defeba5576
We need to compute the ticket based on our worker key from the lookback epoch, not the current epoch.
539 lines
14 KiB
Go
539 lines
14 KiB
Go
package miner
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import (
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"bytes"
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"context"
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"crypto/rand"
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"encoding/binary"
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"fmt"
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"sync"
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"time"
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proof2 "github.com/filecoin-project/specs-actors/v2/actors/runtime/proof"
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"github.com/filecoin-project/lotus/chain/gen/slashfilter"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/go-state-types/abi"
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"github.com/filecoin-project/go-state-types/crypto"
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lru "github.com/hashicorp/golang-lru"
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"github.com/filecoin-project/lotus/api"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/chain/gen"
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"github.com/filecoin-project/lotus/chain/messagepool/gasguess"
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"github.com/filecoin-project/lotus/chain/store"
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"github.com/filecoin-project/lotus/chain/types"
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"github.com/filecoin-project/lotus/journal"
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logging "github.com/ipfs/go-log/v2"
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"go.opencensus.io/trace"
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"golang.org/x/xerrors"
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)
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var log = logging.Logger("miner")
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// Journal event types.
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const (
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evtTypeBlockMined = iota
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)
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// returns a callback reporting whether we mined a blocks in this round
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type waitFunc func(ctx context.Context, baseTime uint64) (func(bool, abi.ChainEpoch, error), abi.ChainEpoch, error)
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func randTimeOffset(width time.Duration) time.Duration {
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buf := make([]byte, 8)
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rand.Reader.Read(buf) //nolint:errcheck
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val := time.Duration(binary.BigEndian.Uint64(buf) % uint64(width))
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return val - (width / 2)
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}
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func NewMiner(api api.FullNode, epp gen.WinningPoStProver, addr address.Address, sf *slashfilter.SlashFilter, j journal.Journal) *Miner {
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arc, err := lru.NewARC(10000)
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if err != nil {
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panic(err)
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}
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return &Miner{
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api: api,
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epp: epp,
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address: addr,
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waitFunc: func(ctx context.Context, baseTime uint64) (func(bool, abi.ChainEpoch, error), abi.ChainEpoch, error) {
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// Wait around for half the block time in case other parents come in
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deadline := baseTime + build.PropagationDelaySecs
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baseT := time.Unix(int64(deadline), 0)
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baseT = baseT.Add(randTimeOffset(time.Second))
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build.Clock.Sleep(build.Clock.Until(baseT))
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return func(bool, abi.ChainEpoch, error) {}, 0, nil
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},
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sf: sf,
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minedBlockHeights: arc,
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evtTypes: [...]journal.EventType{
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evtTypeBlockMined: j.RegisterEventType("miner", "block_mined"),
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},
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journal: j,
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}
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}
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type Miner struct {
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api api.FullNode
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epp gen.WinningPoStProver
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lk sync.Mutex
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address address.Address
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stop chan struct{}
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stopping chan struct{}
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waitFunc waitFunc
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lastWork *MiningBase
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sf *slashfilter.SlashFilter
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minedBlockHeights *lru.ARCCache
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evtTypes [1]journal.EventType
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journal journal.Journal
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}
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func (m *Miner) Address() address.Address {
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m.lk.Lock()
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defer m.lk.Unlock()
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return m.address
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}
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func (m *Miner) Start(ctx context.Context) error {
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m.lk.Lock()
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defer m.lk.Unlock()
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if m.stop != nil {
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return fmt.Errorf("miner already started")
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}
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m.stop = make(chan struct{})
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go m.mine(context.TODO())
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return nil
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}
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func (m *Miner) Stop(ctx context.Context) error {
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m.lk.Lock()
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m.stopping = make(chan struct{})
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stopping := m.stopping
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close(m.stop)
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m.lk.Unlock()
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select {
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case <-stopping:
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return nil
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case <-ctx.Done():
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return ctx.Err()
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}
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}
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func (m *Miner) niceSleep(d time.Duration) bool {
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select {
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case <-build.Clock.After(d):
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return true
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case <-m.stop:
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log.Infow("received interrupt while trying to sleep in mining cycle")
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return false
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}
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}
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func (m *Miner) mine(ctx context.Context) {
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ctx, span := trace.StartSpan(ctx, "/mine")
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defer span.End()
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var lastBase MiningBase
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minerLoop:
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for {
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select {
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case <-m.stop:
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stopping := m.stopping
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m.stop = nil
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m.stopping = nil
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close(stopping)
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return
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default:
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}
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var base *MiningBase
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var onDone func(bool, abi.ChainEpoch, error)
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var injectNulls abi.ChainEpoch
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for {
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prebase, err := m.GetBestMiningCandidate(ctx)
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if err != nil {
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log.Errorf("failed to get best mining candidate: %s", err)
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if !m.niceSleep(time.Second * 5) {
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continue minerLoop
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}
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continue
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}
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if base != nil && base.TipSet.Height() == prebase.TipSet.Height() && base.NullRounds == prebase.NullRounds {
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base = prebase
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break
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}
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if base != nil {
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onDone(false, 0, nil)
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}
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// TODO: need to change the orchestration here. the problem is that
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// we are waiting *after* we enter this loop and selecta mining
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// candidate, which is almost certain to change in multiminer
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// tests. Instead, we should block before entering the loop, so
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// that when the test 'MineOne' function is triggered, we pull our
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// best mining candidate at that time.
