lotus/chain/actors/actor_miner.go

1001 lines
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package actors
import (
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"bytes"
"context"
"encoding/binary"
"fmt"
ffi "github.com/filecoin-project/filecoin-ffi"
"github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/chain/actors/aerrors"
"github.com/filecoin-project/lotus/chain/address"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/lib/sectorbuilder"
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"github.com/filecoin-project/go-amt-ipld"
"github.com/ipfs/go-cid"
cbor "github.com/ipfs/go-ipld-cbor"
"github.com/libp2p/go-libp2p-core/peer"
cbg "github.com/whyrusleeping/cbor-gen"
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"go.opencensus.io/trace"
"golang.org/x/xerrors"
)
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const MaxSectors = 1 << 48
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type StorageMinerActor struct{}
type StorageMinerActorState struct {
// PreCommittedSectors is the set of sectors that have been committed to but not
// yet had their proofs submitted
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PreCommittedSectors map[string]*PreCommittedSector
// All sectors this miner has committed.
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//
// AMT[sectorID]ffi.PublicSectorInfo
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Sectors cid.Cid
// TODO: Spec says 'StagedCommittedSectors', which one is it?
// Sectors this miner is currently mining. It is only updated
// when a PoSt is submitted (not as each new sector commitment is added).
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//
// AMT[sectorID]ffi.PublicSectorInfo
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ProvingSet cid.Cid
// TODO: these:
// SectorTable
// SectorExpirationQueue
// ChallengeStatus
// Contains mostly static info about this miner
Info cid.Cid
// Faulty sectors reported since last SubmitPost
FaultSet types.BitField
LastFaultSubmission uint64
// Amount of power this miner has.
Power types.BigInt
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// Active is set to true after the miner has submitted their first PoSt
Active bool
// The height at which this miner was slashed at.
SlashedAt uint64
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ElectionPeriodStart uint64
}
type MinerInfo struct {
// Account that owns this miner.
// - Income and returned collateral are paid to this address.
// - This address is also allowed to change the worker address for the miner.
Owner address.Address
// Worker account for this miner.
// This will be the key that is used to sign blocks created by this miner, and
// sign messages sent on behalf of this miner to commit sectors, submit PoSts, and
// other day to day miner activities.
Worker address.Address
// Libp2p identity that should be used when connecting to this miner.
PeerID peer.ID
// Amount of space in each sector committed to the network by this miner.
SectorSize uint64
// SubsectorCount
}
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type PreCommittedSector struct {
Info SectorPreCommitInfo
ReceivedEpoch uint64
}
type StorageMinerConstructorParams struct {
Owner address.Address
Worker address.Address
SectorSize uint64
PeerID peer.ID
}
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type SectorPreCommitInfo struct {
SectorNumber uint64
CommR []byte // TODO: Spec says CID
SealEpoch uint64
DealIDs []uint64
}
type maMethods struct {
Constructor uint64
PreCommitSector uint64
ProveCommitSector uint64
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SubmitFallbackPoSt uint64
SlashStorageFault uint64
GetCurrentProvingSet uint64
ArbitrateDeal uint64
DePledge uint64
GetOwner uint64
GetWorkerAddr uint64
GetPower uint64
GetPeerID uint64
GetSectorSize uint64
UpdatePeerID uint64
ChangeWorker uint64
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IsSlashed uint64
