855 lines
18 KiB
Go
855 lines
18 KiB
Go
package store
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import (
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"context"
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"crypto/sha256"
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"encoding/json"
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"fmt"
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"sync"
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"github.com/filecoin-project/go-lotus/build"
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"github.com/filecoin-project/go-lotus/chain/address"
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"github.com/filecoin-project/go-lotus/chain/state"
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amt "github.com/filecoin-project/go-amt-ipld"
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"github.com/filecoin-project/go-lotus/chain/types"
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block "github.com/ipfs/go-block-format"
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"github.com/ipfs/go-cid"
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dstore "github.com/ipfs/go-datastore"
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hamt "github.com/ipfs/go-hamt-ipld"
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blockstore "github.com/ipfs/go-ipfs-blockstore"
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bstore "github.com/ipfs/go-ipfs-blockstore"
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logging "github.com/ipfs/go-log"
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"github.com/pkg/errors"
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cbg "github.com/whyrusleeping/cbor-gen"
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pubsub "github.com/whyrusleeping/pubsub"
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"golang.org/x/xerrors"
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)
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var log = logging.Logger("chainstore")
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var chainHeadKey = dstore.NewKey("head")
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type ChainStore struct {
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bs bstore.Blockstore
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ds dstore.Datastore
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heaviestLk sync.Mutex
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heaviest *types.TipSet
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bestTips *pubsub.PubSub
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pubLk sync.Mutex
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tstLk sync.Mutex
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tipsets map[uint64][]cid.Cid
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headChangeNotifs []func(rev, app []*types.TipSet) error
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}
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func NewChainStore(bs bstore.Blockstore, ds dstore.Batching) *ChainStore {
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cs := &ChainStore{
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bs: bs,
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ds: ds,
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bestTips: pubsub.New(64),
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tipsets: make(map[uint64][]cid.Cid),
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}
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hcnf := func(rev, app []*types.TipSet) error {
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cs.pubLk.Lock()
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defer cs.pubLk.Unlock()
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notif := make([]*HeadChange, len(rev)+len(app))
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for i, r := range rev {
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notif[i] = &HeadChange{
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Type: HCRevert,
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Val: r,
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}
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}
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for i, r := range app {
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notif[i+len(rev)] = &HeadChange{
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Type: HCApply,
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Val: r,
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}
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}
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cs.bestTips.Pub(notif, "headchange")
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return nil
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}
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cs.headChangeNotifs = append(cs.headChangeNotifs, hcnf)
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return cs
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}
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func (cs *ChainStore) Load() error {
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head, err := cs.ds.Get(chainHeadKey)
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if err == dstore.ErrNotFound {
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log.Warn("no previous chain state found")
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return nil
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}
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if err != nil {
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return errors.Wrap(err, "failed to load chain state from datastore")
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}
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var tscids []cid.Cid
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if err := json.Unmarshal(head, &tscids); err != nil {
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return errors.Wrap(err, "failed to unmarshal stored chain head")
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}
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ts, err := cs.LoadTipSet(tscids)
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if err != nil {
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return xerrors.Errorf("loading tipset: %w", err)
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}
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cs.heaviest = ts
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return nil
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}
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func (cs *ChainStore) writeHead(ts *types.TipSet) error {
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data, err := json.Marshal(ts.Cids())
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if err != nil {
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return errors.Wrap(err, "failed to marshal tipset")
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}
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if err := cs.ds.Put(chainHeadKey, data); err != nil {
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return errors.Wrap(err, "failed to write chain head to datastore")
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}
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return nil
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}
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const (
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HCRevert = "revert"
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HCApply = "apply"
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HCCurrent = "current"
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)
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type HeadChange struct {
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Type string
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Val *types.TipSet
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}
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func (cs *ChainStore) SubHeadChanges(ctx context.Context) chan []*HeadChange {
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cs.pubLk.Lock()
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subch := cs.bestTips.Sub("headchange")
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head := cs.GetHeaviestTipSet()
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cs.pubLk.Unlock()
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out := make(chan []*HeadChange, 16)
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out <- []*HeadChange{{
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Type: HCCurrent,
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Val: head,
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}}
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go func() {
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defer close(out)
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for {
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select {
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case val, ok := <-subch:
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if !ok {
