benchmark.go
@@ -135,8 +135,7 @@ func (b *benchmarkHelperTrie) init(pm *ProtocolManager, count int) error {
 		b.sectionCount, b.headNum, _ = pm.server.bloomTrieIndexer.Sections()
 	} else {
 		b.sectionCount, _, _ = pm.server.chtIndexer.Sections()
-		b.sectionCount /= (params.CHTFrequencyClient / params.CHTFrequencyServer)
-		b.headNum = b.sectionCount*params.CHTFrequencyClient - 1
+		b.headNum = b.sectionCount*params.CHTFrequency - 1
 	}
 	if b.sectionCount == 0 {
 		return fmt.Errorf("no processed sections available")
diff --git a/les/commons.go b/les/commons.go
index 21fb25714af..32fd654499d 100644
--- a/les/commons.go
+++ b/les/commons.go
@@ -80,28 +80,16 @@ func (c *lesCommons) nodeInfo() interface{} {
 	sections, _, _ := c.chtIndexer.Sections()
 	sections2, _, _ := c.bloomTrieIndexer.Sections()
 
-	if !c.protocolManager.lightSync {
-		// convert to client section size if running in server mode
-		sections /= c.iConfig.PairChtSize / c.iConfig.ChtSize
-	}
-
 	if sections2 < sections {
 		sections = sections2
 	}
 	if sections > 0 {
 		sectionIndex := sections - 1
 		sectionHead := c.bloomTrieIndexer.SectionHead(sectionIndex)
-		var chtRoot common.Hash
-		if c.protocolManager.lightSync {
-			chtRoot = light.GetChtRoot(c.chainDb, sectionIndex, sectionHead)
-		} else {
-			idxV2 := (sectionIndex+1)*c.iConfig.PairChtSize/c.iConfig.ChtSize - 1
-			chtRoot = light.GetChtRoot(c.chainDb, idxV2, sectionHead)
-		}
 		cht = params.TrustedCheckpoint{
 			SectionIndex: sectionIndex,
 			SectionHead:  sectionHead,
-			CHTRoot:      chtRoot,
+			CHTRoot:      light.GetChtRoot(c.chainDb, sectionIndex, sectionHead),
 			BloomRoot:    light.GetBloomTrieRoot(c.chainDb, sectionIndex, sectionHead),
 		}
 	}
diff --git a/les/costtracker.go b/les/costtracker.go
index 69531937ef5..014b888c01b 100644
--- a/les/costtracker.go
+++ b/les/costtracker.go
@@ -39,11 +39,8 @@ var (
 		GetBlockBodiesMsg:      {0, 700000},
 		GetReceiptsMsg:         {0, 1000000},
 		GetCodeMsg:             {0, 450000},
-		GetProofsV1Msg:         {0, 600000},
 		GetProofsV2Msg:         {0, 600000},
-		GetHeaderProofsMsg:     {0, 1000000},
 		GetHelperTrieProofsMsg: {0, 1000000},
-		SendTxMsg:              {0, 450000},
 		SendTxV2Msg:            {0, 450000},
 		GetTxStatusMsg:         {0, 250000},
 	}
@@ -53,11 +50,8 @@ var (
 		GetBlockBodiesMsg:      {0, 40},
 		GetReceiptsMsg:         {0, 40},
 		GetCodeMsg:             {0, 80},
-		GetProofsV1Msg:         {0, 80},
 		GetProofsV2Msg:         {0, 80},
-		GetHeaderProofsMsg:     {0, 20},
 		GetHelperTrieProofsMsg: {0, 20},
-		SendTxMsg:              {0, 66000},
 		SendTxV2Msg:            {0, 66000},
 		GetTxStatusMsg:         {0, 50},
 	}
@@ -67,11 +61,8 @@ var (
 		GetBlockBodiesMsg:      {0, 100000},
 		GetReceiptsMsg:         {0, 200000},
 		GetCodeMsg:             {0, 50000},
-		GetProofsV1Msg:         {0, 4000},
 		GetProofsV2Msg:         {0, 4000},
-		GetHeaderProofsMsg:     {0, 4000},
 		GetHelperTrieProofsMsg: {0, 4000},
-		SendTxMsg:              {0, 0},
 		SendTxV2Msg:            {0, 100},
 		GetTxStatusMsg:         {0, 100},
 	}
diff --git a/les/handler.go b/les/handler.go
index 7c290b717d8..9c72c6b1335 100644
--- a/les/handler.go
+++ b/les/handler.go
@@ -772,80 +772,6 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			Obj:     resp.Receipts,
 		}
 
-	case GetProofsV1Msg:
-		p.Log().Trace("Received proofs request")
-		// Decode the retrieval message
-		var req struct {
-			ReqID uint64
-			Reqs  []ProofReq
-		}
-		if err := msg.Decode(&req); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		// Gather state data until the fetch or network limits is reached
-		var (
-			bytes  int
-			proofs proofsData
-		)
-		reqCnt := len(req.Reqs)
-		if !accept(req.ReqID, uint64(reqCnt), MaxProofsFetch) {
-			return errResp(ErrRequestRejected, "")
-		}
-		go func() {
-			for i, req := range req.Reqs {
-				if i != 0 && !task.waitOrStop() {
-					return
-				}
-				// Look up the root hash belonging to the request
-				number := rawdb.ReadHeaderNumber(pm.chainDb, req.BHash)
-				if number == nil {
-					p.Log().Warn("Failed to retrieve block num for proof", "hash", req.BHash)
-					continue
-				}
-				header := rawdb.ReadHeader(pm.chainDb, req.BHash, *number)
-				if header == nil {
-					p.Log().Warn("Failed to retrieve header for proof", "block", *number, "hash", req.BHash)
-					continue
-				}
-				// Open the account or storage trie for the request
-				statedb := pm.blockchain.StateCache()
-
-				var trie state.Trie
-				switch len(req.AccKey) {
-				case 0:
-					// No account key specified, open an account trie
-					trie, err = statedb.OpenTrie(header.Root)
-					if trie == nil || err != nil {
-						p.Log().Warn("Failed to open storage trie for proof", "block", header.Number, "hash", header.Hash(), "root", header.Root, "err", err)
-						continue
-					}
-				default:
-					// Account key specified, open a storage trie
-					account, err := pm.getAccount(statedb.TrieDB(), header.Root, common.BytesToHash(req.AccKey))
-					if err != nil {
-						p.Log().Warn("Failed to retrieve account for proof", "block", header.Number, "hash", header.Hash(), "account", common.BytesToHash(req.AccKey), "err", err)
-						continue
-					}
-					trie, err = statedb.OpenStorageTrie(common.BytesToHash(req.AccKey), account.Root)
-					if trie == nil || err != nil {
-						p.Log().Warn("Failed to open storage trie for proof", "block", header.Number, "hash", header.Hash(), "account", common.BytesToHash(req.AccKey), "root", account.Root, "err", err)
-						continue
-					}
-				}
-				// Prove the user's request from the account or stroage trie
-				var proof light.NodeList
-				if err := trie.Prove(req.Key, 0, &proof); err != nil {
-					p.Log().Warn("Failed to prove state request", "block", header.Number, "hash", header.Hash(), "err", err)
-					continue
-				}
-				proofs = append(proofs, proof)
-				if bytes += proof.DataSize(); bytes >= softResponseLimit {
-					break
-				}
-			}
-			sendResponse(req.ReqID, uint64(reqCnt), p.ReplyProofs(req.ReqID, proofs), task.done())
-		}()
-
 	case GetProofsV2Msg:
 		p.Log().Trace("Received les/2 proofs request")
 		// Decode the retrieval message
@@ -927,27 +853,6 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			sendResponse(req.ReqID, uint64(reqCnt), p.ReplyProofsV2(req.ReqID, nodes.NodeList()), task.done())
 		}()
 
