package sealing import ( "context" "golang.org/x/xerrors" "github.com/filecoin-project/go-state-types/abi" "github.com/filecoin-project/go-state-types/network" "github.com/filecoin-project/lotus/chain/actors/builtin" "github.com/filecoin-project/lotus/chain/actors/builtin/miner" "github.com/filecoin-project/lotus/chain/actors/policy" ) type PreCommitPolicy interface { Expiration(ctx context.Context, ps ...Piece) (abi.ChainEpoch, error) } type Chain interface { ChainHead(ctx context.Context) (TipSetToken, abi.ChainEpoch, error) StateNetworkVersion(ctx context.Context, tok TipSetToken) (network.Version, error) } // BasicPreCommitPolicy satisfies PreCommitPolicy. It has two modes: // // Mode 1: The sector contains a non-zero quantity of pieces with deal info // Mode 2: The sector contains no pieces with deal info // // The BasicPreCommitPolicy#Expiration method is given a slice of the pieces // which the miner has encoded into the sector, and from that slice picks either // the first or second mode. // // If we're in Mode 1: The pre-commit expiration epoch will be the maximum // deal end epoch of a piece in the sector. // // If we're in Mode 2: The pre-commit expiration epoch will be set to the // current epoch + the provided default duration. type BasicPreCommitPolicy struct { api Chain getSealingConfig GetSealingConfigFunc provingBuffer abi.ChainEpoch } // NewBasicPreCommitPolicy produces a BasicPreCommitPolicy. // // The provided duration is used as the default sector expiry when the sector // contains no deals. The proving boundary is used to adjust/align the sector's expiration. func NewBasicPreCommitPolicy(api Chain, cfgGetter GetSealingConfigFunc, provingBuffer abi.ChainEpoch) BasicPreCommitPolicy { return BasicPreCommitPolicy{ api: api, getSealingConfig: cfgGetter, provingBuffer: provingBuffer, } } // Expiration produces the pre-commit sector expiration epoch for an encoded // replica containing the provided enumeration of pieces and deals. func (p *BasicPreCommitPolicy) Expiration(ctx context.Context, ps ...Piece) (abi.ChainEpoch, error) { _, epoch, err := p.api.ChainHead(ctx) if err != nil { return 0, err } var end *abi.ChainEpoch for _, p := range ps { if p.DealInfo == nil { continue } if p.DealInfo.DealSchedule.EndEpoch < epoch { log.Warnf("piece schedule %+v ended before current epoch %d", p, epoch) continue } if end == nil || *end < p.DealInfo.DealSchedule.EndEpoch { tmp := p.DealInfo.DealSchedule.EndEpoch end = &tmp } } if end == nil { // no deal pieces, get expiration for committed capacity sector expirationDuration, err := p.getCCSectorLifetime() if err != nil { return 0, err } tmp := epoch + expirationDuration end = &tmp } // Ensure there is at least one day for the PC message to land without falling below min sector lifetime // TODO: The "one day" should probably be a config, though it doesn't matter too much minExp := epoch + policy.GetMinSectorExpiration() + miner.WPoStProvingPeriod if *end < minExp { end = &minExp } return *end, nil } func (p *BasicPreCommitPolicy) getCCSectorLifetime() (abi.ChainEpoch, error) { c, err := p.getSealingConfig() if err != nil { return 0, xerrors.Errorf("sealing config load error: %w", err) } var ccLifetimeEpochs = abi.ChainEpoch(uint64(c.CommittedCapacitySectorLifetime.Seconds()) / builtin.EpochDurationSeconds) // if zero value in config, assume maximum sector extension if ccLifetimeEpochs == 0 { ccLifetimeEpochs = policy.GetMaxSectorExpirationExtension() } if minExpiration := abi.ChainEpoch(miner.MinSectorExpiration); ccLifetimeEpochs < minExpiration { log.Warnf("value for CommittedCapacitySectorLiftime is too short, using default minimum (%d epochs)", minExpiration) return minExpiration, nil } if maxExpiration := policy.GetMaxSectorExpirationExtension(); ccLifetimeEpochs > maxExpiration { log.Warnf("value for CommittedCapacitySectorLiftime is too long, using default maximum (%d epochs)", maxExpiration) return maxExpiration, nil } return ccLifetimeEpochs - p.provingBuffer, nil }