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log.Warn("chain head sub exit loop")
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return
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}
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if len(out) > 0 {
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log.Warnf("head change sub is slow, has %d buffered entries", len(out))
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}
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select {
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case out <- val.([]*HeadChange):
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case <-ctx.Done():
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}
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case <-ctx.Done():
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go cs.bestTips.Unsub(subch)
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}
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}
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}()
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return out
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}
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func (cs *ChainStore) SubscribeHeadChanges(f func(rev, app []*types.TipSet) error) {
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cs.headChangeNotifs = append(cs.headChangeNotifs, f)
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}
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func (cs *ChainStore) SetGenesis(b *types.BlockHeader) error {
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fts := &FullTipSet{
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Blocks: []*types.FullBlock{
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{Header: b},
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},
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}
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if err := cs.PutTipSet(fts); err != nil {
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return err
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}
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return cs.ds.Put(dstore.NewKey("0"), b.Cid().Bytes())
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}
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func (cs *ChainStore) PutTipSet(ts *FullTipSet) error {
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for _, b := range ts.Blocks {
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if err := cs.persistBlock(b); err != nil {
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return err
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}
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}
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expanded, err := cs.expandTipset(ts.TipSet().Blocks()[0])
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if err != nil {
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return xerrors.Errorf("errored while expanding tipset: %w", err)
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}
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log.Debugf("expanded %s into %s\n", ts.TipSet().Cids(), expanded.Cids())
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if err := cs.MaybeTakeHeavierTipSet(expanded); err != nil {
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return errors.Wrap(err, "MaybeTakeHeavierTipSet failed in PutTipSet")
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}
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return nil
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}
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func (cs *ChainStore) MaybeTakeHeavierTipSet(ts *types.TipSet) error {
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cs.heaviestLk.Lock()
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defer cs.heaviestLk.Unlock()
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if cs.heaviest == nil || cs.Weight(ts) > cs.Weight(cs.heaviest) {
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// TODO: don't do this for initial sync. Now that we don't have a
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// difference between 'bootstrap sync' and 'caught up' sync, we need
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// some other heuristic.
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if cs.heaviest != nil {
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revert, apply, err := cs.ReorgOps(cs.heaviest, ts)
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if err != nil {
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return errors.Wrap(err, "computing reorg ops failed")
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}
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for _, hcf := range cs.headChangeNotifs {
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if err := hcf(revert, apply); err != nil {
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return errors.Wrap(err, "head change func errored (BAD)")
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}
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}
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} else {
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log.Warn("no heaviest tipset found, using %s", ts.Cids())
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}
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log.Debugf("New heaviest tipset! %s", ts.Cids())
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cs.heaviest = ts
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if err := cs.writeHead(ts); err != nil {
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log.Errorf("failed to write chain head: %s", err)
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return nil
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}
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}
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return nil
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}
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func (cs *ChainStore) Contains(ts *types.TipSet) (bool, error) {
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for _, c := range ts.Cids() {
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has, err := cs.bs.Has(c)
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if err != nil {
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return false, err
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}
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if !has {
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return false, nil
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}
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}
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return true, nil
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}
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func (cs *ChainStore) GetBlock(c cid.Cid) (*types.BlockHeader, error) {
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sb, err := cs.bs.Get(c)
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if err != nil {
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return nil, err
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}
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return types.DecodeBlock(sb.RawData())
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}
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func (cs *ChainStore) LoadTipSet(cids []cid.Cid) (*types.TipSet, error) {
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var blks []*types.BlockHeader
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for _, c := range cids {
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b, err := cs.GetBlock(c)
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if err != nil {
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return nil, xerrors.Errorf("get block %s: %w", c, err)
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}
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blks = append(blks, b)
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}
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return types.NewTipSet(blks)
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}
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// returns true if 'a' is an ancestor of 'b'
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func (cs *ChainStore) IsAncestorOf(a, b *types.TipSet) (bool, error) {
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if b.Height() <= a.Height() {
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return false, nil
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}
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cur := b
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for !a.Equals(cur) && cur.Height() > a.Height() {
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next, err := cs.LoadTipSet(b.Parents())
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if err != nil {
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return false, err
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}
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cur = next
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}
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return cur.Equals(a), nil