-	case ProofsV1Msg:
-		if pm.odr == nil {
-			return errResp(ErrUnexpectedResponse, "")
-		}
-
-		p.Log().Trace("Received proofs response")
-		// A batch of merkle proofs arrived to one of our previous requests
-		var resp struct {
-			ReqID, BV uint64
-			Data      []light.NodeList
-		}
-		if err := msg.Decode(&resp); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		p.fcServer.ReceivedReply(resp.ReqID, resp.BV)
-		deliverMsg = &Msg{
-			MsgType: MsgProofsV1,
-			ReqID:   resp.ReqID,
-			Obj:     resp.Data,
-		}
-
 	case ProofsV2Msg:
 		if pm.odr == nil {
 			return errResp(ErrUnexpectedResponse, "")
@@ -969,54 +874,6 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			Obj:     resp.Data,
 		}
 
-	case GetHeaderProofsMsg:
-		p.Log().Trace("Received headers proof request")
-		// Decode the retrieval message
-		var req struct {
-			ReqID uint64
-			Reqs  []ChtReq
-		}
-		if err := msg.Decode(&req); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		// Gather state data until the fetch or network limits is reached
-		var (
-			bytes  int
-			proofs []ChtResp
-		)
-		reqCnt := len(req.Reqs)
-		if !accept(req.ReqID, uint64(reqCnt), MaxHelperTrieProofsFetch) {
-			return errResp(ErrRequestRejected, "")
-		}
-		go func() {
-			trieDb := trie.NewDatabase(rawdb.NewTable(pm.chainDb, light.ChtTablePrefix))
-			for i, req := range req.Reqs {
-				if i != 0 && !task.waitOrStop() {
-					return
-				}
-				if header := pm.blockchain.GetHeaderByNumber(req.BlockNum); header != nil {
-					sectionHead := rawdb.ReadCanonicalHash(pm.chainDb, req.ChtNum*pm.iConfig.ChtSize-1)
-					if root := light.GetChtRoot(pm.chainDb, req.ChtNum-1, sectionHead); root != (common.Hash{}) {
-						trie, err := trie.New(root, trieDb)
-						if err != nil {
-							continue
-						}
-						var encNumber [8]byte
-						binary.BigEndian.PutUint64(encNumber[:], req.BlockNum)
-
-						var proof light.NodeList
-						trie.Prove(encNumber[:], 0, &proof)
-
-						proofs = append(proofs, ChtResp{Header: header, Proof: proof})
-						if bytes += proof.DataSize() + estHeaderRlpSize; bytes >= softResponseLimit {
-							break
-						}
-					}
-				}
-			}
-			sendResponse(req.ReqID, uint64(reqCnt), p.ReplyHeaderProofs(req.ReqID, proofs), task.done())
-		}()
-
 	case GetHelperTrieProofsMsg:
 		p.Log().Trace("Received helper trie proof request")
 		// Decode the retrieval message
@@ -1081,26 +938,6 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			sendResponse(req.ReqID, uint64(reqCnt), p.ReplyHelperTrieProofs(req.ReqID, HelperTrieResps{Proofs: nodes.NodeList(), AuxData: auxData}), task.done())
 		}()
 
-	case HeaderProofsMsg:
-		if pm.odr == nil {
-			return errResp(ErrUnexpectedResponse, "")
-		}
-
-		p.Log().Trace("Received headers proof response")
-		var resp struct {
-			ReqID, BV uint64
-			Data      []ChtResp
-		}
-		if err := msg.Decode(&resp); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		p.fcServer.ReceivedReply(resp.ReqID, resp.BV)
-		deliverMsg = &Msg{
-			MsgType: MsgHeaderProofs,
-			ReqID:   resp.ReqID,
-			Obj:     resp.Data,
-		}
-
 	case HelperTrieProofsMsg:
 		if pm.odr == nil {
 			return errResp(ErrUnexpectedResponse, "")
@@ -1122,29 +959,6 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			Obj:     resp.Data,
 		}
 
-	case SendTxMsg:
-		if pm.txpool == nil {
-			return errResp(ErrRequestRejected, "")
-		}
-		// Transactions arrived, parse all of them and deliver to the pool
-		var txs []*types.Transaction
-		if err := msg.Decode(&txs); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		reqCnt := len(txs)
-		if !accept(0, uint64(reqCnt), MaxTxSend) {
-			return errResp(ErrRequestRejected, "")
-		}
-		go func() {
-			for i, tx := range txs {
-				if i != 0 && !task.waitOrStop() {
-					return
-				}
-				pm.txpool.AddRemotes([]*types.Transaction{tx})
-			}
-			sendResponse(0, uint64(reqCnt), nil, task.done())
-		}()
-
 	case SendTxV2Msg:
 		if pm.txpool == nil {
 			return errResp(ErrRequestRejected, "")
@@ -1261,9 +1075,8 @@ func (pm *ProtocolManager) getAccount(triedb *trie.Database, root, hash common.H
 func (pm *ProtocolManager) getHelperTrie(id uint, idx uint64) (common.Hash, string) {
 	switch id {
 	case htCanonical:
-		idxV1 := (idx+1)*(pm.iConfig.PairChtSize/pm.iConfig.ChtSize) - 1
-		sectionHead := rawdb.ReadCanonicalHash(pm.chainDb, (idxV1+1)*pm.iConfig.ChtSize-1)
-		return light.GetChtRoot(pm.chainDb, idxV1, sectionHead), light.ChtTablePrefix
+		sectionHead := rawdb.ReadCanonicalHash(pm.chainDb, (idx+1)*pm.iConfig.ChtSize-1)
+		return light.GetChtRoot(pm.chainDb, idx, sectionHead), light.ChtTablePrefix
 	case htBloomBits:
 		sectionHead := rawdb.ReadCanonicalHash(pm.chainDb, (idx+1)*pm.iConfig.BloomTrieSize-1)
 		return light.GetBloomTrieRoot(pm.chainDb, idx, sectionHead), light.BloomTrieTablePrefix
diff --git a/les/handler_test.go b/les/handler_test.go
index 5cf31b8f57c..c1db65cf39a 100644
--- a/les/handler_test.go
+++ b/les/handler_test.go
@@ -46,7 +46,6 @@ func expectResponse(r p2p.MsgReader, msgcode, reqID, bv uint64, data interface{}
 }
 
 // Tests that block headers can be retrieved from a remote chain based on user queries.
-func TestGetBlockHeadersLes1(t *testing.T) { testGetBlockHeaders(t, 1) }
 func TestGetBlockHeadersLes2(t *testing.T) { testGetBlockHeaders(t, 2) }
 
 func testGetBlockHeaders(t *testing.T, protocol int) {
@@ -174,7 +173,6 @@ func testGetBlockHeaders(t *testing.T, protocol int) {
 }
 
