forked from TrueCloudLab/neoneo-go
850 lines
26 KiB
Go
850 lines
26 KiB
Go
package dao
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"sort"
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"github.com/nspcc-dev/neo-go/pkg/core/block"
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"github.com/nspcc-dev/neo-go/pkg/core/mpt"
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"github.com/nspcc-dev/neo-go/pkg/core/state"
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"github.com/nspcc-dev/neo-go/pkg/core/storage"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/util"
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)
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// DAO is a data access object.
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type DAO interface {
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AppendNEP5Transfer(acc util.Uint160, index uint32, tr *state.NEP5Transfer) (bool, error)
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AppendTransfer(acc util.Uint160, index uint32, tr *state.Transfer) (bool, error)
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DeleteContractState(hash util.Uint160) error
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DeleteStorageItem(scripthash util.Uint160, key []byte) error
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DeleteValidatorState(vs *state.Validator) error
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GetAccountState(hash util.Uint160) (*state.Account, error)
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GetAccountStateOrNew(hash util.Uint160) (*state.Account, error)
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GetAndDecode(entity io.Serializable, key []byte) error
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GetAppExecResult(hash util.Uint256) (*state.AppExecResult, error)
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GetAssetState(assetID util.Uint256) (*state.Asset, error)
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GetBatch() *storage.MemBatch
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GetBlock(hash util.Uint256) (*block.Block, uint32, error)
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GetContractState(hash util.Uint160) (*state.Contract, error)
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GetCurrentBlockHeight() (uint32, error)
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GetCurrentHeaderHeight() (i uint32, h util.Uint256, err error)
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GetCurrentStateRootHeight() (uint32, error)
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GetHeaderHashes() ([]util.Uint256, error)
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GetNEP5Balances(acc util.Uint160) (*state.NEP5Balances, error)
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GetNEP5Metadata(h util.Uint160) (*state.NEP5Metadata, error)
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GetNEP5TransferLog(acc util.Uint160, index uint32) (*state.TransferLog, error)
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GetNextTransferBatch(acc util.Uint160) (uint32, error)
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GetStateRoot(height uint32) (*state.MPTRootState, error)
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PutStateRoot(root *state.MPTRootState) error
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GetStorageItem(scripthash util.Uint160, key []byte) *state.StorageItem
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GetStorageItems(hash util.Uint160, prefix []byte) ([]StorageItemWithKey, error)
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GetTransaction(hash util.Uint256) (*transaction.Transaction, uint32, error)
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GetTransferLog(acc util.Uint160, index uint32) (*state.TransferLog, error)
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GetUnspentCoinState(hash util.Uint256) (*state.UnspentCoin, error)
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GetValidatorState(publicKey *keys.PublicKey) (*state.Validator, error)
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GetValidatorStateOrNew(publicKey *keys.PublicKey) (*state.Validator, error)
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GetValidators() []*state.Validator
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GetValidatorsCount() (*state.ValidatorsCount, error)
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GetVersion() (string, error)
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GetWrapped() DAO
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HasTransaction(hash util.Uint256) bool
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IsDoubleClaim(claim *transaction.ClaimTX) bool
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IsDoubleSpend(tx *transaction.Transaction) bool
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Persist() (int, error)
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PutAccountState(as *state.Account) error
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PutAppExecResult(aer *state.AppExecResult) error
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PutAssetState(as *state.Asset) error
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PutContractState(cs *state.Contract) error
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PutCurrentHeader(hashAndIndex []byte) error
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PutNEP5Balances(acc util.Uint160, bs *state.NEP5Balances) error
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PutNEP5Metadata(h util.Uint160, meta *state.NEP5Metadata) error
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PutNEP5TransferLog(acc util.Uint160, index uint32, lg *state.TransferLog) error
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PutNextTransferBatch(acc util.Uint160, num uint32) error
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PutStorageItem(scripthash util.Uint160, key []byte, si *state.StorageItem) error
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PutTransferLog(acc util.Uint160, index uint32, lg *state.TransferLog) error
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PutUnspentCoinState(hash util.Uint256, ucs *state.UnspentCoin) error
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PutValidatorState(vs *state.Validator) error
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PutValidatorsCount(vc *state.ValidatorsCount) error
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PutVersion(v string) error
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StoreAsBlock(block *block.Block, sysFee uint32) error
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StoreAsCurrentBlock(block *block.Block) error
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StoreAsTransaction(tx *transaction.Transaction, index uint32) error
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putAccountState(as *state.Account, buf *io.BufBinWriter) error
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putNEP5Balances(acc util.Uint160, bs *state.NEP5Balances, buf *io.BufBinWriter) error
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putUnspentCoinState(hash util.Uint256, ucs *state.UnspentCoin, buf *io.BufBinWriter) error
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}
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// Simple is memCached wrapper around DB, simple DAO implementation.
