lotus/chain/gen/gen.go

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package gen
import (
"bytes"
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"context"
"fmt"
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"io/ioutil"
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"sync/atomic"
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"github.com/filecoin-project/go-address"
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commcid "github.com/filecoin-project/go-fil-commcid"
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"github.com/filecoin-project/specs-actors/actors/abi"
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"github.com/filecoin-project/specs-actors/actors/crypto"
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"github.com/filecoin-project/specs-storage/storage"
block "github.com/ipfs/go-block-format"
"github.com/ipfs/go-blockservice"
"github.com/ipfs/go-car"
"github.com/ipfs/go-cid"
blockstore "github.com/ipfs/go-ipfs-blockstore"
offline "github.com/ipfs/go-ipfs-exchange-offline"
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format "github.com/ipfs/go-ipld-format"
logging "github.com/ipfs/go-log/v2"
"github.com/ipfs/go-merkledag"
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"github.com/minio/blake2b-simd"
"go.opencensus.io/trace"
"golang.org/x/xerrors"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/build"
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genesis2 "github.com/filecoin-project/lotus/chain/gen/genesis"
"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/chain/wallet"
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"github.com/filecoin-project/lotus/cmd/lotus-seed/seed"
"github.com/filecoin-project/lotus/genesis"
"github.com/filecoin-project/lotus/lib/sigs"
"github.com/filecoin-project/lotus/node/repo"
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"github.com/filecoin-project/sector-storage/ffiwrapper"
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)
var log = logging.Logger("gen")
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const msgsPerBlock = 20
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type ChainGen struct {
msgsPerBlock int
bs blockstore.Blockstore
cs *store.ChainStore
sm *stmgr.StateManager
genesis *types.BlockHeader
CurTipset *store.FullTipSet
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Timestamper func(*types.TipSet, abi.ChainEpoch) uint64
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GetMessages func(*ChainGen) ([]*types.SignedMessage, error)
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w *wallet.Wallet
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eppProvs map[address.Address]ElectionPoStProver
Miners []address.Address
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receivers []address.Address
banker address.Address
bankerNonce uint64
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r repo.Repo
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lr repo.LockedRepo
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}
type mybs struct {
blockstore.Blockstore
}
func (m mybs) Get(c cid.Cid) (block.Block, error) {
b, err := m.Blockstore.Get(c)
if err != nil {
return nil, err
}
return b, nil
}
func NewGenerator() (*ChainGen, error) {
mr := repo.NewMemory(nil)
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lr, err := mr.Lock(repo.StorageMiner)
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if err != nil {
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return nil, xerrors.Errorf("taking mem-repo lock failed: %w", err)
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}
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ds, err := lr.Datastore("/metadata")
if err != nil {
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return nil, xerrors.Errorf("failed to get metadata datastore: %w", err)
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}
bds, err := lr.Datastore("/blocks")
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if err != nil {
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return nil, xerrors.Errorf("failed to get blocks datastore: %w", err)
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}
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bs := mybs{blockstore.NewIdStore(blockstore.NewBlockstore(bds))}
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ks, err := lr.KeyStore()
if err != nil {
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return nil, xerrors.Errorf("getting repo keystore failed: %w", err)
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}
w, err := wallet.NewWallet(ks)
if err != nil {
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return nil, xerrors.Errorf("creating memrepo wallet failed: %w", err)
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}
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banker, err := w.GenerateKey(crypto.SigTypeSecp256k1)
