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Fix randomness fetching around null blocks

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This commit is contained in:
Aayush Rajasekaran 2021-05-26 19:03:46 -04:00
parent 2b93bcde72
commit 21b4741e30
11 changed files with 314 additions and 74 deletions
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34
chain/gen/gen.go
View File

@ -78,6 +78,7 @@ type ChainGen struct {
eppProvs map[address.Address]WinningPoStProver eppProvs map[address.Address]WinningPoStProver
Miners []address.Address Miners []address.Address
receivers []address.Address receivers []address.Address
// a SecP address
banker address.Address banker address.Address
bankerNonce uint64 bankerNonce uint64
@ -110,7 +111,7 @@ var DefaultRemainderAccountActor = genesis.Actor{
Meta: remAccMeta.ActorMeta(), Meta: remAccMeta.ActorMeta(),
} }
func NewGeneratorWithSectors(numSectors int) (*ChainGen, error) { func NewGeneratorWithSectorsAndUpgradeSchedule(numSectors int, us stmgr.UpgradeSchedule) (*ChainGen, error) {
j := journal.NilJournal() j := journal.NilJournal()
// TODO: we really shouldn't modify a global variable here. // TODO: we really shouldn't modify a global variable here.
policy.SetSupportedProofTypes(abi.RegisteredSealProof_StackedDrg2KiBV1) policy.SetSupportedProofTypes(abi.RegisteredSealProof_StackedDrg2KiBV1)
@ -244,7 +245,10 @@ func NewGeneratorWithSectors(numSectors int) (*ChainGen, error) {
mgen[genesis2.MinerAddress(uint64(i))] = &wppProvider{} mgen[genesis2.MinerAddress(uint64(i))] = &wppProvider{}
} }
sm := stmgr.NewStateManager(cs) sm, err := stmgr.NewStateManagerWithUpgradeSchedule(cs, us)
if err != nil {
return nil, xerrors.Errorf("initing stmgr: %w", err)
}
miners := []address.Address{maddr1, maddr2} miners := []address.Address{maddr1, maddr2}
@ -282,6 +286,14 @@ func NewGenerator() (*ChainGen, error) {
return NewGeneratorWithSectors(1) return NewGeneratorWithSectors(1)
} }
func NewGeneratorWithSectors(numSectors int) (*ChainGen, error) {
return NewGeneratorWithSectorsAndUpgradeSchedule(numSectors, stmgr.DefaultUpgradeSchedule())
}
func NewGeneratorWithUpgradeSchedule(us stmgr.UpgradeSchedule) (*ChainGen, error) {
return NewGeneratorWithSectorsAndUpgradeSchedule(1, us)
}
func (cg *ChainGen) StateManager() *stmgr.StateManager { func (cg *ChainGen) StateManager() *stmgr.StateManager {
return cg.sm return cg.sm
} }
@ -384,7 +396,7 @@ type MinedTipSet struct {
} }
func (cg *ChainGen) NextTipSet() (*MinedTipSet, error) { func (cg *ChainGen) NextTipSet() (*MinedTipSet, error) {
mts, err := cg.NextTipSetFromMiners(cg.CurTipset.TipSet(), cg.Miners) mts, err := cg.NextTipSetFromMiners(cg.CurTipset.TipSet(), cg.Miners, 0)
if err != nil { if err != nil {
return nil, err return nil, err
} }
@ -397,7 +409,7 @@ func (cg *ChainGen) SetWinningPoStProver(m address.Address, wpp WinningPoStProve
cg.eppProvs[m] = wpp cg.eppProvs[m] = wpp
} }
func (cg *ChainGen) NextTipSetFromMiners(base *types.TipSet, miners []address.Address) (*MinedTipSet, error) { func (cg *ChainGen) NextTipSetFromMiners(base *types.TipSet, miners []address.Address, nulls abi.ChainEpoch) (*MinedTipSet, error) {
ms, err := cg.GetMessages(cg) ms, err := cg.GetMessages(cg)
if err != nil { if err != nil {
return nil, xerrors.Errorf("get random messages: %w", err) return nil, xerrors.Errorf("get random messages: %w", err)
@ -408,21 +420,23 @@ func (cg *ChainGen) NextTipSetFromMiners(base *types.TipSet, miners []address.Ad
msgs[i] = ms msgs[i] = ms
} }
fts, err := cg.NextTipSetFromMinersWithMessages(base, miners, msgs) fts, err := cg.NextTipSetFromMinersWithMessagesAndNulls(base, miners, msgs, nulls)
if err != nil { if err != nil {
return nil, err return nil, err
} }
cg.CurTipset = fts
return &MinedTipSet{ return &MinedTipSet{
TipSet: fts, TipSet: fts,
Messages: ms, Messages: ms,
}, nil }, nil
} }
func (cg *ChainGen) NextTipSetFromMinersWithMessages(base *types.TipSet, miners []address.Address, msgs [][]*types.SignedMessage) (*store.FullTipSet, error) { func (cg *ChainGen) NextTipSetFromMinersWithMessagesAndNulls(base *types.TipSet, miners []address.Address, msgs [][]*types.SignedMessage, nulls abi.ChainEpoch) (*store.FullTipSet, error) {
var blks []*types.FullBlock var blks []*types.FullBlock
for round := base.Height() + 1; len(blks) == 0; round++ { for round := base.Height() + nulls + 1; len(blks) == 0; round++ {
for mi, m := range miners { for mi, m := range miners {
bvals, et, ticket, err := cg.nextBlockProof(context.TODO(), base, m, round) bvals, et, ticket, err := cg.nextBlockProof(context.TODO(), base, m, round)
if err != nil { if err != nil {
@ -455,6 +469,8 @@ func (cg *ChainGen) NextTipSetFromMinersWithMessages(base *types.TipSet, miners
return nil, err return nil, err
} }
cg.CurTipset = fts
return fts, nil return fts, nil
} }
@ -574,7 +590,7 @@ func (mca mca) ChainGetRandomnessFromTickets(ctx context.Context, tsk types.TipS
return nil, xerrors.Errorf("loading tipset key: %w", err) return nil, xerrors.Errorf("loading tipset key: %w", err)
} }
return mca.sm.ChainStore().GetChainRandomness(ctx, pts.Cids(), personalization, randEpoch, entropy) return mca.sm.ChainStore().GetChainRandomnessLookingBack(ctx, pts.Cids(), personalization, randEpoch, entropy)
} }
func (mca mca) ChainGetRandomnessFromBeacon(ctx context.Context, tsk types.TipSetKey, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) (abi.Randomness, error) { func (mca mca) ChainGetRandomnessFromBeacon(ctx context.Context, tsk types.TipSetKey, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) (abi.Randomness, error) {
@ -583,7 +599,7 @@ func (mca mca) ChainGetRandomnessFromBeacon(ctx context.Context, tsk types.TipSe
return nil, xerrors.Errorf("loading tipset key: %w", err) return nil, xerrors.Errorf("loading tipset key: %w", err)
} }
return mca.sm.ChainStore().GetBeaconRandomness(ctx, pts.Cids(), personalization, randEpoch, entropy) return mca.sm.ChainStore().GetBeaconRandomnessLookingBack(ctx, pts.Cids(), personalization, randEpoch, entropy)
} }
func (mca mca) MinerGetBaseInfo(ctx context.Context, maddr address.Address, epoch abi.ChainEpoch, tsk types.TipSetKey) (*api.MiningBaseInfo, error) { func (mca mca) MinerGetBaseInfo(ctx context.Context, maddr address.Address, epoch abi.ChainEpoch, tsk types.TipSetKey) (*api.MiningBaseInfo, error) {