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type Simple struct {
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MPT *mpt.Trie
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Store *storage.MemCachedStore
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}
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// NewSimple creates new simple dao using provided backend store.
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func NewSimple(backend storage.Store) *Simple {
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st := storage.NewMemCachedStore(backend)
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return &Simple{Store: st}
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}
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// GetBatch returns currently accumulated DB changeset.
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func (dao *Simple) GetBatch() *storage.MemBatch {
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return dao.Store.GetBatch()
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}
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// GetWrapped returns new DAO instance with another layer of wrapped
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// MemCachedStore around the current DAO Store.
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func (dao *Simple) GetWrapped() DAO {
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d := NewSimple(dao.Store)
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d.MPT = dao.MPT
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return d
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}
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// GetAndDecode performs get operation and decoding with serializable structures.
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func (dao *Simple) GetAndDecode(entity io.Serializable, key []byte) error {
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entityBytes, err := dao.Store.Get(key)
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if err != nil {
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return err
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}
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reader := io.NewBinReaderFromBuf(entityBytes)
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entity.DecodeBinary(reader)
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return reader.Err
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}
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// Put performs put operation with serializable structures.
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func (dao *Simple) Put(entity io.Serializable, key []byte) error {
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return dao.putWithBuffer(entity, key, io.NewBufBinWriter())
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}
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// putWithBuffer performs put operation using buf as a pre-allocated buffer for serialization.
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func (dao *Simple) putWithBuffer(entity io.Serializable, key []byte, buf *io.BufBinWriter) error {
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entity.EncodeBinary(buf.BinWriter)
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if buf.Err != nil {
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return buf.Err
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}
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return dao.Store.Put(key, buf.Bytes())
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}
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// -- start accounts.
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// GetAccountStateOrNew retrieves Account from temporary or persistent Store
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// or creates a new one if it doesn't exist and persists it.
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func (dao *Simple) GetAccountStateOrNew(hash util.Uint160) (*state.Account, error) {
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account, err := dao.GetAccountState(hash)
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if err != nil {
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if err != storage.ErrKeyNotFound {
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return nil, err
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}
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account = state.NewAccount(hash)
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}
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return account, nil
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}
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// GetAccountState returns Account from the given Store if it's
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// present there. Returns nil otherwise.
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func (dao *Simple) GetAccountState(hash util.Uint160) (*state.Account, error) {
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account := &state.Account{}
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key := storage.AppendPrefix(storage.STAccount, hash.BytesBE())
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err := dao.GetAndDecode(account, key)
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if err != nil {
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return nil, err
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}
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return account, err
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}
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// PutAccountState saves given Account in given store.
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func (dao *Simple) PutAccountState(as *state.Account) error {
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return dao.putAccountState(as, io.NewBufBinWriter())
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}
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func (dao *Simple) putAccountState(as *state.Account, buf *io.BufBinWriter) error {
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key := storage.AppendPrefix(storage.STAccount, as.ScriptHash.BytesBE())
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return dao.putWithBuffer(as, key, buf)
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}
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// -- end accounts.
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// -- start assets.
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// GetAssetState returns given asset state as recorded in the given store.
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func (dao *Simple) GetAssetState(assetID util.Uint256) (*state.Asset, error) {
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asset := &state.Asset{}
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key := storage.AppendPrefix(storage.STAsset, assetID.BytesBE())
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err := dao.GetAndDecode(asset, key)
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if err != nil {
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return nil, err
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}
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if asset.ID != assetID {
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return nil, fmt.Errorf("found asset id is not equal to expected")
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}
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return asset, nil
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}
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// PutAssetState puts given asset state into the given store.
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func (dao *Simple) PutAssetState(as *state.Asset) error {
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key := storage.AppendPrefix(storage.STAsset, as.ID.BytesBE())
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return dao.Put(as, key)
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}
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// -- end assets.
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// -- start contracts.