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if err != nil {
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return nil, xerrors.Errorf("failed to generate banker key: %w", err)
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}
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receievers := make([]address.Address, msgsPerBlock)
for r := range receievers {
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receievers[r], err = w.GenerateKey(crypto.SigTypeBLS)
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if err != nil {
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return nil, xerrors.Errorf("failed to generate receiver key: %w", err)
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}
}
maddr1 := genesis2.MinerAddress(0)
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m1temp, err := ioutil.TempDir("", "preseal")
if err != nil {
return nil, err
}
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genm1, k1, err := seed.PreSeal(maddr1, abi.RegisteredProof_StackedDRG2KiBPoSt, 0, 1, m1temp, []byte("some randomness"), nil)
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if err != nil {
return nil, err
}
maddr2 := genesis2.MinerAddress(1)
m2temp, err := ioutil.TempDir("", "preseal")
if err != nil {
return nil, err
}
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genm2, k2, err := seed.PreSeal(maddr2, abi.RegisteredProof_StackedDRG2KiBPoSt, 0, 1, m2temp, []byte("some randomness"), nil)
if err != nil {
return nil, err
}
mk1, err := w.Import(k1)
if err != nil {
return nil, err
}
mk2, err := w.Import(k2)
if err != nil {
return nil, err
}
sys := vm.Syscalls(&genFakeVerifier{})
tpl := genesis.Template{
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Accounts: []genesis.Actor{
{
Type: genesis.TAccount,
Balance: types.FromFil(40000),
Meta: (&genesis.AccountMeta{Owner: mk1}).ActorMeta(),
},
{
Type: genesis.TAccount,
Balance: types.FromFil(40000),
Meta: (&genesis.AccountMeta{Owner: mk2}).ActorMeta(),
},
{
Type: genesis.TAccount,
Balance: types.FromFil(50000),
Meta: (&genesis.AccountMeta{Owner: banker}).ActorMeta(),
},
},
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Miners: []genesis.Miner{
*genm1,
*genm2,
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},
NetworkName: "",
Timestamp: 100000,
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}
genb, err := genesis2.MakeGenesisBlock(context.TODO(), bs, sys, tpl)
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if err != nil {
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return nil, xerrors.Errorf("make genesis block failed: %w", err)
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}
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cs := store.NewChainStore(bs, ds, sys)
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genfb := &types.FullBlock{Header: genb.Genesis}
gents := store.NewFullTipSet([]*types.FullBlock{genfb})
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if err := cs.SetGenesis(genb.Genesis); err != nil {
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return nil, xerrors.Errorf("set genesis failed: %w", err)
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}
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mgen := make(map[address.Address]ElectionPoStProver)
for i := range tpl.Miners {
mgen[genesis2.MinerAddress(uint64(i))] = &eppProvider{}
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}
sm := stmgr.NewStateManager(cs)
miners := []address.Address{maddr1, maddr2}
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gen := &ChainGen{
bs: bs,
cs: cs,
sm: sm,
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msgsPerBlock: msgsPerBlock,
genesis: genb.Genesis,
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w: w,
GetMessages: getRandomMessages,
Miners: miners,
eppProvs: mgen,
banker: banker,
receivers: receievers,
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CurTipset: gents,
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r: mr,
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lr: lr,
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}
return gen, nil
}
func (cg *ChainGen) SetStateManager(sm *stmgr.StateManager) {
cg.sm = sm
}
func (cg *ChainGen) ChainStore() *store.ChainStore {
return cg.cs
}
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func (cg *ChainGen) Genesis() *types.BlockHeader {
return cg.genesis
}
func (cg *ChainGen) GenesisCar() ([]byte, error) {
offl := offline.Exchange(cg.bs)
blkserv := blockservice.New(cg.bs, offl)
dserv := merkledag.NewDAGService(blkserv)
out := new(bytes.Buffer)
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if err := car.WriteCarWithWalker(context.TODO(), dserv, []cid.Cid{cg.Genesis().Cid()}, out, CarWalkFunc); err != nil {
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return nil, xerrors.Errorf("genesis car write car failed: %w", err)
}
return out.Bytes(), nil
