adapted statedb implementation, trimmed down to fit only vm.StateDB interface. still need to replace ethdb usage
This commit is contained in:
i-norden
parent
fe188030df
commit
59f69ea369
605
statedb.go
605
statedb.go
@ -1,11 +1,20 @@
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package ipld_eth_statedb
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import (
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"fmt"
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"math/big"
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"sort"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/state/snapshot"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/temp/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/metrics"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/trie"
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)
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/*
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@ -30,125 +39,599 @@ The rest can be left with panics for now
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var _ vm.StateDB = &StateDB{}
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type revision struct {
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id int
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journalIndex int
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}
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var (
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// emptyRoot is the known root hash of an empty trie.
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emptyRoot = common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
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)
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// StateDB structs within the ethereum protocol are used to store anything
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// within the merkle trie. StateDBs take care of caching and storing
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// nested states. It's the general query interface to retrieve:
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// * Contracts
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// * Accounts
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type StateDB struct {
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db state.Database
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prefetcher *triePrefetcher
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trie state.Trie
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hasher crypto.KeccakState
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// originalRoot is the pre-state root, before any changes were made.
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// It will be updated when the Commit is called.
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originalRoot common.Hash
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snaps *snapshot.Tree
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snap snapshot.Snapshot
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snapDestructs map[common.Hash]struct{}
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snapAccounts map[common.Hash][]byte
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snapStorage map[common.Hash]map[common.Hash][]byte
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// This map holds 'live' objects, which will get modified while processing a state transition.
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stateObjects map[common.Address]*stateObject
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stateObjectsPending map[common.Address]struct{} // State objects finalized but not yet written to the trie
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stateObjectsDirty map[common.Address]struct{} // State objects modified in the current execution
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// DB error.
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// State objects are used by the consensus core and VM which are
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// unable to deal with database-level errors. Any error that occurs
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// during a database read is memoized here and will eventually be returned
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// by StateDB.Commit.
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dbErr error
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// The refund counter, also used by state transitioning.
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refund uint64
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thash common.Hash
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txIndex int
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logs map[common.Hash][]*types.Log
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logSize uint
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preimages map[common.Hash][]byte
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// Per-transaction access list
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accessList *accessList
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// Journal of state modifications. This is the backbone of
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// Snapshot and RevertToSnapshot.
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journal *journal
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validRevisions []revision
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nextRevisionId int
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// Measurements gathered during execution for debugging purposes
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AccountReads time.Duration
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AccountHashes time.Duration
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AccountUpdates time.Duration
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AccountCommits time.Duration
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StorageReads time.Duration
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StorageHashes time.Duration
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StorageUpdates time.Duration
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StorageCommits time.Duration
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SnapshotAccountReads time.Duration
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SnapshotStorageReads time.Duration
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SnapshotCommits time.Duration
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AccountUpdated int
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StorageUpdated int
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AccountDeleted int
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StorageDeleted int
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}
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func (s StateDB) CreateAccount(address common.Address) {
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panic("implement me")
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// New creates a new state from a given trie.
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func New(root common.Hash, db state.Database, snaps *snapshot.Tree) (*StateDB, error) {
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tr, err := db.OpenTrie(root)
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if err != nil {
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return nil, err
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}
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sdb := &StateDB{
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db: db,
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trie: tr,
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originalRoot: root,
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snaps: snaps,
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stateObjects: make(map[common.Address]*stateObject),
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stateObjectsPending: make(map[common.Address]struct{}),
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stateObjectsDirty: make(map[common.Address]struct{}),
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logs: make(map[common.Hash][]*types.Log),
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preimages: make(map[common.Hash][]byte),
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journal: newJournal(),
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accessList: newAccessList(),
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hasher: crypto.NewKeccakState(),
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}
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if sdb.snaps != nil {
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if sdb.snap = sdb.snaps.Snapshot(root); sdb.snap != nil {
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sdb.snapDestructs = make(map[common.Hash]struct{})
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sdb.snapAccounts = make(map[common.Hash][]byte)
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sdb.snapStorage = make(map[common.Hash]map[common.Hash][]byte)
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}
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}
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return sdb, nil
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}
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func (s StateDB) SubBalance(address common.Address, b *big.Int) {
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panic("implement me")
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// setError remembers the first non-nil error it is called with.
