2019-11-25 17:39:11 +00:00
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package core
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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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2020-03-03 14:21:42 +00:00
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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/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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2019-11-25 17:39:11 +00:00
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)
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// dao is a data access object.
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type dao struct {
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store *storage.MemCachedStore
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}
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2019-12-12 18:04:55 +00:00
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func newDao(backend storage.Store) *dao {
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return &dao{store: storage.NewMemCachedStore(backend)}
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}
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2019-11-25 17:39:11 +00:00
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// GetAndDecode performs get operation and decoding with serializable structures.
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func (dao *dao) 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 *dao) Put(entity io.Serializable, key []byte) error {
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buf := io.NewBufBinWriter()
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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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2019-11-28 16:06:09 +00:00
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// GetAccountStateOrNew retrieves Account from temporary or persistent Store
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2019-11-25 17:39:11 +00:00
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// or creates a new one if it doesn't exist and persists it.
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2019-11-28 16:06:09 +00:00
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func (dao *dao) GetAccountStateOrNew(hash util.Uint160) (*state.Account, error) {
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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account = state.NewAccount(hash)
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2019-11-25 17:39:11 +00:00
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}
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return account, nil
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}
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2019-11-28 16:06:09 +00:00
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// GetAccountState returns Account from the given Store if it's
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2019-11-25 17:39:11 +00:00
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// present there. Returns nil otherwise.
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2019-11-28 16:06:09 +00:00
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func (dao *dao) GetAccountState(hash util.Uint160) (*state.Account, error) {
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account := &state.Account{}
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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func (dao *dao) PutAccountState(as *state.Account) error {
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2019-11-25 17:39:11 +00:00
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key := storage.AppendPrefix(storage.STAccount, as.ScriptHash.BytesBE())
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return dao.Put(as, key)
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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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2019-11-28 16:06:09 +00:00
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func (dao *dao) GetAssetState(assetID util.Uint256) (*state.Asset, error) {
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asset := &state.Asset{}
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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func (dao *dao) PutAssetState(as *state.Asset) error {
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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func (dao *dao) GetContractState(hash util.Uint160) (*state.Contract, error) {
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contract := &state.Contract{}
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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func (dao *dao) PutContractState(cs *state.Contract) error {
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2019-11-25 17:39:11 +00:00
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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 *dao) 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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// -- end contracts.
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// -- start unspent coins.
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// GetUnspentCoinStateOrNew gets UnspentCoinState from temporary or persistent Store
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// and return it. If it's not present in both stores, returns a new
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// UnspentCoinState.
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func (dao *dao) GetUnspentCoinStateOrNew(hash util.Uint256) (*UnspentCoinState, error) {
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unspent, err := dao.GetUnspentCoinState(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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unspent = &UnspentCoinState{
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2019-11-28 16:06:09 +00:00
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states: []state.Coin{},
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2019-11-25 17:39:11 +00:00
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}
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}
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return unspent, nil
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}
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// GetUnspentCoinState retrieves UnspentCoinState from the given store.
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func (dao *dao) GetUnspentCoinState(hash util.Uint256) (*UnspentCoinState, error) {
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unspent := &UnspentCoinState{}
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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 *dao) PutUnspentCoinState(hash util.Uint256, ucs *UnspentCoinState) error {
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key := storage.AppendPrefix(storage.STCoin, hash.BytesLE())
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return dao.Put(ucs, key)
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}
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// -- end unspent coins.
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// -- start spent coins.
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// GetSpentCoinsOrNew returns spent coins from store.
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2020-02-24 16:05:55 +00:00
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func (dao *dao) GetSpentCoinsOrNew(hash util.Uint256, height uint32) (*SpentCoinState, error) {
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2019-11-25 17:39:11 +00:00
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spent, err := dao.GetSpentCoinState(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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2020-02-24 16:05:55 +00:00
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spent = NewSpentCoinState(hash, height)
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2019-11-25 17:39:11 +00:00
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}
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return spent, nil
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}
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// GetSpentCoinState gets SpentCoinState from the given store.