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// Wait until propagation delay period after block we plan to mine on
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onDone, injectNulls, err = m.waitFunc(ctx, prebase.TipSet.MinTimestamp())
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if err != nil {
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log.Error(err)
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continue
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}
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// just wait for the beacon entry to become available before we select our final mining base
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_, err = m.api.BeaconGetEntry(ctx, prebase.TipSet.Height()+prebase.NullRounds+1)
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if err != nil {
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log.Errorf("failed getting beacon entry: %s", err)
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if !m.niceSleep(time.Second) {
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continue minerLoop
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}
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continue
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}
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base = prebase
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}
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base.NullRounds += injectNulls // testing
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if base.TipSet.Equals(lastBase.TipSet) && lastBase.NullRounds == base.NullRounds {
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log.Warnf("BestMiningCandidate from the previous round: %s (nulls:%d)", lastBase.TipSet.Cids(), lastBase.NullRounds)
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if !m.niceSleep(time.Duration(build.BlockDelaySecs) * time.Second) {
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continue minerLoop
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}
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continue
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}
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b, err := m.mineOne(ctx, base)
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if err != nil {
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log.Errorf("mining block failed: %+v", err)
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if !m.niceSleep(time.Second) {
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continue minerLoop
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}
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onDone(false, 0, err)
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continue
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}
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lastBase = *base
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var h abi.ChainEpoch
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if b != nil {
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h = b.Header.Height
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}
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onDone(b != nil, h, nil)
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if b != nil {
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m.journal.RecordEvent(m.evtTypes[evtTypeBlockMined], func() interface{} {
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return map[string]interface{}{
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"parents": base.TipSet.Cids(),
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"nulls": base.NullRounds,
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"epoch": b.Header.Height,
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"timestamp": b.Header.Timestamp,
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"cid": b.Header.Cid(),
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}
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})
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btime := time.Unix(int64(b.Header.Timestamp), 0)
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now := build.Clock.Now()
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switch {
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case btime == now:
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// block timestamp is perfectly aligned with time.
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case btime.After(now):
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if !m.niceSleep(build.Clock.Until(btime)) {
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log.Warnf("received interrupt while waiting to broadcast block, will shutdown after block is sent out")
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build.Clock.Sleep(build.Clock.Until(btime))
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}
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default:
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log.Warnw("mined block in the past",
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"block-time", btime, "time", build.Clock.Now(), "difference", build.Clock.Since(btime))
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}
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if err := m.sf.MinedBlock(b.Header, base.TipSet.Height()+base.NullRounds); err != nil {
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log.Errorf("<!!> SLASH FILTER ERROR: %s", err)
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continue
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}
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blkKey := fmt.Sprintf("%d", b.Header.Height)
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if _, ok := m.minedBlockHeights.Get(blkKey); ok {
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log.Warnw("Created a block at the same height as another block we've created", "height", b.Header.Height, "miner", b.Header.Miner, "parents", b.Header.Parents)
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continue
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}
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m.minedBlockHeights.Add(blkKey, true)
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if err := m.api.SyncSubmitBlock(ctx, b); err != nil {
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log.Errorf("failed to submit newly mined block: %s", err)
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}
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} else {
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base.NullRounds++
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// Wait until the next epoch, plus the propagation delay, so a new tipset
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// has enough time to form.