CheckMiner uint64
DeclareFaults uint64
SlashConsensusFault uint64
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SubmitElectionPoSt uint64
}
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var MAMethods = maMethods{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}
func (sma StorageMinerActor) Exports() []interface{} {
return []interface{}{
1: sma.StorageMinerConstructor,
2: sma.PreCommitSector,
3: sma.ProveCommitSector,
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4: sma.SubmitFallbackPoSt,
//5: sma.SlashStorageFault,
//6: sma.GetCurrentProvingSet,
//7: sma.ArbitrateDeal,
//8: sma.DePledge,
9: sma.GetOwner,
10: sma.GetWorkerAddr,
11: sma.GetPower, // TODO: Remove
12: sma.GetPeerID,
13: sma.GetSectorSize,
14: sma.UpdatePeerID,
//15: sma.ChangeWorker,
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16: sma.IsSlashed,
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17: sma.CheckMiner,
18: sma.DeclareFaults,
19: sma.SlashConsensusFault,
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20: sma.SubmitElectionPoSt,
}
}
func loadState(vmctx types.VMContext) (cid.Cid, *StorageMinerActorState, ActorError) {
var self StorageMinerActorState
oldstate := vmctx.Storage().GetHead()
if err := vmctx.Storage().Get(oldstate, &self); err != nil {
return cid.Undef, nil, err
}
return oldstate, &self, nil
}
func loadMinerInfo(vmctx types.VMContext, m *StorageMinerActorState) (*MinerInfo, ActorError) {
var mi MinerInfo
if err := vmctx.Storage().Get(m.Info, &mi); err != nil {
return nil, err
}
return &mi, nil
}
func (sma StorageMinerActor) StorageMinerConstructor(act *types.Actor, vmctx types.VMContext, params *StorageMinerConstructorParams) ([]byte, ActorError) {
minerInfo := &MinerInfo{
Owner: params.Owner,
Worker: params.Worker,
PeerID: params.PeerID,
SectorSize: params.SectorSize,
}
minfocid, err := vmctx.Storage().Put(minerInfo)
if err != nil {
return nil, err
}
var self StorageMinerActorState
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sectors := amt.NewAMT(types.WrapStorage(vmctx.Storage()))
scid, serr := sectors.Flush()
if serr != nil {
return nil, aerrors.HandleExternalError(serr, "initializing AMT")
}
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self.Sectors = scid
self.ProvingSet = scid
self.Info = minfocid
storage := vmctx.Storage()
c, err := storage.Put(&self)
if err != nil {
return nil, err
}
if err := storage.Commit(EmptyCBOR, c); err != nil {
return nil, err
}
return nil, nil
}
func (sma StorageMinerActor) PreCommitSector(act *types.Actor, vmctx types.VMContext, params *SectorPreCommitInfo) ([]byte, ActorError) {
ctx := vmctx.Context()
oldstate, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
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if params.SealEpoch >= vmctx.BlockHeight()+build.SealRandomnessLookback {
return nil, aerrors.Newf(1, "sector commitment must be based off past randomness (%d >= %d)", params.SealEpoch, vmctx.BlockHeight()+build.SealRandomnessLookback)
}
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if vmctx.BlockHeight()-params.SealEpoch+build.SealRandomnessLookback > build.SealRandomnessLookbackLimit {
return nil, aerrors.Newf(2, "sector commitment must be recent enough (was %d)", vmctx.BlockHeight()-params.SealEpoch+build.SealRandomnessLookback)
}
mi, err := loadMinerInfo(vmctx, self)
if err != nil {
return nil, err
}
if vmctx.Message().From != mi.Worker {
return nil, aerrors.New(1, "not authorized to commit sector for miner")
}
// make sure the miner isnt trying to submit a pre-existing sector
unique, err := SectorIsUnique(ctx, vmctx.Storage(), self.Sectors, params.SectorNumber)
if err != nil {
return nil, err
}
if !unique {
return nil, aerrors.New(3, "sector already committed!")
}
// Power of the miner after adding this sector
futurePower := types.BigAdd(self.Power, types.NewInt(mi.SectorSize))
collateralRequired := CollateralForPower(futurePower)
// TODO: grab from market?