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// GetContractState returns contract state as recorded in the given
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// store by the given script hash.
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func (dao *Simple) GetContractState(hash util.Uint160) (*state.Contract, error) {
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contract := &state.Contract{}
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key := storage.AppendPrefix(storage.STContract, hash.BytesBE())
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err := dao.GetAndDecode(contract, key)
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if err != nil {
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return nil, err
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}
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if contract.ScriptHash() != hash {
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return nil, fmt.Errorf("found script hash is not equal to expected")
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}
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return contract, nil
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}
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// PutContractState puts given contract state into the given store.
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func (dao *Simple) PutContractState(cs *state.Contract) error {
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key := storage.AppendPrefix(storage.STContract, cs.ScriptHash().BytesBE())
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return dao.Put(cs, key)
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}
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// DeleteContractState deletes given contract state in the given store.
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func (dao *Simple) DeleteContractState(hash util.Uint160) error {
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key := storage.AppendPrefix(storage.STContract, hash.BytesBE())
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return dao.Store.Delete(key)
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}
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// GetNEP5Metadata returns saved NEP5 metadata for the contract h.
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func (dao *Simple) GetNEP5Metadata(h util.Uint160) (*state.NEP5Metadata, error) {
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key := storage.AppendPrefix(storage.STMigration, h.BytesBE())
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m := new(state.NEP5Metadata)
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if err := dao.GetAndDecode(m, key); err != nil {
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return nil, err
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}
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return m, nil
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}
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// PutNEP5Metadata saves NEP5 metadata for the contract h.
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func (dao *Simple) PutNEP5Metadata(h util.Uint160, m *state.NEP5Metadata) error {
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key := storage.AppendPrefix(storage.STMigration, h.BytesBE())
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return dao.Put(m, key)
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}
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// -- end contracts.
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// -- start nep5 balances.
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// GetNEP5Balances retrieves nep5 balances from the cache.
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func (dao *Simple) GetNEP5Balances(acc util.Uint160) (*state.NEP5Balances, error) {
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key := storage.AppendPrefix(storage.STNEP5Balances, acc.BytesBE())
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bs := state.NewNEP5Balances()
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err := dao.GetAndDecode(bs, key)
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if err != nil && err != storage.ErrKeyNotFound {
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return nil, err
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}
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return bs, nil
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}
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// PutNEP5Balances saves nep5 balances from the cache.
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func (dao *Simple) PutNEP5Balances(acc util.Uint160, bs *state.NEP5Balances) error {
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return dao.putNEP5Balances(acc, bs, io.NewBufBinWriter())
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}
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func (dao *Simple) putNEP5Balances(acc util.Uint160, bs *state.NEP5Balances, buf *io.BufBinWriter) error {
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key := storage.AppendPrefix(storage.STNEP5Balances, acc.BytesBE())
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return dao.putWithBuffer(bs, key, buf)
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}
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// -- end nep5 balances.
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// -- start transfer log.
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const nep5TransferBatchSize = 128 * state.NEP5TransferSize
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const transferBatchSize = 128 * state.TransferSize
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func getTransferLogKey(acc util.Uint160, index uint32) []byte {
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key := make([]byte, 1+util.Uint160Size+4)
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key[0] = byte(storage.STTransfers)
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copy(key[1:], acc.BytesBE())
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binary.LittleEndian.PutUint32(key[util.Uint160Size:], index)
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return key
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}
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func getNEP5TransferLogKey(acc util.Uint160, index uint32) []byte {
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key := make([]byte, 1+util.Uint160Size+4)
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key[0] = byte(storage.STNEP5Transfers)
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copy(key[1:], acc.BytesBE())
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binary.LittleEndian.PutUint32(key[util.Uint160Size:], index)
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return key
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}
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// GetNextTransferBatch returns index for the transfer batch to write to.
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func (dao *Simple) GetNextTransferBatch(acc util.Uint160) (uint32, error) {
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key := storage.AppendPrefix(storage.STTransfers, acc.BytesBE())
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val, err := dao.Store.Get(key)
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if err != nil {
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if err != storage.ErrKeyNotFound {
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return 0, err
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}
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return 0, nil
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}
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return binary.LittleEndian.Uint32(val), nil
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}
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// PutNextTransferBatch sets index of the transfer batch to write to.