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//
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// See: https://github.com/filecoin-project/lotus/issues/1845
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nextRound := time.Unix(int64(base.TipSet.MinTimestamp()+build.BlockDelaySecs*uint64(base.NullRounds))+int64(build.PropagationDelaySecs), 0)
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select {
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case <-build.Clock.After(build.Clock.Until(nextRound)):
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case <-m.stop:
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stopping := m.stopping
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m.stop = nil
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m.stopping = nil
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close(stopping)
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return
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}
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}
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}
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}
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type MiningBase struct {
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TipSet *types.TipSet
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NullRounds abi.ChainEpoch
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}
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func (m *Miner) GetBestMiningCandidate(ctx context.Context) (*MiningBase, error) {
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m.lk.Lock()
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defer m.lk.Unlock()
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bts, err := m.api.ChainHead(ctx)
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if err != nil {
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return nil, err
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}
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if m.lastWork != nil {
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if m.lastWork.TipSet.Equals(bts) {
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return m.lastWork, nil
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}
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btsw, err := m.api.ChainTipSetWeight(ctx, bts.Key())
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if err != nil {
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return nil, err
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}
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ltsw, err := m.api.ChainTipSetWeight(ctx, m.lastWork.TipSet.Key())
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if err != nil {
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m.lastWork = nil
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return nil, err
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}
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if types.BigCmp(btsw, ltsw) <= 0 {
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return m.lastWork, nil
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}
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}
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m.lastWork = &MiningBase{TipSet: bts}
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return m.lastWork, nil
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}
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// mineOne attempts to mine a single block, and does so synchronously, if and
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// only if we are eligible to mine.
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//
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// {hint/landmark}: This method coordinates all the steps involved in mining a
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// block, including the condition of whether mine or not at all depending on
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// whether we win the round or not.
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//
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// This method does the following:
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//
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// 1.
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func (m *Miner) mineOne(ctx context.Context, base *MiningBase) (*types.BlockMsg, error) {
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log.Debugw("attempting to mine a block", "tipset", types.LogCids(base.TipSet.Cids()))
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start := build.Clock.Now()
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round := base.TipSet.Height() + base.NullRounds + 1
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mbi, err := m.api.MinerGetBaseInfo(ctx, m.address, round, base.TipSet.Key())
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if err != nil {
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return nil, xerrors.Errorf("failed to get mining base info: %w", err)
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}
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if mbi == nil {
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return nil, nil
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}
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if !mbi.EligibleForMining {
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// slashed or just have no power yet
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return nil, nil
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}
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tMBI := build.Clock.Now()
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beaconPrev := mbi.PrevBeaconEntry
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tDrand := build.Clock.Now()
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bvals := mbi.BeaconEntries
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tPowercheck := build.Clock.Now()
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log.Infof("Time delta between now and our mining base: %ds (nulls: %d)", uint64(build.Clock.Now().Unix())-base.TipSet.MinTimestamp(), base.NullRounds)
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rbase := beaconPrev
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if len(bvals) > 0 {
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rbase = bvals[len(bvals)-1]
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}
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ticket, err := m.computeTicket(ctx, &rbase, base, mbi)
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if err != nil {
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return nil, xerrors.Errorf("scratching ticket failed: %w", err)
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}
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winner, err := gen.IsRoundWinner(ctx, base.TipSet, round, m.address, rbase, mbi, m.api)
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if err != nil {
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return nil, xerrors.Errorf("failed to check if we win next round: %w", err)
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}
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if winner == nil {
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return nil, nil
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}
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tTicket := build.Clock.Now()
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buf := new(bytes.Buffer)
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if err := m.address.MarshalCBOR(buf); err != nil {
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return nil, xerrors.Errorf("failed to marshal miner address: %w", err)
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}
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rand, err := store.DrawRandomness(rbase.Data, crypto.DomainSeparationTag_WinningPoStChallengeSeed, base.TipSet.Height()+base.NullRounds+1, buf.Bytes())
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if err != nil {
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return nil, xerrors.Errorf("failed to get randomness for winning post: %w", err)