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func (s *StateDB) setError(err error) {
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if s.dbErr == nil {
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s.dbErr = err
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}
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}
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func (s StateDB) AddBalance(address common.Address, b *big.Int) {
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panic("implement me")
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func (s *StateDB) AddLog(log *types.Log) {
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s.journal.append(addLogChange{txhash: s.thash})
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log.TxHash = s.thash
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log.TxIndex = uint(s.txIndex)
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log.Index = s.logSize
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s.logs[s.thash] = append(s.logs[s.thash], log)
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s.logSize++
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}
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func (s StateDB) GetBalance(address common.Address) *big.Int {
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panic("implement me")
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// AddPreimage records a SHA3 preimage seen by the VM.
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func (s *StateDB) AddPreimage(hash common.Hash, preimage []byte) {
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if _, ok := s.preimages[hash]; !ok {
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s.journal.append(addPreimageChange{hash: hash})
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pi := make([]byte, len(preimage))
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copy(pi, preimage)
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s.preimages[hash] = pi
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}
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}
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func (s StateDB) GetNonce(address common.Address) uint64 {
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panic("implement me")
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// AddRefund adds gas to the refund counter
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func (s *StateDB) AddRefund(gas uint64) {
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s.journal.append(refundChange{prev: s.refund})
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s.refund += gas
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}
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func (s StateDB) SetNonce(address common.Address, u uint64) {
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panic("implement me")
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// SubRefund removes gas from the refund counter.
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// This method will panic if the refund counter goes below zero
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func (s *StateDB) SubRefund(gas uint64) {
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s.journal.append(refundChange{prev: s.refund})
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if gas > s.refund {
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panic(fmt.Sprintf("Refund counter below zero (gas: %d > refund: %d)", gas, s.refund))
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}
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s.refund -= gas
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}
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func (s StateDB) GetCodeHash(address common.Address) common.Hash {
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panic("implement me")
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// Exist reports whether the given account address exists in the state.
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// Notably this also returns true for suicided accounts.
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func (s *StateDB) Exist(addr common.Address) bool {
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return s.getStateObject(addr) != nil
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}
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func (s StateDB) GetCode(address common.Address) []byte {
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panic("implement me")
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// Empty returns whether the state object is either non-existent
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// or empty according to the EIP161 specification (balance = nonce = code = 0)
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func (s *StateDB) Empty(addr common.Address) bool {
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so := s.getStateObject(addr)
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return so == nil || so.empty()
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}
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func (s StateDB) SetCode(address common.Address, bytes []byte) {
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panic("implement me")
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// GetBalance retrieves the balance from the given address or 0 if object not found
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func (s *StateDB) GetBalance(addr common.Address) *big.Int {
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stateObject := s.getStateObject(addr)
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if stateObject != nil {
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return stateObject.Balance()
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}
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return common.Big0
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}
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func (s StateDB) GetCodeSize(address common.Address) int {
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panic("implement me")
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func (s *StateDB) GetNonce(addr common.Address) uint64 {
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stateObject := s.getStateObject(addr)
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if stateObject != nil {
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return stateObject.Nonce()
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}
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func (s StateDB) AddRefund(u uint64) {
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panic("implement me")
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return 0
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}
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func (s StateDB) SubRefund(u uint64) {
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panic("implement me")
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func (s *StateDB) GetCode(addr common.Address) []byte {
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stateObject := s.getStateObject(addr)
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if stateObject != nil {
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return stateObject.Code(s.db)
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}
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return nil
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}
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func (s StateDB) GetRefund() uint64 {
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panic("implement me")
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func (s *StateDB) GetCodeSize(addr common.Address) int {
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stateObject := s.getStateObject(addr)
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if stateObject != nil {
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return stateObject.CodeSize(s.db)
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}
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return 0
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}
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func (s StateDB) GetCommittedState(address common.Address, hash common.Hash) common.Hash {
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panic("implement me")
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func (s *StateDB) GetCodeHash(addr common.Address) common.Hash {
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stateObject := s.getStateObject(addr)
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if stateObject == nil {
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return common.Hash{}
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}
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return common.BytesToHash(stateObject.CodeHash())
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}
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func (s StateDB) GetState(address common.Address, hash common.Hash) common.Hash {
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panic("implement me")
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// GetState retrieves a value from the given account's storage trie.