 // Tests that block contents can be retrieved from a remote chain based on their hashes.
-func TestGetBlockBodiesLes1(t *testing.T) { testGetBlockBodies(t, 1) }
 func TestGetBlockBodiesLes2(t *testing.T) { testGetBlockBodies(t, 2) }
 
 func testGetBlockBodies(t *testing.T, protocol int) {
@@ -249,7 +247,6 @@ func testGetBlockBodies(t *testing.T, protocol int) {
 }
 
 // Tests that the contract codes can be retrieved based on account addresses.
-func TestGetCodeLes1(t *testing.T) { testGetCode(t, 1) }
 func TestGetCodeLes2(t *testing.T) { testGetCode(t, 2) }
 
 func testGetCode(t *testing.T, protocol int) {
@@ -281,7 +278,6 @@ func testGetCode(t *testing.T, protocol int) {
 }
 
 // Tests that the transaction receipts can be retrieved based on hashes.
-func TestGetReceiptLes1(t *testing.T) { testGetReceipt(t, 1) }
 func TestGetReceiptLes2(t *testing.T) { testGetReceipt(t, 2) }
 
 func testGetReceipt(t *testing.T, protocol int) {
@@ -307,7 +303,6 @@ func testGetReceipt(t *testing.T, protocol int) {
 }
 
 // Tests that trie merkle proofs can be retrieved
-func TestGetProofsLes1(t *testing.T) { testGetProofs(t, 1) }
 func TestGetProofsLes2(t *testing.T) { testGetProofs(t, 2) }
 
 func testGetProofs(t *testing.T, protocol int) {
@@ -316,10 +311,7 @@ func testGetProofs(t *testing.T, protocol int) {
 	defer tearDown()
 	bc := server.pm.blockchain.(*core.BlockChain)
 
-	var (
-		proofreqs []ProofReq
-		proofsV1  [][]rlp.RawValue
-	)
+	var proofreqs []ProofReq
 	proofsV2 := light.NewNodeSet()
 
 	accounts := []common.Address{testBankAddress, acc1Addr, acc2Addr, {}}
@@ -334,112 +326,61 @@ func testGetProofs(t *testing.T, protocol int) {
 				Key:   crypto.Keccak256(acc[:]),
 			}
 			proofreqs = append(proofreqs, req)
-
-			switch protocol {
-			case 1:
-				var proof light.NodeList
-				trie.Prove(crypto.Keccak256(acc[:]), 0, &proof)
-				proofsV1 = append(proofsV1, proof)
-			case 2:
-				trie.Prove(crypto.Keccak256(acc[:]), 0, proofsV2)
-			}
+			trie.Prove(crypto.Keccak256(acc[:]), 0, proofsV2)
 		}
 	}
 	// Send the proof request and verify the response
-	switch protocol {
-	case 1:
-		cost := server.tPeer.GetRequestCost(GetProofsV1Msg, len(proofreqs))
-		sendRequest(server.tPeer.app, GetProofsV1Msg, 42, cost, proofreqs)
-		if err := expectResponse(server.tPeer.app, ProofsV1Msg, 42, testBufLimit, proofsV1); err != nil {
-			t.Errorf("proofs mismatch: %v", err)
-		}
-	case 2:
-		cost := server.tPeer.GetRequestCost(GetProofsV2Msg, len(proofreqs))
-		sendRequest(server.tPeer.app, GetProofsV2Msg, 42, cost, proofreqs)
-		if err := expectResponse(server.tPeer.app, ProofsV2Msg, 42, testBufLimit, proofsV2.NodeList()); err != nil {
-			t.Errorf("proofs mismatch: %v", err)
-		}
+	cost := server.tPeer.GetRequestCost(GetProofsV2Msg, len(proofreqs))
+	sendRequest(server.tPeer.app, GetProofsV2Msg, 42, cost, proofreqs)
+	if err := expectResponse(server.tPeer.app, ProofsV2Msg, 42, testBufLimit, proofsV2.NodeList()); err != nil {
+		t.Errorf("proofs mismatch: %v", err)
 	}
 }
 
 // Tests that CHT proofs can be correctly retrieved.
-func TestGetCHTProofsLes1(t *testing.T) { testGetCHTProofs(t, 1) }
 func TestGetCHTProofsLes2(t *testing.T) { testGetCHTProofs(t, 2) }
 
 func testGetCHTProofs(t *testing.T, protocol int) {
 	config := light.TestServerIndexerConfig
-	frequency := config.ChtSize
-	if protocol == 2 {
-		frequency = config.PairChtSize
-	}
 
 	waitIndexers := func(cIndexer, bIndexer, btIndexer *core.ChainIndexer) {
-		expectSections := frequency / config.ChtSize
 		for {
 			cs, _, _ := cIndexer.Sections()
-			bs, _, _ := bIndexer.Sections()
-			if cs >= expectSections && bs >= expectSections {
+			if cs >= 1 {
 				break
 			}
 			time.Sleep(10 * time.Millisecond)
 		}
 	}
-	server, tearDown := newServerEnv(t, int(frequency+config.ChtConfirms), protocol, waitIndexers)
+	server, tearDown := newServerEnv(t, int(config.ChtSize+config.ChtConfirms), protocol, waitIndexers)
 	defer tearDown()
 	bc := server.pm.blockchain.(*core.BlockChain)
 
 	// Assemble the proofs from the different protocols
-	header := bc.GetHeaderByNumber(frequency - 1)
+	header := bc.GetHeaderByNumber(config.ChtSize - 1)
 	rlp, _ := rlp.EncodeToBytes(header)
 
 	key := make([]byte, 8)
-	binary.BigEndian.PutUint64(key, frequency-1)
+	binary.BigEndian.PutUint64(key, config.ChtSize-1)
 
-	proofsV1 := []ChtResp{{
-		Header: header,
-	}}
 	proofsV2 := HelperTrieResps{
 		AuxData: [][]byte{rlp},
 	}
-	switch protocol {
-	case 1:
-		root := light.GetChtRoot(server.db, 0, bc.GetHeaderByNumber(frequency-1).Hash())
-		trie, _ := trie.New(root, trie.NewDatabase(rawdb.NewTable(server.db, light.ChtTablePrefix)))
-
-		var proof light.NodeList
-		trie.Prove(key, 0, &proof)
-		proofsV1[0].Proof = proof
-
-	case 2:
-		root := light.GetChtRoot(server.db, (frequency/config.ChtSize)-1, bc.GetHeaderByNumber(frequency-1).Hash())
-		trie, _ := trie.New(root, trie.NewDatabase(rawdb.NewTable(server.db, light.ChtTablePrefix)))
-		trie.Prove(key, 0, &proofsV2.Proofs)
-	}
+	root := light.GetChtRoot(server.db, 0, bc.GetHeaderByNumber(config.ChtSize-1).Hash())
+	trie, _ := trie.New(root, trie.NewDatabase(rawdb.NewTable(server.db, light.ChtTablePrefix)))
+	trie.Prove(key, 0, &proofsV2.Proofs)
 	// Assemble the requests for the different protocols
-	requestsV1 := []ChtReq{{
-		ChtNum:   frequency / config.ChtSize,
-		BlockNum: frequency - 1,
-	}}
 	requestsV2 := []HelperTrieReq{{
 		Type:    htCanonical,
-		TrieIdx: frequency/config.PairChtSize - 1,
+		TrieIdx: 0,
 		Key:     key,
 		AuxReq:  auxHeader,
 	}}
 	// Send the proof request and verify the response
-	switch protocol {
-	case 1:
-		cost := server.tPeer.GetRequestCost(GetHeaderProofsMsg, len(requestsV1))
-		sendRequest(server.tPeer.app, GetHeaderProofsMsg, 42, cost, requestsV1)
-		if err := expectResponse(server.tPeer.app, HeaderProofsMsg, 42, testBufLimit, proofsV1); err != nil {
-			t.Errorf("proofs mismatch: %v", err)
-		}
-	case 2:
-		cost := server.tPeer.GetRequestCost(GetHelperTrieProofsMsg, len(requestsV2))
-		sendRequest(server.tPeer.app, GetHelperTrieProofsMsg, 42, cost, requestsV2)
-		if err := expectResponse(server.tPeer.app, HelperTrieProofsMsg, 42, testBufLimit, proofsV2); err != nil {
-			t.Errorf("proofs mismatch: %v", err)
-		}
+	cost := server.tPeer.GetRequestCost(GetHelperTrieProofsMsg, len(requestsV2))
+	sendRequest(server.tPeer.app, GetHelperTrieProofsMsg, 42, cost, requestsV2)
+	if err := expectResponse(server.tPeer.app, HelperTrieProofsMsg, 42, testBufLimit, proofsV2); err != nil {
+		t.Errorf("proofs mismatch: %v", err)
 	}
 }
 
