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sync.go
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sync.go
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package chain
import (
"bytes"
"context"
"errors"
"fmt"
"os"
"sort"
"strings"
"sync"
"time"
"github.com/filecoin-project/lotus/chain/actors/builtin"
"github.com/filecoin-project/lotus/node/modules/dtypes"
"github.com/Gurpartap/async"
"github.com/hashicorp/go-multierror"
blocks "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid"
cbor "github.com/ipfs/go-ipld-cbor"
logging "github.com/ipfs/go-log/v2"
"github.com/libp2p/go-libp2p-core/connmgr"
"github.com/libp2p/go-libp2p-core/peer"
cbg "github.com/whyrusleeping/cbor-gen"
"github.com/whyrusleeping/pubsub"
"go.opencensus.io/stats"
"go.opencensus.io/trace"
"golang.org/x/xerrors"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-state-types/abi"
"github.com/filecoin-project/go-state-types/crypto"
"github.com/filecoin-project/go-state-types/network"
"github.com/filecoin-project/lotus/extern/sector-storage/ffiwrapper"
ffi "github.com/filecoin-project/filecoin-ffi"
// named msgarray here to make it clear that these are the types used by
// messages, regardless of specs-actors version.
blockadt "github.com/filecoin-project/specs-actors/actors/util/adt"
proof2 "github.com/filecoin-project/specs-actors/v2/actors/runtime/proof"
"github.com/filecoin-project/lotus/api"
bstore "github.com/filecoin-project/lotus/blockstore"
"github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/chain/actors/builtin/power"
"github.com/filecoin-project/lotus/chain/beacon"
"github.com/filecoin-project/lotus/chain/exchange"
"github.com/filecoin-project/lotus/chain/gen"
"github.com/filecoin-project/lotus/chain/state"
"github.com/filecoin-project/lotus/chain/stmgr"
"github.com/filecoin-project/lotus/chain/store"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/chain/vm"
"github.com/filecoin-project/lotus/lib/sigs"
"github.com/filecoin-project/lotus/metrics"
)
// Blocks that are more than MaxHeightDrift epochs above
// the theoretical max height based on systime are quickly rejected
const MaxHeightDrift = 5
var (
// LocalIncoming is the _local_ pubsub (unrelated to libp2p pubsub) topic
// where the Syncer publishes candidate chain heads to be synced.
LocalIncoming = "incoming"
log = logging.Logger("chain")
concurrentSyncRequests = exchange.ShufflePeersPrefix
syncRequestBatchSize = 8
syncRequestRetries = 5
)
// Syncer is in charge of running the chain synchronization logic. As such, it
// is tasked with these functions, amongst others:
//
// * Fast-forwards the chain as it learns of new TipSets from the network via
// the SyncManager.
// * Applies the fork choice rule to select the correct side when confronted
// with a fork in the network.
// * Requests block headers and messages from other peers when not available
// in our BlockStore.
// * Tracks blocks marked as bad in a cache.
// * Keeps the BlockStore and ChainStore consistent with our view of the world,
// the latter of which in turn informs other components when a reorg has been
// committed.
//
// The Syncer does not run workers itself. It's mainly concerned with
// ensuring a consistent state of chain consensus. The reactive and network-
// interfacing processes are part of other components, such as the SyncManager
// (which owns the sync scheduler and sync workers), ChainExchange, the HELLO
// protocol, and the gossipsub block propagation layer.
//
// {hint/concept} The fork-choice rule as it currently stands is: "pick the
// chain with the heaviest weight, so long as it hasn’t deviated one finality
// threshold from our head (900 epochs, parameter determined by spec-actors)".
type Syncer struct {
// The interface for accessing and putting tipsets into local storage
store *store.ChainStore
// handle to the random beacon for verification
beacon beacon.Schedule
// the state manager handles making state queries
sm *stmgr.StateManager
// The known Genesis tipset
Genesis *types.TipSet
// TipSets known to be invalid
bad *BadBlockCache
// handle to the block sync service
Exchange exchange.Client
self peer.ID
syncmgr SyncManager
connmgr connmgr.ConnManager
incoming *pubsub.PubSub
receiptTracker *blockReceiptTracker
verifier ffiwrapper.Verifier
tickerCtxCancel context.CancelFunc
checkptLk sync.Mutex
checkpt types.TipSetKey
ds dtypes.MetadataDS
}
type SyncManagerCtor func(syncFn SyncFunc) SyncManager
// NewSyncer creates a new Syncer object.