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func (dao *Simple) PutNextTransferBatch(acc util.Uint160, num uint32) error {
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key := storage.AppendPrefix(storage.STTransfers, acc.BytesBE())
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val := make([]byte, 4)
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binary.LittleEndian.PutUint32(val, num)
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return dao.Store.Put(key, val)
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}
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// GetTransferLog retrieves transfer log from the cache.
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func (dao *Simple) GetTransferLog(acc util.Uint160, index uint32) (*state.TransferLog, error) {
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key := getTransferLogKey(acc, index)
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value, err := dao.Store.Get(key)
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if err != nil {
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if err == storage.ErrKeyNotFound {
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return new(state.TransferLog), nil
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}
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return nil, err
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}
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return &state.TransferLog{Raw: value}, nil
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}
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// PutTransferLog saves given transfer log in the cache.
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func (dao *Simple) PutTransferLog(acc util.Uint160, index uint32, lg *state.TransferLog) error {
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key := getTransferLogKey(acc, index)
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return dao.Store.Put(key, lg.Raw)
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}
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// AppendTransfer appends a single transfer to a log.
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// First return value signalizes that log size has exceeded batch size.
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func (dao *Simple) AppendTransfer(acc util.Uint160, index uint32, tr *state.Transfer) (bool, error) {
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lg, err := dao.GetTransferLog(acc, index)
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if err != nil {
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if err != storage.ErrKeyNotFound {
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return false, err
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}
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lg = new(state.TransferLog)
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}
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if err := lg.Append(tr); err != nil {
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return false, err
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}
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return lg.Size() >= transferBatchSize, dao.PutTransferLog(acc, index, lg)
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}
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// GetNEP5TransferLog retrieves transfer log from the cache.
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func (dao *Simple) GetNEP5TransferLog(acc util.Uint160, index uint32) (*state.TransferLog, error) {
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key := getNEP5TransferLogKey(acc, index)
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value, err := dao.Store.Get(key)
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if err != nil {
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if err == storage.ErrKeyNotFound {
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return new(state.TransferLog), nil
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}
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return nil, err
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}
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return &state.TransferLog{Raw: value}, nil
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}
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// PutNEP5TransferLog saves given transfer log in the cache.
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func (dao *Simple) PutNEP5TransferLog(acc util.Uint160, index uint32, lg *state.TransferLog) error {
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key := getNEP5TransferLogKey(acc, index)
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return dao.Store.Put(key, lg.Raw)
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}
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// AppendNEP5Transfer appends a single NEP5 transfer to a log.
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// First return value signalizes that log size has exceeded batch size.
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func (dao *Simple) AppendNEP5Transfer(acc util.Uint160, index uint32, tr *state.NEP5Transfer) (bool, error) {
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lg, err := dao.GetNEP5TransferLog(acc, index)
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if err != nil {
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if err != storage.ErrKeyNotFound {
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return false, err
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}
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lg = new(state.TransferLog)
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}
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if err := lg.Append(tr); err != nil {
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return false, err
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}
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return lg.Size() >= nep5TransferBatchSize, dao.PutNEP5TransferLog(acc, index, lg)
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}
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// -- end transfer log.
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// -- start unspent coins.
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// GetUnspentCoinState retrieves UnspentCoinState from the given store.
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func (dao *Simple) GetUnspentCoinState(hash util.Uint256) (*state.UnspentCoin, error) {
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unspent := &state.UnspentCoin{}
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key := storage.AppendPrefix(storage.STCoin, hash.BytesLE())
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err := dao.GetAndDecode(unspent, key)
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if err != nil {
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return nil, err
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}
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return unspent, nil
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}
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// PutUnspentCoinState puts given UnspentCoinState into the given store.
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func (dao *Simple) PutUnspentCoinState(hash util.Uint256, ucs *state.UnspentCoin) error {
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return dao.putUnspentCoinState(hash, ucs, io.NewBufBinWriter())
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}
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func (dao *Simple) putUnspentCoinState(hash util.Uint256, ucs *state.UnspentCoin, buf *io.BufBinWriter) error {
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key := storage.AppendPrefix(storage.STCoin, hash.BytesLE())
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return dao.putWithBuffer(ucs, key, buf)
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}
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// -- end unspent coins.
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// -- start validator.
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// GetValidatorStateOrNew gets validator from store or created new one in case of error.
