les, light: LES/2 protocol version (#14970)

This PR implements the new LES protocol version extensions:

* new and more efficient Merkle proofs reply format (when replying to
  a multiple Merkle proofs request, we just send a single set of trie
  nodes containing all necessary nodes)
* BBT (BloomBitsTrie) works similarly to the existing CHT and contains
  the bloombits search data to speed up log searches
* GetTxStatusMsg returns the inclusion position or the
  pending/queued/unknown state of a transaction referenced by hash
* an optional signature of new block data (number/hash/td) can be
  included in AnnounceMsg to provide an option for "very light
  clients" (mobile/embedded devices) to skip expensive Ethash check
  and accept multiple signatures of somewhat trusted servers (still a
  lot better than trusting a single server completely and retrieving
  everything through RPC). The new client mode is not implemented in
  this PR, just the protocol extension.

1 files changed, 3 insertions, 1 deletions

diff --git a/core/chain_indexer_test.go b/core/chain_indexer_test.go
index b761e8a5b..d685d3f8d 100644
--- a/core/chain_indexer_test.go
+++ b/core/chain_indexer_test.go
@@ -23,6 +23,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 )
@@ -208,9 +209,10 @@ func (b *testChainIndexBackend) reorg(headNum uint64) uint64 {
 	return b.stored * b.indexer.sectionSize
 }
 
-func (b *testChainIndexBackend) Reset(section uint64) {
+func (b *testChainIndexBackend) Reset(section uint64, lastSectionHead common.Hash) error {
 	b.section = section
 	b.headerCnt = 0
+	return nil
 }
 
 func (b *testChainIndexBackend) Process(header *types.Header) {