func NewSyncer(ds dtypes.MetadataDS, sm *stmgr.StateManager, exchange exchange.Client, syncMgrCtor SyncManagerCtor, connmgr connmgr.ConnManager, self peer.ID, beacon beacon.Schedule, verifier ffiwrapper.Verifier) (*Syncer, error) {
gen, err := sm.ChainStore().GetGenesis()
if err != nil {
return nil, xerrors.Errorf("getting genesis block: %w", err)
}
gent, err := types.NewTipSet([]*types.BlockHeader{gen})
if err != nil {
return nil, err
}
cp, err := loadCheckpoint(ds)
if err != nil {
return nil, xerrors.Errorf("error loading mpool config: %w", err)
}
s := &Syncer{
ds: ds,
checkpt: cp,
beacon: beacon,
bad: NewBadBlockCache(),
Genesis: gent,
Exchange: exchange,
store: sm.ChainStore(),
sm: sm,
self: self,
receiptTracker: newBlockReceiptTracker(),
connmgr: connmgr,
verifier: verifier,
incoming: pubsub.New(50),
}
if build.InsecurePoStValidation {
log.Warn("*********************************************************************************************")
log.Warn(" [INSECURE-POST-VALIDATION] Insecure test validation is enabled. If you see this outside of a test, it is a severe bug! ")
log.Warn("*********************************************************************************************")
}
s.syncmgr = syncMgrCtor(s.Sync)
return s, nil
}
func (syncer *Syncer) Start() {
tickerCtx, tickerCtxCancel := context.WithCancel(context.Background())
syncer.syncmgr.Start()
syncer.tickerCtxCancel = tickerCtxCancel
go syncer.runMetricsTricker(tickerCtx)
}
func (syncer *Syncer) runMetricsTricker(tickerCtx context.Context) {
genesisTime := time.Unix(int64(syncer.Genesis.MinTimestamp()), 0)
ticker := build.Clock.Ticker(time.Duration(build.BlockDelaySecs) * time.Second)
defer ticker.Stop()
for {
select {
case <-ticker.C:
sinceGenesis := build.Clock.Now().Sub(genesisTime)
expectedHeight := int64(sinceGenesis.Seconds()) / int64(build.BlockDelaySecs)
stats.Record(tickerCtx, metrics.ChainNodeHeightExpected.M(expectedHeight))
case <-tickerCtx.Done():
return
}
}
}
func (syncer *Syncer) Stop() {
syncer.syncmgr.Stop()
syncer.tickerCtxCancel()
}
// InformNewHead informs the syncer about a new potential tipset
// This should be called when connecting to new peers, and additionally
// when receiving new blocks from the network
func (syncer *Syncer) InformNewHead(from peer.ID, fts *store.FullTipSet) bool {
defer func() {
if err := recover(); err != nil {
log.Errorf("panic in InformNewHead: ", err)
}
}()
ctx := context.Background()
if fts == nil {
log.Errorf("got nil tipset in InformNewHead")
return false
}
if syncer.IsEpochBeyondCurrMax(fts.TipSet().Height()) {
log.Errorf("Received block with impossibly large height %d", fts.TipSet().Height())
return false
}
for _, b := range fts.Blocks {
if reason, ok := syncer.bad.Has(b.Cid()); ok {
log.Warnf("InformNewHead called on block marked as bad: %s (reason: %s)", b.Cid(), reason)
return false
}
if err := syncer.ValidateMsgMeta(b); err != nil {
log.Warnf("invalid block received: %s", err)
return false
}
}
syncer.incoming.Pub(fts.TipSet().Blocks(), LocalIncoming)
// TODO: IMPORTANT(GARBAGE) this needs to be put in the 'temporary' side of
// the blockstore
if err := syncer.store.PersistBlockHeaders(fts.TipSet().Blocks()...); err != nil {
log.Warn("failed to persist incoming block header: ", err)
return false
}
syncer.Exchange.AddPeer(from)
hts := syncer.store.GetHeaviestTipSet()
bestPweight := hts.ParentWeight()
targetWeight := fts.TipSet().ParentWeight()
if targetWeight.LessThan(bestPweight) {
var miners []string
for _, blk := range fts.TipSet().Blocks() {
miners = append(miners, blk.Miner.String())
}
log.Debugw("incoming tipset does not appear to be better than our best chain, ignoring for now", "miners", miners, "bestPweight", bestPweight, "bestTS", hts.Cids(), "incomingWeight", targetWeight, "incomingTS", fts.TipSet().Cids())
return false
}
syncer.syncmgr.SetPeerHead(ctx, from, fts.TipSet())
return true
}
// IncomingBlocks spawns a goroutine that subscribes to the local eventbus to
// receive new block headers as they arrive from the network, and sends them to
// the returned channel.