@@ -449,10 +390,8 @@ func TestGetBloombitsProofs(t *testing.T) {
 
 	waitIndexers := func(cIndexer, bIndexer, btIndexer *core.ChainIndexer) {
 		for {
-			cs, _, _ := cIndexer.Sections()
-			bs, _, _ := bIndexer.Sections()
 			bts, _, _ := btIndexer.Sections()
-			if cs >= 8 && bs >= 8 && bts >= 1 {
+			if bts >= 1 {
 				break
 			}
 			time.Sleep(10 * time.Millisecond)
diff --git a/les/odr.go b/les/odr.go
index 5d98c66a907..daf2ea19ed4 100644
--- a/les/odr.go
+++ b/les/odr.go
@@ -84,9 +84,7 @@ const (
 	MsgBlockBodies = iota
 	MsgCode
 	MsgReceipts
-	MsgProofsV1
 	MsgProofsV2
-	MsgHeaderProofs
 	MsgHelperTrieProofs
 )
 
diff --git a/les/odr_requests.go b/les/odr_requests.go
index 6bd4a29310a..66d6175b8a3 100644
--- a/les/odr_requests.go
+++ b/les/odr_requests.go
@@ -188,14 +188,7 @@ 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 (r *TrieRequest) GetCost(peer *peer) uint64 {
-	switch peer.version {
-	case lpv1:
-		return peer.GetRequestCost(GetProofsV1Msg, 1)
-	case lpv2:
-		return peer.GetRequestCost(GetProofsV2Msg, 1)
-	default:
-		panic(nil)
-	}
+	return peer.GetRequestCost(GetProofsV2Msg, 1)
 }
 
 // CanSend tells if a certain peer is suitable for serving the given request
@@ -220,38 +213,22 @@ func (r *TrieRequest) Request(reqID uint64, peer *peer) error {
 func (r *TrieRequest) Validate(db ethdb.Database, msg *Msg) error {
 	log.Debug("Validating trie proof", "root", r.Id.Root, "key", r.Key)
 
-	switch msg.MsgType {
-	case MsgProofsV1:
-		proofs := msg.Obj.([]light.NodeList)
-		if len(proofs) != 1 {
-			return errInvalidEntryCount
-		}
-		nodeSet := proofs[0].NodeSet()
-		// Verify the proof and store if checks out
-		if _, _, err := trie.VerifyProof(r.Id.Root, r.Key, nodeSet); err != nil {
-			return fmt.Errorf("merkle proof verification failed: %v", err)
-		}
-		r.Proof = nodeSet
-		return nil
-
-	case MsgProofsV2:
-		proofs := msg.Obj.(light.NodeList)
-		// Verify the proof and store if checks out
-		nodeSet := proofs.NodeSet()
-		reads := &readTraceDB{db: nodeSet}
-		if _, _, err := trie.VerifyProof(r.Id.Root, r.Key, reads); err != nil {
-			return fmt.Errorf("merkle proof verification failed: %v", err)
-		}
-		// check if all nodes have been read by VerifyProof
-		if len(reads.reads) != nodeSet.KeyCount() {
-			return errUselessNodes
-		}
-		r.Proof = nodeSet
-		return nil
-
-	default:
+	if msg.MsgType != MsgProofsV2 {
 		return errInvalidMessageType
 	}
+	proofs := msg.Obj.(light.NodeList)
+	// Verify the proof and store if checks out
+	nodeSet := proofs.NodeSet()
+	reads := &readTraceDB{db: nodeSet}
+	if _, _, err := trie.VerifyProof(r.Id.Root, r.Key, reads); err != nil {
+		return fmt.Errorf("merkle proof verification failed: %v", err)
+	}
+	// check if all nodes have been read by VerifyProof
+	if len(reads.reads) != nodeSet.KeyCount() {
+		return errUselessNodes
+	}
+	r.Proof = nodeSet
+	return nil
 }
 
 type CodeReq struct {
@@ -330,32 +307,13 @@ type HelperTrieResps struct { // describes all responses, not just a single one
 	AuxData [][]byte
 }
 
-// legacy LES/1
-type ChtReq struct {
-	ChtNum, BlockNum uint64
-	FromLevel        uint
-}
-
-// legacy LES/1
-type ChtResp struct {
-	Header *types.Header
-	Proof  []rlp.RawValue
-}
-
 // ODR request type for requesting headers by Canonical Hash Trie, see LesOdrRequest interface
 type ChtRequest light.ChtRequest
 
 // GetCost returns the cost of the given ODR request according to the serving
 // peer's cost table (implementation of LesOdrRequest)
 func (r *ChtRequest) GetCost(peer *peer) uint64 {
-	switch peer.version {
-	case lpv1:
-		return peer.GetRequestCost(GetHeaderProofsMsg, 1)
-	case lpv2:
-		return peer.GetRequestCost(GetHelperTrieProofsMsg, 1)
-	default:
-		panic(nil)
-	}
+	return peer.GetRequestCost(GetHelperTrieProofsMsg, 1)
 }
 
 // CanSend tells if a certain peer is suitable for serving the given request
@@ -377,21 +335,7 @@ func (r *ChtRequest) Request(reqID uint64, peer *peer) error {
 		Key:     encNum[:],
 		AuxReq:  auxHeader,
 	}
-	switch peer.version {
-	case lpv1:
-		var reqsV1 ChtReq
-		if req.Type != htCanonical || req.AuxReq != auxHeader || len(req.Key) != 8 {
-			return fmt.Errorf("Request invalid in LES/1 mode")
-		}
-		blockNum := binary.BigEndian.Uint64(req.Key)
-		// convert HelperTrie request to old CHT request
-		reqsV1 = ChtReq{ChtNum: (req.TrieIdx + 1) * (r.Config.ChtSize / r.Config.PairChtSize), BlockNum: blockNum, FromLevel: req.FromLevel}
-		return peer.RequestHelperTrieProofs(reqID, r.GetCost(peer), []ChtReq{reqsV1})
-	case lpv2:
-		return peer.RequestHelperTrieProofs(reqID, r.GetCost(peer), []HelperTrieReq{req})
-	default:
-		panic(nil)
-	}
+	return peer.RequestHelperTrieProofs(reqID, r.GetCost(peer), []HelperTrieReq{req})
 }
 
