2019-07-05 14:29:17 +00:00
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package chain
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import (
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"context"
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"fmt"
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"sync"
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2019-07-26 18:16:57 +00:00
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"golang.org/x/xerrors"
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2019-07-12 23:52:25 +00:00
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"github.com/filecoin-project/go-lotus/chain/actors"
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2019-07-26 04:54:22 +00:00
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"github.com/filecoin-project/go-lotus/chain/store"
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2019-07-12 10:23:05 +00:00
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"github.com/filecoin-project/go-lotus/chain/types"
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2019-07-26 04:54:22 +00:00
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"github.com/filecoin-project/go-lotus/chain/vm"
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2019-07-08 12:51:45 +00:00
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2019-07-05 14:29:17 +00:00
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"github.com/ipfs/go-cid"
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dstore "github.com/ipfs/go-datastore"
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"github.com/ipfs/go-hamt-ipld"
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bstore "github.com/ipfs/go-ipfs-blockstore"
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2019-07-26 04:54:22 +00:00
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logging "github.com/ipfs/go-log"
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2019-07-30 16:39:07 +00:00
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"github.com/libp2p/go-libp2p-core/peer"
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2019-07-05 14:29:17 +00:00
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"github.com/pkg/errors"
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"github.com/whyrusleeping/sharray"
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)
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2019-07-26 04:54:22 +00:00
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const ForkLengthThreshold = 20
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var log = logging.Logger("chain")
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2019-07-05 14:29:17 +00:00
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type Syncer struct {
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// The heaviest known tipset in the network.
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2019-07-26 04:54:22 +00:00
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head *types.TipSet
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2019-07-05 14:29:17 +00:00
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// The interface for accessing and putting tipsets into local storage
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2019-07-26 04:54:22 +00:00
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store *store.ChainStore
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2019-07-05 14:29:17 +00:00
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2019-07-05 14:46:21 +00:00
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// The known Genesis tipset
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2019-07-26 04:54:22 +00:00
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Genesis *types.TipSet
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2019-07-05 14:29:17 +00:00
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syncLock sync.Mutex
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// TipSets known to be invalid
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bad BadTipSetCache
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// handle to the block sync service
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2019-07-08 14:07:09 +00:00
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Bsync *BlockSync
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2019-07-05 14:29:17 +00:00
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2019-07-11 02:36:43 +00:00
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self peer.ID
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2019-07-05 14:29:17 +00:00
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// peer heads
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// Note: clear cache on disconnects
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2019-07-26 04:54:22 +00:00
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peerHeads map[peer.ID]*types.TipSet
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2019-07-05 14:29:17 +00:00
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peerHeadsLk sync.Mutex
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}
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2019-07-26 04:54:22 +00:00
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func NewSyncer(cs *store.ChainStore, bsync *BlockSync, self peer.ID) (*Syncer, error) {
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2019-07-05 14:29:17 +00:00
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gen, err := cs.GetGenesis()
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if err != nil {
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return nil, err
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}
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2019-07-26 04:54:22 +00:00
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gent, err := types.NewTipSet([]*types.BlockHeader{gen})
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2019-07-05 14:29:17 +00:00
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if err != nil {
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return nil, err
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}
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return &Syncer{
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2019-07-05 14:46:21 +00:00
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Genesis: gent,
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2019-07-08 14:07:09 +00:00
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Bsync: bsync,
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2019-07-26 04:54:22 +00:00
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peerHeads: make(map[peer.ID]*types.TipSet),
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2019-07-05 14:29:17 +00:00
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head: cs.GetHeaviestTipSet(),
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store: cs,
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2019-07-11 02:36:43 +00:00
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self: self,
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2019-07-05 14:29:17 +00:00
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}, nil
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}
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type BadTipSetCache struct {
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badBlocks map[cid.Cid]struct{}
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}
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const BootstrapPeerThreshold = 1
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// InformNewHead informs the syncer about a new potential tipset
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// This should be called when connecting to new peers, and additionally
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// when receiving new blocks from the network
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2019-07-26 04:54:22 +00:00
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func (syncer *Syncer) InformNewHead(from peer.ID, fts *store.FullTipSet) {
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2019-07-05 14:29:17 +00:00
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if fts == nil {
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panic("bad")
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}
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2019-07-11 02:36:43 +00:00
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if from == syncer.self {
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// TODO: this is kindof a hack...