}
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func CarWalkFunc(nd format.Node) (out []*format.Link, err error) {
for _, link := range nd.Links() {
if link.Cid.Prefix().MhType == uint64(commcid.FC_SEALED_V1) || link.Cid.Prefix().MhType == uint64(commcid.FC_UNSEALED_V1) {
continue
}
out = append(out, link)
}
return out, nil
}
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func (cg *ChainGen) nextBlockProof(ctx context.Context, pts *types.TipSet, m address.Address, round int64) (*types.EPostProof, *types.Ticket, error) {
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mc := &mca{w: cg.w, sm: cg.sm}
buf := new(bytes.Buffer)
if err := m.MarshalCBOR(buf); err != nil {
return nil, nil, xerrors.Errorf("failed to cbor marshal address: %w", err)
}
ticketRand, err := mc.ChainGetRandomness(ctx, pts.Key(), crypto.DomainSeparationTag_TicketProduction, abi.ChainEpoch(round-build.EcRandomnessLookback), buf.Bytes())
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if err != nil {
return nil, nil, err
}
st := pts.ParentState()
worker, err := stmgr.GetMinerWorkerRaw(ctx, cg.sm, st, m)
if err != nil {
return nil, nil, xerrors.Errorf("get miner worker: %w", err)
}
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vrfout, err := ComputeVRF(ctx, cg.w.Sign, worker, ticketRand)
if err != nil {
return nil, nil, xerrors.Errorf("compute VRF: %w", err)
}
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tick := &types.Ticket{
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VRFProof: vrfout,
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}
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eproofin, err := IsRoundWinner(ctx, pts, round, m, cg.eppProvs[m], mc)
if err != nil {
return nil, nil, xerrors.Errorf("checking round winner failed: %w", err)
}
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if eproofin == nil {
return nil, tick, nil
}
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eproof, err := ComputeProof(ctx, cg.eppProvs[m], eproofin)
if err != nil {
return nil, nil, xerrors.Errorf("computing proof: %w", err)
}
return eproof, tick, nil
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}
type MinedTipSet struct {
TipSet *store.FullTipSet
Messages []*types.SignedMessage
}
func (cg *ChainGen) NextTipSet() (*MinedTipSet, error) {
mts, err := cg.NextTipSetFromMiners(cg.CurTipset.TipSet(), cg.Miners)
if err != nil {
return nil, err
}
cg.CurTipset = mts.TipSet
return mts, nil
}
func (cg *ChainGen) NextTipSetFromMiners(base *types.TipSet, miners []address.Address) (*MinedTipSet, error) {
var blks []*types.FullBlock
msgs, err := cg.GetMessages(cg)
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if err != nil {
return nil, xerrors.Errorf("get random messages: %w", err)
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}
for round := int64(base.Height() + 1); len(blks) == 0; round++ {
for _, m := range miners {
proof, t, err := cg.nextBlockProof(context.TODO(), base, m, round)
if err != nil {
return nil, xerrors.Errorf("next block proof: %w", err)
}
if proof != nil {
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fblk, err := cg.makeBlock(base, m, proof, t, abi.ChainEpoch(round), msgs)
if err != nil {
return nil, xerrors.Errorf("making a block for next tipset failed: %w", err)
}
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if err := cg.cs.PersistBlockHeaders(fblk.Header); err != nil {
return nil, xerrors.Errorf("chainstore AddBlock: %w", err)
}
blks = append(blks, fblk)
}
}
}
fts := store.NewFullTipSet(blks)
return &MinedTipSet{
TipSet: fts,
Messages: msgs,
}, nil
}
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func (cg *ChainGen) makeBlock(parents *types.TipSet, m address.Address, eproof *types.EPostProof, ticket *types.Ticket, height abi.ChainEpoch, msgs []*types.SignedMessage) (*types.FullBlock, error) {
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var ts uint64
if cg.Timestamper != nil {
ts = cg.Timestamper(parents, height-parents.Height())
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} else {
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ts = parents.MinTimestamp() + uint64((height-parents.Height())*build.BlockDelay)
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}
fblk, err := MinerCreateBlock(context.TODO(), cg.sm, cg.w, m, parents, ticket, eproof, msgs, height, ts)
if err != nil {
return nil, err
}
return fblk, err
}
// This function is awkward. It's used to deal with messages made when
// simulating forks
func (cg *ChainGen) ResyncBankerNonce(ts *types.TipSet) error {
act, err := cg.sm.GetActor(cg.banker, ts)
if err != nil {
return err
}
cg.bankerNonce = act.Nonce
return nil
}
func (cg *ChainGen) Banker() address.Address {
return cg.banker
}
func (cg *ChainGen) Wallet() *wallet.Wallet {
return cg.w
}
func getRandomMessages(cg *ChainGen) ([]*types.SignedMessage, error) {