 // Valid processes an ODR request reply message from the LES network
@@ -400,78 +344,50 @@ func (r *ChtRequest) Request(reqID uint64, peer *peer) error {
 func (r *ChtRequest) Validate(db ethdb.Database, msg *Msg) error {
 	log.Debug("Validating CHT", "cht", r.ChtNum, "block", r.BlockNum)
 
-	switch msg.MsgType {
-	case MsgHeaderProofs: // LES/1 backwards compatibility
-		proofs := msg.Obj.([]ChtResp)
-		if len(proofs) != 1 {
-			return errInvalidEntryCount
-		}
-		proof := proofs[0]
-
-		// Verify the CHT
-		var encNumber [8]byte
-		binary.BigEndian.PutUint64(encNumber[:], r.BlockNum)
-
-		value, _, err := trie.VerifyProof(r.ChtRoot, encNumber[:], light.NodeList(proof.Proof).NodeSet())
-		if err != nil {
-			return err
-		}
-		var node light.ChtNode
-		if err := rlp.DecodeBytes(value, &node); err != nil {
-			return err
-		}
-		if node.Hash != proof.Header.Hash() {
-			return errCHTHashMismatch
-		}
-		// Verifications passed, store and return
-		r.Header = proof.Header
-		r.Proof = light.NodeList(proof.Proof).NodeSet()
-		r.Td = node.Td
-	case MsgHelperTrieProofs:
-		resp := msg.Obj.(HelperTrieResps)
-		if len(resp.AuxData) != 1 {
-			return errInvalidEntryCount
-		}
-		nodeSet := resp.Proofs.NodeSet()
-		headerEnc := resp.AuxData[0]
-		if len(headerEnc) == 0 {
-			return errHeaderUnavailable
-		}
-		header := new(types.Header)
-		if err := rlp.DecodeBytes(headerEnc, header); err != nil {
-			return errHeaderUnavailable
-		}
+	if msg.MsgType != MsgHelperTrieProofs {
+		return errInvalidMessageType
+	}
+	resp := msg.Obj.(HelperTrieResps)
+	if len(resp.AuxData) != 1 {
+		return errInvalidEntryCount
+	}
+	nodeSet := resp.Proofs.NodeSet()
+	headerEnc := resp.AuxData[0]
+	if len(headerEnc) == 0 {
+		return errHeaderUnavailable
+	}
+	header := new(types.Header)
+	if err := rlp.DecodeBytes(headerEnc, header); err != nil {
+		return errHeaderUnavailable
+	}
 
-		// Verify the CHT
-		var encNumber [8]byte
-		binary.BigEndian.PutUint64(encNumber[:], r.BlockNum)
+	// Verify the CHT
+	var encNumber [8]byte
+	binary.BigEndian.PutUint64(encNumber[:], r.BlockNum)
 
-		reads := &readTraceDB{db: nodeSet}
-		value, _, err := trie.VerifyProof(r.ChtRoot, encNumber[:], reads)
-		if err != nil {
-			return fmt.Errorf("merkle proof verification failed: %v", err)
-		}
-		if len(reads.reads) != nodeSet.KeyCount() {
-			return errUselessNodes
-		}
+	reads := &readTraceDB{db: nodeSet}
+	value, _, err := trie.VerifyProof(r.ChtRoot, encNumber[:], reads)
+	if err != nil {
+		return fmt.Errorf("merkle proof verification failed: %v", err)
+	}
+	if len(reads.reads) != nodeSet.KeyCount() {
+		return errUselessNodes
+	}
 
-		var node light.ChtNode
-		if err := rlp.DecodeBytes(value, &node); err != nil {
-			return err
-		}
-		if node.Hash != header.Hash() {
-			return errCHTHashMismatch
-		}
-		if r.BlockNum != header.Number.Uint64() {
-			return errCHTNumberMismatch
-		}
-		// Verifications passed, store and return
-		r.Header = header
-		r.Proof = nodeSet
-		r.Td = node.Td
-	default:
-		return errInvalidMessageType
+	var node light.ChtNode
+	if err := rlp.DecodeBytes(value, &node); err != nil {
+		return err
+	}
+	if node.Hash != header.Hash() {
+		return errCHTHashMismatch
+	}
+	if r.BlockNum != header.Number.Uint64() {
+		return errCHTNumberMismatch
 	}
+	// Verifications passed, store and return
+	r.Header = header
+	r.Proof = nodeSet
+	r.Td = node.Td
 	return nil
 }
 
diff --git a/les/odr_test.go b/les/odr_test.go
index ac81fbcf02f..bc587a1832d 100644
--- a/les/odr_test.go
+++ b/les/odr_test.go
@@ -38,8 +38,6 @@ import (
 
 type odrTestFn func(ctx context.Context, db ethdb.Database, config *params.ChainConfig, bc *core.BlockChain, lc *light.LightChain, bhash common.Hash) []byte
 
-func TestOdrGetBlockLes1(t *testing.T) { testOdr(t, 1, 1, odrGetBlock) }
-
 func TestOdrGetBlockLes2(t *testing.T) { testOdr(t, 2, 1, odrGetBlock) }
 
 func odrGetBlock(ctx context.Context, db ethdb.Database, config *params.ChainConfig, bc *core.BlockChain, lc *light.LightChain, bhash common.Hash) []byte {
@@ -56,8 +54,6 @@ func odrGetBlock(ctx context.Context, db ethdb.Database, config *params.ChainCon
 	return rlp
 }
 
-func TestOdrGetReceiptsLes1(t *testing.T) { testOdr(t, 1, 1, odrGetReceipts) }
-
 func TestOdrGetReceiptsLes2(t *testing.T) { testOdr(t, 2, 1, odrGetReceipts) }
 
 func odrGetReceipts(ctx context.Context, db ethdb.Database, config *params.ChainConfig, bc *core.BlockChain, lc *light.LightChain, bhash common.Hash) []byte {
@@ -78,8 +74,6 @@ func odrGetReceipts(ctx context.Context, db ethdb.Database, config *params.Chain
 	return rlp
 }
 
-func TestOdrAccountsLes1(t *testing.T) { testOdr(t, 1, 1, odrAccounts) }
-
 func TestOdrAccountsLes2(t *testing.T) { testOdr(t, 2, 1, odrAccounts) }
 
 func odrAccounts(ctx context.Context, db ethdb.Database, config *params.ChainConfig, bc *core.BlockChain, lc *light.LightChain, bhash common.Hash) []byte {
@@ -108,8 +102,6 @@ func odrAccounts(ctx context.Context, db ethdb.Database, config *params.ChainCon
 	return res
 }
 
-func TestOdrContractCallLes1(t *testing.T) { testOdr(t, 1, 2, odrContractCall) }
-
 func TestOdrContractCallLes2(t *testing.T) { testOdr(t, 2, 2, odrContractCall) }
 
 type callmsg struct {
diff --git a/les/peer.go b/les/peer.go
index 0c15add9c6b..bf3f0f7621c 100644
--- a/les/peer.go
+++ b/les/peer.go
@@ -34,10 +34,9 @@ import (
 )
 
 var (
-	errClosed             = errors.New("peer set is closed")
-	errAlreadyRegistered  = errors.New("peer is already registered")
-	errNotRegistered      = errors.New("peer is not registered")
-	errInvalidHelpTrieReq = errors.New("invalid help trie request")
+	errClosed            = errors.New("peer set is closed")
+	errAlreadyRegistered = errors.New("peer is already registered")
+	errNotRegistered     = errors.New("peer is not registered")
 )
 
 const maxResponseErrors = 50 // number of invalid responses tolerated (makes the protocol less brittle but still avoids spam)
@@ -244,18 +243,8 @@ func (p *peer) GetTxRelayCost(amount, size int) uint64 {
 	p.lock.RLock()
 	defer p.lock.RUnlock()
 