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if act.Balance.LessThan(collateralRequired) {
return nil, aerrors.New(4, "not enough collateral")
}
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self.PreCommittedSectors[uintToStringKey(params.SectorNumber)] = &PreCommittedSector{
Info: *params,
ReceivedEpoch: vmctx.BlockHeight(),
}
if len(self.PreCommittedSectors) > 4096 {
return nil, aerrors.New(5, "too many precommitted sectors")
}
nstate, err := vmctx.Storage().Put(self)
if err != nil {
return nil, err
}
if err := vmctx.Storage().Commit(oldstate, nstate); err != nil {
return nil, err
}
return nil, nil
}
func uintToStringKey(i uint64) string {
buf := make([]byte, 10)
n := binary.PutUvarint(buf, i)
return string(buf[:n])
}
type SectorProveCommitInfo struct {
Proof []byte
SectorID uint64
DealIDs []uint64
}
func (sma StorageMinerActor) ProveCommitSector(act *types.Actor, vmctx types.VMContext, params *SectorProveCommitInfo) ([]byte, ActorError) {
ctx := vmctx.Context()
oldstate, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
mi, err := loadMinerInfo(vmctx, self)
if err != nil {
return nil, err
}
us, ok := self.PreCommittedSectors[uintToStringKey(params.SectorID)]
if !ok {
return nil, aerrors.New(1, "no pre-commitment found for sector")
}
if us.ReceivedEpoch+build.InteractivePoRepDelay >= vmctx.BlockHeight() {
return nil, aerrors.New(2, "too early for proof submission")
}
delete(self.PreCommittedSectors, uintToStringKey(params.SectorID))
// TODO: ensure normalization to ID address
maddr := vmctx.Message().To
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ticket, err := vmctx.GetRandomness(us.Info.SealEpoch - build.SealRandomnessLookback)
if err != nil {
return nil, aerrors.Wrap(err, "failed to get ticket randomness")
}
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seed, err := vmctx.GetRandomness(us.ReceivedEpoch + build.InteractivePoRepDelay)
if err != nil {
return nil, aerrors.Wrap(err, "failed to get randomness for prove sector commitment")
}
enc, err := SerializeParams(&ComputeDataCommitmentParams{
DealIDs: params.DealIDs,
SectorSize: mi.SectorSize,
})
if err != nil {
return nil, aerrors.Wrap(err, "failed to serialize ComputeDataCommitmentParams")
}
commD, err := vmctx.Send(StorageMarketAddress, SMAMethods.ComputeDataCommitment, types.NewInt(0), enc)
if err != nil {
return nil, aerrors.Wrapf(err, "failed to compute data commitment (sector %d, deals: %v)", params.SectorID, params.DealIDs)
}
if ok, err := vmctx.Sys().ValidatePoRep(ctx, maddr, mi.SectorSize, commD, us.Info.CommR, ticket, params.Proof, seed, params.SectorID); err != nil {
return nil, err
} else if !ok {
return nil, aerrors.Newf(2, "porep proof was invalid (t:%x; s:%x(%d); p:%s)", ticket, seed, us.ReceivedEpoch+build.InteractivePoRepDelay, truncateHexPrint(params.Proof))
}
// Note: There must exist a unique index in the miner's sector set for each
// sector ID. The `faults`, `recovered`, and `done` parameters of the
// SubmitPoSt method express indices into this sector set.
nssroot, err := AddToSectorSet(ctx, types.WrapStorage(vmctx.Storage()), self.Sectors, params.SectorID, us.Info.CommR, commD)
if err != nil {
return nil, err
}
self.Sectors = nssroot
// if miner is not mining, start their proving period now
// Note: As written here, every miners first PoSt will only be over one sector.
// We could set up a 'grace period' for starting mining that would allow miners
// to submit several sectors for their first proving period. Alternatively, we
// could simply make the 'PreCommitSector' call take multiple sectors at a time.
//
// Note: Proving period is a function of sector size; small sectors take less
// time to prove than large sectors do. Sector size is selected when pledging.