16
chain/gen/genesis/miners.go
View File

@ -335,13 +335,25 @@ func SetupStorageMiners(ctx context.Context, cs *store.ChainStore, sroot cid.Cid
// TODO: copied from actors test harness, deduplicate or remove from here // TODO: copied from actors test harness, deduplicate or remove from here
type fakeRand struct{} type fakeRand struct{}
func (fr *fakeRand) GetChainRandomness(ctx context.Context, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) ([]byte, error) { func (fr *fakeRand) GetChainRandomnessLookingForward(ctx context.Context, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) ([]byte, error) {
out := make([]byte, 32) out := make([]byte, 32)
_, _ = rand.New(rand.NewSource(int64(randEpoch * 1000))).Read(out) //nolint _, _ = rand.New(rand.NewSource(int64(randEpoch * 1000))).Read(out) //nolint
return out, nil return out, nil
} }
func (fr *fakeRand) GetBeaconRandomness(ctx context.Context, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) ([]byte, error) { func (fr *fakeRand) GetChainRandomnessLookingBack(ctx context.Context, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) ([]byte, error) {
out := make([]byte, 32)
_, _ = rand.New(rand.NewSource(int64(randEpoch * 1000))).Read(out) //nolint
return out, nil
}
func (fr *fakeRand) GetBeaconRandomnessLookingForward(ctx context.Context, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) ([]byte, error) {
out := make([]byte, 32)
_, _ = rand.New(rand.NewSource(int64(randEpoch))).Read(out) //nolint
return out, nil
}
func (fr *fakeRand) GetBeaconRandomnessLookingBack(ctx context.Context, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) ([]byte, error) {
out := make([]byte, 32) out := make([]byte, 32)
_, _ = rand.New(rand.NewSource(int64(randEpoch))).Read(out) //nolint _, _ = rand.New(rand.NewSource(int64(randEpoch))).Read(out) //nolint
return out, nil return out, nil