-	var msgcode uint64
-	switch p.version {
-	case lpv1:
-		msgcode = SendTxMsg
-	case lpv2:
-		msgcode = SendTxV2Msg
-	default:
-		panic(nil)
-	}
-
-	cost := p.fcCosts[msgcode].baseCost + p.fcCosts[msgcode].reqCost*uint64(amount)
-	sizeCost := p.fcCosts[msgcode].baseCost + p.fcCosts[msgcode].reqCost*uint64(size)/txSizeCostLimit
+	cost := p.fcCosts[SendTxV2Msg].baseCost + p.fcCosts[SendTxV2Msg].reqCost*uint64(amount)
+	sizeCost := p.fcCosts[SendTxV2Msg].baseCost + p.fcCosts[SendTxV2Msg].reqCost*uint64(size)/txSizeCostLimit
 	if sizeCost > cost {
 		cost = sizeCost
 	}
@@ -307,24 +296,12 @@ func (p *peer) ReplyReceiptsRLP(reqID uint64, receipts []rlp.RawValue) *reply {
 	return &reply{p.rw, ReceiptsMsg, reqID, data}
 }
 
-// ReplyProofs creates a reply with a batch of legacy LES/1 merkle proofs, corresponding to the ones requested.
-func (p *peer) ReplyProofs(reqID uint64, proofs proofsData) *reply {
-	data, _ := rlp.EncodeToBytes(proofs)
-	return &reply{p.rw, ProofsV1Msg, reqID, data}
-}
-
 // ReplyProofsV2 creates a reply with a batch of merkle proofs, corresponding to the ones requested.
 func (p *peer) ReplyProofsV2(reqID uint64, proofs light.NodeList) *reply {
 	data, _ := rlp.EncodeToBytes(proofs)
 	return &reply{p.rw, ProofsV2Msg, reqID, data}
 }
 
-// ReplyHeaderProofs creates a reply with a batch of legacy LES/1 header proofs, corresponding to the ones requested.
-func (p *peer) ReplyHeaderProofs(reqID uint64, proofs []ChtResp) *reply {
-	data, _ := rlp.EncodeToBytes(proofs)
-	return &reply{p.rw, HeaderProofsMsg, reqID, data}
-}
-
 // ReplyHelperTrieProofs creates a reply with a batch of HelperTrie proofs, corresponding to the ones requested.
 func (p *peer) ReplyHelperTrieProofs(reqID uint64, resp HelperTrieResps) *reply {
 	data, _ := rlp.EncodeToBytes(resp)
@@ -374,36 +351,13 @@ func (p *peer) RequestReceipts(reqID, cost uint64, hashes []common.Hash) error {
 // RequestProofs fetches a batch of merkle proofs from a remote node.
 func (p *peer) RequestProofs(reqID, cost uint64, reqs []ProofReq) error {
 	p.Log().Debug("Fetching batch of proofs", "count", len(reqs))
-	switch p.version {
-	case lpv1:
-		return sendRequest(p.rw, GetProofsV1Msg, reqID, cost, reqs)
-	case lpv2:
-		return sendRequest(p.rw, GetProofsV2Msg, reqID, cost, reqs)
-	default:
-		panic(nil)
-	}
+	return sendRequest(p.rw, GetProofsV2Msg, reqID, cost, reqs)
 }
 
 // RequestHelperTrieProofs fetches a batch of HelperTrie merkle proofs from a remote node.
-func (p *peer) RequestHelperTrieProofs(reqID, cost uint64, data interface{}) error {
-	switch p.version {
-	case lpv1:
-		reqs, ok := data.([]ChtReq)
-		if !ok {
-			return errInvalidHelpTrieReq
-		}
-		p.Log().Debug("Fetching batch of header proofs", "count", len(reqs))
-		return sendRequest(p.rw, GetHeaderProofsMsg, reqID, cost, reqs)
-	case lpv2:
-		reqs, ok := data.([]HelperTrieReq)
-		if !ok {
-			return errInvalidHelpTrieReq
-		}
-		p.Log().Debug("Fetching batch of HelperTrie proofs", "count", len(reqs))
-		return sendRequest(p.rw, GetHelperTrieProofsMsg, reqID, cost, reqs)
-	default:
-		panic(nil)
-	}
+func (p *peer) RequestHelperTrieProofs(reqID, cost uint64, reqs []HelperTrieReq) error {
+	p.Log().Debug("Fetching batch of HelperTrie proofs", "count", len(reqs))
+	return sendRequest(p.rw, GetHelperTrieProofsMsg, reqID, cost, reqs)
 }
 
 // RequestTxStatus fetches a batch of transaction status records from a remote node.
@@ -415,14 +369,7 @@ func (p *peer) RequestTxStatus(reqID, cost uint64, txHashes []common.Hash) error
 // SendTxStatus creates a reply with a batch of transactions to be added to the remote transaction pool.
 func (p *peer) SendTxs(reqID, cost uint64, txs rlp.RawValue) error {
 	p.Log().Debug("Sending batch of transactions", "size", len(txs))
-	switch p.version {
-	case lpv1:
-		return p2p.Send(p.rw, SendTxMsg, txs) // old message format does not include reqID
-	case lpv2:
-		return sendRequest(p.rw, SendTxV2Msg, reqID, cost, txs)
-	default:
-		panic(nil)
-	}
+	return sendRequest(p.rw, SendTxV2Msg, reqID, cost, txs)
 }
 
 type keyValueEntry struct {
diff --git a/les/protocol.go b/les/protocol.go
index 65395ac0520..86e450d01c5 100644
--- a/les/protocol.go
+++ b/les/protocol.go
@@ -33,19 +33,18 @@ import (
 
 // Constants to match up protocol versions and messages
 const (
-	lpv1 = 1
 	lpv2 = 2
 )
 
 // Supported versions of the les protocol (first is primary)
 var (
-	ClientProtocolVersions    = []uint{lpv2, lpv1}
-	ServerProtocolVersions    = []uint{lpv2, lpv1}
+	ClientProtocolVersions    = []uint{lpv2}
+	ServerProtocolVersions    = []uint{lpv2}
 	AdvertiseProtocolVersions = []uint{lpv2} // clients are searching for the first advertised protocol in the list
 )
 