//
// These blocks have not necessarily been incorporated to our view of the chain.
func (syncer *Syncer) IncomingBlocks(ctx context.Context) (<-chan *types.BlockHeader, error) {
sub := syncer.incoming.Sub(LocalIncoming)
out := make(chan *types.BlockHeader, 10)
go func() {
defer syncer.incoming.Unsub(sub, LocalIncoming)
for {
select {
case r := <-sub:
hs := r.([]*types.BlockHeader)
for _, h := range hs {
select {
case out <- h:
case <-ctx.Done():
return
}
}
case <-ctx.Done():
return
}
}
}()
return out, nil
}
// ValidateMsgMeta performs structural and content hash validation of the
// messages within this block. If validation passes, it stores the messages in
// the underlying IPLD block store.
func (syncer *Syncer) ValidateMsgMeta(fblk *types.FullBlock) error {
if msgc := len(fblk.BlsMessages) + len(fblk.SecpkMessages); msgc > build.BlockMessageLimit {
return xerrors.Errorf("block %s has too many messages (%d)", fblk.Header.Cid(), msgc)
}
// TODO: IMPORTANT(GARBAGE). These message puts and the msgmeta
// computation need to go into the 'temporary' side of the blockstore when
// we implement that
// We use a temporary bstore here to avoid writing intermediate pieces
// into the blockstore.
blockstore := bstore.NewMemory()
cst := cbor.NewCborStore(blockstore)
var bcids, scids []cid.Cid
for _, m := range fblk.BlsMessages {
c, err := store.PutMessage(blockstore, m)
if err != nil {
return xerrors.Errorf("putting bls message to blockstore after msgmeta computation: %w", err)
}
bcids = append(bcids, c)
}
for _, m := range fblk.SecpkMessages {
c, err := store.PutMessage(blockstore, m)
if err != nil {
return xerrors.Errorf("putting bls message to blockstore after msgmeta computation: %w", err)
}
scids = append(scids, c)
}
// Compute the root CID of the combined message trie.
smroot, err := computeMsgMeta(cst, bcids, scids)
if err != nil {
return xerrors.Errorf("validating msgmeta, compute failed: %w", err)
}
// Check that the message trie root matches with what's in the block.
if fblk.Header.Messages != smroot {
return xerrors.Errorf("messages in full block did not match msgmeta root in header (%s != %s)", fblk.Header.Messages, smroot)
}
// Finally, flush.
return vm.Copy(context.TODO(), blockstore, syncer.store.ChainBlockstore(), smroot)
}
func (syncer *Syncer) LocalPeer() peer.ID {
return syncer.self
}
func (syncer *Syncer) ChainStore() *store.ChainStore {
return syncer.store
}
func (syncer *Syncer) InformNewBlock(from peer.ID, blk *types.FullBlock) bool {
// TODO: search for other blocks that could form a tipset with this block
// and then send that tipset to InformNewHead
fts := &store.FullTipSet{Blocks: []*types.FullBlock{blk}}
return syncer.InformNewHead(from, fts)
}
func copyBlockstore(ctx context.Context, from, to bstore.Blockstore) error {
ctx, span := trace.StartSpan(ctx, "copyBlockstore")
defer span.End()
cids, err := from.AllKeysChan(ctx)
if err != nil {
return err
}
// TODO: should probably expose better methods on the blockstore for this operation
var blks []blocks.Block
for c := range cids {
b, err := from.Get(c)
if err != nil {
return err
}
blks = append(blks, b)
}
if err := to.PutMany(blks); err != nil {
return err
}
return nil
}
// TODO: this function effectively accepts unchecked input from the network,
// either validate it here, or ensure that its validated elsewhere (maybe make
// sure the blocksync code checks it?)