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func (s *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash {
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stateObject := s.getStateObject(addr)
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if stateObject != nil {
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return stateObject.GetState(s.db, hash)
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}
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return common.Hash{}
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}
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func (s StateDB) SetState(address common.Address, hash common.Hash, hash2 common.Hash) {
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panic("implement me")
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// GetCommittedState retrieves a value from the given account's committed storage trie.
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func (s *StateDB) GetCommittedState(addr common.Address, hash common.Hash) common.Hash {
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stateObject := s.getStateObject(addr)
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if stateObject != nil {
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return stateObject.GetCommittedState(s.db, hash)
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}
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return common.Hash{}
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}
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func (s StateDB) Suicide(address common.Address) bool {
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panic("implement me")
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func (s *StateDB) HasSuicided(addr common.Address) bool {
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stateObject := s.getStateObject(addr)
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if stateObject != nil {
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return stateObject.suicided
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}
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return false
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}
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func (s StateDB) HasSuicided(address common.Address) bool {
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panic("implement me")
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/*
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* SETTERS
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*/
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// AddBalance adds amount to the account associated with addr.
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func (s *StateDB) AddBalance(addr common.Address, amount *big.Int) {
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stateObject := s.getOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.AddBalance(amount)
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}
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}
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func (s StateDB) Exist(address common.Address) bool {
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panic("implement me")
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// SubBalance subtracts amount from the account associated with addr.
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func (s *StateDB) SubBalance(addr common.Address, amount *big.Int) {
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stateObject := s.getOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.SubBalance(amount)
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}
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}
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func (s StateDB) Empty(address common.Address) bool {
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panic("implement me")
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func (s *StateDB) SetBalance(addr common.Address, amount *big.Int) {
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stateObject := s.getOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.SetBalance(amount)
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}
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}
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func (s StateDB) PrepareAccessList(sender common.Address, dest *common.Address, precompiles []common.Address, txAccesses types.AccessList) {
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panic("implement me")
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func (s *StateDB) SetNonce(addr common.Address, nonce uint64) {
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stateObject := s.getOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.SetNonce(nonce)
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}
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}
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func (s StateDB) AddressInAccessList(addr common.Address) bool {
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panic("implement me")
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func (s *StateDB) SetCode(addr common.Address, code []byte) {
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stateObject := s.getOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.SetCode(crypto.Keccak256Hash(code), code)
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}
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}
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func (s StateDB) SlotInAccessList(addr common.Address, slot common.Hash) (addressOk bool, slotOk bool) {
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panic("implement me")
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func (s *StateDB) SetState(addr common.Address, key, value common.Hash) {
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stateObject := s.getOrNewStateObject(addr)
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if stateObject != nil {
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stateObject.SetState(s.db, key, value)
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}
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}
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func (s StateDB) AddAddressToAccessList(addr common.Address) {
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panic("implement me")
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// Suicide marks the given account as suicided.
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// This clears the account balance.
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//
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// The account's state object is still available until the state is committed,
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// getStateObject will return a non-nil account after Suicide.
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func (s *StateDB) Suicide(addr common.Address) bool {
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stateObject := s.getStateObject(addr)
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if stateObject == nil {
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return false
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}
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s.journal.append(suicideChange{
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account: &addr,
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prev: stateObject.suicided,
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prevbalance: new(big.Int).Set(stateObject.Balance()),
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})
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stateObject.markSuicided()
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stateObject.data.Balance = new(big.Int)
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return true
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}
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func (s StateDB) AddSlotToAccessList(addr common.Address, slot common.Hash) {
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panic("implement me")
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//
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// Setting, updating & deleting state object methods.
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//
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// updateStateObject writes the given object to the trie.