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pss, lerr := amt.LoadAMT(types.WrapStorage(vmctx.Storage()), self.ProvingSet)
if lerr != nil {
return nil, aerrors.HandleExternalError(lerr, "could not load proving set node")
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}
if pss.Count == 0 {
self.ProvingSet = self.Sectors
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// TODO: probably want to wait until the miner is above a certain
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// threshold before starting this
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self.ElectionPeriodStart = vmctx.BlockHeight()
}
nstate, err := vmctx.Storage().Put(self)
if err != nil {
return nil, err
}
if err := vmctx.Storage().Commit(oldstate, nstate); err != nil {
return nil, err
}
activateParams, err := SerializeParams(&ActivateStorageDealsParams{
Deals: params.DealIDs,
})
if err != nil {
return nil, err
}
_, err = vmctx.Send(StorageMarketAddress, SMAMethods.ActivateStorageDeals, types.NewInt(0), activateParams)
return nil, aerrors.Wrapf(err, "calling ActivateStorageDeals failed")
}
func truncateHexPrint(b []byte) string {
s := fmt.Sprintf("%x", b)
if len(s) > 60 {
return s[:20] + "..." + s[len(s)-20:]
}
return s
}
type SubmitFallbackPoStParams struct {
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Proof []byte
Candidates []types.EPostTicket
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}
func (sma StorageMinerActor) SubmitFallbackPoSt(act *types.Actor, vmctx types.VMContext, params *SubmitFallbackPoStParams) ([]byte, ActorError) {
oldstate, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
mi, err := loadMinerInfo(vmctx, self)
if err != nil {
return nil, err
}
if vmctx.Message().From != mi.Worker {
return nil, aerrors.New(1, "not authorized to submit post for miner")
}
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/*
// TODO: handle fees
msgVal := vmctx.Message().Value
if msgVal.LessThan(feesRequired) {
return nil, aerrors.New(2, "not enough funds to pay post submission fees")
}
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if msgVal.GreaterThan(feesRequired) {
_, err := vmctx.Send(vmctx.Message().From, 0,
types.BigSub(msgVal, feesRequired), nil)
if err != nil {
return nil, aerrors.Wrap(err, "could not refund excess fees")
}
}
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*/
var seed [sectorbuilder.CommLen]byte
{
randHeight := self.ElectionPeriodStart + build.FallbackPoStDelay
if vmctx.BlockHeight() <= randHeight {
// TODO: spec, retcode
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return nil, aerrors.Newf(1, "submit fallback PoSt called too early (%d < %d)", vmctx.BlockHeight(), randHeight)
}
rand, err := vmctx.GetRandomness(randHeight)
if err != nil {
return nil, aerrors.Wrap(err, "could not get randomness for PoST")
}
if len(rand) < len(seed) {
return nil, aerrors.Escalate(fmt.Errorf("randomness too small (%d < %d)",
len(rand), len(seed)), "improper randomness")
}
copy(seed[:], rand)
}
pss, lerr := amt.LoadAMT(types.WrapStorage(vmctx.Storage()), self.ProvingSet)
if lerr != nil {
return nil, aerrors.HandleExternalError(lerr, "could not load proving set node")
}
faults, nerr := self.FaultSet.AllMap()
if nerr != nil {
return nil, aerrors.Absorb(err, 5, "RLE+ invalid")
}
var sectorInfos []ffi.PublicSectorInfo
if err := pss.ForEach(func(id uint64, v *cbg.Deferred) error {
if faults[id] {
return nil
}
var comms [][]byte
if err := cbor.DecodeInto(v.Raw, &comms); err != nil {
return xerrors.New("could not decode comms")
}
si := ffi.PublicSectorInfo{
SectorID: id,
}
commR := comms[0]
if len(commR) != len(si.CommR) {
return xerrors.Errorf("commR length is wrong: %d", len(commR))
}
copy(si.CommR[:], commR)
sectorInfos = append(sectorInfos, si)
return nil
}); err != nil {
return nil, aerrors.Absorb(err, 3, "could not decode sectorset")
}
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proverID := vmctx.Message().To // TODO: normalize to ID address
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var candidates []sectorbuilder.EPostCandidate
for _, t := range params.Candidates {
var partial [32]byte
copy(partial[:], t.Partial)
candidates = append(candidates, sectorbuilder.EPostCandidate{
PartialTicket: partial,
SectorID: t.SectorID,
SectorChallengeIndex: t.ChallengeIndex,
})
}
if ok, lerr := sectorbuilder.VerifyFallbackPost(vmctx.Context(), mi.SectorSize,
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sectorbuilder.NewSortedPublicSectorInfo(sectorInfos), seed[:], params.Proof, candidates, proverID, 0); !ok || lerr != nil { // TODO: FORK - set faults to len(faults)
if lerr != nil {
// TODO: study PoST errors
return nil, aerrors.Absorb(lerr, 4, "PoST error")
}
if !ok {
return nil, aerrors.New(4, "PoST invalid")
}
}
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// Post submission is successful!