// maybe this code should actually live in blocksync??
func zipTipSetAndMessages(bs cbor.IpldStore, ts *types.TipSet, allbmsgs []*types.Message, allsmsgs []*types.SignedMessage, bmi, smi [][]uint64) (*store.FullTipSet, error) {
if len(ts.Blocks()) != len(smi) || len(ts.Blocks()) != len(bmi) {
return nil, fmt.Errorf("msgincl length didnt match tipset size")
}
fts := &store.FullTipSet{}
for bi, b := range ts.Blocks() {
if msgc := len(bmi[bi]) + len(smi[bi]); msgc > build.BlockMessageLimit {
return nil, fmt.Errorf("block %q has too many messages (%d)", b.Cid(), msgc)
}
var smsgs []*types.SignedMessage
var smsgCids []cid.Cid
for _, m := range smi[bi] {
smsgs = append(smsgs, allsmsgs[m])
smsgCids = append(smsgCids, allsmsgs[m].Cid())
}
var bmsgs []*types.Message
var bmsgCids []cid.Cid
for _, m := range bmi[bi] {
bmsgs = append(bmsgs, allbmsgs[m])
bmsgCids = append(bmsgCids, allbmsgs[m].Cid())
}
mrcid, err := computeMsgMeta(bs, bmsgCids, smsgCids)
if err != nil {
return nil, err
}
if b.Messages != mrcid {
return nil, fmt.Errorf("messages didnt match message root in header for ts %s", ts.Key())
}
fb := &types.FullBlock{
Header: b,
BlsMessages: bmsgs,
SecpkMessages: smsgs,
}
fts.Blocks = append(fts.Blocks, fb)
}
return fts, nil
}
// computeMsgMeta computes the root CID of the combined arrays of message CIDs
// of both types (BLS and Secpk).
func computeMsgMeta(bs cbor.IpldStore, bmsgCids, smsgCids []cid.Cid) (cid.Cid, error) {
// block headers use adt0
store := blockadt.WrapStore(context.TODO(), bs)
bmArr := blockadt.MakeEmptyArray(store)
smArr := blockadt.MakeEmptyArray(store)
for i, m := range bmsgCids {
c := cbg.CborCid(m)
if err := bmArr.Set(uint64(i), &c); err != nil {
return cid.Undef, err
}
}
for i, m := range smsgCids {
c := cbg.CborCid(m)
if err := smArr.Set(uint64(i), &c); err != nil {
return cid.Undef, err
}
}
bmroot, err := bmArr.Root()
if err != nil {
return cid.Undef, err
}
smroot, err := smArr.Root()
if err != nil {
return cid.Undef, err
}
mrcid, err := store.Put(store.Context(), &types.MsgMeta{
BlsMessages: bmroot,
SecpkMessages: smroot,
})
if err != nil {
return cid.Undef, xerrors.Errorf("failed to put msgmeta: %w", err)
}
return mrcid, nil
}
// FetchTipSet tries to load the provided tipset from the store, and falls back
// to the network (client) by querying the supplied peer if not found
// locally.
//
// {hint/usage} This is used from the HELLO protocol, to fetch the greeting
// peer's heaviest tipset if we don't have it.
func (syncer *Syncer) FetchTipSet(ctx context.Context, p peer.ID, tsk types.TipSetKey) (*store.FullTipSet, error) {
if fts, err := syncer.tryLoadFullTipSet(tsk); err == nil {
return fts, nil
}
// fall back to the network.
return syncer.Exchange.GetFullTipSet(ctx, p, tsk)
}
// tryLoadFullTipSet queries the tipset in the ChainStore, and returns a full
// representation of it containing FullBlocks. If ALL blocks are not found
// locally, it errors entirely with blockstore.ErrNotFound.