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func (dao *dao) GetSpentCoinState(hash util.Uint256) (*SpentCoinState, error) {
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spent := &SpentCoinState{}
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key := storage.AppendPrefix(storage.STSpentCoin, hash.BytesLE())
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err := dao.GetAndDecode(spent, key)
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if err != nil {
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return nil, err
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}
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return spent, nil
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}
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// PutSpentCoinState puts given SpentCoinState into the given store.
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func (dao *dao) PutSpentCoinState(hash util.Uint256, scs *SpentCoinState) error {
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key := storage.AppendPrefix(storage.STSpentCoin, hash.BytesLE())
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return dao.Put(scs, key)
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}
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// DeleteSpentCoinState deletes given SpentCoinState from the given store.
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func (dao *dao) DeleteSpentCoinState(hash util.Uint256) error {
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key := storage.AppendPrefix(storage.STSpentCoin, hash.BytesLE())
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return dao.store.Delete(key)
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}
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// -- end spent 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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2019-11-28 16:06:09 +00:00
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func (dao *dao) GetValidatorStateOrNew(publicKey *keys.PublicKey) (*state.Validator, error) {
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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validatorState = &state.Validator{PublicKey: publicKey}
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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func (dao *dao) GetValidators() []*state.Validator {
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var validators []*state.Validator
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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validator := &state.Validator{}
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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func (dao *dao) GetValidatorState(publicKey *keys.PublicKey) (*state.Validator, error) {
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validatorState := &state.Validator{}
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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// PutValidatorState puts given Validator into the given store.
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func (dao *dao) PutValidatorState(vs *state.Validator) error {
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2019-11-25 17:39:11 +00:00
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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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2019-11-28 16:06:09 +00:00
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// DeleteValidatorState deletes given Validator into the given store.
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func (dao *dao) DeleteValidatorState(vs *state.Validator) error {
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2019-11-25 17:39:11 +00:00
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key := storage.AppendPrefix(storage.STValidator, vs.PublicKey.Bytes())
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return dao.store.Delete(key)
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}
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2020-02-12 17:54:48 +00:00
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// GetValidatorsCount returns current ValidatorsCount or new one if there is none
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// in the DB.
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func (dao *dao) GetValidatorsCount() (*state.ValidatorsCount, error) {
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vc := &state.ValidatorsCount{}
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key := []byte{byte(storage.IXValidatorsCount)}
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err := dao.GetAndDecode(vc, 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 vc, nil
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}
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// PutValidatorsCount put given ValidatorsCount in the store.
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func (dao *dao) PutValidatorsCount(vc *state.ValidatorsCount) error {
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key := []byte{byte(storage.IXValidatorsCount)}
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return dao.Put(vc, key)
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}
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2019-11-25 17:39:11 +00:00
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// -- end validator.
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// -- start notification event.
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// GetAppExecResult gets application execution result from the
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// given store.
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2019-11-28 16:06:09 +00:00
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func (dao *dao) GetAppExecResult(hash util.Uint256) (*state.AppExecResult, error) {
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aer := &state.AppExecResult{}
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2019-11-25 17:39:11 +00:00
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key := storage.AppendPrefix(storage.STNotification, hash.BytesBE())
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err := dao.GetAndDecode(aer, key)
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if err != nil {
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return nil, err
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}
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return aer, nil
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}
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// PutAppExecResult puts given application execution result into the
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// given store.
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2019-11-28 16:06:09 +00:00
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func (dao *dao) PutAppExecResult(aer *state.AppExecResult) error {
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2019-11-25 17:39:11 +00:00
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key := storage.AppendPrefix(storage.STNotification, aer.TxHash.BytesBE())
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return dao.Put(aer, key)
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}
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// -- end notification event.
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// -- start storage item.
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// GetStorageItem returns StorageItem if it exists in the given Store.