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// TODO:
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func (s *StateDB) updateStateObject(obj *stateObject) {
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// Track the amount of time wasted on updating the account from the trie
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if metrics.EnabledExpensive {
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defer func(start time.Time) { s.AccountUpdates += time.Since(start) }(time.Now())
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}
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// Encode the account and update the account trie
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addr := obj.Address()
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if err := s.trie.TryUpdateAccount(addr[:], &obj.data); err != nil {
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s.setError(fmt.Errorf("updateStateObject (%x) error: %v", addr[:], err))
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}
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func (s StateDB) RevertToSnapshot(i int) {
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panic("implement me")
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// If state snapshotting is active, cache the data til commit. Note, this
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// update mechanism is not symmetric to the deletion, because whereas it is
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// enough to track account updates at commit time, deletions need tracking
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// at transaction boundary level to ensure we capture state clearing.
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if s.snap != nil {
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s.snapAccounts[obj.addrHash] = snapshot.SlimAccountRLP(obj.data.Nonce, obj.data.Balance, obj.data.Root, obj.data.CodeHash)
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}
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}
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func (s StateDB) Snapshot() int {
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panic("implement me")
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// deleteStateObject removes the given object from the state trie.
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// TODO:
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func (s *StateDB) deleteStateObject(obj *stateObject) {
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// Track the amount of time wasted on deleting the account from the trie
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if metrics.EnabledExpensive {
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defer func(start time.Time) { s.AccountUpdates += time.Since(start) }(time.Now())
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}
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// Delete the account from the trie
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addr := obj.Address()
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if err := s.trie.TryDeleteAccount(addr[:]); err != nil {
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s.setError(fmt.Errorf("deleteStateObject (%x) error: %v", addr[:], err))
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}
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}
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func (s StateDB) AddLog(log *types.Log) {
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panic("implement me")
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// getStateObject retrieves a state object given by the address, returning nil if
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// the object is not found or was deleted in this execution context. If you need
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// to differentiate between non-existent/just-deleted, use getDeletedStateObject.
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func (s *StateDB) getStateObject(addr common.Address) *stateObject {
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if obj := s.getDeletedStateObject(addr); obj != nil && !obj.deleted {
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return obj
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}
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return nil
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}
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func (s StateDB) AddPreimage(hash common.Hash, bytes []byte) {
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panic("implement me")
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// getDeletedStateObject is similar to getStateObject, but instead of returning
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// nil for a deleted state object, it returns the actual object with the deleted
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// flag set. This is needed by the state journal to revert to the correct s-
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// destructed object instead of wiping all knowledge about the state object.
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// TODO:
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func (s *StateDB) getDeletedStateObject(addr common.Address) *stateObject {
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// Prefer live objects if any is available
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if obj := s.stateObjects[addr]; obj != nil {
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return obj
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}
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// If no live objects are available, attempt to use snapshots
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var data *types.StateAccount
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if s.snap != nil {
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start := time.Now()
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acc, err := s.snap.Account(crypto.HashData(s.hasher, addr.Bytes()))
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if metrics.EnabledExpensive {
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s.SnapshotAccountReads += time.Since(start)
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}
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if err == nil {
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if acc == nil {
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return nil
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}
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data = &types.StateAccount{
|
||||
Nonce: acc.Nonce,
|
||||
Balance: acc.Balance,
|
||||
CodeHash: acc.CodeHash,
|
||||
Root: common.BytesToHash(acc.Root),
|
||||
}
|
||||
if len(data.CodeHash) == 0 {
|
||||
data.CodeHash = emptyCodeHash
|
||||
}
|
||||
if data.Root == (common.Hash{}) {
|
||||
data.Root = emptyRoot
|
||||
}
|
||||
}
|
||||
}
|
||||
// If snapshot unavailable or reading from it failed, load from the database
|
||||
if data == nil {
|
||||
start := time.Now()
|
||||
var err error
|
||||
data, err = s.trie.TryGetAccount(addr.Bytes())
|
||||
if metrics.EnabledExpensive {
|
||||
s.AccountReads += time.Since(start)
|
||||
}
|
||||
if err != nil {
|
||||
s.setError(fmt.Errorf("getDeleteStateObject (%x) error: %w", addr.Bytes(), err))
|
||||
return nil
|
||||
}
|
||||
if data == nil {
|
||||
return nil
|
||||
}
|
||||
}
|
||||
// Insert into the live set
|
||||
obj := newObject(s, addr, *data)
|
||||
s.setStateObject(obj)
|
||||
return obj
|
||||
}
|
||||
|
||||
func (s StateDB) ForEachStorage(address common.Address, f func(common.Hash, common.Hash) bool) error {
|
||||
panic("implement me")
|
||||
func (s *StateDB) setStateObject(object *stateObject) {
|
||||
s.stateObjects[object.Address()] = object
|
||||
}
|
||||
|
||||
// getOrNewStateObject retrieves a state object or create a new state object if nil.