40
chain/store/store.go
View File

@ -1280,7 +1280,15 @@ func DrawRandomness(rbase []byte, pers crypto.DomainSeparationTag, round abi.Cha
return h.Sum(nil), nil return h.Sum(nil), nil
} }
func (cs *ChainStore) GetBeaconRandomness(ctx context.Context, blks []cid.Cid, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) { func (cs *ChainStore) GetBeaconRandomnessLookingBack(ctx context.Context, blks []cid.Cid, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return cs.GetBeaconRandomness(ctx, blks, pers, round, entropy, true)
}
func (cs *ChainStore) GetBeaconRandomnessLookingForward(ctx context.Context, blks []cid.Cid, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return cs.GetBeaconRandomness(ctx, blks, pers, round, entropy, false)
}
func (cs *ChainStore) GetBeaconRandomness(ctx context.Context, blks []cid.Cid, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte, lookback bool) ([]byte, error) {
_, span := trace.StartSpan(ctx, "store.GetBeaconRandomness") _, span := trace.StartSpan(ctx, "store.GetBeaconRandomness")
defer span.End() defer span.End()
span.AddAttributes(trace.Int64Attribute("round", int64(round))) span.AddAttributes(trace.Int64Attribute("round", int64(round)))
@ -1299,7 +1307,7 @@ func (cs *ChainStore) GetBeaconRandomness(ctx context.Context, blks []cid.Cid, p
searchHeight = 0 searchHeight = 0
} }
randTs, err := cs.GetTipsetByHeight(ctx, searchHeight, ts, true) randTs, err := cs.GetTipsetByHeight(ctx, searchHeight, ts, lookback)
if err != nil { if err != nil {
return nil, err return nil, err
} }
@ -1314,7 +1322,15 @@ func (cs *ChainStore) GetBeaconRandomness(ctx context.Context, blks []cid.Cid, p
return DrawRandomness(be.Data, pers, round, entropy) return DrawRandomness(be.Data, pers, round, entropy)
} }
func (cs *ChainStore) GetChainRandomness(ctx context.Context, blks []cid.Cid, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) { func (cs *ChainStore) GetChainRandomnessLookingBack(ctx context.Context, blks []cid.Cid, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return cs.GetChainRandomness(ctx, blks, pers, round, entropy, true)
}
func (cs *ChainStore) GetChainRandomnessLookingForward(ctx context.Context, blks []cid.Cid, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return cs.GetChainRandomness(ctx, blks, pers, round, entropy, false)
}
func (cs *ChainStore) GetChainRandomness(ctx context.Context, blks []cid.Cid, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte, lookback bool) ([]byte, error) {
_, span := trace.StartSpan(ctx, "store.GetChainRandomness") _, span := trace.StartSpan(ctx, "store.GetChainRandomness")
defer span.End() defer span.End()
span.AddAttributes(trace.Int64Attribute("round", int64(round))) span.AddAttributes(trace.Int64Attribute("round", int64(round)))
@ -1333,7 +1349,7 @@ func (cs *ChainStore) GetChainRandomness(ctx context.Context, blks []cid.Cid, pe
searchHeight = 0 searchHeight = 0
} }
randTs, err := cs.GetTipsetByHeight(ctx, searchHeight, ts, true) randTs, err := cs.GetTipsetByHeight(ctx, searchHeight, ts, lookback)
if err != nil { if err != nil {
return nil, err return nil, err
} }
@ -1608,12 +1624,20 @@ func NewChainRand(cs *ChainStore, blks []cid.Cid) vm.Rand {
} }
} }
func (cr *chainRand) GetChainRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) { func (cr *chainRand) GetChainRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return cr.cs.GetChainRandomness(ctx, cr.blks, pers, round, entropy) return cr.cs.GetChainRandomnessLookingBack(ctx, cr.blks, pers, round, entropy)
} }
func (cr *chainRand) GetBeaconRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) { func (cr *chainRand) GetChainRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return cr.cs.GetBeaconRandomness(ctx, cr.blks, pers, round, entropy) return cr.cs.GetChainRandomnessLookingForward(ctx, cr.blks, pers, round, entropy)
}
func (cr *chainRand) GetBeaconRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return cr.cs.GetBeaconRandomnessLookingBack(ctx, cr.blks, pers, round, entropy)
}
func (cr *chainRand) GetBeaconRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return cr.cs.GetBeaconRandomnessLookingForward(ctx, cr.blks, pers, round, entropy)
} }
func (cs *ChainStore) GetTipSetFromKey(tsk types.TipSetKey) (*types.TipSet, error) { func (cs *ChainStore) GetTipSetFromKey(tsk types.TipSetKey) (*types.TipSet, error) {

2
chain/store/store_test.go
View File

@ -76,7 +76,7 @@ func BenchmarkGetRandomness(b *testing.B) {
b.ResetTimer() b.ResetTimer()
for i := 0; i < b.N; i++ { for i := 0; i < b.N; i++ {
_, err := cs.GetChainRandomness(context.TODO(), last.Cids(), crypto.DomainSeparationTag_SealRandomness, 500, nil) _, err := cs.GetChainRandomnessLookingBack(context.TODO(), last.Cids(), crypto.DomainSeparationTag_SealRandomness, 500, nil)
if err != nil { if err != nil {
b.Fatal(err) b.Fatal(err)
} }