func (syncer *Syncer) tryLoadFullTipSet(tsk types.TipSetKey) (*store.FullTipSet, error) {
ts, err := syncer.store.LoadTipSet(tsk)
if err != nil {
return nil, err
}
fts := &store.FullTipSet{}
for _, b := range ts.Blocks() {
bmsgs, smsgs, err := syncer.store.MessagesForBlock(b)
if err != nil {
return nil, err
}
fb := &types.FullBlock{
Header: b,
BlsMessages: bmsgs,
SecpkMessages: smsgs,
}
fts.Blocks = append(fts.Blocks, fb)
}
return fts, nil
}
// Sync tries to advance our view of the chain to `maybeHead`. It does nothing
// if our current head is heavier than the requested tipset, or if we're already
// at the requested head, or if the head is the genesis.
//
// Most of the heavy-lifting logic happens in syncer#collectChain. Refer to the
// godocs on that method for a more detailed view.
func (syncer *Syncer) Sync(ctx context.Context, maybeHead *types.TipSet) error {
ctx, span := trace.StartSpan(ctx, "chain.Sync")
defer span.End()
if span.IsRecordingEvents() {
span.AddAttributes(
trace.StringAttribute("tipset", fmt.Sprint(maybeHead.Cids())),
trace.Int64Attribute("height", int64(maybeHead.Height())),
)
}
hts := syncer.store.GetHeaviestTipSet()
if hts.ParentWeight().GreaterThan(maybeHead.ParentWeight()) {
return nil
}
if syncer.Genesis.Equals(maybeHead) || hts.Equals(maybeHead) {
return nil
}
if err := syncer.collectChain(ctx, maybeHead, hts); err != nil {
span.AddAttributes(trace.StringAttribute("col_error", err.Error()))
span.SetStatus(trace.Status{
Code: 13,
Message: err.Error(),
})
return xerrors.Errorf("collectChain failed: %w", err)
}
// At this point we have accepted and synced to the new `maybeHead`
// (`StageSyncComplete`).
if err := syncer.store.PutTipSet(ctx, maybeHead); err != nil {
span.AddAttributes(trace.StringAttribute("put_error", err.Error()))
span.SetStatus(trace.Status{
Code: 13,
Message: err.Error(),
})
return xerrors.Errorf("failed to put synced tipset to chainstore: %w", err)
}
peers := syncer.receiptTracker.GetPeers(maybeHead)
if len(peers) > 0 {
syncer.connmgr.TagPeer(peers[0], "new-block", 40)
for _, p := range peers[1:] {
syncer.connmgr.TagPeer(p, "new-block", 25)
}
}
return nil
}
func isPermanent(err error) bool {
return !errors.Is(err, ErrTemporal)
}
func (syncer *Syncer) ValidateTipSet(ctx context.Context, fts *store.FullTipSet, useCache bool) error {
ctx, span := trace.StartSpan(ctx, "validateTipSet")
defer span.End()
span.AddAttributes(trace.Int64Attribute("height", int64(fts.TipSet().Height())))
ts := fts.TipSet()
if ts.Equals(syncer.Genesis) {
return nil
}
var futures []async.ErrorFuture
for _, b := range fts.Blocks {
b := b // rebind to a scoped variable
futures = append(futures, async.Err(func() error {
if err := syncer.ValidateBlock(ctx, b, useCache); err != nil {
if isPermanent(err) {
syncer.bad.Add(b.Cid(), NewBadBlockReason([]cid.Cid{b.Cid()}, err.Error()))
}
return xerrors.Errorf("validating block %s: %w", b.Cid(), err)
}
if err := syncer.sm.ChainStore().AddToTipSetTracker(b.Header); err != nil {
return xerrors.Errorf("failed to add validated header to tipset tracker: %w", err)
}
return nil
}))
}
for _, f := range futures {
if err := f.AwaitContext(ctx); err != nil {
return err
}
}
return nil
}
func (syncer *Syncer) minerIsValid(ctx context.Context, maddr address.Address, baseTs *types.TipSet) error {
act, err := syncer.sm.LoadActor(ctx, power.Address, baseTs)
if err != nil {