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if err := onSuccessfulPoSt(self, vmctx); err != nil {
return nil, err
}
c, err := vmctx.Storage().Put(self)
if err != nil {
return nil, err
}
if err := vmctx.Storage().Commit(oldstate, c); err != nil {
return nil, err
}
return nil, nil
}
func (sma StorageMinerActor) GetPower(act *types.Actor, vmctx types.VMContext, params *struct{}) ([]byte, ActorError) {
_, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
return self.Power.Bytes(), nil
}
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func SectorIsUnique(ctx context.Context, s types.Storage, sroot cid.Cid, sid uint64) (bool, ActorError) {
found, _, _, err := GetFromSectorSet(ctx, s, sroot, sid)
if err != nil {
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return false, err
}
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return !found, nil
}
func AddToSectorSet(ctx context.Context, blks amt.Blocks, ss cid.Cid, sectorID uint64, commR, commD []byte) (cid.Cid, ActorError) {
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if sectorID >= MaxSectors {
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return cid.Undef, aerrors.Newf(25, "sector ID out of range: %d", sectorID)
}
ssr, err := amt.LoadAMT(blks, ss)
if err != nil {
return cid.Undef, aerrors.HandleExternalError(err, "could not load sector set node")
}
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// TODO: Spec says to use SealCommitment, and construct commD from deals each time,
// but that would make SubmitPoSt way, way more expensive
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if err := ssr.Set(sectorID, [][]byte{commR, commD}); err != nil {
return cid.Undef, aerrors.HandleExternalError(err, "failed to set commitment in sector set")
}
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ncid, err := ssr.Flush()
if err != nil {
return cid.Undef, aerrors.HandleExternalError(err, "failed to flush sector set")
}
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return ncid, nil
}
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func GetFromSectorSet(ctx context.Context, s types.Storage, ss cid.Cid, sectorID uint64) (bool, []byte, []byte, ActorError) {
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if sectorID >= MaxSectors {
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return false, nil, nil, aerrors.Newf(25, "sector ID out of range: %d", sectorID)
}
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ssr, err := amt.LoadAMT(types.WrapStorage(s), ss)
if err != nil {
return false, nil, nil, aerrors.HandleExternalError(err, "could not load sector set node")
}
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var comms [][]byte
err = ssr.Get(sectorID, &comms)
if err != nil {
if _, ok := err.(*amt.ErrNotFound); ok {
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return false, nil, nil, nil
}
return false, nil, nil, aerrors.HandleExternalError(err, "failed to find sector in sector set")
}
if len(comms) != 2 {
return false, nil, nil, aerrors.Newf(20, "sector set entry should only have 2 elements")
}
return true, comms[0], comms[1], nil
}
func RemoveFromSectorSet(ctx context.Context, s types.Storage, ss cid.Cid, ids []uint64) (cid.Cid, aerrors.ActorError) {
ssr, err := amt.LoadAMT(types.WrapStorage(s), ss)
if err != nil {
return cid.Undef, aerrors.HandleExternalError(err, "could not load sector set node")
}
if err := ssr.BatchDelete(ids); err != nil {
return cid.Undef, aerrors.HandleExternalError(err, "failed to delete from sector set")
}
ncid, err := ssr.Flush()
if err != nil {
return cid.Undef, aerrors.HandleExternalError(err, "failed to flush sector set")
}
return ncid, nil
}
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func ValidatePoRep(ctx context.Context, maddr address.Address, ssize uint64, commD, commR, ticket, proof, seed []byte, sectorID uint64) (bool, ActorError) {