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2019-11-28 16:06:09 +00:00
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func (dao *dao) GetStorageItem(scripthash util.Uint160, key []byte) *state.StorageItem {
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2019-11-25 17:39:11 +00:00
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b, err := dao.store.Get(makeStorageItemKey(scripthash, key))
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if err != nil {
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return nil
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}
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r := io.NewBinReaderFromBuf(b)
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2019-11-28 16:06:09 +00:00
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si := &state.StorageItem{}
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2019-11-25 17:39:11 +00:00
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si.DecodeBinary(r)
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if r.Err != nil {
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return nil
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}
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return si
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}
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// PutStorageItem puts given StorageItem for given script with given
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// key into the given Store.
|
2019-11-28 16:06:09 +00:00
|
|
|
func (dao *dao) PutStorageItem(scripthash util.Uint160, key []byte, si *state.StorageItem) error {
|
2019-11-25 17:39:11 +00:00
|
|
|
return dao.Put(si, makeStorageItemKey(scripthash, key))
|
|
|
|
}
|
|
|
|
|
|
|
|
// DeleteStorageItem drops storage item for the given script with the
|
|
|
|
// given key from the Store.
|
|
|
|
func (dao *dao) DeleteStorageItem(scripthash util.Uint160, key []byte) error {
|
|
|
|
return dao.store.Delete(makeStorageItemKey(scripthash, key))
|
|
|
|
}
|
|
|
|
|
|
|
|
// GetStorageItems returns all storage items for a given scripthash.
|
2019-11-28 16:06:09 +00:00
|
|
|
func (dao *dao) GetStorageItems(hash util.Uint160) (map[string]*state.StorageItem, error) {
|
|
|
|
var siMap = make(map[string]*state.StorageItem)
|
2019-11-25 17:39:11 +00:00
|
|
|
var err error
|
|
|
|
|
|
|
|
saveToMap := func(k, v []byte) {
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
r := io.NewBinReaderFromBuf(v)
|
2019-11-28 16:06:09 +00:00
|
|
|
si := &state.StorageItem{}
|
2019-11-25 17:39:11 +00:00
|
|
|
si.DecodeBinary(r)
|
|
|
|
if r.Err != nil {
|
|
|
|
err = r.Err
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
// Cut prefix and hash.
|
|
|
|
siMap[string(k[21:])] = si
|
|
|
|
}
|
|
|
|
dao.store.Seek(storage.AppendPrefix(storage.STStorage, hash.BytesLE()), saveToMap)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
return siMap, 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.
|
2020-02-27 13:31:28 +00:00
|
|
|
func (dao *dao) GetBlock(hash util.Uint256) (*block.Block, uint32, error) {
|
2019-11-25 17:39:11 +00:00
|
|
|
key := storage.AppendPrefix(storage.DataBlock, hash.BytesLE())
|
|
|
|
b, err := dao.store.Get(key)
|
|
|
|
if err != nil {
|
2020-02-27 13:31:28 +00:00
|
|
|
return nil, 0, err
|
2019-11-25 17:39:11 +00:00
|
|
|
}
|
2020-02-27 13:31:28 +00:00
|
|
|
|
|
|
|
block, err := block.NewBlockFromTrimmedBytes(b[4:])
|
2019-11-25 17:39:11 +00:00
|
|
|
if err != nil {
|
2020-02-27 13:31:28 +00:00
|
|
|
return nil, 0, err
|
2019-11-25 17:39:11 +00:00
|
|
|
}
|
2020-02-27 13:31:28 +00:00
|
|
|
return block, binary.LittleEndian.Uint32(b[:4]), nil
|
2019-11-25 17:39:11 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// GetVersion attempts to get the current version stored in the
|
|
|
|
// underlying Store.
|
|
|
|
func (dao *dao) 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 *dao) 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 *dao) 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 *dao) 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.Sort(slice(sortedKeys))
|
|
|
|
|
|
|
|
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 *dao) 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)
|
|
|
|
|
2019-12-12 15:52:23 +00:00
|
|
|
var height = r.ReadU32LE()
|
2019-11-25 17:39:11 +00:00
|
|
|
|
|
|
|
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 *dao) PutVersion(v string) error {
|
|
|
|
return dao.store.Put(storage.SYSVersion.Bytes(), []byte(v))
|
|
|
|
}
|
|
|
|
|
|
|
|
// PutCurrentHeader stores current header.
|
|
|
|
func (dao *dao) 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)
|
2019-12-12 15:52:23 +00:00
|
|
|
hashes := make([]util.Uint256, 0)
|
|
|
|
br.ReadArray(&hashes)
|
2019-11-25 17:39:11 +00:00
|
|
|
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 *dao) 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.