return xerrors.Errorf("failed to load power actor: %w", err)
}
powState, err := power.Load(syncer.store.ActorStore(ctx), act)
if err != nil {
return xerrors.Errorf("failed to load power actor state: %w", err)
}
_, exist, err := powState.MinerPower(maddr)
if err != nil {
return xerrors.Errorf("failed to look up miner's claim: %w", err)
}
if !exist {
return xerrors.New("miner isn't valid")
}
return nil
}
var ErrTemporal = errors.New("temporal error")
func blockSanityChecks(h *types.BlockHeader) error {
if h.ElectionProof == nil {
return xerrors.Errorf("block cannot have nil election proof")
}
if h.Ticket == nil {
return xerrors.Errorf("block cannot have nil ticket")
}
if h.BlockSig == nil {
return xerrors.Errorf("block had nil signature")
}
if h.BLSAggregate == nil {
return xerrors.Errorf("block had nil bls aggregate signature")
}
if h.Miner.Protocol() != address.ID {
return xerrors.Errorf("block had non-ID miner address")
}
return nil
}
// ValidateBlock should match up with 'Semantical Validation' in validation.md in the spec
func (syncer *Syncer) ValidateBlock(ctx context.Context, b *types.FullBlock, useCache bool) (err error) {
defer func() {
// b.Cid() could panic for empty blocks that are used in tests.
if rerr := recover(); rerr != nil {
err = xerrors.Errorf("validate block panic: %w", rerr)
return
}
}()
if useCache {
isValidated, err := syncer.store.IsBlockValidated(ctx, b.Cid())
if err != nil {
return xerrors.Errorf("check block validation cache %s: %w", b.Cid(), err)
}
if isValidated {
return nil
}
}
validationStart := build.Clock.Now()
defer func() {
stats.Record(ctx, metrics.BlockValidationDurationMilliseconds.M(metrics.SinceInMilliseconds(validationStart)))
log.Infow("block validation", "took", time.Since(validationStart), "height", b.Header.Height, "age", time.Since(time.Unix(int64(b.Header.Timestamp), 0)))
}()
ctx, span := trace.StartSpan(ctx, "validateBlock")
defer span.End()
if err := blockSanityChecks(b.Header); err != nil {
return xerrors.Errorf("incoming header failed basic sanity checks: %w", err)
}
h := b.Header
baseTs, err := syncer.store.LoadTipSet(types.NewTipSetKey(h.Parents...))
if err != nil {
return xerrors.Errorf("load parent tipset failed (%s): %w", h.Parents, err)
}
winPoStNv := syncer.sm.GetNtwkVersion(ctx, baseTs.Height())
lbts, lbst, err := stmgr.GetLookbackTipSetForRound(ctx, syncer.sm, baseTs, h.Height)
if err != nil {
return xerrors.Errorf("failed to get lookback tipset for block: %w", err)
}
prevBeacon, err := syncer.store.GetLatestBeaconEntry(baseTs)
if err != nil {
return xerrors.Errorf("failed to get latest beacon entry: %w", err)
}
// fast checks first
nulls := h.Height - (baseTs.Height() + 1)
if tgtTs := baseTs.MinTimestamp() + build.BlockDelaySecs*uint64(nulls+1); h.Timestamp != tgtTs {
return xerrors.Errorf("block has wrong timestamp: %d != %d", h.Timestamp, tgtTs)
}
now := uint64(build.Clock.Now().Unix())
if h.Timestamp > now+build.AllowableClockDriftSecs {
return xerrors.Errorf("block was from the future (now=%d, blk=%d): %w", now, h.Timestamp, ErrTemporal)
}
if h.Timestamp > now {
log.Warn("Got block from the future, but within threshold", h.Timestamp, build.Clock.Now().Unix())
}
msgsCheck := async.Err(func() error {
if b.Cid() == build.WhitelistedBlock {
return nil
}
if err := syncer.checkBlockMessages(ctx, b, baseTs); err != nil {
return xerrors.Errorf("block had invalid messages: %w", err)