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}
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func (cs *ChainStore) NearestCommonAncestor(a, b *types.TipSet) (*types.TipSet, error) {
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l, _, err := cs.ReorgOps(a, b)
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if err != nil {
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return nil, err
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}
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return cs.LoadTipSet(l[len(l)-1].Parents())
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}
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func (cs *ChainStore) ReorgOps(a, b *types.TipSet) ([]*types.TipSet, []*types.TipSet, error) {
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left := a
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right := b
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var leftChain, rightChain []*types.TipSet
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for !left.Equals(right) {
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if left.Height() > right.Height() {
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leftChain = append(leftChain, left)
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par, err := cs.LoadTipSet(left.Parents())
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if err != nil {
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return nil, nil, err
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}
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left = par
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} else {
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rightChain = append(rightChain, right)
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par, err := cs.LoadTipSet(right.Parents())
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if err != nil {
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log.Infof("failed to fetch right.Parents: %s", err)
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return nil, nil, err
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}
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right = par
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}
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}
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return leftChain, rightChain, nil
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}
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func (cs *ChainStore) Weight(ts *types.TipSet) uint64 {
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return ts.Blocks()[0].ParentWeight.Uint64() + uint64(len(ts.Cids()))
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}
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func (cs *ChainStore) GetHeaviestTipSet() *types.TipSet {
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cs.heaviestLk.Lock()
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defer cs.heaviestLk.Unlock()
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return cs.heaviest
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}
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func (cs *ChainStore) addToTipSetTracker(b *types.BlockHeader) error {
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cs.tstLk.Lock()
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defer cs.tstLk.Unlock()
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tss := cs.tipsets[b.Height]
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for _, oc := range tss {
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if oc == b.Cid() {
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log.Debug("tried to add block to tipset tracker that was already there")
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return nil
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}
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}
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cs.tipsets[b.Height] = append(tss, b.Cid())
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// TODO: do we want to look for slashable submissions here? might as well...
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return nil
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}
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func (cs *ChainStore) PersistBlockHeader(b *types.BlockHeader) error {
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sb, err := b.ToStorageBlock()
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if err != nil {
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return err
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}
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if err := cs.addToTipSetTracker(b); err != nil {
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return xerrors.Errorf("failed to insert new block (%s) into tipset tracker: %w", b.Cid(), err)
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}
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return cs.bs.Put(sb)
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}
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func (cs *ChainStore) persistBlock(b *types.FullBlock) error {
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if err := cs.PersistBlockHeader(b.Header); err != nil {
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return err
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}
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for _, m := range b.BlsMessages {
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if _, err := cs.PutMessage(m); err != nil {
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return err
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}
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}
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for _, m := range b.SecpkMessages {
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if _, err := cs.PutMessage(m); err != nil {
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return err
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}
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}
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return nil
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}
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type storable interface {
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ToStorageBlock() (block.Block, error)
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}
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func PutMessage(bs blockstore.Blockstore, m storable) (cid.Cid, error) {
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b, err := m.ToStorageBlock()
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if err != nil {
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return cid.Undef, err
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}
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if err := bs.Put(b); err != nil {
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return cid.Undef, err
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}
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return b.Cid(), nil
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}
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func (cs *ChainStore) PutMessage(m storable) (cid.Cid, error) {
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return PutMessage(cs.bs, m)
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}
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func (cs *ChainStore) expandTipset(b *types.BlockHeader) (*types.TipSet, error) {
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// Hold lock for the whole function for now, if it becomes a problem we can
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// fix pretty easily
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cs.tstLk.Lock()
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defer cs.tstLk.Unlock()
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all := []*types.BlockHeader{b}
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tsets, ok := cs.tipsets[b.Height]
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if !ok {
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return types.NewTipSet(all)
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}
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for _, bhc := range tsets {
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if bhc == b.Cid() {
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continue
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}
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h, err := cs.GetBlock(bhc)
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if err != nil {
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return nil, xerrors.Errorf("failed to load block (%s) for tipset expansion: %w", bhc, err)
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}
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if types.CidArrsEqual(h.Parents, b.Parents) {
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all = append(all, h)
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}
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}
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// TODO: other validation...?