_, span := trace.StartSpan(ctx, "ValidatePoRep")
defer span.End()
ok, err := sectorbuilder.VerifySeal(ssize, commR, commD, maddr, ticket, seed, sectorID, proof)
if err != nil {
return false, aerrors.Absorb(err, 25, "verify seal failed")
}
return ok, nil
}
func CollateralForPower(power types.BigInt) types.BigInt {
return types.BigMul(power, types.NewInt(10))
/* TODO: this
availableFil = FakeGlobalMethods.GetAvailableFil()
totalNetworkPower = StorageMinerActor.GetTotalStorage()
numMiners = StorageMarket.GetMinerCount()
powerCollateral = availableFil * NetworkConstants.POWER_COLLATERAL_PROPORTION * power / totalNetworkPower
perCapitaCollateral = availableFil * NetworkConstants.PER_CAPITA_COLLATERAL_PROPORTION / numMiners
collateralRequired = math.Ceil(minerPowerCollateral + minerPerCapitaCollateral)
return collateralRequired
*/
}
func (sma StorageMinerActor) GetWorkerAddr(act *types.Actor, vmctx types.VMContext, params *struct{}) ([]byte, ActorError) {
_, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
mi, err := loadMinerInfo(vmctx, self)
if err != nil {
return nil, err
}
return mi.Worker.Bytes(), nil
}
func (sma StorageMinerActor) GetOwner(act *types.Actor, vmctx types.VMContext, params *struct{}) ([]byte, ActorError) {
_, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
mi, err := loadMinerInfo(vmctx, self)
if err != nil {
return nil, err
}
return mi.Owner.Bytes(), nil
}
func (sma StorageMinerActor) GetPeerID(act *types.Actor, vmctx types.VMContext, params *struct{}) ([]byte, ActorError) {
_, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
mi, err := loadMinerInfo(vmctx, self)
if err != nil {
return nil, err
}
return []byte(mi.PeerID), nil
}
type UpdatePeerIDParams struct {
PeerID peer.ID
}
func (sma StorageMinerActor) UpdatePeerID(act *types.Actor, vmctx types.VMContext, params *UpdatePeerIDParams) ([]byte, ActorError) {
oldstate, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
mi, err := loadMinerInfo(vmctx, self)
if err != nil {
return nil, err
}
if vmctx.Message().From != mi.Worker {
return nil, aerrors.New(2, "only the mine worker may update the peer ID")
}
mi.PeerID = params.PeerID
mic, err := vmctx.Storage().Put(mi)
if err != nil {
return nil, err
}
self.Info = mic
c, err := vmctx.Storage().Put(self)
if err != nil {
return nil, err
}
if err := vmctx.Storage().Commit(oldstate, c); err != nil {
return nil, err
}
return nil, nil
}
func (sma StorageMinerActor) GetSectorSize(act *types.Actor, vmctx types.VMContext, params *struct{}) ([]byte, ActorError) {
_, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
mi, err := loadMinerInfo(vmctx, self)
if err != nil {
return nil, err
}
return types.NewInt(mi.SectorSize).Bytes(), nil
}
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func isLate(height uint64, self *StorageMinerActorState) bool {
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return self.ElectionPeriodStart > 0 && height >= self.ElectionPeriodStart+build.SlashablePowerDelay
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}
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func (sma StorageMinerActor) IsSlashed(act *types.Actor, vmctx types.VMContext, params *struct{}) ([]byte, ActorError) {
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_, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
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return cbg.EncodeBool(self.SlashedAt != 0), nil
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}
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type CheckMinerParams struct {
NetworkPower types.BigInt
}
// TODO: better name
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func (sma StorageMinerActor) CheckMiner(act *types.Actor, vmctx types.VMContext, params *CheckMinerParams) ([]byte, ActorError) {
if vmctx.Message().From != StoragePowerAddress {