|
2020-01-14 12:32:07 +00:00
|
|
|
func (dao *dao) StoreAsBlock(block *block.Block, sysFee uint32) error {
|
2019-11-25 17:39:11 +00:00
|
|
|
var (
|
|
|
|
key = storage.AppendPrefix(storage.DataBlock, block.Hash().BytesLE())
|
|
|
|
buf = io.NewBufBinWriter()
|
|
|
|
)
|
2020-02-27 13:31:28 +00:00
|
|
|
buf.WriteU32LE(sysFee)
|
2019-11-25 17:39:11 +00:00
|
|
|
b, err := block.Trim()
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
2019-12-12 15:52:23 +00:00
|
|
|
buf.WriteBytes(b)
|
2019-11-25 17:39:11 +00:00
|
|
|
if buf.Err != nil {
|
|
|
|
return buf.Err
|
|
|
|
}
|
|
|
|
return dao.store.Put(key, buf.Bytes())
|
|
|
|
}
|
|
|
|
|
|
|
|
// StoreAsCurrentBlock stores the given block witch prefix SYSCurrentBlock.
|
2020-01-14 12:32:07 +00:00
|
|
|
func (dao *dao) StoreAsCurrentBlock(block *block.Block) error {
|
2019-11-25 17:39:11 +00:00
|
|
|
buf := io.NewBufBinWriter()
|
2019-12-12 15:52:23 +00:00
|
|
|
h := block.Hash()
|
|
|
|
h.EncodeBinary(buf.BinWriter)
|
|
|
|
buf.WriteU32LE(block.Index)
|
2019-11-25 17:39:11 +00:00
|
|
|
return dao.store.Put(storage.SYSCurrentBlock.Bytes(), buf.Bytes())
|
|
|
|
}
|
|
|
|
|
|
|
|
// StoreAsTransaction stores the given TX as DataTransaction.
|
|
|
|
func (dao *dao) StoreAsTransaction(tx *transaction.Transaction, index uint32) error {
|
|
|
|
key := storage.AppendPrefix(storage.DataTransaction, tx.Hash().BytesLE())
|
|
|
|
buf := io.NewBufBinWriter()
|
2019-12-12 15:52:23 +00:00
|
|
|
buf.WriteU32LE(index)
|
2019-11-25 17:39:11 +00:00
|
|
|
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 *dao) IsDoubleSpend(tx *transaction.Transaction) bool {
|
|
|
|
if len(tx.Inputs) == 0 {
|
|
|
|
return false
|
|
|
|
}
|
2020-02-25 15:32:10 +00:00
|
|
|
for _, inputs := range transaction.GroupInputsByPrevHash(tx.Inputs) {
|
|
|
|
prevHash := inputs[0].PrevHash
|
2019-11-25 17:39:11 +00:00
|
|
|
unspent, err := dao.GetUnspentCoinState(prevHash)
|
|
|
|
if err != nil {
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
for _, input := range inputs {
|
2019-11-28 16:06:09 +00:00
|
|
|
if int(input.PrevIndex) >= len(unspent.states) || unspent.states[input.PrevIndex] == state.CoinSpent {
|
2019-11-25 17:39:11 +00:00
|
|
|
return true
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return false
|
|
|
|
}
|
2019-12-12 18:17:13 +00:00
|
|
|
|
2020-02-26 09:48:38 +00:00
|
|
|
// IsDoubleClaim verifies that given claim inputs are not already claimed by another tx.
|
|
|
|
func (dao *dao) IsDoubleClaim(claim *transaction.ClaimTX) bool {
|
|
|
|
if len(claim.Claims) == 0 {
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
for _, inputs := range transaction.GroupInputsByPrevHash(claim.Claims) {
|
|
|
|
prevHash := inputs[0].PrevHash
|
|
|
|
scs, err := dao.GetSpentCoinState(prevHash)
|
|
|
|
if err != nil {
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
for _, input := range inputs {
|
|
|
|
_, ok := scs.items[input.PrevIndex]
|
|
|
|
if !ok {
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
|
2019-12-12 18:17:13 +00:00
|
|
|
// Persist flushes all the changes made into the (supposedly) persistent
|
|
|
|
// underlying store.
|
|
|
|
func (dao *dao) Persist() (int, error) {
|
|
|
|
return dao.store.Persist()
|
|
|
|
}
|