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return types.NewTipSet(all)
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}
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func (cs *ChainStore) AddBlock(b *types.BlockHeader) error {
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if err := cs.PersistBlockHeader(b); err != nil {
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return err
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}
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ts, err := cs.expandTipset(b)
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if err != nil {
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return err
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}
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if err := cs.MaybeTakeHeavierTipSet(ts); err != nil {
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return errors.Wrap(err, "MaybeTakeHeavierTipSet failed")
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}
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return nil
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}
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func (cs *ChainStore) GetGenesis() (*types.BlockHeader, error) {
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data, err := cs.ds.Get(dstore.NewKey("0"))
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if err != nil {
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return nil, err
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}
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c, err := cid.Cast(data)
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if err != nil {
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return nil, err
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}
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genb, err := cs.bs.Get(c)
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if err != nil {
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return nil, err
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}
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return types.DecodeBlock(genb.RawData())
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}
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func (cs *ChainStore) GetMessage(c cid.Cid) (*types.Message, error) {
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sb, err := cs.bs.Get(c)
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if err != nil {
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log.Errorf("get message get failed: %s: %s", c, err)
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return nil, err
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}
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return types.DecodeMessage(sb.RawData())
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}
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func (cs *ChainStore) GetSignedMessage(c cid.Cid) (*types.SignedMessage, error) {
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sb, err := cs.bs.Get(c)
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if err != nil {
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log.Errorf("get message get failed: %s: %s", c, err)
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return nil, err
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}
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return types.DecodeSignedMessage(sb.RawData())
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}
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func (cs *ChainStore) readAMTCids(root cid.Cid) ([]cid.Cid, error) {
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bs := amt.WrapBlockstore(cs.bs)
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a, err := amt.LoadAMT(bs, root)
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if err != nil {
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return nil, xerrors.Errorf("amt load: %w", err)
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}
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var cids []cid.Cid
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for i := uint64(0); i < a.Count; i++ {
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var c cbg.CborCid
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if err := a.Get(i, &c); err != nil {
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return nil, xerrors.Errorf("failed to load cid from amt: %w", err)
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}
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cids = append(cids, cid.Cid(c))
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}
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return cids, nil
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}