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msgs := make([]*types.SignedMessage, cg.msgsPerBlock)
for m := range msgs {
msg := types.Message{
To: cg.receivers[m%len(cg.receivers)],
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From: cg.banker,
Nonce: atomic.AddUint64(&cg.bankerNonce, 1) - 1,
Value: types.NewInt(uint64(m + 1)),
Method: 0,
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GasLimit: 10000,
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GasPrice: types.NewInt(0),
}
sig, err := cg.w.Sign(context.TODO(), cg.banker, msg.Cid().Bytes())
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if err != nil {
return nil, err
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}
msgs[m] = &types.SignedMessage{
Message: msg,
Signature: *sig,
}
}
return msgs, nil
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}
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func (cg *ChainGen) YieldRepo() (repo.Repo, error) {
if err := cg.lr.Close(); err != nil {
return nil, err
}
return cg.r, nil
}
type MiningCheckAPI interface {
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ChainGetRandomness(ctx context.Context, tsk types.TipSetKey, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) (abi.Randomness, error)
MinerGetBaseInfo(context.Context, address.Address, types.TipSetKey) (*api.MiningBaseInfo, error)
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WalletSign(context.Context, address.Address, []byte) (*crypto.Signature, error)
}
type mca struct {
w *wallet.Wallet
sm *stmgr.StateManager
}
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func (mca mca) ChainGetRandomness(ctx context.Context, tsk types.TipSetKey, personalization crypto.DomainSeparationTag, randEpoch abi.ChainEpoch, entropy []byte) (abi.Randomness, error) {
pts, err := mca.sm.ChainStore().LoadTipSet(tsk)
if err != nil {
return nil, xerrors.Errorf("loading tipset key: %w", err)
}
return mca.sm.ChainStore().GetRandomness(ctx, pts.Cids(), personalization, int64(randEpoch), entropy)
}
func (mca mca) MinerGetBaseInfo(ctx context.Context, maddr address.Address, tsk types.TipSetKey) (*api.MiningBaseInfo, error) {
return stmgr.MinerGetBaseInfo(ctx, mca.sm, tsk, maddr)
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}
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func (mca mca) WalletSign(ctx context.Context, a address.Address, v []byte) (*crypto.Signature, error) {
return mca.w.Sign(ctx, a, v)
}
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type ElectionPoStProver interface {
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GenerateCandidates(context.Context, []abi.SectorInfo, abi.PoStRandomness) ([]storage.PoStCandidateWithTicket, error)
ComputeProof(context.Context, []abi.SectorInfo, []byte, []storage.PoStCandidateWithTicket) ([]abi.PoStProof, error)
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}
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type eppProvider struct{}
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func (epp *eppProvider) GenerateCandidates(ctx context.Context, _ []abi.SectorInfo, eprand abi.PoStRandomness) ([]storage.PoStCandidateWithTicket, error) {
return []storage.PoStCandidateWithTicket{
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{
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Candidate: abi.PoStCandidate{
RegisteredProof: abi.RegisteredProof_StackedDRG2KiBPoSt,
SectorID: abi.SectorID{Number: 1},
PartialTicket: abi.PartialTicket{},
PrivateProof: abi.PrivatePoStCandidateProof{},
ChallengeIndex: 1,
},
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},
}, nil
}
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func (epp *eppProvider) ComputeProof(ctx context.Context, _ []abi.SectorInfo, eprand []byte, winners []storage.PoStCandidateWithTicket) ([]abi.PoStProof, error) {
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return []abi.PoStProof{{
ProofBytes: []byte("valid proof"),
}}, nil
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}
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type ProofInput struct {
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sectors []abi.SectorInfo
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hvrf []byte
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winners []storage.PoStCandidateWithTicket
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vrfout []byte
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}
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func IsRoundWinner(ctx context.Context, ts *types.TipSet, round int64, miner address.Address, epp ElectionPoStProver, a MiningCheckAPI) (*ProofInput, error) {
buf := new(bytes.Buffer)
if err := miner.MarshalCBOR(buf); err != nil {
return nil, xerrors.Errorf("failed to cbor marshal address: %w")
}
epostRand, err := a.ChainGetRandomness(ctx, ts.Key(), crypto.DomainSeparationTag_ElectionPoStChallengeSeed, abi.ChainEpoch(round-build.EcRandomnessLookback), buf.Bytes())
