les: historical data garbage collection (#19570)

This change introduces garbage collection for the light client. Historical
chain data is deleted periodically. If you want to disable the GC, use
the --light.nopruning flag.

light/odr.go

@@ -82,7 +82,6 @@ func StorageTrieID(state *TrieID, addrHash, root common.Hash) *TrieID {
 
 // TrieRequest is the ODR request type for state/storage trie entries
 type TrieRequest struct {
-	OdrRequest
 	Id    *TrieID
 	Key   []byte
 	Proof *NodeSet
@@ -95,7 +94,6 @@ func (req *TrieRequest) StoreResult(db ethdb.Database) {
 
 // CodeRequest is the ODR request type for retrieving contract code
 type CodeRequest struct {
-	OdrRequest
 	Id   *TrieID // references storage trie of the account
 	Hash common.Hash
 	Data []byte
@@ -108,9 +106,9 @@ func (req *CodeRequest) StoreResult(db ethdb.Database) {
 
 // BlockRequest is the ODR request type for retrieving block bodies
 type BlockRequest struct {
-	OdrRequest
 	Hash   common.Hash
 	Number uint64
+	Header *types.Header
 	Rlp    []byte
 }
 
@@ -119,9 +117,8 @@ func (req *BlockRequest) StoreResult(db ethdb.Database) {
 	rawdb.WriteBodyRLP(db, req.Hash, req.Number, req.Rlp)
 }
 
-// ReceiptsRequest is the ODR request type for retrieving block bodies
+// ReceiptsRequest is the ODR request type for retrieving receipts.
 type ReceiptsRequest struct {
-	OdrRequest
 	Untrusted bool // Indicator whether the result retrieved is trusted or not
 	Hash      common.Hash
 	Number    uint64
@@ -138,7 +135,6 @@ func (req *ReceiptsRequest) StoreResult(db ethdb.Database) {
 
 // ChtRequest is the ODR request type for state/storage trie entries
 type ChtRequest struct {
-	OdrRequest
 	Untrusted        bool   // Indicator whether the result retrieved is trusted or not
 	PeerId           string // The specified peer id from which to retrieve data.
 	Config           *IndexerConfig
@@ -193,7 +189,6 @@ type TxStatus struct {
 
 // TxStatusRequest is the ODR request type for retrieving transaction status
 type TxStatusRequest struct {
-	OdrRequest
 	Hashes []common.Hash
 	Status []TxStatus
 }