}
return nil
})
minerCheck := async.Err(func() error {
if err := syncer.minerIsValid(ctx, h.Miner, baseTs); err != nil {
return xerrors.Errorf("minerIsValid failed: %w", err)
}
return nil
})
baseFeeCheck := async.Err(func() error {
baseFee, err := syncer.store.ComputeBaseFee(ctx, baseTs)
if err != nil {
return xerrors.Errorf("computing base fee: %w", err)
}
if types.BigCmp(baseFee, b.Header.ParentBaseFee) != 0 {
return xerrors.Errorf("base fee doesn't match: %s (header) != %s (computed)",
b.Header.ParentBaseFee, baseFee)
}
return nil
})
pweight, err := syncer.store.Weight(ctx, baseTs)
if err != nil {
return xerrors.Errorf("getting parent weight: %w", err)
}
if types.BigCmp(pweight, b.Header.ParentWeight) != 0 {
return xerrors.Errorf("parrent weight different: %s (header) != %s (computed)",
b.Header.ParentWeight, pweight)
}
stateRootCheck := async.Err(func() error {
stateroot, precp, err := syncer.sm.TipSetState(ctx, baseTs)
if err != nil {
return xerrors.Errorf("get tipsetstate(%d, %s) failed: %w", h.Height, h.Parents, err)
}
if stateroot != h.ParentStateRoot {
msgs, err := syncer.store.MessagesForTipset(baseTs)
if err != nil {
log.Error("failed to load messages for tipset during tipset state mismatch error: ", err)
} else {
log.Warn("Messages for tipset with mismatching state:")
for i, m := range msgs {
mm := m.VMMessage()
log.Warnf("Message[%d]: from=%s to=%s method=%d params=%x", i, mm.From, mm.To, mm.Method, mm.Params)
}
}
return xerrors.Errorf("parent state root did not match computed state (%s != %s)", stateroot, h.ParentStateRoot)
}
if precp != h.ParentMessageReceipts {
return xerrors.Errorf("parent receipts root did not match computed value (%s != %s)", precp, h.ParentMessageReceipts)
}
return nil
})
// Stuff that needs worker address
waddr, err := stmgr.GetMinerWorkerRaw(ctx, syncer.sm, lbst, h.Miner)
if err != nil {
return xerrors.Errorf("GetMinerWorkerRaw failed: %w", err)
}
winnerCheck := async.Err(func() error {
if h.ElectionProof.WinCount < 1 {
return xerrors.Errorf("block is not claiming to be a winner")
}
eligible, err := stmgr.MinerEligibleToMine(ctx, syncer.sm, h.Miner, baseTs, lbts)
if err != nil {
return xerrors.Errorf("determining if miner has min power failed: %w", err)
}
if !eligible {
return xerrors.New("block's miner is ineligible to mine")
}
rBeacon := *prevBeacon
if len(h.BeaconEntries) != 0 {
rBeacon = h.BeaconEntries[len(h.BeaconEntries)-1]
}
buf := new(bytes.Buffer)
if err := h.Miner.MarshalCBOR(buf); err != nil {
return xerrors.Errorf("failed to marshal miner address to cbor: %w", err)
}
vrfBase, err := store.DrawRandomness(rBeacon.Data, crypto.DomainSeparationTag_ElectionProofProduction, h.Height, buf.Bytes())
if err != nil {
return xerrors.Errorf("could not draw randomness: %w", err)
}
if err := VerifyElectionPoStVRF(ctx, waddr, vrfBase, h.ElectionProof.VRFProof); err != nil {
return xerrors.Errorf("validating block election proof failed: %w", err)
}
slashed, err := stmgr.GetMinerSlashed(ctx, syncer.sm, baseTs, h.Miner)
if err != nil {
return xerrors.Errorf("failed to check if block miner was slashed: %w", err)
}
if slashed {
return xerrors.Errorf("received block was from slashed or invalid miner")
}
mpow, tpow, _, err := stmgr.GetPowerRaw(ctx, syncer.sm, lbst, h.Miner)
if err != nil {
return xerrors.Errorf("failed getting power: %w", err)
}
j := h.ElectionProof.ComputeWinCount(mpow.QualityAdjPower, tpow.QualityAdjPower)