return nil, aerrors.New(2, "only the storage power actor can check miner")
}
oldstate, self, err := loadState(vmctx)
if err != nil {
return nil, err
}
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if !isLate(vmctx.BlockHeight(), self) {
// Everything's fine
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return nil, nil
}
if self.SlashedAt != 0 {
// Don't slash more than necessary
return nil, nil
}
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if params.NetworkPower.Equals(self.Power) {
// Don't break the network when there's only one miner left
log.Warnf("can't slash miner %s for missed PoSt, no power would be left in the network", vmctx.Message().To)
return nil, nil
}
// Slash for being late
self.SlashedAt = vmctx.BlockHeight()
nstate, err := vmctx.Storage().Put(self)
if err != nil {
return nil, err
}
if err := vmctx.Storage().Commit(oldstate, nstate); err != nil {
return nil, err
}
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var out bytes.Buffer
if err := self.Power.MarshalCBOR(&out); err != nil {
return nil, aerrors.HandleExternalError(err, "marshaling return value")
}
return out.Bytes(), nil
}
type DeclareFaultsParams struct {
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Faults types.BitField
}
func (sma StorageMinerActor) DeclareFaults(act *types.Actor, vmctx types.VMContext, params *DeclareFaultsParams) ([]byte, ActorError) {
oldstate, self, aerr := loadState(vmctx)
if aerr != nil {
return nil, aerr
}
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nfaults, err := types.MergeBitFields(params.Faults, self.FaultSet)
if err != nil {
return nil, aerrors.Absorb(err, 1, "failed to merge bitfields")
}
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self.FaultSet = nfaults
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self.LastFaultSubmission = vmctx.BlockHeight()
nstate, aerr := vmctx.Storage().Put(self)
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if err != nil { // TODO: FORK: should be aerr
return nil, aerr
}
if err := vmctx.Storage().Commit(oldstate, nstate); err != nil {
return nil, err
}
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return nil, nil
}
type MinerSlashConsensusFault struct {
Slasher address.Address
AtHeight uint64
SlashedCollateral types.BigInt
}
func (sma StorageMinerActor) SlashConsensusFault(act *types.Actor, vmctx types.VMContext, params *MinerSlashConsensusFault) ([]byte, ActorError) {
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if vmctx.Message().From != StoragePowerAddress {
return nil, aerrors.New(1, "SlashConsensusFault may only be called by the storage market actor")
}
slashedCollateral := params.SlashedCollateral
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if slashedCollateral.LessThan(act.Balance) {
slashedCollateral = act.Balance
}
// Some of the slashed collateral should be paid to the slasher
// GROWTH_RATE determines how fast the slasher share of slashed collateral will increase as block elapses
// current GROWTH_RATE results in SLASHER_SHARE reaches 1 after 30 blocks
// TODO: define arithmetic precision and rounding for this operation
blockElapsed := vmctx.BlockHeight() - params.AtHeight
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slasherShare := slasherShare(params.SlashedCollateral, blockElapsed)
burnPortion := types.BigSub(slashedCollateral, slasherShare)
_, err := vmctx.Send(vmctx.Message().From, 0, slasherShare, nil)
if err != nil {
return nil, aerrors.Wrap(err, "failed to pay slasher")
}
_, err = vmctx.Send(BurntFundsAddress, 0, burnPortion, nil)
if err != nil {
return nil, aerrors.Wrap(err, "failed to burn funds")
}
// TODO: this still allows the miner to commit sectors and submit posts,
// their users could potentially be unaffected, but the miner will never be
// able to mine a block again
// One potential issue: the miner will have to pay back the slashed
