lotus/chain/consensus/filcns/filecoin.go
Alfonso de la Rocha 9bfb73211e fixed RewardFunc
2022-10-13 16:43:02 +02:00

539 lines
17 KiB
Go

package filcns
import (
"bytes"
"context"
"errors"
"os"
"time"
"github.com/ipfs/go-cid"
logging "github.com/ipfs/go-log/v2"
"go.opencensus.io/trace"
"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/crypto"
"github.com/filecoin-project/go-state-types/network"
"github.com/filecoin-project/specs-actors/v7/actors/runtime/proof"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/chain"
"github.com/filecoin-project/lotus/chain/actors"
"github.com/filecoin-project/lotus/chain/actors/builtin"
"github.com/filecoin-project/lotus/chain/actors/builtin/power"
"github.com/filecoin-project/lotus/chain/actors/builtin/reward"
"github.com/filecoin-project/lotus/chain/beacon"
"github.com/filecoin-project/lotus/chain/consensus"
"github.com/filecoin-project/lotus/chain/rand"
"github.com/filecoin-project/lotus/chain/stmgr"
"github.com/filecoin-project/lotus/chain/store"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/chain/vm"
"github.com/filecoin-project/lotus/lib/async"
"github.com/filecoin-project/lotus/lib/sigs"
"github.com/filecoin-project/lotus/storage/sealer/ffiwrapper"
"github.com/filecoin-project/lotus/storage/sealer/storiface"
)
var log = logging.Logger("fil-consensus")
type FilecoinEC struct {
// The interface for accessing and putting tipsets into local storage
store *store.ChainStore
// handle to the random beacon for verification
beacon beacon.Schedule
// the state manager handles making state queries
sm *stmgr.StateManager
verifier storiface.Verifier
genesis *types.TipSet
}
// Blocks that are more than MaxHeightDrift epochs above
// the theoretical max height based on systime are quickly rejected
const MaxHeightDrift = 5
var RewardFunc = func(ctx context.Context, vmi vm.Interface, em stmgr.ExecMonitor,
epoch abi.ChainEpoch, ts *types.TipSet, params *reward.AwardBlockRewardParams) error {
ser, err := actors.SerializeParams(params)
if err != nil {
return xerrors.Errorf("failed to serialize award params: %w", err)
}
rwMsg := &types.Message{
From: builtin.SystemActorAddr,
To: reward.Address,
Nonce: uint64(epoch),
Value: types.NewInt(0),
GasFeeCap: types.NewInt(0),
GasPremium: types.NewInt(0),
GasLimit: 1 << 30,
Method: reward.Methods.AwardBlockReward,
Params: ser,
}
ret, actErr := vmi.ApplyImplicitMessage(ctx, rwMsg)
if actErr != nil {
return xerrors.Errorf("failed to apply reward message: %w", actErr)
}
if em != nil {
if err := em.MessageApplied(ctx, ts, rwMsg.Cid(), rwMsg, ret, true); err != nil {
return xerrors.Errorf("callback failed on reward message: %w", err)
}
}
if ret.ExitCode != 0 {
return xerrors.Errorf("reward application message failed (exit %d): %s", ret.ExitCode, ret.ActorErr)
}
return nil
}
func NewFilecoinExpectedConsensus(sm *stmgr.StateManager, beacon beacon.Schedule, verifier storiface.Verifier, genesis chain.Genesis) consensus.Consensus {
if build.InsecurePoStValidation {
log.Warn("*********************************************************************************************")
log.Warn(" [INSECURE-POST-VALIDATION] Insecure test validation is enabled. If you see this outside of a test, it is a severe bug! ")
log.Warn("*********************************************************************************************")
}
return &FilecoinEC{
store: sm.ChainStore(),
beacon: beacon,
sm: sm,
verifier: verifier,
genesis: genesis,
}
}
func (filec *FilecoinEC) ValidateBlock(ctx context.Context, b *types.FullBlock) (err error) {
if err := blockSanityChecks(b.Header); err != nil {
return xerrors.Errorf("incoming header failed basic sanity checks: %w", err)
}
h := b.Header
baseTs, err := filec.store.LoadTipSet(ctx, types.NewTipSetKey(h.Parents...))