|
||||
func (s *StateDB) getOrNewStateObject(addr common.Address) *stateObject {
|
||||
stateObject := s.getStateObject(addr)
|
||||
if stateObject == nil {
|
||||
stateObject, _ = s.createObject(addr)
|
||||
}
|
||||
return stateObject
|
||||
}
|
||||
|
||||
// createObject creates a new state object. If there is an existing account with
|
||||
// the given address, it is overwritten and returned as the second return value.
|
||||
func (s *StateDB) createObject(addr common.Address) (newobj, prev *stateObject) {
|
||||
prev = s.getDeletedStateObject(addr) // Note, prev might have been deleted, we need that!
|
||||
|
||||
var prevdestruct bool
|
||||
if s.snap != nil && prev != nil {
|
||||
_, prevdestruct = s.snapDestructs[prev.addrHash]
|
||||
if !prevdestruct {
|
||||
s.snapDestructs[prev.addrHash] = struct{}{}
|
||||
}
|
||||
}
|
||||
newobj = newObject(s, addr, types.StateAccount{})
|
||||
if prev == nil {
|
||||
s.journal.append(createObjectChange{account: &addr})
|
||||
} else {
|
||||
s.journal.append(resetObjectChange{prev: prev, prevdestruct: prevdestruct})
|
||||
}
|
||||
s.setStateObject(newobj)
|
||||
if prev != nil && !prev.deleted {
|
||||
return newobj, prev
|
||||
}
|
||||
return newobj, nil
|
||||
}
|
||||
|
||||
// CreateAccount explicitly creates a state object. If a state object with the address
|
||||
// already exists the balance is carried over to the new account.
|
||||
//
|
||||
// CreateAccount is called during the EVM CREATE operation. The situation might arise that
|
||||
// a contract does the following:
|
||||
//
|
||||
// 1. sends funds to sha(account ++ (nonce + 1))
|
||||
// 2. tx_create(sha(account ++ nonce)) (note that this gets the address of 1)
|
||||
//
|
||||
// Carrying over the balance ensures that Ether doesn't disappear.
|
||||
func (s *StateDB) CreateAccount(addr common.Address) {
|
||||
newObj, prev := s.createObject(addr)
|
||||
if prev != nil {
|
||||
newObj.setBalance(prev.data.Balance)
|
||||
}
|
||||
}
|
||||
|
||||
func (db *StateDB) ForEachStorage(addr common.Address, cb func(key, value common.Hash) bool) error {
|
||||
so := db.getStateObject(addr)
|
||||
if so == nil {
|
||||
return nil
|
||||
}
|
||||
it := trie.NewIterator(so.getTrie(db.db).NodeIterator(nil))
|
||||
|
||||
for it.Next() {
|
||||
key := common.BytesToHash(db.trie.GetKey(it.Key))
|
||||
if value, dirty := so.dirtyStorage[key]; dirty {
|
||||
if !cb(key, value) {
|
||||
return nil
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
if len(it.Value) > 0 {
|
||||
_, content, _, err := rlp.Split(it.Value)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if !cb(key, common.BytesToHash(content)) {
|
||||
return nil
|
||||
}
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Snapshot returns an identifier for the current revision of the state.
|
||||
func (s *StateDB) Snapshot() int {
|
||||
id := s.nextRevisionId
|
||||
s.nextRevisionId++
|
||||
s.validRevisions = append(s.validRevisions, revision{id, s.journal.length()})
|
||||
return id
|
||||
}
|
||||
|
||||
// RevertToSnapshot reverts all state changes made since the given revision.
|
||||
func (s *StateDB) RevertToSnapshot(revid int) {
|
||||
// Find the snapshot in the stack of valid snapshots.
