lotus/precommit_policy.go

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package sealing
import (
"context"
"github.com/filecoin-project/specs-actors/actors/abi"
"github.com/filecoin-project/specs-actors/actors/builtin/miner"
)
type PreCommitPolicy interface {
Expiration(ctx context.Context, ps ...Piece) (abi.ChainEpoch, error)
}
type Chain interface {
ChainHead(ctx context.Context) (TipSetToken, abi.ChainEpoch, 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
provingBoundary abi.ChainEpoch
duration abi.ChainEpoch
}
// NewBasicPreCommitPolicy produces a BasicPreCommitPolicy
func NewBasicPreCommitPolicy(api Chain, duration abi.ChainEpoch, provingBoundary abi.ChainEpoch) BasicPreCommitPolicy {
return BasicPreCommitPolicy{
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api: api,
provingBoundary: provingBoundary,
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duration: duration,
}
}
// 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, nil
}
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 {
tmp := epoch + p.duration
end = &tmp
}
*end += miner.WPoStProvingPeriod - (*end % miner.WPoStProvingPeriod) + p.provingBoundary - 1
return *end, nil
}