// collateral to continue submitting PoSts, which includes pledge
// collateral that they no longer really 'need'
return nil, nil
}
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func (sma StorageMinerActor) SubmitElectionPoSt(act *types.Actor, vmctx types.VMContext, params *struct{}) ([]byte, aerrors.ActorError) {
if vmctx.Message().From != NetworkAddress {
return nil, aerrors.Newf(1, "submit election post can only be called by the storage power actor")
}
oldstate, self, aerr := loadState(vmctx)
if aerr != nil {
return nil, aerr
}
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if self.SlashedAt != 0 {
return nil, aerrors.New(1, "slashed miners can't perform election PoSt")
}
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if err := onSuccessfulPoSt(self, vmctx); err != nil {
return nil, err
}
ncid, err := vmctx.Storage().Put(self)
if err != nil {
return nil, err
}
if err := vmctx.Storage().Commit(oldstate, ncid); err != nil {
return nil, err
}
return nil, nil
}
func onSuccessfulPoSt(self *StorageMinerActorState, vmctx types.VMContext) aerrors.ActorError {
// TODO: some sector upkeep stuff that is very haphazard and unclear in the spec
var mi MinerInfo
if err := vmctx.Storage().Get(self.Info, &mi); err != nil {
return err
}
pss, nerr := amt.LoadAMT(types.WrapStorage(vmctx.Storage()), self.ProvingSet)
if nerr != nil {
return aerrors.HandleExternalError(nerr, "failed to load proving set")
}
faults, nerr := self.FaultSet.All()
if nerr != nil {
return aerrors.Absorb(nerr, 1, "invalid bitfield (fatal?)")
}
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self.FaultSet = types.NewBitField()
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oldPower := self.Power
newPower := types.BigMul(types.NewInt(pss.Count-uint64(len(faults))), types.NewInt(mi.SectorSize))
// If below the minimum size requirement, miners have zero power
if newPower.LessThan(types.NewInt(build.MinimumMinerPower)) {
newPower = types.NewInt(0)
}
self.Power = newPower
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delta := types.BigSub(self.Power, oldPower)
if self.SlashedAt != 0 {
self.SlashedAt = 0
delta = self.Power
}
prevSlashingDeadline := self.ElectionPeriodStart + build.SlashablePowerDelay
if !self.Active && newPower.GreaterThan(types.NewInt(0)) {
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self.Active = true
prevSlashingDeadline = 0
}
if !(oldPower.IsZero() && newPower.IsZero()) {
enc, err := SerializeParams(&UpdateStorageParams{
Delta: delta,
NextSlashDeadline: vmctx.BlockHeight() + build.SlashablePowerDelay,
PreviousSlashDeadline: prevSlashingDeadline,
})
if err != nil {
return err
}
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_, err = vmctx.Send(StoragePowerAddress, SPAMethods.UpdateStorage, types.NewInt(0), enc)
if err != nil {
return aerrors.Wrap(err, "updating storage failed")
}
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}
ncid, err := RemoveFromSectorSet(vmctx.Context(), vmctx.Storage(), self.Sectors, faults)
if err != nil {
return err
}
self.Sectors = ncid
self.ProvingSet = ncid
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self.ElectionPeriodStart = vmctx.BlockHeight()
return nil
}
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func slasherShare(total types.BigInt, elapsed uint64) types.BigInt {
// [int(pow(1.26, n) * 10) for n in range(30)]
fracs := []uint64{10, 12, 15, 20, 25, 31, 40, 50, 63, 80, 100, 127, 160, 201, 254, 320, 403, 508, 640, 807, 1017, 1281, 1614, 2034, 2563, 3230, 4070, 5128, 6462, 8142}
const precision = 10000
var frac uint64
if elapsed >= uint64(len(fracs)) {
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return total
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} else {
frac = fracs[elapsed]
}
return types.BigDiv(
types.BigMul(
types.NewInt(frac),
total,
),
types.NewInt(precision),
)
}