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}
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prand := abi.PoStRandomness(rand)
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tSeed := build.Clock.Now()
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postProof, err := m.epp.ComputeProof(ctx, mbi.Sectors, prand)
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if err != nil {
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return nil, xerrors.Errorf("failed to compute winning post proof: %w", err)
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}
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// get pending messages early,
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msgs, err := m.api.MpoolSelect(context.TODO(), base.TipSet.Key(), ticket.Quality())
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if err != nil {
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return nil, xerrors.Errorf("failed to select messages for block: %w", err)
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}
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tPending := build.Clock.Now()
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// TODO: winning post proof
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b, err := m.createBlock(base, m.address, ticket, winner, bvals, postProof, msgs)
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if err != nil {
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return nil, xerrors.Errorf("failed to create block: %w", err)
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}
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tCreateBlock := build.Clock.Now()
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dur := tCreateBlock.Sub(start)
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parentMiners := make([]address.Address, len(base.TipSet.Blocks()))
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for i, header := range base.TipSet.Blocks() {
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parentMiners[i] = header.Miner
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}
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log.Infow("mined new block", "cid", b.Cid(), "height", b.Header.Height, "miner", b.Header.Miner, "parents", parentMiners, "took", dur)
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if dur > time.Second*time.Duration(build.BlockDelaySecs) {
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log.Warnw("CAUTION: block production took longer than the block delay. Your computer may not be fast enough to keep up",
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"tMinerBaseInfo ", tMBI.Sub(start),
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"tDrand ", tDrand.Sub(tMBI),
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"tPowercheck ", tPowercheck.Sub(tDrand),
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"tTicket ", tTicket.Sub(tPowercheck),
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"tSeed ", tSeed.Sub(tTicket),
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"tPending ", tPending.Sub(tSeed),
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"tCreateBlock ", tCreateBlock.Sub(tPending))
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}
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return b, nil
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}
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func (m *Miner) computeTicket(ctx context.Context, brand *types.BeaconEntry, base *MiningBase, mbi *api.MiningBaseInfo) (*types.Ticket, error) {
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buf := new(bytes.Buffer)
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if err := m.address.MarshalCBOR(buf); err != nil {
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return nil, xerrors.Errorf("failed to marshal address to cbor: %w", err)
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}
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round := base.TipSet.Height() + base.NullRounds + 1
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if round > build.UpgradeSmokeHeight {
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buf.Write(base.TipSet.MinTicket().VRFProof)
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}
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worker, err := m.api.StateAccountKey(ctx, mbi.WorkerKey, types.EmptyTSK)
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if err != nil {
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return nil, err
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}
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input, err := store.DrawRandomness(brand.Data, crypto.DomainSeparationTag_TicketProduction, round-build.TicketRandomnessLookback, buf.Bytes())
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if err != nil {
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return nil, err
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}
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vrfOut, err := gen.ComputeVRF(ctx, m.api.WalletSign, worker, input)
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if err != nil {
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return nil, err
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}
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return &types.Ticket{
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VRFProof: vrfOut,
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}, nil
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}
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func (m *Miner) createBlock(base *MiningBase, addr address.Address, ticket *types.Ticket,
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eproof *types.ElectionProof, bvals []types.BeaconEntry, wpostProof []proof2.PoStProof, msgs []*types.SignedMessage) (*types.BlockMsg, error) {
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uts := base.TipSet.MinTimestamp() + build.BlockDelaySecs*(uint64(base.NullRounds)+1)
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nheight := base.TipSet.Height() + base.NullRounds + 1
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// why even return this? that api call could just submit it for us
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return m.api.MinerCreateBlock(context.TODO(), &api.BlockTemplate{
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Miner: addr,
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Parents: base.TipSet.Key(),
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Ticket: ticket,
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Eproof: eproof,
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BeaconValues: bvals,
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Messages: msgs,
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Epoch: nheight,
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Timestamp: uts,
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WinningPoStProof: wpostProof,
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})
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}
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type actCacheEntry struct {
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act *types.Actor
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err error
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}
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type cachedActorLookup struct {
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tsk types.TipSetKey
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cache map[address.Address]actCacheEntry
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fallback gasguess.ActorLookup
|
|
}
|
|
|
|
func (c *cachedActorLookup) StateGetActor(ctx context.Context, a address.Address, tsk types.TipSetKey) (*types.Actor, error) {
|
|
if c.tsk == tsk {
|
|
e, has := c.cache[a]
|
|
if has {
|
|
return e.act, e.err
|
|
}
|
|
}
|
|
|
|
e, err := c.fallback(ctx, a, tsk)
|
|
if c.tsk == tsk {
|
|
c.cache[a] = actCacheEntry{
|
|
act: e, err: err,
|
|
}
|
|
}
|
|
return e, err
|
|
}
|
|
|
|
type ActorLookup func(context.Context, address.Address, types.TipSetKey) (*types.Actor, error)
|