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log.Infof("got block from ourselves")
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2019-07-30 16:39:07 +00:00
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if err := syncer.Sync(fts); err != nil {
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2019-07-11 02:36:43 +00:00
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log.Errorf("failed to sync our own block: %s", err)
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}
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return
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}
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2019-07-05 14:29:17 +00:00
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syncer.peerHeadsLk.Lock()
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syncer.peerHeads[from] = fts.TipSet()
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syncer.peerHeadsLk.Unlock()
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2019-07-08 14:07:09 +00:00
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syncer.Bsync.AddPeer(from)
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2019-07-05 14:29:17 +00:00
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go func() {
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2019-07-30 16:39:07 +00:00
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if err := syncer.Sync(fts); err != nil {
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2019-07-26 18:16:57 +00:00
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log.Errorf("sync error: %s", err)
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2019-07-05 14:29:17 +00:00
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}
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}()
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}
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2019-07-25 22:15:03 +00:00
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func (syncer *Syncer) InformNewBlock(from peer.ID, blk *types.FullBlock) {
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2019-07-05 14:29:17 +00:00
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// TODO: search for other blocks that could form a tipset with this block
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// and then send that tipset to InformNewHead
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2019-07-26 04:54:22 +00:00
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fts := &store.FullTipSet{Blocks: []*types.FullBlock{blk}}
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2019-07-05 14:29:17 +00:00
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syncer.InformNewHead(from, fts)
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}
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2019-07-26 04:54:22 +00:00
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func reverse(tips []*types.TipSet) []*types.TipSet {
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out := make([]*types.TipSet, len(tips))
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2019-07-05 14:29:17 +00:00
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for i := 0; i < len(tips); i++ {
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out[i] = tips[len(tips)-(i+1)]
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}
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return out
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}
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func copyBlockstore(from, to bstore.Blockstore) error {
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cids, err := from.AllKeysChan(context.TODO())
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if err != nil {
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return err
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}
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for c := range cids {
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b, err := from.Get(c)
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if err != nil {
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return err
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}
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if err := to.Put(b); 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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2019-07-26 04:54:22 +00:00
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func zipTipSetAndMessages(cst *hamt.CborIpldStore, ts *types.TipSet, messages []*types.SignedMessage, msgincl [][]int) (*store.FullTipSet, error) {
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2019-07-05 14:29:17 +00:00
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if len(ts.Blocks()) != len(msgincl) {
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return nil, fmt.Errorf("msgincl length didnt match tipset size")
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}
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2019-07-26 04:54:22 +00:00
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fts := &store.FullTipSet{}
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2019-07-05 14:29:17 +00:00
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for bi, b := range ts.Blocks() {
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2019-07-25 22:15:03 +00:00
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var msgs []*types.SignedMessage
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2019-07-05 14:29:17 +00:00
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var msgCids []interface{}
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for _, m := range msgincl[bi] {
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msgs = append(msgs, messages[m])
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msgCids = append(msgCids, messages[m].Cid())
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}
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mroot, err := sharray.Build(context.TODO(), 4, msgCids, cst)
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if err != nil {
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return nil, err
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}
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if b.Messages != mroot {
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return nil, fmt.Errorf("messages didnt match message root in header")
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}
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2019-07-25 22:15:03 +00:00
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fb := &types.FullBlock{
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2019-07-05 14:29:17 +00:00
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Header: b,
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Messages: msgs,
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}
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fts.Blocks = append(fts.Blocks, fb)
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}
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return fts, nil
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}
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2019-07-26 04:54:22 +00:00
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func (syncer *Syncer) selectHead(heads map[peer.ID]*types.TipSet) (*types.TipSet, error) {
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var headsArr []*types.TipSet