if err != nil {
return xerrors.Errorf("load parent tipset failed (%s): %w", h.Parents, err)
}
winPoStNv := filec.sm.GetNetworkVersion(ctx, baseTs.Height())
lbts, lbst, err := stmgr.GetLookbackTipSetForRound(ctx, filec.sm, baseTs, h.Height)
if err != nil {
return xerrors.Errorf("failed to get lookback tipset for block: %w", err)
}
prevBeacon, err := filec.store.GetLatestBeaconEntry(ctx, baseTs)
if err != nil {
return xerrors.Errorf("failed to get latest beacon entry: %w", err)
}
// fast checks first
if h.Height <= baseTs.Height() {
return xerrors.Errorf("block height not greater than parent height: %d != %d", h.Height, baseTs.Height())
}
nulls := h.Height - (baseTs.Height() + 1)
if tgtTs := baseTs.MinTimestamp() + build.BlockDelaySecs*uint64(nulls+1); h.Timestamp != tgtTs {
return xerrors.Errorf("block has wrong timestamp: %d != %d", h.Timestamp, tgtTs)
}
now := uint64(build.Clock.Now().Unix())
if h.Timestamp > now+build.AllowableClockDriftSecs {
return xerrors.Errorf("block was from the future (now=%d, blk=%d): %w", now, h.Timestamp, consensus.ErrTemporal)
}
if h.Timestamp > now {
log.Warn("Got block from the future, but within threshold", h.Timestamp, build.Clock.Now().Unix())
}
minerCheck := async.Err(func() error {
if err := filec.minerIsValid(ctx, h.Miner, baseTs); err != nil {
return xerrors.Errorf("minerIsValid failed: %w", err)
}
return nil
})
pweight, err := filec.store.Weight(ctx, baseTs)
if err != nil {
return xerrors.Errorf("getting parent weight: %w", err)
}
if types.BigCmp(pweight, b.Header.ParentWeight) != 0 {
return xerrors.Errorf("parrent weight different: %s (header) != %s (computed)",
b.Header.ParentWeight, pweight)
}
// Stuff that needs worker address
waddr, err := stmgr.GetMinerWorkerRaw(ctx, filec.sm, lbst, h.Miner)
if err != nil {
return xerrors.Errorf("GetMinerWorkerRaw failed: %w", err)
}
winnerCheck := async.Err(func() error {
if h.ElectionProof.WinCount < 1 {
return xerrors.Errorf("block is not claiming to be a winner")
}
eligible, err := stmgr.MinerEligibleToMine(ctx, filec.sm, h.Miner, baseTs, lbts)
if err != nil {
return xerrors.Errorf("determining if miner has min power failed: %w", err)
}
if !eligible {
return xerrors.New("block's miner is ineligible to mine")
}
rBeacon := *prevBeacon
if len(h.BeaconEntries) != 0 {
rBeacon = h.BeaconEntries[len(h.BeaconEntries)-1]
}
buf := new(bytes.Buffer)
if err := h.Miner.MarshalCBOR(buf); err != nil {
return xerrors.Errorf("failed to marshal miner address to cbor: %w", err)
}
vrfBase, err := rand.DrawRandomness(rBeacon.Data, crypto.DomainSeparationTag_ElectionProofProduction, h.Height, buf.Bytes())
if err != nil {
