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precommit_stage.go
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precommit_stage.go
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package stages
import (
"context"
"sort"
"time"
"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/big"
"github.com/filecoin-project/go-state-types/network"
miner5 "github.com/filecoin-project/specs-actors/v5/actors/builtin/miner"
"github.com/filecoin-project/lotus/chain/actors"
"github.com/filecoin-project/lotus/chain/actors/aerrors"
"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
"github.com/filecoin-project/lotus/chain/actors/builtin/power"
"github.com/filecoin-project/lotus/chain/actors/policy"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/cmd/lotus-sim/simulation/blockbuilder"
"github.com/filecoin-project/lotus/cmd/lotus-sim/simulation/mock"
)
const (
minPreCommitBatchSize = 1
maxPreCommitBatchSize = miner5.PreCommitSectorBatchMaxSize
)
type PreCommitStage struct {
funding Funding
committer Committer
// The tiers represent the top 1%, top 10%, and everyone else. When sealing sectors, we seal
// a group of sectors for the top 1%, a group (half that size) for the top 10%, and one
// sector for everyone else. We determine these rates by looking at two power tables.
// TODO Ideally we'd "learn" this distribution from the network. But this is good enough for
// now.
top1, top10, rest actorIter
initialized bool
}
func NewPreCommitStage(funding Funding, committer Committer) (*PreCommitStage, error) {
return &PreCommitStage{
funding: funding,
committer: committer,
}, nil
}
func (*PreCommitStage) Name() string {
return "pre-commit"
}
// packPreCommits packs pre-commit messages until the block is full.
func (stage *PreCommitStage) PackMessages(ctx context.Context, bb *blockbuilder.BlockBuilder) (_err error) {
if !stage.initialized {
if err := stage.load(ctx, bb); err != nil {
return err
}
}
var (
full bool
top1Count, top10Count, restCount int
)
start := time.Now()
defer func() {
if _err != nil {
return
}
bb.L().Debugw("packed pre commits",
"done", top1Count+top10Count+restCount,
"top1", top1Count,
"top10", top10Count,
"rest", restCount,
"filled-block", full,
"duration", time.Since(start),
)
}()
var top1Miners, top10Miners, restMiners int
for i := 0; ; i++ {
var (
minerAddr address.Address
count *int
)
// We pre-commit for the top 1%, 10%, and the of the network 1/3rd of the time each.
// This won't yield the most accurate distribution... but it'll give us a good
// enough distribution.
switch {
case (i%3) <= 0 && top1Miners < stage.top1.len():
count = &top1Count
minerAddr = stage.top1.next()
top1Miners++
case (i%3) <= 1 && top10Miners < stage.top10.len():
count = &top10Count
minerAddr = stage.top10.next()
top10Miners++
case (i%3) <= 2 && restMiners < stage.rest.len():
count = &restCount
minerAddr = stage.rest.next()
restMiners++
default:
// Well, we've run through all miners.
return nil
}
var (
added int
err error
)
added, full, err = stage.packMiner(ctx, bb, minerAddr, maxProveCommitBatchSize)
if err != nil {
return xerrors.Errorf("failed to pack precommits for miner %s: %w", minerAddr, err)
}
*count += added
if full {
return nil
}
}
}
// packPreCommitsMiner packs count pre-commits for the given miner.
func (stage *PreCommitStage) packMiner(
ctx context.Context, bb *blockbuilder.BlockBuilder,
minerAddr address.Address, count int,
) (int, bool, error) {
log := bb.L().With("miner", minerAddr)
epoch := bb.Height()
nv := bb.NetworkVersion()
minerActor, err := bb.StateTree().GetActor(minerAddr)
if err != nil {
return 0, false, err
}
minerState, err := miner.Load(bb.ActorStore(), minerActor)
if err != nil {
return 0, false, err
}
minerInfo, err := minerState.Info()
if err != nil {
return 0, false, err
}
// Make sure the miner is funded.
minerBalance, err := minerState.AvailableBalance(minerActor.Balance)
if err != nil {
return 0, false, err
}
if big.Cmp(minerBalance, MinimumFunds) < 0 {
err := stage.funding.Fund(bb, minerAddr)
if err != nil {
if blockbuilder.IsOutOfGas(err) {
return 0, true, nil
}
return 0, false, err
}
}
// Generate pre-commits.