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2019-07-05 14:29:17 +00:00
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for _, ts := range heads {
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headsArr = append(headsArr, ts)
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}
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sel := headsArr[0]
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for i := 1; i < len(headsArr); i++ {
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cur := headsArr[i]
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yes, err := syncer.store.IsAncestorOf(cur, sel)
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if err != nil {
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return nil, err
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}
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if yes {
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continue
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}
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yes, err = syncer.store.IsAncestorOf(sel, cur)
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if err != nil {
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return nil, err
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}
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if yes {
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sel = cur
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continue
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}
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nca, err := syncer.store.NearestCommonAncestor(cur, sel)
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if err != nil {
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return nil, err
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}
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if sel.Height()-nca.Height() > ForkLengthThreshold {
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// TODO: handle this better than refusing to sync
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return nil, fmt.Errorf("Conflict exists in heads set")
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}
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if syncer.store.Weight(cur) > syncer.store.Weight(sel) {
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sel = cur
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}
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}
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return sel, nil
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}
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2019-07-26 04:54:22 +00:00
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func (syncer *Syncer) FetchTipSet(ctx context.Context, p peer.ID, cids []cid.Cid) (*store.FullTipSet, error) {
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2019-07-05 14:29:17 +00:00
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if fts, err := syncer.tryLoadFullTipSet(cids); err == nil {
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return fts, nil
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}
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2019-07-08 14:07:09 +00:00
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return syncer.Bsync.GetFullTipSet(ctx, p, cids)
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2019-07-05 14:29:17 +00:00
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}
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2019-07-26 04:54:22 +00:00
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func (syncer *Syncer) tryLoadFullTipSet(cids []cid.Cid) (*store.FullTipSet, error) {
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2019-07-05 14:29:17 +00:00
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ts, err := syncer.store.LoadTipSet(cids)
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if err != nil {
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return nil, err
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}
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2019-07-26 04:54:22 +00:00
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fts := &store.FullTipSet{}
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2019-07-05 14:29:17 +00:00
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for _, b := range ts.Blocks() {
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messages, err := syncer.store.MessagesForBlock(b)
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if err != nil {
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return nil, err
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}
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2019-07-25 22:15:03 +00:00
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fb := &types.FullBlock{
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2019-07-05 14:29:17 +00:00
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Header: b,
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Messages: messages,
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}
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fts.Blocks = append(fts.Blocks, fb)
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}
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return fts, nil
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}
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2019-07-30 16:39:07 +00:00
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func (syncer *Syncer) Sync(maybeHead *store.FullTipSet) error {
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2019-07-26 18:16:57 +00:00
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syncer.syncLock.Lock()
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defer syncer.syncLock.Unlock()
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2019-07-05 14:29:17 +00:00
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ts := maybeHead.TipSet()
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2019-07-05 14:46:21 +00:00
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if syncer.Genesis.Equals(ts) {
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2019-07-05 14:29:17 +00:00
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return nil
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}
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2019-07-31 07:13:49 +00:00
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if err := syncer.collectChain(maybeHead); err != nil {
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2019-07-05 14:29:17 +00:00
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return err
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}
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if err := syncer.store.PutTipSet(maybeHead); err != nil {
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return errors.Wrap(err, "failed to put synced tipset to chainstore")
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}
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2019-07-31 07:13:49 +00:00
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if syncer.store.Weight(maybeHead.TipSet()) > syncer.store.Weight(syncer.head) {
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fmt.Println("Accepted new head: ", maybeHead.Cids())
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syncer.head = maybeHead.TipSet()
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2019-07-05 14:29:17 +00:00
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}