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type ChainMsg interface {
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Cid() cid.Cid
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VMMessage() *types.Message
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}
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func (cs *ChainStore) MessagesForTipset(ts *types.TipSet) ([]ChainMsg, error) {
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applied := make(map[address.Address]uint64)
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balances := make(map[address.Address]types.BigInt)
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cst := hamt.CSTFromBstore(cs.bs)
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st, err := state.LoadStateTree(cst, ts.Blocks()[0].ParentStateRoot)
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if err != nil {
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return nil, xerrors.Errorf("failed to load state tree")
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}
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preloadAddr := func(a address.Address) error {
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if _, ok := applied[a]; !ok {
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act, err := st.GetActor(a)
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if err != nil {
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return err
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}
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applied[a] = act.Nonce
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balances[a] = act.Balance
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}
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return nil
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}
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var out []ChainMsg
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for _, b := range ts.Blocks() {
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bms, sms, err := cs.MessagesForBlock(b)
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if err != nil {
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return nil, xerrors.Errorf("failed to get messages for block: %w", err)
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}
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|
|
cmsgs := make([]ChainMsg, 0, len(bms)+len(sms))
|
|
for _, m := range bms {
|
|
cmsgs = append(cmsgs, m)
|
|
}
|
|
for _, sm := range sms {
|
|
cmsgs = append(cmsgs, sm)
|
|
}
|
|
|
|
for _, cm := range cmsgs {
|
|
m := cm.VMMessage()
|
|
if err := preloadAddr(m.From); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if applied[m.From] != m.Nonce {
|
|
continue
|
|
}
|
|
applied[m.From]++
|
|
|
|
if balances[m.From].LessThan(m.RequiredFunds()) {
|
|
continue
|
|
}
|
|
balances[m.From] = types.BigSub(balances[m.From], m.RequiredFunds())
|
|
|
|
out = append(out, cm)
|
|
}
|
|
}
|
|
|
|
return out, nil
|
|
}
|
|
|
|
func (cs *ChainStore) MessagesForBlock(b *types.BlockHeader) ([]*types.Message, []*types.SignedMessage, error) {
|
|
cst := hamt.CSTFromBstore(cs.bs)
|
|
var msgmeta types.MsgMeta
|
|
if err := cst.Get(context.TODO(), b.Messages, &msgmeta); err != nil {
|
|
return nil, nil, xerrors.Errorf("failed to load msgmeta: %w", err)
|
|
}
|
|
|
|
blscids, err := cs.readAMTCids(msgmeta.BlsMessages)
|
|
if err != nil {
|
|
return nil, nil, errors.Wrap(err, "loading bls message cids for block")
|
|
}
|
|
|
|
secpkcids, err := cs.readAMTCids(msgmeta.SecpkMessages)
|
|
if err != nil {
|
|
return nil, nil, errors.Wrap(err, "loading secpk message cids for block")
|
|
}
|
|
|
|
blsmsgs, err := cs.LoadMessagesFromCids(blscids)
|
|
if err != nil {
|
|
return nil, nil, errors.Wrap(err, "loading bls messages for block")
|
|
}
|
|
|
|
secpkmsgs, err := cs.LoadSignedMessagesFromCids(secpkcids)
|
|
if err != nil {
|
|
return nil, nil, errors.Wrap(err, "loading secpk messages for block")
|
|
}
|
|
|
|
return blsmsgs, secpkmsgs, nil
|
|
}
|
|
|
|
func (cs *ChainStore) GetReceipt(b *types.BlockHeader, i int) (*types.MessageReceipt, error) {
|
|
bs := amt.WrapBlockstore(cs.bs)
|
|
a, err := amt.LoadAMT(bs, b.ParentMessageReceipts)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "amt load")
|
|
}
|
|
|
|
var r types.MessageReceipt
|
|
if err := a.Get(uint64(i), &r); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &r, nil
|
|
}
|
|
|
|
func (cs *ChainStore) LoadMessagesFromCids(cids []cid.Cid) ([]*types.Message, error) {
|
|
msgs := make([]*types.Message, 0, len(cids))
|
|
for i, c := range cids {
|
|
m, err := cs.GetMessage(c)
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "failed to get message: (%s):%d", c, i)
|
|
}
|
|
|
|
msgs = append(msgs, m)
|
|
}
|
|
|
|
return msgs, nil
|
|
}
|
|
|
|