sealType, err := miner.PreferredSealProofTypeFromWindowPoStType(
nv, minerInfo.WindowPoStProofType,
)
if err != nil {
return 0, false, err
}
sectorNos, err := minerState.UnallocatedSectorNumbers(count)
if err != nil {
return 0, false, err
}
expiration := epoch + policy.GetMaxSectorExpirationExtension()
infos := make([]miner.SectorPreCommitInfo, len(sectorNos))
for i, sno := range sectorNos {
infos[i] = miner.SectorPreCommitInfo{
SealProof: sealType,
SectorNumber: sno,
SealedCID: mock.MockCommR(minerAddr, sno),
SealRandEpoch: epoch - 1,
Expiration: expiration,
}
}
// Commit the pre-commits.
added := 0
if nv >= network.Version13 {
targetBatchSize := maxPreCommitBatchSize
for targetBatchSize >= minPreCommitBatchSize && len(infos) >= minPreCommitBatchSize {
batch := infos
if len(batch) > targetBatchSize {
batch = batch[:targetBatchSize]
}
params := miner5.PreCommitSectorBatchParams{
Sectors: batch,
}
enc, err := actors.SerializeParams(¶ms)
if err != nil {
return added, false, err
}
// NOTE: just in-case, sendAndFund will "fund" and re-try for any message
// that fails due to "insufficient funds".
if _, err := stage.funding.SendAndFund(bb, &types.Message{
To: minerAddr,
From: minerInfo.Worker,
Value: abi.NewTokenAmount(0),
Method: miner.Methods.PreCommitSectorBatch,
Params: enc,
}); blockbuilder.IsOutOfGas(err) {
// try again with a smaller batch.
targetBatchSize /= 2
continue
} else if aerr, ok := err.(aerrors.ActorError); ok && !aerr.IsFatal() {
// Log the error and move on. No reason to stop.
log.Errorw("failed to pre-commit for unknown reasons",
"error", aerr,
"sectors", batch,
)
return added, false, nil
} else if err != nil {
return added, false, err
}
for _, info := range batch {
if err := stage.committer.EnqueueProveCommit(minerAddr, epoch, info); err != nil {
return added, false, err
}
added++
}
infos = infos[len(batch):]
}
}
for _, info := range infos {
enc, err := actors.SerializeParams(&info) //nolint
if err != nil {
return 0, false, err
}
if _, err := stage.funding.SendAndFund(bb, &types.Message{
To: minerAddr,
From: minerInfo.Worker,
Value: abi.NewTokenAmount(0),
Method: miner.Methods.PreCommitSector,
Params: enc,
}); blockbuilder.IsOutOfGas(err) {
return added, true, nil
} else if err != nil {
return added, false, err
}
if err := stage.committer.EnqueueProveCommit(minerAddr, epoch, info); err != nil {
return added, false, err
}
added++
}
return added, false, nil
}
func (stage *PreCommitStage) load(ctx context.Context, bb *blockbuilder.BlockBuilder) (_err error) {
bb.L().Infow("loading miner power for pre-commits")
start := time.Now()
defer func() {
if _err != nil {
return
}
bb.L().Infow("loaded miner power for pre-commits",
"duration", time.Since(start),
"top1", stage.top1.len(),
"top10", stage.top10.len(),
"rest", stage.rest.len(),
)
}()
store := bb.ActorStore()
st := bb.ParentStateTree()
powerState, err := loadPower(store, st)
if err != nil {
return xerrors.Errorf("failed to power actor: %w", err)
}
type onboardingInfo struct {
addr address.Address
sectorCount uint64
}
var sealList []onboardingInfo
err = powerState.ForEachClaim(func(addr address.Address, claim power.Claim) error {
if claim.RawBytePower.IsZero() {
return nil
}
minerState, err := loadMiner(store, st, addr)
if err != nil {
return err
}
info, err := minerState.Info()
if err != nil {
return err
}
sectorCount := sectorsFromClaim(info.SectorSize, claim)
if sectorCount > 0 {
sealList = append(sealList, onboardingInfo{addr, uint64(sectorCount)})
}
return nil
})
if err != nil {
return err
}
if len(sealList) == 0 {
return xerrors.Errorf("simulation has no miners")
}
// Now that we have a list of sealing miners, sort them into percentiles.
sort.Slice(sealList, func(i, j int) bool {
return sealList[i].sectorCount < sealList[j].sectorCount
})
// reset, just in case.
stage.top1 = actorIter{}
stage.top10 = actorIter{}
stage.rest = actorIter{}
for i, oi := range sealList {
var dist *actorIter
if i < len(sealList)/100 {
dist = &stage.top1
} else if i < len(sealList)/10 {
dist = &stage.top10
} else {
dist = &stage.rest
}
dist.add(oi.addr)
}
stage.top1.shuffle()
stage.top10.shuffle()
stage.rest.shuffle()
stage.initialized = true
return nil
}