les, light: add block availability check for ODR requests

2 files changed, 12 insertions, 8 deletions

diff --git a/light/odr.go b/light/odr.go
index 679569bf9..4f6ef6b9e 100644
--- a/light/odr.go
+++ b/light/odr.go
@@ -48,6 +48,7 @@ type OdrRequest interface {
 // TrieID identifies a state or account storage trie
 type TrieID struct {
 	BlockHash, Root common.Hash
+	BlockNumber     uint64
 	AccKey          []byte
 }
 
@@ -55,9 +56,10 @@ type TrieID struct {
 // header.
 func StateTrieID(header *types.Header) *TrieID {
 	return &TrieID{
-		BlockHash: header.Hash(),
-		AccKey:    nil,
-		Root:      header.Root,
+		BlockHash:   header.Hash(),
+		BlockNumber: header.Number.Uint64(),
+		AccKey:      nil,
+		Root:        header.Root,
 	}
 }
 
@@ -66,9 +68,10 @@ func StateTrieID(header *types.Header) *TrieID {
 // checking Merkle proofs.
 func StorageTrieID(state *TrieID, addr common.Address, root common.Hash) *TrieID {
 	return &TrieID{
-		BlockHash: state.BlockHash,
-		AccKey:    crypto.Keccak256(addr[:]),
-		Root:      root,
+		BlockHash:   state.BlockHash,
+		BlockNumber: state.BlockNumber,
+		AccKey:      crypto.Keccak256(addr[:]),
+		Root:        root,
 	}
 }
 
diff --git a/light/odr_util.go b/light/odr_util.go
index 5c72f90e9..761711621 100644
--- a/light/odr_util.go
+++ b/light/odr_util.go
@@ -38,8 +38,9 @@ var (
 	ErrNoTrustedCht = errors.New("No trusted canonical hash trie")
 	ErrNoHeader     = errors.New("Header not found")
 
-	ChtFrequency  = uint64(4096)
-	trustedChtKey = []byte("TrustedCHT")
+	ChtFrequency     = uint64(4096)
+	ChtConfirmations = uint64(2048)
+	trustedChtKey    = []byte("TrustedCHT")
 )
 
 type ChtNode struct {