return xerrors.Errorf("could not draw randomness: %w", err)
}
if err := VerifyElectionPoStVRF(ctx, waddr, vrfBase, h.ElectionProof.VRFProof); err != nil {
return xerrors.Errorf("validating block election proof failed: %w", err)
}
slashed, err := stmgr.GetMinerSlashed(ctx, filec.sm, baseTs, h.Miner)
if err != nil {
return xerrors.Errorf("failed to check if block miner was slashed: %w", err)
}
if slashed {
return xerrors.Errorf("received block was from slashed or invalid miner")
}
mpow, tpow, _, err := stmgr.GetPowerRaw(ctx, filec.sm, lbst, h.Miner)
if err != nil {
return xerrors.Errorf("failed getting power: %w", err)
}
j := h.ElectionProof.ComputeWinCount(mpow.QualityAdjPower, tpow.QualityAdjPower)
if h.ElectionProof.WinCount != j {
return xerrors.Errorf("miner claims wrong number of wins: miner: %d, computed: %d", h.ElectionProof.WinCount, j)
}
return nil
})
blockSigCheck := async.Err(func() error {
if err := verifyBlockSignature(ctx, h, waddr); err != nil {
return xerrors.Errorf("check block signature failed: %w", err)
}
return nil
})
beaconValuesCheck := async.Err(func() error {
if os.Getenv("LOTUS_IGNORE_DRAND") == "_yes_" {
return nil
}
nv := filec.sm.GetNetworkVersion(ctx, h.Height)
if err := beacon.ValidateBlockValues(filec.beacon, nv, h, baseTs.Height(), *prevBeacon); err != nil {
return xerrors.Errorf("failed to validate blocks random beacon values: %w", err)
}
return nil
})
tktsCheck := async.Err(func() error {
buf := new(bytes.Buffer)
if err := h.Miner.MarshalCBOR(buf); err != nil {
return xerrors.Errorf("failed to marshal miner address to cbor: %w", err)
}
if h.Height > build.UpgradeSmokeHeight {
buf.Write(baseTs.MinTicket().VRFProof)
}
beaconBase := *prevBeacon
if len(h.BeaconEntries) != 0 {
beaconBase = h.BeaconEntries[len(h.BeaconEntries)-1]
}
vrfBase, err := rand.DrawRandomness(beaconBase.Data, crypto.DomainSeparationTag_TicketProduction, h.Height-build.TicketRandomnessLookback, buf.Bytes())
if err != nil {
return xerrors.Errorf("failed to compute vrf base for ticket: %w", err)
}
err = VerifyElectionPoStVRF(ctx, waddr, vrfBase, h.Ticket.VRFProof)
if err != nil {
return xerrors.Errorf("validating block tickets failed: %w", err)
}
return nil
})
wproofCheck := async.Err(func() error {
if err := filec.VerifyWinningPoStProof(ctx, winPoStNv, h, *prevBeacon, lbst, waddr); err != nil {
return xerrors.Errorf("invalid election post: %w", err)
}
return nil
})
commonChecks := consensus.CommonBlkChecks(ctx, filec.sm, filec.store, b, baseTs)
await := append([]async.ErrorFuture{
minerCheck,
tktsCheck,
blockSigCheck,
beaconValuesCheck,
wproofCheck,
winnerCheck,
}, commonChecks...)