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return nil
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}
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2019-07-26 19:01:02 +00:00
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func (syncer *Syncer) ValidateTipSet(ctx context.Context, fts *store.FullTipSet) error {
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2019-07-05 14:29:17 +00:00
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ts := fts.TipSet()
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2019-07-05 14:46:21 +00:00
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if ts.Equals(syncer.Genesis) {
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2019-07-05 14:29:17 +00:00
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return nil
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}
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for _, b := range fts.Blocks {
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2019-07-26 19:01:02 +00:00
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if err := syncer.ValidateBlock(ctx, b); err != nil {
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2019-07-05 14:29:17 +00:00
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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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2019-07-26 19:01:02 +00:00
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func (syncer *Syncer) ValidateBlock(ctx context.Context, b *types.FullBlock) error {
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2019-07-05 14:29:17 +00:00
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h := b.Header
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stateroot, err := syncer.store.TipSetState(h.Parents)
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if err != nil {
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log.Error("get tipsetstate failed: ", h.Height, h.Parents, err)
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return err
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}
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baseTs, err := syncer.store.LoadTipSet(b.Header.Parents)
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if err != nil {
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return err
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}
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2019-07-25 22:15:33 +00:00
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vmi, err := vm.NewVM(stateroot, b.Header.Height, b.Header.Miner, syncer.store)
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2019-07-05 14:29:17 +00:00
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if err != nil {
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return err
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}
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2019-07-25 22:15:33 +00:00
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if err := vmi.TransferFunds(actors.NetworkAddress, b.Header.Miner, vm.MiningRewardForBlock(baseTs)); err != nil {
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2019-07-05 14:29:17 +00:00
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return err
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}
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var receipts []interface{}
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for _, m := range b.Messages {
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2019-07-25 22:15:33 +00:00
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receipt, err := vmi.ApplyMessage(ctx, &m.Message)
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2019-07-05 14:29:17 +00:00
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if err != nil {
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return err
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}
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receipts = append(receipts, receipt)
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}
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2019-07-26 04:54:22 +00:00
|
|
|
cst := hamt.CSTFromBstore(syncer.store.Blockstore())
|
2019-07-05 14:29:17 +00:00
|
|
|
recptRoot, err := sharray.Build(context.TODO(), 4, receipts, cst)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
if recptRoot != b.Header.MessageReceipts {
|
|
|
|
return fmt.Errorf("receipts mismatched")
|
|
|
|
}
|
|
|
|
|
2019-07-25 22:15:33 +00:00
|
|
|
final, err := vmi.Flush(context.TODO())
|
2019-07-05 14:29:17 +00:00
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
if b.Header.StateRoot != final {
|
|
|
|
return fmt.Errorf("final state root does not match block")
|
|
|
|
}
|
|
|
|
|
|
|
|
return nil
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
func (syncer *Syncer) collectHeaders(from *types.TipSet, toHeight uint64) ([]*types.TipSet, error) {
|
|
|
|
blockSet := []*types.TipSet{from}
|
2019-07-05 14:29:17 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
at := from.Parents()
|
2019-07-05 14:29:17 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
// If, for some reason, we have a suffix of the chain locally, handle that here
|
|
|
|
for blockSet[len(blockSet)-1].Height() > toHeight {
|
|
|
|
log.Warn("syncing local: ", at)
|
|
|
|
ts, err := syncer.store.LoadTipSet(at)
|
|
|
|
if err != nil {
|
|
|
|
if err == bstore.ErrNotFound {
|
|
|
|
log.Info("tipset not found locally, starting sync: ", at)
|
|
|
|
break
|
|
|
|
}
|
|
|
|
log.Warn("loading local tipset: %s", err)
|
|
|
|
continue // TODO: verify
|
|
|
|
}
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
blockSet = append(blockSet, ts)
|
|
|
|
at = ts.Parents()
|
|
|
|
}
|
2019-07-26 16:13:25 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
for blockSet[len(blockSet)-1].Height() > toHeight {
|
|
|
|
// NB: GetBlocks validates that the blocks are in-fact the ones we
|
|
|
|
// requested, and that they are correctly linked to eachother. It does
|
|
|
|
// not validate any state transitions
|
|
|
|
fmt.Println("Get blocks")
|
|
|
|
blks, err := syncer.Bsync.GetBlocks(context.TODO(), at, 10)
|
|
|
|
if err != nil {
|
|
|
|
// Most likely our peers aren't fully synced yet, but forwarded
|
|
|
|
// new block message (ideally we'd find better peers)
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
log.Error("failed to get blocks: ", err)
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
// This error will only be logged above,
|
|
|
|
return nil, xerrors.Errorf("failed to get blocks: %w", err)
|
2019-07-30 13:55:36 +00:00
|
|
|
}
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
for _, b := range blks {
|
|
|
|
blockSet = append(blockSet, b)
|
|
|
|
}
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
at = blks[len(blks)-1].Parents()
|
|
|
|
}
|
2019-07-26 16:13:25 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
if toHeight == 0 {
|
|
|
|
// hacks. in the case that we request X blocks starting at height X+1, we
|
|
|
|
// won't get the Genesis block in the returned blockset. This hacks around it
|
|
|
|
if blockSet[len(blockSet)-1].Height() != 0 {
|
|
|
|
blockSet = append(blockSet, syncer.Genesis)
|
|
|
|
}
|
2019-07-26 16:13:25 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
blockSet = reverse(blockSet)
|
2019-07-26 16:13:25 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
genesis := blockSet[0]
|
|
|
|
if !genesis.Equals(syncer.Genesis) {
|
|
|
|
// TODO: handle this...