 // Number of implemented message corresponding to different protocol versions.
-var ProtocolLengths = map[uint]uint64{lpv1: 15, lpv2: 22}
+var ProtocolLengths = map[uint]uint64{lpv2: 22}
 
 const (
 	NetworkId          = 1
@@ -54,7 +53,7 @@ const (
 
 // les protocol message codes
 const (
-	// Protocol messages belonging to LPV1
+	// Protocol messages inherited from LPV1
 	StatusMsg          = 0x00
 	AnnounceMsg        = 0x01
 	GetBlockHeadersMsg = 0x02
@@ -63,14 +62,9 @@ const (
 	BlockBodiesMsg     = 0x05
 	GetReceiptsMsg     = 0x06
 	ReceiptsMsg        = 0x07
-	GetProofsV1Msg     = 0x08
-	ProofsV1Msg        = 0x09
 	GetCodeMsg         = 0x0a
 	CodeMsg            = 0x0b
-	SendTxMsg          = 0x0c
-	GetHeaderProofsMsg = 0x0d
-	HeaderProofsMsg    = 0x0e
-	// Protocol messages belonging to LPV2
+	// Protocol messages introduced in LPV2
 	GetProofsV2Msg         = 0x0f
 	ProofsV2Msg            = 0x10
 	GetHelperTrieProofsMsg = 0x11
@@ -89,10 +83,7 @@ var requests = map[uint64]requestInfo{
 	GetBlockHeadersMsg:     {"GetBlockHeaders", MaxHeaderFetch},
 	GetBlockBodiesMsg:      {"GetBlockBodies", MaxBodyFetch},
 	GetReceiptsMsg:         {"GetReceipts", MaxReceiptFetch},
-	GetProofsV1Msg:         {"GetProofsV1", MaxProofsFetch},
 	GetCodeMsg:             {"GetCode", MaxCodeFetch},
-	SendTxMsg:              {"SendTx", MaxTxSend},
-	GetHeaderProofsMsg:     {"GetHeaderProofs", MaxHelperTrieProofsFetch},
 	GetProofsV2Msg:         {"GetProofsV2", MaxProofsFetch},
 	GetHelperTrieProofsMsg: {"GetHelperTrieProofs", MaxHelperTrieProofsFetch},
 	SendTxV2Msg:            {"SendTxV2", MaxTxSend},
diff --git a/les/request_test.go b/les/request_test.go
index c9c18519828..e0d00d18c5d 100644
--- a/les/request_test.go
+++ b/les/request_test.go
@@ -36,24 +36,18 @@ func secAddr(addr common.Address) []byte {
 
 type accessTestFn func(db ethdb.Database, bhash common.Hash, number uint64) light.OdrRequest
 
-func TestBlockAccessLes1(t *testing.T) { testAccess(t, 1, tfBlockAccess) }
-
 func TestBlockAccessLes2(t *testing.T) { testAccess(t, 2, tfBlockAccess) }
 
 func tfBlockAccess(db ethdb.Database, bhash common.Hash, number uint64) light.OdrRequest {
 	return &light.BlockRequest{Hash: bhash, Number: number}
 }
 
-func TestReceiptsAccessLes1(t *testing.T) { testAccess(t, 1, tfReceiptsAccess) }
-
 func TestReceiptsAccessLes2(t *testing.T) { testAccess(t, 2, tfReceiptsAccess) }
 
 func tfReceiptsAccess(db ethdb.Database, bhash common.Hash, number uint64) light.OdrRequest {
 	return &light.ReceiptsRequest{Hash: bhash, Number: number}
 }
 
-func TestTrieEntryAccessLes1(t *testing.T) { testAccess(t, 1, tfTrieEntryAccess) }
-
 func TestTrieEntryAccessLes2(t *testing.T) { testAccess(t, 2, tfTrieEntryAccess) }
 
 func tfTrieEntryAccess(db ethdb.Database, bhash common.Hash, number uint64) light.OdrRequest {
@@ -63,8 +57,6 @@ func tfTrieEntryAccess(db ethdb.Database, bhash common.Hash, number uint64) ligh
 	return nil
 }
 
-func TestCodeAccessLes1(t *testing.T) { testAccess(t, 1, tfCodeAccess) }
-
 func TestCodeAccessLes2(t *testing.T) { testAccess(t, 2, tfCodeAccess) }
 
 func tfCodeAccess(db ethdb.Database, bhash common.Hash, num uint64) light.OdrRequest {
diff --git a/les/server.go b/les/server.go
index 3716685e179..6c2b227f424 100644
--- a/les/server.go
+++ b/les/server.go
@@ -89,7 +89,7 @@ func NewLesServer(eth *eth.Ethereum, config *eth.Config) (*LesServer, error) {
 			config:           config,
 			chainDb:          eth.ChainDb(),
 			iConfig:          light.DefaultServerIndexerConfig,
-			chtIndexer:       light.NewChtIndexer(eth.ChainDb(), nil, params.CHTFrequencyServer, params.HelperTrieProcessConfirmations),
+			chtIndexer:       light.NewChtIndexer(eth.ChainDb(), nil, params.CHTFrequency, params.HelperTrieProcessConfirmations),
 			bloomTrieIndexer: light.NewBloomTrieIndexer(eth.ChainDb(), nil, params.BloomBitsBlocks, params.BloomTrieFrequency),
 			protocolManager:  pm,
 		},
@@ -108,15 +108,11 @@ func NewLesServer(eth *eth.Ethereum, config *eth.Config) (*LesServer, error) {
 	srv.thcBlockProcessing = config.LightServ/100 + 1
 	srv.fcManager = flowcontrol.NewClientManager(nil, &mclock.System{})
 
-	chtV1SectionCount, _, _ := srv.chtIndexer.Sections() // indexer still uses LES/1 4k section size for backwards server compatibility
-	chtV2SectionCount := chtV1SectionCount / (params.CHTFrequencyClient / params.CHTFrequencyServer)
-	if chtV2SectionCount != 0 {
-		// convert to LES/2 section
-		chtLastSection := chtV2SectionCount - 1
-		// convert last LES/2 section index back to LES/1 index for chtIndexer.SectionHead
-		chtLastSectionV1 := (chtLastSection+1)*(params.CHTFrequencyClient/params.CHTFrequencyServer) - 1
-		chtSectionHead := srv.chtIndexer.SectionHead(chtLastSectionV1)
-		chtRoot := light.GetChtRoot(pm.chainDb, chtLastSectionV1, chtSectionHead)
+	chtSectionCount, _, _ := srv.chtIndexer.Sections()
+	if chtSectionCount != 0 {
+		chtLastSection := chtSectionCount - 1
+		chtSectionHead := srv.chtIndexer.SectionHead(chtLastSection)
+		chtRoot := light.GetChtRoot(pm.chainDb, chtLastSection, chtSectionHead)
 		logger.Info("Loaded CHT", "section", chtLastSection, "head", chtSectionHead, "root", chtRoot)
 	}
 	bloomTrieSectionCount, _, _ := srv.bloomTrieIndexer.Sections()
diff --git a/light/odr_test.go b/light/odr_test.go
index c1762c43ec9..55725d84e0a 100644
--- a/light/odr_test.go
+++ b/light/odr_test.go
@@ -99,7 +99,7 @@ func (odr *testOdr) IndexerConfig() *IndexerConfig {
 
 type odrTestFn func(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) ([]byte, error)
 
-func TestOdrGetBlockLes1(t *testing.T) { testChainOdr(t, 1, odrGetBlock) }
+func TestOdrGetBlockLes2(t *testing.T) { testChainOdr(t, 1, odrGetBlock) }
 
 func odrGetBlock(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) ([]byte, error) {
 	var block *types.Block
@@ -115,7 +115,7 @@ func odrGetBlock(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc
 	return rlp, nil
 }
 
