core: drop legacy receipt types (#26225)

This PR drops the legacy receipt types, the freezer-migrate command and the startup check. The previous attempt #22852 at this failed because there were users who still had legacy receipts in their db, so it had to be reverted #23247. Since then we added a command to migrate legacy dbs #24028.

As of the last hardforks all users either must have done the migration, or used the --ignore-legacy-receipts flag which will stop working now.

core/rawdb/accessors_chain.go

@@ -669,10 +669,11 @@ func DeleteReceipts(db ethdb.KeyValueWriter, hash common.Hash, number uint64) {
 
 // storedReceiptRLP is the storage encoding of a receipt.
 // Re-definition in core/types/receipt.go.
+// TODO: Re-use the existing definition.
 type storedReceiptRLP struct {
 	PostStateOrStatus []byte
 	CumulativeGasUsed uint64
-	Logs              []*types.LogForStorage
+	Logs              []*types.Log
 }
 
 // ReceiptLogs is a barebone version of ReceiptForStorage which only keeps
@@ -688,10 +689,7 @@ func (r *receiptLogs) DecodeRLP(s *rlp.Stream) error {
 	if err := s.Decode(&stored); err != nil {
 		return err
 	}
-	r.Logs = make([]*types.Log, len(stored.Logs))
-	for i, log := range stored.Logs {
-		r.Logs[i] = (*types.Log)(log)
-	}
+	r.Logs = stored.Logs
 	return nil
 }
 
@@ -727,11 +725,6 @@ func ReadLogs(db ethdb.Reader, hash common.Hash, number uint64, config *params.C
 	}
 	receipts := []*receiptLogs{}
 	if err := rlp.DecodeBytes(data, &receipts); err != nil {
-		// Receipts might be in the legacy format, try decoding that.
-		// TODO: to be removed after users migrated
-		if logs := readLegacyLogs(db, hash, number, config); logs != nil {
-			return logs
-		}
 		log.Error("Invalid receipt array RLP", "hash", hash, "err", err)
 		return nil
 	}
@@ -752,21 +745,6 @@ func ReadLogs(db ethdb.Reader, hash common.Hash, number uint64, config *params.C
 	return logs
 }
 
-// readLegacyLogs is a temporary workaround for when trying to read logs
-// from a block which has its receipt stored in the legacy format. It'll
-// be removed after users have migrated their freezer databases.
-func readLegacyLogs(db ethdb.Reader, hash common.Hash, number uint64, config *params.ChainConfig) [][]*types.Log {
-	receipts := ReadReceipts(db, hash, number, config)
-	if receipts == nil {
-		return nil
-	}
-	logs := make([][]*types.Log, len(receipts))
-	for i, receipt := range receipts {
-		logs[i] = receipt.Logs
-	}
-	return logs
-}
-
 // ReadBlock retrieves an entire block corresponding to the hash, assembling it
 // back from the stored header and body. If either the header or body could not
 // be retrieved nil is returned.