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func (dao *Simple) GetValidatorStateOrNew(publicKey *keys.PublicKey) (*state.Validator, error) {
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validatorState, err := dao.GetValidatorState(publicKey)
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if err != nil {
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if err != storage.ErrKeyNotFound {
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return nil, err
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}
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validatorState = &state.Validator{PublicKey: publicKey}
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}
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return validatorState, nil
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}
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// GetValidators returns all validators from store.
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func (dao *Simple) GetValidators() []*state.Validator {
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var validators []*state.Validator
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dao.Store.Seek(storage.STValidator.Bytes(), func(k, v []byte) {
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r := io.NewBinReaderFromBuf(v)
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validator := &state.Validator{}
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validator.DecodeBinary(r)
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if r.Err != nil {
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return
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}
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validators = append(validators, validator)
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})
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return validators
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}
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// GetValidatorState returns validator by publicKey.
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func (dao *Simple) GetValidatorState(publicKey *keys.PublicKey) (*state.Validator, error) {
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validatorState := &state.Validator{}
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key := storage.AppendPrefix(storage.STValidator, publicKey.Bytes())
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err := dao.GetAndDecode(validatorState, key)
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if err != nil {
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return nil, err
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}
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return validatorState, nil
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}
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// PutValidatorState puts given Validator into the given store.
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func (dao *Simple) PutValidatorState(vs *state.Validator) error {
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key := storage.AppendPrefix(storage.STValidator, vs.PublicKey.Bytes())
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return dao.Put(vs, key)
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}
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// DeleteValidatorState deletes given Validator into the given store.
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|
func (dao *Simple) DeleteValidatorState(vs *state.Validator) error {
|
|
key := storage.AppendPrefix(storage.STValidator, vs.PublicKey.Bytes())
|
|
return dao.Store.Delete(key)
|
|
}
|
|
|
|
// GetValidatorsCount returns current ValidatorsCount or new one if there is none
|
|
// in the DB.
|
|
func (dao *Simple) GetValidatorsCount() (*state.ValidatorsCount, error) {
|
|
vc := &state.ValidatorsCount{}
|
|
key := []byte{byte(storage.IXValidatorsCount)}
|
|
err := dao.GetAndDecode(vc, key)
|
|
if err != nil && err != storage.ErrKeyNotFound {
|
|
return nil, err
|
|
}
|
|
return vc, nil
|
|
}
|
|
|
|
// PutValidatorsCount put given ValidatorsCount in the store.
|
|
func (dao *Simple) PutValidatorsCount(vc *state.ValidatorsCount) error {
|
|
key := []byte{byte(storage.IXValidatorsCount)}
|
|
return dao.Put(vc, key)
|
|
}
|
|
|
|
// -- end validator.
|
|
|
|
// -- start notification event.
|
|
|
|
// GetAppExecResult gets application execution result from the
|
|
// given store.
|
|
func (dao *Simple) GetAppExecResult(hash util.Uint256) (*state.AppExecResult, error) {
|
|
aer := &state.AppExecResult{}
|
|
key := storage.AppendPrefix(storage.STNotification, hash.BytesBE())
|
|
err := dao.GetAndDecode(aer, key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return aer, nil
|
|
}
|
|
|
|
// PutAppExecResult puts given application execution result into the
|
|
// given store.
|
|
func (dao *Simple) PutAppExecResult(aer *state.AppExecResult) error {
|
|
key := storage.AppendPrefix(storage.STNotification, aer.TxHash.BytesBE())
|
|
return dao.Put(aer, key)
|
|
}
|
|
|
|
// -- end notification event.
|
|
|
|
// -- start storage item.
|
|
|
|
func makeStateRootKey(height uint32) []byte {
|
|
key := make([]byte, 5)
|
|
key[0] = byte(storage.DataMPT)
|
|
binary.LittleEndian.PutUint32(key[1:], height)
|
|
return key
|
|
}
|
|
|
|
// InitMPT initializes MPT at the given height.
|
|
func (dao *Simple) InitMPT(height uint32) error {
|
|
if height == 0 {
|
|
dao.MPT = mpt.NewTrie(nil, dao.Store)
|
|
return nil
|
|
}
|
|
r, err := dao.GetStateRoot(height)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
dao.MPT = mpt.NewTrie(mpt.NewHashNode(r.Root), dao.Store)
|
|
return nil
|
|
}
|
|
|
|
// GetCurrentStateRootHeight returns current state root height.