-func TestOdrGetReceiptsLes1(t *testing.T) { testChainOdr(t, 1, odrGetReceipts) }
+func TestOdrGetReceiptsLes2(t *testing.T) { testChainOdr(t, 1, odrGetReceipts) }
 
 func odrGetReceipts(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) ([]byte, error) {
 	var receipts types.Receipts
@@ -137,7 +137,7 @@ func odrGetReceipts(ctx context.Context, db ethdb.Database, bc *core.BlockChain,
 	return rlp, nil
 }
 
-func TestOdrAccountsLes1(t *testing.T) { testChainOdr(t, 1, odrAccounts) }
+func TestOdrAccountsLes2(t *testing.T) { testChainOdr(t, 1, odrAccounts) }
 
 func odrAccounts(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc *LightChain, bhash common.Hash) ([]byte, error) {
 	dummyAddr := common.HexToAddress("1234567812345678123456781234567812345678")
@@ -161,7 +161,7 @@ func odrAccounts(ctx context.Context, db ethdb.Database, bc *core.BlockChain, lc
 	return res, st.Error()
 }
 
-func TestOdrContractCallLes1(t *testing.T) { testChainOdr(t, 1, odrContractCall) }
+func TestOdrContractCallLes2(t *testing.T) { testChainOdr(t, 1, odrContractCall) }
 
 type callmsg struct {
 	types.Message
diff --git a/light/postprocess.go b/light/postprocess.go
index 306de46940c..2a837e6c1d8 100644
--- a/light/postprocess.go
+++ b/light/postprocess.go
@@ -41,9 +41,6 @@ type IndexerConfig struct {
 	// The block frequency for creating CHTs.
 	ChtSize uint64
 
-	// A special auxiliary field represents client's chtsize for server config, otherwise represents server's chtsize.
-	PairChtSize uint64
-
 	// The number of confirmations needed to generate/accept a canonical hash help trie.
 	ChtConfirms uint64
 
@@ -64,8 +61,7 @@ type IndexerConfig struct {
 var (
 	// DefaultServerIndexerConfig wraps a set of configs as a default indexer config for server side.
 	DefaultServerIndexerConfig = &IndexerConfig{
-		ChtSize:           params.CHTFrequencyServer,
-		PairChtSize:       params.CHTFrequencyClient,
+		ChtSize:           params.CHTFrequency,
 		ChtConfirms:       params.HelperTrieProcessConfirmations,
 		BloomSize:         params.BloomBitsBlocks,
 		BloomConfirms:     params.BloomConfirms,
@@ -74,8 +70,7 @@ var (
 	}
 	// DefaultClientIndexerConfig wraps a set of configs as a default indexer config for client side.
 	DefaultClientIndexerConfig = &IndexerConfig{
-		ChtSize:           params.CHTFrequencyClient,
-		PairChtSize:       params.CHTFrequencyServer,
+		ChtSize:           params.CHTFrequency,
 		ChtConfirms:       params.HelperTrieConfirmations,
 		BloomSize:         params.BloomBitsBlocksClient,
 		BloomConfirms:     params.HelperTrieConfirmations,
@@ -84,8 +79,7 @@ var (
 	}
 	// TestServerIndexerConfig wraps a set of configs as a test indexer config for server side.
 	TestServerIndexerConfig = &IndexerConfig{
-		ChtSize:           64,
-		PairChtSize:       512,
+		ChtSize:           512,
 		ChtConfirms:       4,
 		BloomSize:         64,
 		BloomConfirms:     4,
@@ -95,7 +89,6 @@ var (
 	// TestClientIndexerConfig wraps a set of configs as a test indexer config for client side.
 	TestClientIndexerConfig = &IndexerConfig{
 		ChtSize:           512,
-		PairChtSize:       64,
 		ChtConfirms:       32,
 		BloomSize:         512,
 		BloomConfirms:     32,
@@ -116,7 +109,7 @@ var (
 	ErrNoTrustedCht       = errors.New("no trusted canonical hash trie")
 	ErrNoTrustedBloomTrie = errors.New("no trusted bloom trie")
 	ErrNoHeader           = errors.New("header not found")
-	chtPrefix             = []byte("chtRoot-") // chtPrefix + chtNum (uint64 big endian) -> trie root hash
+	chtPrefix             = []byte("chtRootV2-") // chtPrefix + chtNum (uint64 big endian) -> trie root hash
 	ChtTablePrefix        = "cht-"
 )
 
@@ -127,7 +120,6 @@ type ChtNode struct {
 }
 
 // GetChtRoot reads the CHT root associated to the given section from the database
-// Note that sectionIdx is specified according to LES/1 CHT section size.
 func GetChtRoot(db ethdb.Database, sectionIdx uint64, sectionHead common.Hash) common.Hash {
 	var encNumber [8]byte
 	binary.BigEndian.PutUint64(encNumber[:], sectionIdx)
@@ -136,7 +128,6 @@ func GetChtRoot(db ethdb.Database, sectionIdx uint64, sectionHead common.Hash) c
 }
 
 // StoreChtRoot writes the CHT root associated to the given section into the database
-// Note that sectionIdx is specified according to LES/1 CHT section size.
 func StoreChtRoot(db ethdb.Database, sectionIdx uint64, sectionHead, root common.Hash) {
 	var encNumber [8]byte
 	binary.BigEndian.PutUint64(encNumber[:], sectionIdx)
@@ -163,7 +154,7 @@ func NewChtIndexer(db ethdb.Database, odr OdrBackend, size, confirms uint64) *co
 		triedb:      trie.NewDatabaseWithCache(trieTable, 1), // Use a tiny cache only to keep memory down
 		sectionSize: size,
 	}
-	return core.NewChainIndexer(db, rawdb.NewTable(db, "chtIndex-"), backend, size, confirms, time.Millisecond*100, "cht")
+	return core.NewChainIndexer(db, rawdb.NewTable(db, "chtIndexV2-"), backend, size, confirms, time.Millisecond*100, "cht")
 }
 
 // fetchMissingNodes tries to retrieve the last entry of the latest trusted CHT from the
@@ -235,9 +226,7 @@ func (c *ChtIndexerBackend) Commit() error {
 	}
 	c.triedb.Commit(root, false)
 
-	if ((c.section+1)*c.sectionSize)%params.CHTFrequencyClient == 0 {
-		log.Info("Storing CHT", "section", c.section*c.sectionSize/params.CHTFrequencyClient, "head", fmt.Sprintf("%064x", c.lastHash), "root", fmt.Sprintf("%064x", root))
-	}
+	log.Info("Storing CHT", "section", c.section, "head", fmt.Sprintf("%064x", c.lastHash), "root", fmt.Sprintf("%064x", root))
 	StoreChtRoot(c.diskdb, c.section, c.lastHash, root)
 	return nil
 }
diff --git a/params/network_params.go b/params/network_params.go
index f8731e89797..024c4af457e 100644
--- a/params/network_params.go
+++ b/params/network_params.go
@@ -32,13 +32,8 @@ const (
 	// considered probably final and its rotated bits are calculated.
 	BloomConfirms = 256
 
-	// CHTFrequencyClient is the block frequency for creating CHTs on the client side.
-	CHTFrequencyClient = 32768
-
-	// CHTFrequencyServer is the block frequency for creating CHTs on the server side.
-	// Eventually this can be merged back with the client version, but that requires a
-	// full database upgrade, so that should be left for a suitable moment.
-	CHTFrequencyServer = 4096
+	// CHTFrequency is the block frequency for creating CHTs
+	CHTFrequency = 32768
 
 	// BloomTrieFrequency is the block frequency for creating BloomTrie on both
 	// server/client sides.