if h.ElectionProof.WinCount != j {
return xerrors.Errorf("miner claims wrong number of wins: miner: %d, computed: %d", h.ElectionProof.WinCount, j)
}
return nil
})
blockSigCheck := async.Err(func() error {
if err := sigs.CheckBlockSignature(ctx, h, waddr); err != nil {
return xerrors.Errorf("check block signature failed: %w", err)
}
return nil
})
beaconValuesCheck := async.Err(func() error {
if os.Getenv("LOTUS_IGNORE_DRAND") == "_yes_" {
return nil
}
if err := beacon.ValidateBlockValues(syncer.beacon, h, baseTs.Height(), *prevBeacon); err != nil {
return xerrors.Errorf("failed to validate blocks random beacon values: %w", err)
}
return nil
})
tktsCheck := async.Err(func() error {
buf := new(bytes.Buffer)
if err := h.Miner.MarshalCBOR(buf); err != nil {
return xerrors.Errorf("failed to marshal miner address to cbor: %w", err)
}
if h.Height > build.UpgradeSmokeHeight {
buf.Write(baseTs.MinTicket().VRFProof)
}
beaconBase := *prevBeacon
if len(h.BeaconEntries) != 0 {
beaconBase = h.BeaconEntries[len(h.BeaconEntries)-1]
}
vrfBase, err := store.DrawRandomness(beaconBase.Data, crypto.DomainSeparationTag_TicketProduction, h.Height-build.TicketRandomnessLookback, buf.Bytes())
if err != nil {
return xerrors.Errorf("failed to compute vrf base for ticket: %w", err)
}
err = VerifyElectionPoStVRF(ctx, waddr, vrfBase, h.Ticket.VRFProof)
if err != nil {
return xerrors.Errorf("validating block tickets failed: %w", err)
}
return nil
})
wproofCheck := async.Err(func() error {
if err := syncer.VerifyWinningPoStProof(ctx, winPoStNv, h, *prevBeacon, lbst, waddr); err != nil {
return xerrors.Errorf("invalid election post: %w", err)
}
return nil
})
await := []async.ErrorFuture{
minerCheck,
tktsCheck,
blockSigCheck,
beaconValuesCheck,
wproofCheck,
winnerCheck,
msgsCheck,
baseFeeCheck,
stateRootCheck,
}
var merr error
for _, fut := range await {
if err := fut.AwaitContext(ctx); err != nil {
merr = multierror.Append(merr, err)
}
}
if merr != nil {
mulErr := merr.(*multierror.Error)
mulErr.ErrorFormat = func(es []error) string {
if len(es) == 1 {
return fmt.Sprintf("1 error occurred:\n\t* %+v\n\n", es[0])
}
points := make([]string, len(es))
for i, err := range es {
points[i] = fmt.Sprintf("* %+v", err)
}
return fmt.Sprintf(
"%d errors occurred:\n\t%s\n\n",
len(es), strings.Join(points, "\n\t"))
}
return mulErr
}
if useCache {
if err := syncer.store.MarkBlockAsValidated(ctx, b.Cid()); err != nil {
return xerrors.Errorf("caching block validation %s: %w", b.Cid(), err)
}
}
return nil
}
func (syncer *Syncer) VerifyWinningPoStProof(ctx context.Context, nv network.Version, h *types.BlockHeader, prevBeacon types.BeaconEntry, lbst cid.Cid, waddr address.Address) error {
if build.InsecurePoStValidation {
if len(h.WinPoStProof) == 0 {
return xerrors.Errorf("[INSECURE-POST-VALIDATION] No winning post proof given")
}
if string(h.WinPoStProof[0].ProofBytes) == "valid proof" {
return nil
}
return xerrors.Errorf("[INSECURE-POST-VALIDATION] winning post was invalid")
}
buf := new(bytes.Buffer)
if err := h.Miner.MarshalCBOR(buf); err != nil {
return xerrors.Errorf("failed to marshal miner address: %w", err)
}
rbase := prevBeacon
if len(h.BeaconEntries) > 0 {
rbase = h.BeaconEntries[len(h.BeaconEntries)-1]
}
rand, err := store.DrawRandomness(rbase.Data, crypto.DomainSeparationTag_WinningPoStChallengeSeed, h.Height, buf.Bytes())