180
chain/sync_test.go
View File

@ -7,6 +7,12 @@ import (
"testing" "testing"
"time" "time"
"github.com/filecoin-project/go-state-types/crypto"
"github.com/filecoin-project/go-state-types/network"
"github.com/filecoin-project/lotus/chain/stmgr"
"github.com/ipfs/go-cid" "github.com/ipfs/go-cid"
ds "github.com/ipfs/go-datastore" ds "github.com/ipfs/go-datastore"
@ -101,7 +107,7 @@ func prepSyncTest(t testing.TB, h int) *syncTestUtil {
g: g, g: g,
} }
tu.addSourceNode(h) tu.addSourceNode(stmgr.DefaultUpgradeSchedule(), h)
//tu.checkHeight("source", source, h) //tu.checkHeight("source", source, h)
// separate logs // separate logs
@ -110,6 +116,53 @@ func prepSyncTest(t testing.TB, h int) *syncTestUtil {
return tu return tu
} }
func prepSyncTestWithV5Height(t testing.TB, h int, v5height abi.ChainEpoch) *syncTestUtil {
logging.SetLogLevel("*", "INFO")
us := stmgr.UpgradeSchedule{{
// prepare for upgrade.
Network: network.Version9,
Height: 1,
Migration: stmgr.UpgradeActorsV2,
}, {
Network: network.Version10,
Height: 2,
Migration: stmgr.UpgradeActorsV3,
}, {
Network: network.Version12,
Height: 3,
Migration: stmgr.UpgradeActorsV4,
}, {
Network: network.Version13,
Height: v5height,
Migration: stmgr.UpgradeActorsV5,
}}
g, err := gen.NewGeneratorWithUpgradeSchedule(us)
if err != nil {
t.Fatalf("%+v", err)
}
ctx, cancel := context.WithCancel(context.Background())
tu := &syncTestUtil{
t: t,
ctx: ctx,
cancel: cancel,
mn: mocknet.New(ctx),
g: g,
}
tu.addSourceNode(us, h)
//tu.checkHeight("source", source, h)
// separate logs
fmt.Println("\x1b[31m///////////////////////////////////////////////////\x1b[39b")
return tu
}
func (tu *syncTestUtil) Shutdown() { func (tu *syncTestUtil) Shutdown() {
tu.cancel() tu.cancel()
} }
@ -174,7 +227,7 @@ func (tu *syncTestUtil) pushTsExpectErr(to int, fts *store.FullTipSet, experr bo
} }
} }
func (tu *syncTestUtil) mineOnBlock(blk *store.FullTipSet, to int, miners []int, wait, fail bool, msgs [][]*types.SignedMessage) *store.FullTipSet { func (tu *syncTestUtil) mineOnBlock(blk *store.FullTipSet, to int, miners []int, wait, fail bool, msgs [][]*types.SignedMessage, nulls abi.ChainEpoch) *store.FullTipSet {
if miners == nil { if miners == nil {
for i := range tu.g.Miners { for i := range tu.g.Miners {
miners = append(miners, i) miners = append(miners, i)
@ -191,10 +244,10 @@ func (tu *syncTestUtil) mineOnBlock(blk *store.FullTipSet, to int, miners []int,
var nts *store.FullTipSet var nts *store.FullTipSet
var err error var err error
if msgs != nil { if msgs != nil {
nts, err = tu.g.NextTipSetFromMinersWithMessages(blk.TipSet(), maddrs, msgs) nts, err = tu.g.NextTipSetFromMinersWithMessagesAndNulls(blk.TipSet(), maddrs, msgs, 0)
require.NoError(tu.t, err) require.NoError(tu.t, err)
} else { } else {
mt, err := tu.g.NextTipSetFromMiners(blk.TipSet(), maddrs) mt, err := tu.g.NextTipSetFromMiners(blk.TipSet(), maddrs, nulls)
require.NoError(tu.t, err) require.NoError(tu.t, err)
nts = mt.TipSet nts = mt.TipSet
} }
@ -209,11 +262,11 @@ func (tu *syncTestUtil) mineOnBlock(blk *store.FullTipSet, to int, miners []int,
} }
func (tu *syncTestUtil) mineNewBlock(src int, miners []int) { func (tu *syncTestUtil) mineNewBlock(src int, miners []int) {
mts := tu.mineOnBlock(tu.g.CurTipset, src, miners, true, false, nil) mts := tu.mineOnBlock(tu.g.CurTipset, src, miners, true, false, nil, 0)
tu.g.CurTipset = mts tu.g.CurTipset = mts
} }
func (tu *syncTestUtil) addSourceNode(gen int) { func (tu *syncTestUtil) addSourceNode(us stmgr.UpgradeSchedule, gen int) {
if tu.genesis != nil { if tu.genesis != nil {
tu.t.Fatal("source node already exists") tu.t.Fatal("source node already exists")
} }
@ -229,6 +282,7 @@ func (tu *syncTestUtil) addSourceNode(gen int) {
node.Test(), node.Test(),
node.Override(new(modules.Genesis), modules.LoadGenesis(genesis)), node.Override(new(modules.Genesis), modules.LoadGenesis(genesis)),
node.Override(new(stmgr.UpgradeSchedule), us),
) )
require.NoError(tu.t, err) require.NoError(tu.t, err)
tu.t.Cleanup(func() { _ = stop(context.Background()) }) tu.t.Cleanup(func() { _ = stop(context.Background()) })
@ -442,7 +496,7 @@ func TestSyncBadTimestamp(t *testing.T) {
fmt.Println("BASE: ", base.Cids()) fmt.Println("BASE: ", base.Cids())
tu.printHeads() tu.printHeads()
a1 := tu.mineOnBlock(base, 0, nil, false, true, nil) a1 := tu.mineOnBlock(base, 0, nil, false, true, nil, 0)
tu.g.Timestamper = nil tu.g.Timestamper = nil
require.NoError(t, tu.g.ResyncBankerNonce(a1.TipSet())) require.NoError(t, tu.g.ResyncBankerNonce(a1.TipSet()))
@ -451,7 +505,7 @@ func TestSyncBadTimestamp(t *testing.T) {
fmt.Println("After mine bad block!") fmt.Println("After mine bad block!")
tu.printHeads() tu.printHeads()
a2 := tu.mineOnBlock(base, 0, nil, true, false, nil) a2 := tu.mineOnBlock(base, 0, nil, true, false, nil, 0)