return consensus.RunAsyncChecks(ctx, await)
}
func blockSanityChecks(h *types.BlockHeader) error {
if h.ElectionProof == nil {
return xerrors.Errorf("block cannot have nil election proof")
}
if h.Ticket == nil {
return xerrors.Errorf("block cannot have nil ticket")
}
if h.BlockSig == nil {
return xerrors.Errorf("block had nil signature")
}
if h.BLSAggregate == nil {
return xerrors.Errorf("block had nil bls aggregate signature")
}
if h.Miner.Protocol() != address.ID {
return xerrors.Errorf("block had non-ID miner address")
}
return nil
}
func (filec *FilecoinEC) VerifyWinningPoStProof(ctx context.Context, nv network.Version, h *types.BlockHeader, prevBeacon types.BeaconEntry, lbst cid.Cid, waddr address.Address) error {
if build.InsecurePoStValidation {
if len(h.WinPoStProof) == 0 {
return xerrors.Errorf("[INSECURE-POST-VALIDATION] No winning post proof given")
}
if string(h.WinPoStProof[0].ProofBytes) == "valid proof" {
return nil
}
return xerrors.Errorf("[INSECURE-POST-VALIDATION] winning post was invalid")
}
buf := new(bytes.Buffer)
if err := h.Miner.MarshalCBOR(buf); err != nil {
return xerrors.Errorf("failed to marshal miner address: %w", err)
}
rbase := prevBeacon
if len(h.BeaconEntries) > 0 {
rbase = h.BeaconEntries[len(h.BeaconEntries)-1]
}
rand, err := rand.DrawRandomness(rbase.Data, crypto.DomainSeparationTag_WinningPoStChallengeSeed, h.Height, buf.Bytes())
if err != nil {
return xerrors.Errorf("failed to get randomness for verifying winning post proof: %w", err)
}
mid, err := address.IDFromAddress(h.Miner)
if err != nil {
return xerrors.Errorf("failed to get ID from miner address %s: %w", h.Miner, err)
}
xsectors, err := stmgr.GetSectorsForWinningPoSt(ctx, nv, filec.verifier, filec.sm, lbst, h.Miner, rand)
if err != nil {
return xerrors.Errorf("getting winning post sector set: %w", err)
}
sectors := make([]proof.SectorInfo, len(xsectors))
for i, xsi := range xsectors {
sectors[i] = proof.SectorInfo{
SealProof: xsi.SealProof,
SectorNumber: xsi.SectorNumber,
SealedCID: xsi.SealedCID,
}
}
ok, err := ffiwrapper.ProofVerifier.VerifyWinningPoSt(ctx, proof.WinningPoStVerifyInfo{
Randomness: rand,
Proofs: h.WinPoStProof,
ChallengedSectors: sectors,
Prover: abi.ActorID(mid),
})
if err != nil {
return xerrors.Errorf("failed to verify election post: %w", err)
}
if !ok {
log.Errorf("invalid winning post (block: %s, %x; %v)", h.Cid(), rand, sectors)
return xerrors.Errorf("winning post was invalid")
}
return nil
}
func (filec *FilecoinEC) IsEpochBeyondCurrMax(epoch abi.ChainEpoch) bool {
if filec.genesis == nil {
return false
}
now := uint64(build.Clock.Now().Unix())
return epoch > (abi.ChainEpoch((now-filec.genesis.MinTimestamp())/build.BlockDelaySecs) + MaxHeightDrift)
}
func (filec *FilecoinEC) minerIsValid(ctx context.Context, maddr address.Address, baseTs *types.TipSet) error {
act, err := filec.sm.LoadActor(ctx, power.Address, baseTs)
if err != nil {
return xerrors.Errorf("failed to load power actor: %w", err)
}
powState, err := power.Load(filec.store.ActorStore(ctx), act)
if err != nil {
return xerrors.Errorf("failed to load power actor state: %w", err)
}
_, exist, err := powState.MinerPower(maddr)
if err != nil {
return xerrors.Errorf("failed to look up miner's claim: %w", err)
}
if !exist {
return xerrors.New("miner isn't valid")
}
return nil
}
func VerifyElectionPoStVRF(ctx context.Context, worker address.Address, rand []byte, evrf []byte) error {
return VerifyVRF(ctx, worker, rand, evrf)
}
func VerifyVRF(ctx context.Context, worker address.Address, vrfBase, vrfproof []byte) error {
_, span := trace.StartSpan(ctx, "VerifyVRF")
defer span.End()
sig := &crypto.Signature{
Type: crypto.SigTypeBLS,
Data: vrfproof,
}
if err := sigs.Verify(sig, worker, vrfBase); err != nil {
return xerrors.Errorf("vrf was invalid: %w", err)
}
return nil
}
var ErrSoftFailure = errors.New("soft validation failure")
var ErrInsufficientPower = errors.New("incoming block's miner does not have minimum power")
func (filec *FilecoinEC) ValidateBlockHeader(ctx context.Context, b *types.BlockHeader) (rejectReason string, err error) {
// we want to ensure that it is a block from a known miner; we reject blocks from unknown miners
// to prevent spam attacks.
