129 lines
3.8 KiB
Go
129 lines
3.8 KiB
Go
package state
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import (
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"errors"
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"github.com/VictoriaMetrics/fastcache"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/statediff/indexer/ipld"
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lru "github.com/hashicorp/golang-lru"
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"github.com/cerc-io/ipld-eth-statedb/trie_by_cid/trie"
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)
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const (
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// Number of codehash->size associations to keep.
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codeSizeCacheSize = 100000
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// Cache size granted for caching clean code.
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codeCacheSize = 64 * 1024 * 1024
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)
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// Database wraps access to tries and contract code.
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type Database interface {
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// OpenTrie opens the main account trie.
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OpenTrie(root common.Hash) (Trie, error)
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// OpenStorageTrie opens the storage trie of an account.
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OpenStorageTrie(addrHash, root common.Hash) (Trie, error)
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// ContractCode retrieves a particular contract's code.
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ContractCode(codeHash common.Hash) ([]byte, error)
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// ContractCodeSize retrieves a particular contracts code's size.
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ContractCodeSize(codeHash common.Hash) (int, error)
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// TrieDB retrieves the low level trie database used for data storage.
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TrieDB() *trie.Database
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}
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// Trie is a Ethereum Merkle Patricia trie.
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type Trie interface {
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TryGet(key []byte) ([]byte, error)
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TryGetAccount(key []byte) (*types.StateAccount, error)
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Hash() common.Hash
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NodeIterator(startKey []byte) trie.NodeIterator
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Prove(key []byte, fromLevel uint, proofDb ethdb.KeyValueWriter) error
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}
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// NewDatabase creates a backing store for state. The returned database is safe for
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// concurrent use, but does not retain any recent trie nodes in memory. To keep some
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// historical state in memory, use the NewDatabaseWithConfig constructor.
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func NewDatabase(db ethdb.Database) Database {
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return NewDatabaseWithConfig(db, nil)
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}
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// NewDatabaseWithConfig creates a backing store for state. The returned database
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// is safe for concurrent use and retains a lot of collapsed RLP trie nodes in a
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// large memory cache.
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func NewDatabaseWithConfig(db ethdb.Database, config *trie.Config) Database {
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csc, _ := lru.New(codeSizeCacheSize)
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return &cachingDB{
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db: trie.NewDatabaseWithConfig(db, config),
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codeSizeCache: csc,
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codeCache: fastcache.New(codeCacheSize),
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}
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}
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type cachingDB struct {
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db *trie.Database
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codeSizeCache *lru.Cache
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codeCache *fastcache.Cache
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}
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// OpenTrie opens the main account trie at a specific root hash.
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func (db *cachingDB) OpenTrie(root common.Hash) (Trie, error) {
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tr, err := trie.NewStateTrie(common.Hash{}, root, db.db)
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if err != nil {
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return nil, err
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}
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return tr, nil
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}
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// OpenStorageTrie opens the storage trie of an account.
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func (db *cachingDB) OpenStorageTrie(addrHash, root common.Hash) (Trie, error) {
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tr, err := trie.NewStorageTrie(addrHash, root, db.db)
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if err != nil {
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return nil, err
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}
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return tr, nil
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}
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// ContractCode retrieves a particular contract's code.
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func (db *cachingDB) ContractCode(codeHash common.Hash) ([]byte, error) {
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if code := db.codeCache.Get(nil, codeHash.Bytes()); len(code) > 0 {
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return code, nil
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}
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// TODO - use non panicking
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codeCID := ipld.Keccak256ToCid(ipld.RawBinary, codeHash.Bytes())
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// if err != nil {
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// return nil, err
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// }
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code, err := db.db.DiskDB().Get(codeCID.Bytes())
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if err != nil {
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return nil, err
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}
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if len(code) > 0 {
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db.codeCache.Set(codeHash.Bytes(), code)
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db.codeSizeCache.Add(codeHash, len(code))
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return code, nil
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}
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return nil, errors.New("not found")
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}
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// ContractCodeSize retrieves a particular contracts code's size.
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func (db *cachingDB) ContractCodeSize(codeHash common.Hash) (int, error) {
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if cached, ok := db.codeSizeCache.Get(codeHash); ok {
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return cached.(int), nil
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}
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code, err := db.ContractCode(codeHash)
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return len(code), err
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}
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// TrieDB retrieves any intermediate trie-node caching layer.
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func (db *cachingDB) TrieDB() *trie.Database {
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return db.db
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}
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