func (cs *ChainStore) LoadSignedMessagesFromCids(cids []cid.Cid) ([]*types.SignedMessage, error) {
|
|
msgs := make([]*types.SignedMessage, 0, len(cids))
|
|
for i, c := range cids {
|
|
m, err := cs.GetSignedMessage(c)
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "failed to get message: (%s):%d", c, i)
|
|
}
|
|
|
|
msgs = append(msgs, m)
|
|
}
|
|
|
|
return msgs, nil
|
|
}
|
|
|
|
func (cs *ChainStore) WaitForMessage(ctx context.Context, mcid cid.Cid) (*types.MessageReceipt, error) {
|
|
tsub := cs.SubHeadChanges(ctx)
|
|
|
|
head := cs.GetHeaviestTipSet()
|
|
|
|
r, err := cs.tipsetExecutedMessage(head, mcid)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if r != nil {
|
|
return r, nil
|
|
}
|
|
|
|
for {
|
|
select {
|
|
case notif, ok := <-tsub:
|
|
if !ok {
|
|
return nil, ctx.Err()
|
|
}
|
|
for _, val := range notif {
|
|
switch val.Type {
|
|
case HCRevert:
|
|
continue
|
|
case HCApply:
|
|
r, err := cs.tipsetExecutedMessage(val.Val, mcid)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if r != nil {
|
|
return r, nil
|
|
}
|
|
}
|
|
}
|
|
case <-ctx.Done():
|
|
return nil, ctx.Err()
|
|
}
|
|
}
|
|
}
|
|
|
|
func (cs *ChainStore) tipsetExecutedMessage(ts *types.TipSet, msg cid.Cid) (*types.MessageReceipt, error) {
|
|
pts, err := cs.LoadTipSet(ts.Parents())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
cm, err := cs.MessagesForTipset(pts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for i, m := range cm {
|
|
if m.Cid() == msg {
|
|
return cs.GetReceipt(ts.Blocks()[0], i)
|
|
}
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
func (cs *ChainStore) blockContainsMsg(blk *types.BlockHeader, msg cid.Cid) (*types.MessageReceipt, error) {
|
|
cst := hamt.CSTFromBstore(cs.bs)
|
|
var msgmeta types.MsgMeta
|
|
if err := cst.Get(context.TODO(), blk.Messages, &msgmeta); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
blscids, err := cs.readAMTCids(msgmeta.BlsMessages)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "loading bls message cids for block")
|
|
}
|
|
|
|
for i, c := range blscids {
|
|
if c == msg {
|
|
return cs.GetReceipt(blk, i)
|
|
}
|
|
}
|
|
|
|
secpkcids, err := cs.readAMTCids(msgmeta.SecpkMessages)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "loading secpk message cids for block")
|
|
}
|
|
|
|
for i, c := range secpkcids {
|
|
if c == msg {
|
|
return cs.GetReceipt(blk, i+len(blscids))
|
|
}
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
func (cs *ChainStore) Blockstore() blockstore.Blockstore {
|
|
return cs.bs
|
|
}
|
|
|
|
func (cs *ChainStore) TryFillTipSet(ts *types.TipSet) (*FullTipSet, error) {
|
|
var out []*types.FullBlock
|
|
|
|
for _, b := range ts.Blocks() {
|
|
bmsgs, smsgs, err := cs.MessagesForBlock(b)
|
|
if err != nil {
|
|
// TODO: check for 'not found' errors, and only return nil if this
|
|
// is actually a 'not found' error
|
|
return nil, nil
|
|
}
|
|
|
|
fb := &types.FullBlock{
|
|
Header: b,
|
|
BlsMessages: bmsgs,
|
|
SecpkMessages: smsgs,
|
|
}
|
|
|
|
out = append(out, fb)
|
|
}
|
|
return NewFullTipSet(out), nil
|
|
}
|
|
|
|
func (cs *ChainStore) GetRandomness(ctx context.Context, blks []cid.Cid, tickets []*types.Ticket, lb int64) ([]byte, error) {
|
|
if lb < 0 {
|
|
return nil, fmt.Errorf("negative lookback parameters are not valid (got %d)", lb)
|
|
}
|
|
lt := int64(len(tickets))
|
|
if lb < lt {
|
|
log.Warn("self sampling randomness. this should be extremely rare, if you see this often it may be a bug")
|
|
|
|
t := tickets[lt-(1+lb)]
|
|
|
|
return t.VDFResult, nil
|
|
}
|
|
|
|
nv := lb - lt
|
|
|
|
for {
|
|
nts, err := cs.LoadTipSet(blks)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
mtb := nts.MinTicketBlock()
|
|
lt := int64(len(mtb.Tickets))
|
|
if nv < lt {
|
|
t := mtb.Tickets[lt-(1+nv)]
|
|
return t.VDFResult, nil
|
|
}
|
|
|
|
nv -= lt
|
|
|
|
// special case for lookback behind genesis block
|
|
// TODO(spec): this is not in the spec, need to sync that
|
|
if mtb.Height == 0 {
|
|
|
|
t := mtb.Tickets[0]
|
|
|
|
rval := t.VDFResult
|
|
for i := int64(0); i < nv; i++ {
|
|
h := sha256.Sum256(rval)
|
|
rval = h[:]
|
|
}
|
|
return rval, nil
|
|
}
|
|
|
|
blks = mtb.Parents
|
|
}
|
|
}
|
|
|
|
func (cs *ChainStore) GetTipsetByHeight(ctx context.Context, h uint64, ts *types.TipSet) (*types.TipSet, error) {
|
|
if ts == nil {
|
|
ts = cs.GetHeaviestTipSet()
|
|
}
|
|
|
|
if h > ts.Height() {
|
|
return nil, xerrors.Errorf("looking for tipset with height less than start point")
|
|
}
|
|
|
|
if ts.Height()-h > build.ForkLengthThreshold {
|
|
log.Warnf("expensive call to GetTipsetByHeight, seeking %d levels", ts.Height()-h)
|
|
}
|
|
|
|
for {
|
|
mtb := ts.MinTicketBlock()
|
|
if h >= ts.Height()-uint64(len(mtb.Tickets)) {
|
|
return ts, nil
|
|
}
|
|
|
|
pts, err := cs.LoadTipSet(ts.Parents())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
ts = pts
|
|
}
|
|
}
|