// the logic works as follows: we lookup the miner in the chain for its key.
// if we can find it then it's a known miner and we can validate the signature.
// if we can't find it, we check whether we are (near) synced in the chain.
// if we are not synced we cannot validate the block and we must ignore it.
// if we are synced and the miner is unknown, then the block is rejcected.
key, err := filec.checkPowerAndGetWorkerKey(ctx, b)
if err != nil {
if err != ErrSoftFailure && filec.isChainNearSynced() {
log.Warnf("received block from unknown miner or miner that doesn't meet min power over pubsub; rejecting message")
return "unknown_miner", err
}
log.Warnf("cannot validate block message; unknown miner or miner that doesn't meet min power in unsynced chain: %s", b.Cid())
return "", err // ignore
}
if b.ElectionProof.WinCount < 1 {
log.Errorf("block is not claiming to be winning")
return "not_winning", xerrors.Errorf("block not winning")
}
err = sigs.CheckBlockSignature(ctx, b, key)
if err != nil {
log.Errorf("block signature verification failed: %s", err)
return "signature_verification_failed", err
}
return "", nil
}
func (filec *FilecoinEC) checkPowerAndGetWorkerKey(ctx context.Context, bh *types.BlockHeader) (address.Address, error) {
// we check that the miner met the minimum power at the lookback tipset
baseTs := filec.store.GetHeaviestTipSet()
lbts, lbst, err := stmgr.GetLookbackTipSetForRound(ctx, filec.sm, baseTs, bh.Height)
if err != nil {
log.Warnf("failed to load lookback tipset for incoming block: %s", err)
return address.Undef, ErrSoftFailure
}
key, err := stmgr.GetMinerWorkerRaw(ctx, filec.sm, lbst, bh.Miner)
if err != nil {
log.Warnf("failed to resolve worker key for miner %s and block height %d: %s", bh.Miner, bh.Height, err)
return address.Undef, ErrSoftFailure
}
// NOTE: we check to see if the miner was eligible in the lookback
// tipset - 1 for historical reasons. DO NOT use the lookback state
// returned by GetLookbackTipSetForRound.
eligible, err := stmgr.MinerEligibleToMine(ctx, filec.sm, bh.Miner, baseTs, lbts)
if err != nil {
log.Warnf("failed to determine if incoming block's miner has minimum power: %s", err)
return address.Undef, ErrSoftFailure
}
if !eligible {
log.Warnf("incoming block's miner is ineligible")
return address.Undef, ErrInsufficientPower
}
return key, nil
}
func (filec *FilecoinEC) isChainNearSynced() bool {
ts := filec.store.GetHeaviestTipSet()
timestamp := ts.MinTimestamp()
timestampTime := time.Unix(int64(timestamp), 0)
return build.Clock.Since(timestampTime) < 6*time.Hour
}
func verifyBlockSignature(ctx context.Context, h *types.BlockHeader,
addr address.Address) error {
return sigs.CheckBlockSignature(ctx, h, addr)
}
func signBlock(ctx context.Context, w api.Wallet,
addr address.Address, next *types.BlockHeader) error {
nosigbytes, err := next.SigningBytes()
if err != nil {
return xerrors.Errorf("failed to get signing bytes for block: %w", err)
}
sig, err := w.WalletSign(ctx, addr, nosigbytes, api.MsgMeta{
Type: api.MTBlock,
})
if err != nil {
return xerrors.Errorf("failed to sign new block: %w", err)
}
next.BlockSig = sig
return nil
}
var _ consensus.Consensus = &FilecoinEC{}