601 lines
12 KiB
Go
601 lines
12 KiB
Go
package store
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import (
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"context"
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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/chain/address"
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"github.com/filecoin-project/go-lotus/chain/state"
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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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pubsub "github.com/whyrusleeping/pubsub"
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sharray "github.com/whyrusleeping/sharray"
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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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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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}
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hcnf := func(rev, app []*types.TipSet) error {
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for _, r := range rev {
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cs.bestTips.Pub(&HeadChange{
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Type: HCRevert,
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Val: r,
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}, "headchange")
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}
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for _, r := range app {
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cs.bestTips.Pub(&HeadChange{
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Type: HCApply,
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Val: r,
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}, "headchange")
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}
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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 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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func (cs *ChainStore) SubNewTips() chan *types.TipSet {
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subch := cs.bestTips.Sub("best")
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out := make(chan *types.TipSet)
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go func() {
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defer close(out)
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for val := range subch {
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out <- val.(*types.TipSet)
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}
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}()
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return out
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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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)
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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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subch := cs.bestTips.Sub("headchange")
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out := make(chan *HeadChange, 16)
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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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return
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}
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out <- val.(*HeadChange)
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case <-ctx.Done():
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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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gents, err := types.NewTipSet([]*types.BlockHeader{b})
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if err != nil {
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return err
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}
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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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cs.heaviest = gents
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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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if err := cs.MaybeTakeHeavierTipSet(ts.TipSet()); 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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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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log.Infof("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, 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) 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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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.Messages {
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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) 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, _ := types.NewTipSet([]*types.BlockHeader{b})
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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) TipSetState(cids []cid.Cid) (cid.Cid, error) {
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ts, err := cs.LoadTipSet(cids)
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if err != nil {
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log.Error("failed loading tipset: ", cids)
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return cid.Undef, err
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}
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if len(ts.Blocks()) == 1 {
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return ts.Blocks()[0].StateRoot, nil
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}
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panic("cant handle multiblock tipsets yet")
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}
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func (cs *ChainStore) GetMessage(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) MessageCidsForBlock(b *types.BlockHeader) ([]cid.Cid, error) {
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cst := hamt.CSTFromBstore(cs.bs)
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shar, err := sharray.Load(context.TODO(), b.Messages, 4, cst)
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if err != nil {
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return nil, errors.Wrap(err, "sharray load")
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}
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var cids []cid.Cid
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err = shar.ForEach(context.TODO(), func(i interface{}) error {
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c, ok := i.(cid.Cid)
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if !ok {
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return fmt.Errorf("value in message sharray was not a cid")
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}
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cids = append(cids, c)
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return nil
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})
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if err != nil {
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return nil, err
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}
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return cids, nil
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}
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func (cs *ChainStore) MessagesForBlock(b *types.BlockHeader) ([]*types.SignedMessage, error) {
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cids, err := cs.MessageCidsForBlock(b)
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if err != nil {
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return nil, errors.Wrap(err, "loading message cids for block")
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}
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return cs.LoadMessagesFromCids(cids)
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}
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func (cs *ChainStore) GetReceipt(b *types.BlockHeader, i int) (*types.MessageReceipt, error) {
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cst := hamt.CSTFromBstore(cs.bs)
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shar, err := sharray.Load(context.TODO(), b.MessageReceipts, 4, cst)
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if err != nil {
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return nil, errors.Wrap(err, "sharray load")
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}
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ival, err := shar.Get(context.TODO(), i)
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if err != nil {
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return nil, err
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}
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// @warpfork, @EricMyhre help me. save me.
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out, err := json.Marshal(ival)
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if err != nil {
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return nil, err
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}
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var r types.MessageReceipt
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if err := json.Unmarshal(out, &r); err != nil {
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return nil, err
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}
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return &r, nil
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}
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func (cs *ChainStore) LoadMessagesFromCids(cids []cid.Cid) ([]*types.SignedMessage, error) {
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msgs := make([]*types.SignedMessage, 0, len(cids))
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for i, c := range cids {
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m, err := cs.GetMessage(c)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to get message: (%s):%d", c, i)
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}
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msgs = append(msgs, m)
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}
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return msgs, nil
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}
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func (cs *ChainStore) GetBalance(addr address.Address) (types.BigInt, error) {
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act, err := cs.GetActor(addr)
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if err != nil {
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return types.BigInt{}, err
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}
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return act.Balance, nil
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}
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func (cs *ChainStore) GetActor(addr address.Address) (*types.Actor, error) {
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ts := cs.GetHeaviestTipSet()
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stcid, err := cs.TipSetState(ts.Cids())
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if err != nil {
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return nil, err
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}
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cst := hamt.CSTFromBstore(cs.bs)
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state, err := state.LoadStateTree(cst, stcid)
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if err != nil {
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return nil, err
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}
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return state.GetActor(addr)
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}
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func (cs *ChainStore) WaitForMessage(ctx context.Context, mcid cid.Cid) (cid.Cid, *types.MessageReceipt, error) {
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tsub := cs.SubHeadChanges(ctx)
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head := cs.GetHeaviestTipSet()
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bc, r, err := cs.tipsetContainsMsg(head, mcid)
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if err != nil {
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return cid.Undef, nil, err
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}
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if r != nil {
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return bc, r, nil
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}
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for {
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select {
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case val := <-tsub:
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switch val.Type {
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case HCRevert:
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continue
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case HCApply:
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bc, r, err := cs.tipsetContainsMsg(val.Val, mcid)
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if err != nil {
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return cid.Undef, nil, err
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}
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if r != nil {
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return bc, r, nil
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}
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}
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case <-ctx.Done():
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return cid.Undef, nil, ctx.Err()
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}
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}
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}
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func (cs *ChainStore) tipsetContainsMsg(ts *types.TipSet, msg cid.Cid) (cid.Cid, *types.MessageReceipt, error) {
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for _, b := range ts.Blocks() {
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r, err := cs.blockContainsMsg(b, msg)
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if err != nil {
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return cid.Undef, nil, err
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}
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if r != nil {
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return b.Cid(), r, nil
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}
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}
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return cid.Undef, nil, nil
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}
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func (cs *ChainStore) blockContainsMsg(blk *types.BlockHeader, msg cid.Cid) (*types.MessageReceipt, error) {
|
|
msgs, err := cs.MessageCidsForBlock(blk)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for i, mc := range msgs {
|
|
if mc == msg {
|
|
return cs.GetReceipt(blk, i)
|
|
}
|
|
}
|
|
|
|
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() {
|
|
msgs, 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,
|
|
Messages: msgs,
|
|
}
|
|
|
|
out = append(out, fb)
|
|
}
|
|
return NewFullTipSet(out), nil
|
|
}
|