tu.waitUntilSync(0, client) tu.waitUntilSync(0, client)
@ -495,7 +549,7 @@ func TestSyncBadWinningPoSt(t *testing.T) {
tu.g.SetWinningPoStProver(tu.g.Miners[1], &badWpp{}) tu.g.SetWinningPoStProver(tu.g.Miners[1], &badWpp{})
// now ensure that new blocks are not accepted // now ensure that new blocks are not accepted
tu.mineOnBlock(base, client, nil, false, true, nil) tu.mineOnBlock(base, client, nil, false, true, nil, 0)
} }
func (tu *syncTestUtil) loadChainToNode(to int) { func (tu *syncTestUtil) loadChainToNode(to int) {
@ -540,16 +594,16 @@ func TestSyncFork(t *testing.T) {
fmt.Println("Mining base: ", base.TipSet().Cids(), base.TipSet().Height()) fmt.Println("Mining base: ", base.TipSet().Cids(), base.TipSet().Height())
// The two nodes fork at this point into 'a' and 'b' // The two nodes fork at this point into 'a' and 'b'
a1 := tu.mineOnBlock(base, p1, []int{0}, true, false, nil) a1 := tu.mineOnBlock(base, p1, []int{0}, true, false, nil, 0)
a := tu.mineOnBlock(a1, p1, []int{0}, true, false, nil) a := tu.mineOnBlock(a1, p1, []int{0}, true, false, nil, 0)
a = tu.mineOnBlock(a, p1, []int{0}, true, false, nil) a = tu.mineOnBlock(a, p1, []int{0}, true, false, nil, 0)
require.NoError(t, tu.g.ResyncBankerNonce(a1.TipSet())) require.NoError(t, tu.g.ResyncBankerNonce(a1.TipSet()))
// chain B will now be heaviest // chain B will now be heaviest
b := tu.mineOnBlock(base, p2, []int{1}, true, false, nil) b := tu.mineOnBlock(base, p2, []int{1}, true, false, nil, 0)
b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil) b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil, 0)
b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil) b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil, 0)
b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil) b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil, 0)
fmt.Println("A: ", a.Cids(), a.TipSet().Height()) fmt.Println("A: ", a.Cids(), a.TipSet().Height())
fmt.Println("B: ", b.Cids(), b.TipSet().Height()) fmt.Println("B: ", b.Cids(), b.TipSet().Height())
@ -611,13 +665,13 @@ func TestDuplicateNonce(t *testing.T) {
msgs[k] = []*types.SignedMessage{makeMsg(tu.g.Miners[k])} msgs[k] = []*types.SignedMessage{makeMsg(tu.g.Miners[k])}
} }
ts1 := tu.mineOnBlock(base, 0, []int{0, 1}, true, false, msgs) ts1 := tu.mineOnBlock(base, 0, []int{0, 1}, true, false, msgs, 0)
tu.waitUntilSyncTarget(0, ts1.TipSet()) tu.waitUntilSyncTarget(0, ts1.TipSet())
// mine another tipset // mine another tipset
ts2 := tu.mineOnBlock(ts1, 0, []int{0, 1}, true, false, make([][]*types.SignedMessage, 2)) ts2 := tu.mineOnBlock(ts1, 0, []int{0, 1}, true, false, make([][]*types.SignedMessage, 2), 0)
tu.waitUntilSyncTarget(0, ts2.TipSet()) tu.waitUntilSyncTarget(0, ts2.TipSet())
var includedMsg cid.Cid var includedMsg cid.Cid
@ -668,11 +722,15 @@ func TestBadNonce(t *testing.T) {
base := tu.g.CurTipset base := tu.g.CurTipset
// Get the banker from computed tipset state, not the parent.
st, _, err := tu.g.StateManager().TipSetState(context.TODO(), base.TipSet())
require.NoError(t, err)
ba, err := tu.g.StateManager().LoadActorRaw(context.TODO(), tu.g.Banker(), st)
require.NoError(t, err)
// Produce a message from the banker with a bad nonce // Produce a message from the banker with a bad nonce
makeBadMsg := func() *types.SignedMessage { makeBadMsg := func() *types.SignedMessage {
ba, err := tu.nds[0].StateGetActor(context.TODO(), tu.g.Banker(), base.TipSet().Key())
require.NoError(t, err)
msg := types.Message{ msg := types.Message{
To: tu.g.Banker(), To: tu.g.Banker(),
From: tu.g.Banker(), From: tu.g.Banker(),
@ -700,7 +758,7 @@ func TestBadNonce(t *testing.T) {
msgs := make([][]*types.SignedMessage, 1) msgs := make([][]*types.SignedMessage, 1)
msgs[0] = []*types.SignedMessage{makeBadMsg()} msgs[0] = []*types.SignedMessage{makeBadMsg()}
tu.mineOnBlock(base, 0, []int{0}, true, true, msgs) tu.mineOnBlock(base, 0, []int{0}, true, true, msgs, 0)
} }
func BenchmarkSyncBasic(b *testing.B) { func BenchmarkSyncBasic(b *testing.B) {
@ -765,19 +823,19 @@ func TestSyncCheckpointHead(t *testing.T) {
fmt.Println("Mining base: ", base.TipSet().Cids(), base.TipSet().Height()) fmt.Println("Mining base: ", base.TipSet().Cids(), base.TipSet().Height())
// The two nodes fork at this point into 'a' and 'b' // The two nodes fork at this point into 'a' and 'b'
a1 := tu.mineOnBlock(base, p1, []int{0}, true, false, nil) a1 := tu.mineOnBlock(base, p1, []int{0}, true, false, nil, 0)
a := tu.mineOnBlock(a1, p1, []int{0}, true, false, nil) a := tu.mineOnBlock(a1, p1, []int{0}, true, false, nil, 0)
a = tu.mineOnBlock(a, p1, []int{0}, true, false, nil) a = tu.mineOnBlock(a, p1, []int{0}, true, false, nil, 0)