|
||||
idx := sort.Search(len(s.validRevisions), func(i int) bool {
|
||||
return s.validRevisions[i].id >= revid
|
||||
})
|
||||
if idx == len(s.validRevisions) || s.validRevisions[idx].id != revid {
|
||||
panic(fmt.Errorf("revision id %v cannot be reverted", revid))
|
||||
}
|
||||
snapshot := s.validRevisions[idx].journalIndex
|
||||
|
||||
// Replay the journal to undo changes and remove invalidated snapshots
|
||||
s.journal.revert(s, snapshot)
|
||||
s.validRevisions = s.validRevisions[:idx]
|
||||
}
|
||||
|
||||
// GetRefund returns the current value of the refund counter.
|
||||
func (s *StateDB) GetRefund() uint64 {
|
||||
return s.refund
|
||||
}
|
||||
|
||||
func (s *StateDB) clearJournalAndRefund() {
|
||||
if len(s.journal.entries) > 0 {
|
||||
s.journal = newJournal()
|
||||
s.refund = 0
|
||||
}
|
||||
s.validRevisions = s.validRevisions[:0] // Snapshots can be created without journal entries
|
||||
}
|
||||
|
||||
// PrepareAccessList handles the preparatory steps for executing a state transition with
|
||||
// regards to both EIP-2929 and EIP-2930:
|
||||
//
|
||||
// - Add sender to access list (2929)
|
||||
// - Add destination to access list (2929)
|
||||
// - Add precompiles to access list (2929)
|
||||
// - Add the contents of the optional tx access list (2930)
|
||||
//
|
||||
// This method should only be called if Berlin/2929+2930 is applicable at the current number.
|
||||
func (s *StateDB) PrepareAccessList(sender common.Address, dst *common.Address, precompiles []common.Address, list types.AccessList) {
|
||||
// Clear out any leftover from previous executions
|
||||
s.accessList = newAccessList()
|
||||
|
||||
s.AddAddressToAccessList(sender)
|
||||
if dst != nil {
|
||||
s.AddAddressToAccessList(*dst)
|
||||
// If it's a create-tx, the destination will be added inside evm.create
|
||||
}
|
||||
for _, addr := range precompiles {
|
||||
s.AddAddressToAccessList(addr)
|
||||
}
|
||||
for _, el := range list {
|
||||
s.AddAddressToAccessList(el.Address)
|
||||
for _, key := range el.StorageKeys {
|
||||
s.AddSlotToAccessList(el.Address, key)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// AddAddressToAccessList adds the given address to the access list
|
||||
func (s *StateDB) AddAddressToAccessList(addr common.Address) {
|
||||
if s.accessList.AddAddress(addr) {
|
||||
s.journal.append(accessListAddAccountChange{&addr})
|
||||
}
|
||||
}
|
||||
|
||||
// AddSlotToAccessList adds the given (address, slot)-tuple to the access list
|
||||
func (s *StateDB) AddSlotToAccessList(addr common.Address, slot common.Hash) {
|
||||
addrMod, slotMod := s.accessList.AddSlot(addr, slot)
|
||||
if addrMod {
|
||||
// In practice, this should not happen, since there is no way to enter the
|
||||
// scope of 'address' without having the 'address' become already added
|
||||
// to the access list (via call-variant, create, etc).
|
||||
// Better safe than sorry, though
|
||||
s.journal.append(accessListAddAccountChange{&addr})
|
||||
}
|
||||
if slotMod {
|
||||
s.journal.append(accessListAddSlotChange{
|
||||
address: &addr,
|
||||
slot: &slot,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
// AddressInAccessList returns true if the given address is in the access list.
|
||||
func (s *StateDB) AddressInAccessList(addr common.Address) bool {
|
||||
return s.accessList.ContainsAddress(addr)
|
||||
}
|
||||
|
||||
// SlotInAccessList returns true if the given (address, slot)-tuple is in the access list.
|
||||
func (s *StateDB) SlotInAccessList(addr common.Address, slot common.Hash) (addressPresent bool, slotPresent bool) {
|
||||
return s.accessList.Contains(addr, slot)
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user