|
|
func (dao *Simple) GetCurrentStateRootHeight() (uint32, error) {
|
|
key := []byte{byte(storage.DataMPT)}
|
|
val, err := dao.Store.Get(key)
|
|
if err != nil {
|
|
if err == storage.ErrKeyNotFound {
|
|
err = nil
|
|
}
|
|
return 0, err
|
|
}
|
|
return binary.LittleEndian.Uint32(val), nil
|
|
}
|
|
|
|
// PutCurrentStateRootHeight updates current state root height.
|
|
func (dao *Simple) PutCurrentStateRootHeight(height uint32) error {
|
|
key := []byte{byte(storage.DataMPT)}
|
|
val := make([]byte, 4)
|
|
binary.LittleEndian.PutUint32(val, height)
|
|
return dao.Store.Put(key, val)
|
|
}
|
|
|
|
// GetStateRoot returns state root of a given height.
|
|
func (dao *Simple) GetStateRoot(height uint32) (*state.MPTRootState, error) {
|
|
r := new(state.MPTRootState)
|
|
err := dao.GetAndDecode(r, makeStateRootKey(height))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return r, nil
|
|
}
|
|
|
|
// PutStateRoot puts state root of a given height into the store.
|
|
func (dao *Simple) PutStateRoot(r *state.MPTRootState) error {
|
|
return dao.Put(r, makeStateRootKey(r.Index))
|
|
}
|
|
|
|
// GetStorageItem returns StorageItem if it exists in the given store.
|
|
func (dao *Simple) GetStorageItem(scripthash util.Uint160, key []byte) *state.StorageItem {
|
|
b, err := dao.Store.Get(makeStorageItemKey(scripthash, key))
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
r := io.NewBinReaderFromBuf(b)
|
|
|
|
si := &state.StorageItem{}
|
|
si.DecodeBinary(r)
|
|
if r.Err != nil {
|
|
return nil
|
|
}
|
|
|
|
return si
|
|
}
|
|
|
|
// PutStorageItem puts given StorageItem for given script with given
|
|
// key into the given store.
|
|
func (dao *Simple) PutStorageItem(scripthash util.Uint160, key []byte, si *state.StorageItem) error {
|
|
stKey := makeStorageItemKey(scripthash, key)
|
|
v := mpt.ToNeoStorageValue(si)
|
|
if dao.MPT != nil {
|
|
k := mpt.ToNeoStorageKey(stKey[1:]) // strip STStorage prefix
|
|
if err := dao.MPT.Put(k, v); err != nil && err != mpt.ErrNotFound {
|
|
return err
|
|
}
|
|
}
|
|
return dao.Store.Put(stKey, v[1:])
|
|
}
|
|
|
|
// DeleteStorageItem drops storage item for the given script with the
|
|
// given key from the store.
|
|
func (dao *Simple) DeleteStorageItem(scripthash util.Uint160, key []byte) error {
|
|
stKey := makeStorageItemKey(scripthash, key)
|
|
if dao.MPT != nil {
|
|
k := mpt.ToNeoStorageKey(stKey[1:]) // strip STStorage prefix
|
|
if err := dao.MPT.Delete(k); err != nil && err != mpt.ErrNotFound {
|
|
return err
|
|
}
|
|
}
|
|
return dao.Store.Delete(stKey)
|
|
}
|
|
|
|
// StorageItemWithKey is a Key-Value pair together with possible const modifier.
|
|
type StorageItemWithKey struct {
|
|
state.StorageItem
|
|
Key []byte
|
|
}
|
|
|
|
// GetStorageItems returns all storage items for a given scripthash.
|
|
func (dao *Simple) GetStorageItems(hash util.Uint160, prefix []byte) ([]StorageItemWithKey, error) {
|
|
var res []StorageItemWithKey
|
|
var err error
|
|
|
|
saveToMap := func(k, v []byte) {
|
|
if err != nil {
|
|
return
|
|
}
|
|
r := io.NewBinReaderFromBuf(v)
|
|
var s StorageItemWithKey
|
|
s.StorageItem.DecodeBinary(r)
|
|
if r.Err != nil {
|
|
err = r.Err
|
|
return
|
|
}
|
|
|
|
// Cut prefix and hash.
|
|
s.Key = k[21:]
|
|
res = append(res, s)
|
|
}
|
|
dao.Store.Seek(makeStorageItemKey(hash, prefix), saveToMap)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return res, nil
|
|
}
|
|
|
|
// makeStorageItemKey returns a key used to store StorageItem in the DB.