tu.waitUntilSyncTarget(p1, a.TipSet()) tu.waitUntilSyncTarget(p1, a.TipSet())
tu.checkpointTs(p1, a.TipSet().Key()) tu.checkpointTs(p1, a.TipSet().Key())
require.NoError(t, tu.g.ResyncBankerNonce(a1.TipSet())) require.NoError(t, tu.g.ResyncBankerNonce(a1.TipSet()))
// chain B will now be heaviest // chain B will now be heaviest
b := tu.mineOnBlock(base, p2, []int{1}, true, false, nil) b := tu.mineOnBlock(base, p2, []int{1}, true, false, nil, 0)
b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil) b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil, 0)
b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil) b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil, 0)
b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil) b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil, 0)
fmt.Println("A: ", a.Cids(), a.TipSet().Height()) fmt.Println("A: ", a.Cids(), a.TipSet().Height())
fmt.Println("B: ", b.Cids(), b.TipSet().Height()) fmt.Println("B: ", b.Cids(), b.TipSet().Height())
@ -807,19 +865,19 @@ func TestSyncCheckpointEarlierThanHead(t *testing.T) {
fmt.Println("Mining base: ", base.TipSet().Cids(), base.TipSet().Height()) fmt.Println("Mining base: ", base.TipSet().Cids(), base.TipSet().Height())
// The two nodes fork at this point into 'a' and 'b' // The two nodes fork at this point into 'a' and 'b'
a1 := tu.mineOnBlock(base, p1, []int{0}, true, false, nil) a1 := tu.mineOnBlock(base, p1, []int{0}, true, false, nil, 0)
a := tu.mineOnBlock(a1, p1, []int{0}, true, false, nil) a := tu.mineOnBlock(a1, p1, []int{0}, true, false, nil, 0)
a = tu.mineOnBlock(a, p1, []int{0}, true, false, nil) a = tu.mineOnBlock(a, p1, []int{0}, true, false, nil, 0)
tu.waitUntilSyncTarget(p1, a.TipSet()) tu.waitUntilSyncTarget(p1, a.TipSet())
tu.checkpointTs(p1, a1.TipSet().Key()) tu.checkpointTs(p1, a1.TipSet().Key())
require.NoError(t, tu.g.ResyncBankerNonce(a1.TipSet())) require.NoError(t, tu.g.ResyncBankerNonce(a1.TipSet()))
// chain B will now be heaviest // chain B will now be heaviest
b := tu.mineOnBlock(base, p2, []int{1}, true, false, nil) b := tu.mineOnBlock(base, p2, []int{1}, true, false, nil, 0)
b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil) b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil, 0)
b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil) b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil, 0)
b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil) b = tu.mineOnBlock(b, p2, []int{1}, true, false, nil, 0)
fmt.Println("A: ", a.Cids(), a.TipSet().Height()) fmt.Println("A: ", a.Cids(), a.TipSet().Height())
fmt.Println("B: ", b.Cids(), b.TipSet().Height()) fmt.Println("B: ", b.Cids(), b.TipSet().Height())
@ -833,3 +891,55 @@ func TestSyncCheckpointEarlierThanHead(t *testing.T) {
require.Equal(tu.t, p1Head, a.TipSet()) require.Equal(tu.t, p1Head, a.TipSet())
tu.assertBad(p1, b.TipSet()) tu.assertBad(p1, b.TipSet())
} }
func TestDrandNull(t *testing.T) {
H := 10
v5h := abi.ChainEpoch(50)
build.UpgradeHyperdriveHeight = v5h
tu := prepSyncTestWithV5Height(t, H, v5h)
entropy := []byte{0, 2, 3, 4}
// arbitrarily chosen
pers := crypto.DomainSeparationTag_WinningPoStChallengeSeed
beforeNull := tu.g.CurTipset
afterNull := tu.mineOnBlock(beforeNull, 0, nil, false, false, nil, 2)
nullHeight := beforeNull.TipSet().Height() + 1
if afterNull.TipSet().Height() == nullHeight {
t.Fatal("didn't inject nulls as expected")
}
rand, err := tu.nds[0].ChainGetRandomnessFromBeacon(tu.ctx, afterNull.TipSet().Key(), pers, nullHeight, entropy)
require.NoError(t, err)
// calculate the expected randomness based on the beacon BEFORE the null
expectedBE := beforeNull.Blocks[0].Header.BeaconEntries
expectedRand, err := store.DrawRandomness(expectedBE[len(expectedBE)-1].Data, pers, nullHeight, entropy)
require.NoError(t, err)
require.Equal(t, []byte(rand), expectedRand)
// zoom zoom to past the v5 upgrade by injecting many many nulls
postUpgrade := tu.mineOnBlock(afterNull, 0, nil, false, false, nil, v5h)
nv, err := tu.nds[0].StateNetworkVersion(tu.ctx, types.EmptyTSK)
require.NoError(t, err)
if nv != network.Version13 {
t.Fatal("expect to be v13 by now")
}
afterNull = tu.mineOnBlock(postUpgrade, 0, nil, false, false, nil, 2)
nullHeight = postUpgrade.TipSet().Height() + 1
if afterNull.TipSet().Height() == nullHeight {
t.Fatal("didn't inject nulls as expected")
}
rand, err = tu.nds[0].ChainGetRandomnessFromBeacon(tu.ctx, afterNull.TipSet().Key(), pers, nullHeight, entropy)
require.NoError(t, err)
// calculate the expected randomness based on the beacon AFTER the null
expectedBE = afterNull.Blocks[0].Header.BeaconEntries
expectedRand, err = store.DrawRandomness(expectedBE[len(expectedBE)-1].Data, pers, nullHeight, entropy)
require.NoError(t, err)
require.Equal(t, []byte(rand), expectedRand)
}