|
|
|
|
log.Errorf("We synced to the wrong chain! %s != %s", genesis, syncer.Genesis)
|
|
|
|
panic("We synced to the wrong chain")
|
2019-07-30 13:55:36 +00:00
|
|
|
}
|
2019-07-31 07:13:49 +00:00
|
|
|
}
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
return blockSet, nil
|
|
|
|
}
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
func (syncer *Syncer) syncMessagesAndCheckState(headers []*types.TipSet) error {
|
|
|
|
// Fetch all the messages for all the blocks in this chain
|
|
|
|
cur := headers[len(headers)-1]
|
2019-07-30 13:55:36 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
windowSize := uint64(10)
|
|
|
|
for i := uint64(0); i <= cur.Height(); i += windowSize {
|
|
|
|
ds := dstore.NewMapDatastore()
|
|
|
|
bs := bstore.NewBlockstore(ds)
|
|
|
|
cst := hamt.CSTFromBstore(bs)
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
nextHeight := i + windowSize - 1
|
|
|
|
if nextHeight > cur.Height() {
|
|
|
|
nextHeight = cur.Height()
|
2019-07-30 13:55:36 +00:00
|
|
|
}
|
2019-07-26 16:13:25 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
next := headers[nextHeight]
|
|
|
|
bstips, err := syncer.Bsync.GetChainMessages(context.TODO(), next, (nextHeight+1)-i)
|
|
|
|
if err != nil {
|
|
|
|
log.Errorf("failed to fetch messages: %s", err)
|
|
|
|
return xerrors.Errorf("message processing failed: %w", err)
|
|
|
|
}
|
2019-07-30 13:55:36 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
for bsi := 0; bsi < len(bstips); bsi++ {
|
|
|
|
this := headers[i+uint64(bsi)]
|
|
|
|
bstip := bstips[len(bstips)-(bsi+1)]
|
|
|
|
fts, err := zipTipSetAndMessages(cst, this, bstip.Messages, bstip.MsgIncludes)
|
2019-07-30 13:55:36 +00:00
|
|
|
if err != nil {
|
2019-07-31 07:13:49 +00:00
|
|
|
log.Error("zipping failed: ", err, bsi, i)
|
|
|
|
log.Error("height: ", this.Height())
|
|
|
|
log.Error("bstips: ", bstips)
|
|
|
|
log.Error("next height: ", nextHeight)
|
|
|
|
return xerrors.Errorf("message processing failed: %w", err)
|
2019-07-30 13:55:36 +00:00
|
|
|
}
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
if err := syncer.ValidateTipSet(context.TODO(), fts); err != nil {
|
|
|
|
log.Errorf("failed to validate tipset: %s", err)
|
|
|
|
return xerrors.Errorf("message processing failed: %w", err)
|
2019-07-30 13:55:36 +00:00
|
|
|
}
|
2019-07-31 07:13:49 +00:00
|
|
|
}
|
2019-07-26 18:16:57 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
for _, bst := range bstips {
|
|
|
|
for _, m := range bst.Messages {
|
|
|
|
switch m.Signature.Type {
|
|
|
|
case types.KTBLS:
|
|
|
|
//log.Infof("putting BLS message: %s", m.Cid())
|
|
|
|
if _, err := store.PutMessage(bs, &m.Message); err != nil {
|
2019-07-30 13:55:36 +00:00
|
|
|
log.Error("failed to persist messages: ", err)
|
2019-07-31 07:13:49 +00:00
|
|
|
return xerrors.Errorf("BLS message processing failed: %w", err)
|
2019-07-26 18:16:57 +00:00
|
|
|
}
|
2019-07-31 07:13:49 +00:00
|
|
|
case types.KTSecp256k1:
|
|
|
|
//log.Infof("putting secp256k1 message: %s", m.Cid())
|
|
|
|
if _, err := store.PutMessage(bs, m); err != nil {
|
|
|
|
log.Error("failed to persist messages: ", err)
|
|
|
|
return xerrors.Errorf("secp256k1 message processing failed: %w", err)
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
return xerrors.Errorf("unknown signature type on message %s: %q", m.Cid(), m.Signature.TypeCode)
|
2019-07-26 18:16:57 +00:00
|
|
|
}
|
|
|
|
}
|
2019-07-31 07:13:49 +00:00
|
|
|
}
|
2019-07-26 16:13:25 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
if err := copyBlockstore(bs, syncer.store.Blockstore()); err != nil {
|
|
|
|
return xerrors.Errorf("message processing failed: %w", err)
|
2019-07-05 14:29:17 +00:00
|
|
|
}
|
2019-07-31 07:13:49 +00:00
|
|
|
}
|
2019-07-05 14:29:17 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
return nil
|
|
|
|
}
|
2019-07-05 14:29:17 +00:00
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
func (syncer *Syncer) collectChain(fts *store.FullTipSet) error {
|
|
|
|
curHeight := syncer.head.Height()
|
|
|
|
|
|
|
|
headers, err := syncer.collectHeaders(fts.TipSet(), curHeight)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
for _, ts := range headers {
|
|
|
|
for _, b := range ts.Blocks() {
|
|
|
|
if err := syncer.store.PersistBlockHeader(b); err != nil {
|
|
|
|
return xerrors.Errorf("failed to persist synced blocks to the chainstore: %w", err)
|
|
|
|
}
|
2019-07-30 13:55:36 +00:00
|
|
|
}
|
2019-07-05 14:29:17 +00:00
|
|
|
}
|
|
|
|
|
2019-07-31 07:13:49 +00:00
|
|
|
if err := syncer.syncMessagesAndCheckState(headers); err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
return nil
|
2019-07-05 14:36:08 +00:00
|
|
|
}
|