|
|
func makeStorageItemKey(scripthash util.Uint160, key []byte) []byte {
|
|
return storage.AppendPrefix(storage.STStorage, append(scripthash.BytesLE(), key...))
|
|
}
|
|
|
|
// -- end storage item.
|
|
|
|
// -- other.
|
|
|
|
// GetBlock returns Block by the given hash if it exists in the store.
|
|
func (dao *Simple) GetBlock(hash util.Uint256) (*block.Block, uint32, error) {
|
|
key := storage.AppendPrefix(storage.DataBlock, hash.BytesLE())
|
|
b, err := dao.Store.Get(key)
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
|
|
block, err := block.NewBlockFromTrimmedBytes(b[4:])
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
return block, binary.LittleEndian.Uint32(b[:4]), nil
|
|
}
|
|
|
|
// GetVersion attempts to get the current version stored in the
|
|
// underlying store.
|
|
func (dao *Simple) GetVersion() (string, error) {
|
|
version, err := dao.Store.Get(storage.SYSVersion.Bytes())
|
|
return string(version), err
|
|
}
|
|
|
|
// GetCurrentBlockHeight returns the current block height found in the
|
|
// underlying store.
|
|
func (dao *Simple) GetCurrentBlockHeight() (uint32, error) {
|
|
b, err := dao.Store.Get(storage.SYSCurrentBlock.Bytes())
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return binary.LittleEndian.Uint32(b[32:36]), nil
|
|
}
|
|
|
|
// GetCurrentHeaderHeight returns the current header height and hash from
|
|
// the underlying store.
|
|
func (dao *Simple) GetCurrentHeaderHeight() (i uint32, h util.Uint256, err error) {
|
|
var b []byte
|
|
b, err = dao.Store.Get(storage.SYSCurrentHeader.Bytes())
|
|
if err != nil {
|
|
return
|
|
}
|
|
i = binary.LittleEndian.Uint32(b[32:36])
|
|
h, err = util.Uint256DecodeBytesLE(b[:32])
|
|
return
|
|
}
|
|
|
|
// GetHeaderHashes returns a sorted list of header hashes retrieved from
|
|
// the given underlying store.
|
|
func (dao *Simple) GetHeaderHashes() ([]util.Uint256, error) {
|
|
hashMap := make(map[uint32][]util.Uint256)
|
|
dao.Store.Seek(storage.IXHeaderHashList.Bytes(), func(k, v []byte) {
|
|
storedCount := binary.LittleEndian.Uint32(k[1:])
|
|
hashes, err := read2000Uint256Hashes(v)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
hashMap[storedCount] = hashes
|
|
})
|
|
|
|
var (
|
|
hashes = make([]util.Uint256, 0, len(hashMap))
|
|
sortedKeys = make([]uint32, 0, len(hashMap))
|
|
)
|
|
|
|
for k := range hashMap {
|
|
sortedKeys = append(sortedKeys, k)
|
|
}
|
|
sort.Slice(sortedKeys, func(i, j int) bool { return sortedKeys[i] < sortedKeys[j] })
|
|
|
|
for _, key := range sortedKeys {
|
|
hashes = append(hashes[:key], hashMap[key]...)
|
|
}
|
|
|
|
return hashes, nil
|
|
}
|
|
|
|
// GetTransaction returns Transaction and its height by the given hash
|
|
// if it exists in the store.
|
|
func (dao *Simple) GetTransaction(hash util.Uint256) (*transaction.Transaction, uint32, error) {
|
|
key := storage.AppendPrefix(storage.DataTransaction, hash.BytesLE())
|
|
b, err := dao.Store.Get(key)
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
r := io.NewBinReaderFromBuf(b)
|
|
|
|
var height = r.ReadU32LE()
|
|
|
|
tx := &transaction.Transaction{}
|
|
tx.DecodeBinary(r)
|
|
if r.Err != nil {
|
|
return nil, 0, r.Err
|
|
}
|
|
|
|
return tx, height, nil
|
|
}
|
|
|
|
// PutVersion stores the given version in the underlying store.
|
|
func (dao *Simple) PutVersion(v string) error {
|
|
return dao.Store.Put(storage.SYSVersion.Bytes(), []byte(v))
|
|
}
|
|
|
|
// PutCurrentHeader stores current header.