22
chain/vm/runtime.go
View File

@ -208,17 +208,31 @@ func (rt *Runtime) GetActorCodeCID(addr address.Address) (ret cid.Cid, ok bool)
} }
func (rt *Runtime) GetRandomnessFromTickets(personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) abi.Randomness { func (rt *Runtime) GetRandomnessFromTickets(personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) abi.Randomness {
res, err := rt.vm.rand.GetChainRandomness(rt.ctx, personalization, randEpoch, entropy) var err error
var res []byte
if rt.vm.GetNtwkVersion(rt.ctx, randEpoch) >= network.Version13 {
res, err = rt.vm.rand.GetChainRandomnessLookingForward(rt.ctx, personalization, randEpoch, entropy)
} else {
res, err = rt.vm.rand.GetChainRandomnessLookingBack(rt.ctx, personalization, randEpoch, entropy)
}
if err != nil { if err != nil {
panic(aerrors.Fatalf("could not get randomness: %s", err)) panic(aerrors.Fatalf("could not get ticket randomness: %s", err))
} }
return res return res
} }
func (rt *Runtime) GetRandomnessFromBeacon(personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) abi.Randomness { func (rt *Runtime) GetRandomnessFromBeacon(personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) abi.Randomness {
res, err := rt.vm.rand.GetBeaconRandomness(rt.ctx, personalization, randEpoch, entropy) var err error
var res []byte
if rt.vm.GetNtwkVersion(rt.ctx, randEpoch) >= network.Version13 {
res, err = rt.vm.rand.GetBeaconRandomnessLookingForward(rt.ctx, personalization, randEpoch, entropy)
} else {
res, err = rt.vm.rand.GetBeaconRandomnessLookingBack(rt.ctx, personalization, randEpoch, entropy)
}
if err != nil { if err != nil {
panic(aerrors.Fatalf("could not get randomness: %s", err)) panic(aerrors.Fatalf("could not get beacon randomness: %s", err))
} }
return res return res
} }

6
chain/vm/vm.go
View File

@ -255,8 +255,10 @@ func NewVM(ctx context.Context, opts *VMOpts) (*VM, error) {
} }
type Rand interface { type Rand interface {
GetChainRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) GetChainRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error)
GetBeaconRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) GetChainRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error)
GetBeaconRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error)
GetBeaconRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error)
} }
type ApplyRet struct { type ApplyRet struct {

12
conformance/rand_fixed.go
View File

@ -19,10 +19,18 @@ func NewFixedRand() vm.Rand {
return &fixedRand{} return &fixedRand{}
} }
func (r *fixedRand) GetChainRandomness(_ context.Context, _ crypto.DomainSeparationTag, _ abi.ChainEpoch, _ []byte) ([]byte, error) { func (r *fixedRand) GetChainRandomnessLookingForward(_ context.Context, _ crypto.DomainSeparationTag, _ abi.ChainEpoch, _ []byte) ([]byte, error) {
return []byte("i_am_random_____i_am_random_____"), nil // 32 bytes. return []byte("i_am_random_____i_am_random_____"), nil // 32 bytes.
} }
func (r *fixedRand) GetBeaconRandomness(_ context.Context, _ crypto.DomainSeparationTag, _ abi.ChainEpoch, _ []byte) ([]byte, error) { func (r *fixedRand) GetChainRandomnessLookingBack(_ context.Context, _ crypto.DomainSeparationTag, _ abi.ChainEpoch, _ []byte) ([]byte, error) {
return []byte("i_am_random_____i_am_random_____"), nil // 32 bytes.
}
func (r *fixedRand) GetBeaconRandomnessLookingForward(_ context.Context, _ crypto.DomainSeparationTag, _ abi.ChainEpoch, _ []byte) ([]byte, error) {
return []byte("i_am_random_____i_am_random_____"), nil // 32 bytes.
}
func (r *fixedRand) GetBeaconRandomnessLookingBack(_ context.Context, _ crypto.DomainSeparationTag, _ abi.ChainEpoch, _ []byte) ([]byte, error) {
return []byte("i_am_random_____i_am_random_____"), nil // 32 bytes. return []byte("i_am_random_____i_am_random_____"), nil // 32 bytes.
} }

21
conformance/rand_record.go
View File

@ -45,8 +45,17 @@ func (r *RecordingRand) loadHead() {
r.head = head.Key() r.head = head.Key()
} }
func (r *RecordingRand) GetChainRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) { func (r *RecordingRand) GetChainRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return r.getChainRandomness(ctx, pers, round, entropy)
}
func (r *RecordingRand) GetChainRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return r.getChainRandomness(ctx, pers, round, entropy)
}
func (r *RecordingRand) getChainRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
r.once.Do(r.loadHead) r.once.Do(r.loadHead)
// FullNode's ChainGetRandomnessFromTickets handles whether we should be looking forward or back
ret, err := r.api.ChainGetRandomnessFromTickets(ctx, r.head, pers, round, entropy) ret, err := r.api.ChainGetRandomnessFromTickets(ctx, r.head, pers, round, entropy)
if err != nil { if err != nil {
return ret, err return ret, err
@ -70,7 +79,15 @@ func (r *RecordingRand) GetChainRandomness(ctx context.Context, pers crypto.Doma
return ret, err return ret, err
} }
func (r *RecordingRand) GetBeaconRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) { func (r *RecordingRand) GetBeaconRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return r.getBeaconRandomness(ctx, pers, round, entropy)
}
func (r *RecordingRand) GetBeaconRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return r.getBeaconRandomness(ctx, pers, round, entropy)
}
func (r *RecordingRand) getBeaconRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
r.once.Do(r.loadHead) r.once.Do(r.loadHead)
ret, err := r.api.ChainGetRandomnessFromBeacon(ctx, r.head, pers, round, entropy) ret, err := r.api.ChainGetRandomnessFromBeacon(ctx, r.head, pers, round, entropy)
if err != nil { if err != nil {

