130 lines
4.0 KiB
Go
130 lines
4.0 KiB
Go
package state
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import (
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"context"
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"errors"
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"fmt"
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"github.com/VictoriaMetrics/fastcache"
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lru "github.com/hashicorp/golang-lru"
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"github.com/holiman/uint256"
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"github.com/cerc-io/plugeth-statediff/indexer/ipld"
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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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util "github.com/cerc-io/ipld-eth-statedb/internal"
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"github.com/cerc-io/ipld-eth-statedb/sql"
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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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var (
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// not found error
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errNotFound = errors.New("not found")
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)
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// Database interface is a union of the subset of the geth state.Database interface required
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// to support the vm.StateDB implementation as well as methods specific to this Postgres based implementation
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type Database interface {
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ContractCode(codeHash common.Hash) ([]byte, error)
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ContractCodeSize(codeHash common.Hash) (int, error)
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StateAccount(addressHash, blockHash common.Hash) (*types.StateAccount, error)
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StorageValue(addressHash, slotHash, blockHash common.Hash) ([]byte, error)
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}
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var _ Database = &cachingDB{}
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type cachingDB struct {
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db sql.Database
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codeSizeCache *lru.Cache
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codeCache *fastcache.Cache
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}
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// NewDatabase returns a new Database implementation using the passed parameters
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func NewDatabase(db sql.Database) *cachingDB {
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csc, _ := lru.New(codeSizeCacheSize)
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return &cachingDB{
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db: db,
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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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// ContractCode satisfies Database, it returns the contract code for a given codehash
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func (sd *cachingDB) ContractCode(codeHash common.Hash) ([]byte, error) {
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if code := sd.codeCache.Get(nil, codeHash.Bytes()); len(code) > 0 {
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return code, nil
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}
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c, err := util.Keccak256ToCid(ipld.RawBinary, codeHash.Bytes())
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if err != nil {
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return nil, fmt.Errorf("cannot derive CID from provided codehash: %s", err.Error())
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}
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code := make([]byte, 0)
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if err := sd.db.QueryRow(context.Background(), GetContractCodePgStr, c.String()).Scan(&code); 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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sd.codeCache.Set(codeHash.Bytes(), code)
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sd.codeSizeCache.Add(codeHash, len(code))
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return code, nil
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}
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return nil, errNotFound
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}
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// ContractCodeSize satisfies Database, it returns the length of the code for a provided codehash
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func (sd *cachingDB) ContractCodeSize(codeHash common.Hash) (int, error) {
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if cached, ok := sd.codeSizeCache.Get(codeHash); ok {
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return cached.(int), nil
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}
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code, err := sd.ContractCode(codeHash)
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return len(code), err
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}
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// StateAccount satisfies Database, it returns the types.StateAccount for a provided address and block hash
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func (sd *cachingDB) StateAccount(addressHash, blockHash common.Hash) (*types.StateAccount, error) {
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res := StateAccountResult{}
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err := sd.db.QueryRow(context.Background(), GetStateAccount, addressHash.Hex(), blockHash.Hex()).
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Scan(&res.Balance, &res.Nonce, &res.CodeHash, &res.StorageRoot, &res.Removed)
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if err != nil {
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return nil, err
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}
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if res.Removed {
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// TODO: check expected behavior for deleted/non existing accounts
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return nil, nil
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}
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bal, err := uint256.FromDecimal(res.Balance)
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if err != nil {
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return nil, err
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}
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return &types.StateAccount{
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Nonce: res.Nonce,
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Balance: bal,
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Root: common.HexToHash(res.StorageRoot),
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CodeHash: common.HexToHash(res.CodeHash).Bytes(),
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}, nil
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}
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// StorageValue satisfies Database, it returns the RLP-encoded storage value for the provided address, slot,
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// and block hash
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func (sd *cachingDB) StorageValue(addressHash, slotHash, blockHash common.Hash) ([]byte, error) {
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res := StorageSlotResult{}
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err := sd.db.QueryRow(context.Background(), GetStorageSlot,
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addressHash.Hex(), slotHash.Hex(), blockHash.Hex()).
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Scan(&res.Value, &res.Removed, &res.StateLeafRemoved)
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if err != nil {
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return nil, err
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}
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if res.Removed || res.StateLeafRemoved {
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// TODO: check expected behavior for deleted/non existing accounts
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return nil, nil
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}
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return res.Value, nil
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}
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