|
|
func (dao *Simple) PutCurrentHeader(hashAndIndex []byte) error {
|
|
return dao.Store.Put(storage.SYSCurrentHeader.Bytes(), hashAndIndex)
|
|
}
|
|
|
|
// read2000Uint256Hashes attempts to read 2000 Uint256 hashes from
|
|
// the given byte array.
|
|
func read2000Uint256Hashes(b []byte) ([]util.Uint256, error) {
|
|
r := bytes.NewReader(b)
|
|
br := io.NewBinReaderFromIO(r)
|
|
hashes := make([]util.Uint256, 0)
|
|
br.ReadArray(&hashes)
|
|
if br.Err != nil {
|
|
return nil, br.Err
|
|
}
|
|
return hashes, nil
|
|
}
|
|
|
|
// HasTransaction returns true if the given store contains the given
|
|
// Transaction hash.
|
|
func (dao *Simple) HasTransaction(hash util.Uint256) bool {
|
|
key := storage.AppendPrefix(storage.DataTransaction, hash.BytesLE())
|
|
if _, err := dao.Store.Get(key); err == nil {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// StoreAsBlock stores the given block as DataBlock.
|
|
func (dao *Simple) StoreAsBlock(block *block.Block, sysFee uint32) error {
|
|
var (
|
|
key = storage.AppendPrefix(storage.DataBlock, block.Hash().BytesLE())
|
|
buf = io.NewBufBinWriter()
|
|
)
|
|
buf.WriteU32LE(sysFee)
|
|
b, err := block.Trim()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
buf.WriteBytes(b)
|
|
if buf.Err != nil {
|
|
return buf.Err
|
|
}
|
|
return dao.Store.Put(key, buf.Bytes())
|
|
}
|
|
|
|
// StoreAsCurrentBlock stores the given block witch prefix SYSCurrentBlock.
|
|
func (dao *Simple) StoreAsCurrentBlock(block *block.Block) error {
|
|
buf := io.NewBufBinWriter()
|
|
h := block.Hash()
|
|
h.EncodeBinary(buf.BinWriter)
|
|
buf.WriteU32LE(block.Index)
|
|
return dao.Store.Put(storage.SYSCurrentBlock.Bytes(), buf.Bytes())
|
|
}
|
|
|
|
// StoreAsTransaction stores the given TX as DataTransaction.
|
|
func (dao *Simple) StoreAsTransaction(tx *transaction.Transaction, index uint32) error {
|
|
key := storage.AppendPrefix(storage.DataTransaction, tx.Hash().BytesLE())
|
|
buf := io.NewBufBinWriter()
|
|
buf.WriteU32LE(index)
|
|
tx.EncodeBinary(buf.BinWriter)
|
|
if buf.Err != nil {
|
|
return buf.Err
|
|
}
|
|
return dao.Store.Put(key, buf.Bytes())
|
|
}
|
|
|
|
// IsDoubleSpend verifies that the input transactions are not double spent.
|
|
func (dao *Simple) IsDoubleSpend(tx *transaction.Transaction) bool {
|
|
return dao.checkUsedInputs(tx.Inputs, state.CoinSpent)
|
|
}
|
|
|
|
// IsDoubleClaim verifies that given claim inputs are not already claimed by another tx.
|
|
func (dao *Simple) IsDoubleClaim(claim *transaction.ClaimTX) bool {
|
|
return dao.checkUsedInputs(claim.Claims, state.CoinClaimed)
|
|
}
|
|
|
|
func (dao *Simple) checkUsedInputs(inputs []transaction.Input, coin state.Coin) bool {
|
|
if len(inputs) == 0 {
|
|
return false
|
|
}
|
|
for _, inputs := range transaction.GroupInputsByPrevHash(inputs) {
|
|
prevHash := inputs[0].PrevHash
|
|
unspent, err := dao.GetUnspentCoinState(prevHash)
|
|
if err != nil {
|
|
return true
|
|
}
|
|
for _, input := range inputs {
|
|
if int(input.PrevIndex) >= len(unspent.States) || (unspent.States[input.PrevIndex].State&coin) != 0 {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Persist flushes all the changes made into the (supposedly) persistent
|
|
// underlying store.
|
|
func (dao *Simple) Persist() (int, error) {
|
|
return dao.Store.Persist()
|
|
}
|