33
conformance/rand_replay.go
View File

@ -43,7 +43,15 @@ func (r *ReplayingRand) match(requested schema.RandomnessRule) ([]byte, bool) {
return nil, false return nil, false
} }
func (r *ReplayingRand) GetChainRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) { func (r *ReplayingRand) GetChainRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return r.getChainRandomness(ctx, pers, round, entropy, false)
}
func (r *ReplayingRand) GetChainRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return r.getChainRandomness(ctx, pers, round, entropy, true)
}
func (r *ReplayingRand) getChainRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte, lookback bool) ([]byte, error) {
rule := schema.RandomnessRule{ rule := schema.RandomnessRule{
Kind: schema.RandomnessChain, Kind: schema.RandomnessChain,
DomainSeparationTag: int64(pers), DomainSeparationTag: int64(pers),
@ -57,10 +65,23 @@ func (r *ReplayingRand) GetChainRandomness(ctx context.Context, pers crypto.Doma
} }
r.reporter.Logf("returning fallback chain randomness: dst=%d, epoch=%d, entropy=%x", pers, round, entropy) r.reporter.Logf("returning fallback chain randomness: dst=%d, epoch=%d, entropy=%x", pers, round, entropy)
return r.fallback.GetChainRandomness(ctx, pers, round, entropy)
if lookback {
return r.fallback.GetChainRandomnessLookingBack(ctx, pers, round, entropy)
} }
func (r *ReplayingRand) GetBeaconRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) { return r.fallback.GetChainRandomnessLookingForward(ctx, pers, round, entropy)
}
func (r *ReplayingRand) GetBeaconRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return r.getBeaconRandomness(ctx, pers, round, entropy, false)
}
func (r *ReplayingRand) GetBeaconRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) {
return r.getBeaconRandomness(ctx, pers, round, entropy, true)
}
func (r *ReplayingRand) getBeaconRandomness(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte, lookback bool) ([]byte, error) {
rule := schema.RandomnessRule{ rule := schema.RandomnessRule{
Kind: schema.RandomnessBeacon, Kind: schema.RandomnessBeacon,
DomainSeparationTag: int64(pers), DomainSeparationTag: int64(pers),
@ -74,6 +95,10 @@ func (r *ReplayingRand) GetBeaconRandomness(ctx context.Context, pers crypto.Dom
} }
r.reporter.Logf("returning fallback beacon randomness: dst=%d, epoch=%d, entropy=%x", pers, round, entropy) r.reporter.Logf("returning fallback beacon randomness: dst=%d, epoch=%d, entropy=%x", pers, round, entropy)
return r.fallback.GetBeaconRandomness(ctx, pers, round, entropy)
if lookback {
return r.fallback.GetBeaconRandomnessLookingBack(ctx, pers, round, entropy)
}
return r.fallback.GetBeaconRandomnessLookingForward(ctx, pers, round, entropy)
} }

16
node/impl/full/chain.go
View File

@ -10,6 +10,8 @@ import (
"strings" "strings"
"sync" "sync"
"github.com/filecoin-project/lotus/build"
"go.uber.org/fx" "go.uber.org/fx"
"golang.org/x/xerrors" "golang.org/x/xerrors"
@ -95,7 +97,12 @@ func (a *ChainAPI) ChainGetRandomnessFromTickets(ctx context.Context, tsk types.
return nil, xerrors.Errorf("loading tipset key: %w", err) return nil, xerrors.Errorf("loading tipset key: %w", err)
} }
return a.Chain.GetChainRandomness(ctx, pts.Cids(), personalization, randEpoch, entropy) // Doing this here is slightly nicer than doing it in the chainstore directly, but it's still bad for ChainAPI to reason about network upgrades
if randEpoch > build.UpgradeHyperdriveHeight {
return a.Chain.GetChainRandomnessLookingForward(ctx, pts.Cids(), personalization, randEpoch, entropy)
}
return a.Chain.GetChainRandomnessLookingBack(ctx, pts.Cids(), personalization, randEpoch, entropy)
} }
func (a *ChainAPI) ChainGetRandomnessFromBeacon(ctx context.Context, tsk types.TipSetKey, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) (abi.Randomness, error) { func (a *ChainAPI) ChainGetRandomnessFromBeacon(ctx context.Context, tsk types.TipSetKey, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) (abi.Randomness, error) {
@ -104,7 +111,12 @@ func (a *ChainAPI) ChainGetRandomnessFromBeacon(ctx context.Context, tsk types.T
return nil, xerrors.Errorf("loading tipset key: %w", err) return nil, xerrors.Errorf("loading tipset key: %w", err)
} }
return a.Chain.GetBeaconRandomness(ctx, pts.Cids(), personalization, randEpoch, entropy) // Doing this here is slightly nicer than doing it in the chainstore directly, but it's still bad for ChainAPI to reason about network upgrades
if randEpoch > build.UpgradeHyperdriveHeight {
return a.Chain.GetBeaconRandomnessLookingForward(ctx, pts.Cids(), personalization, randEpoch, entropy)
}
return a.Chain.GetBeaconRandomnessLookingBack(ctx, pts.Cids(), personalization, randEpoch, entropy)
} }
func (a *ChainAPI) ChainGetBlock(ctx context.Context, msg cid.Cid) (*types.BlockHeader, error) { func (a *ChainAPI) ChainGetBlock(ctx context.Context, msg cid.Cid) (*types.BlockHeader, error) {