if err != nil {
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return nil, xerrors.Errorf("chain get randomness: %w", err)
}
mbi, err := a.MinerGetBaseInfo(ctx, miner, ts.Key())
if err != nil {
return nil, xerrors.Errorf("failed to get mining base info: %w", err)
}
vrfout, err := ComputeVRF(ctx, a.WalletSign, mbi.Worker, epostRand)
if err != nil {
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return nil, xerrors.Errorf("failed to compute VRF: %w", err)
}
if len(mbi.Sectors) == 0 {
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return nil, nil
}
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var sinfos []abi.SectorInfo
for _, s := range mbi.Sectors {
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if s.Info.Info.RegisteredProof == 0 {
return nil, xerrors.Errorf("sector %d in proving set had registered type of zero", s.ID)
}
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sinfos = append(sinfos, abi.SectorInfo{
SectorNumber: s.ID,
SealedCID: s.Info.Info.SealedCID,
RegisteredProof: s.Info.Info.RegisteredProof,
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})
}
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hvrf := blake2b.Sum256(vrfout)
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candidates, err := epp.GenerateCandidates(ctx, sinfos, hvrf[:])
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if err != nil {
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return nil, xerrors.Errorf("failed to generate electionPoSt candidates: %w", err)
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}
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var winners []storage.PoStCandidateWithTicket
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for _, c := range candidates {
if types.IsTicketWinner(c.Candidate.PartialTicket, mbi.SectorSize, uint64(len(sinfos)), mbi.NetworkPower) {
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winners = append(winners, c)
}
}
// no winners, sad
if len(winners) == 0 {
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return nil, nil
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}
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return &ProofInput{
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sectors: sinfos,
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hvrf: hvrf[:],
winners: winners,
vrfout: vrfout,
}, nil
}
func ComputeProof(ctx context.Context, epp ElectionPoStProver, pi *ProofInput) (*types.EPostProof, error) {
proof, err := epp.ComputeProof(ctx, pi.sectors, pi.hvrf, pi.winners)
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if err != nil {
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return nil, xerrors.Errorf("failed to compute snark for election proof: %w", err)
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}
ept := types.EPostProof{
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Proofs: proof,
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PostRand: pi.vrfout,
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}
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for _, win := range pi.winners {
part := make([]byte, 32)
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copy(part, win.Candidate.PartialTicket)
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ept.Candidates = append(ept.Candidates, types.EPostTicket{
Partial: part,
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SectorID: win.Candidate.SectorID.Number,
ChallengeIndex: uint64(win.Candidate.ChallengeIndex),
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})
}
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return &ept, nil
}
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type SignFunc func(context.Context, address.Address, []byte) (*crypto.Signature, error)
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func VerifyVRF(ctx context.Context, worker address.Address, vrfBase, vrfproof []byte) error {
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_, span := trace.StartSpan(ctx, "VerifyVRF")
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defer span.End()
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sig := &crypto.Signature{
Type: crypto.SigTypeBLS,
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Data: vrfproof,
}
if err := sigs.Verify(sig, worker, vrfBase); err != nil {
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return xerrors.Errorf("vrf was invalid: %w", err)
}
return nil
}
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func ComputeVRF(ctx context.Context, sign SignFunc, worker address.Address, sigInput []byte) ([]byte, error) {
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sig, err := sign(ctx, worker, sigInput)
if err != nil {
return nil, err
}
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if sig.Type != crypto.SigTypeBLS {
return nil, fmt.Errorf("miner worker address was not a BLS key")
}
return sig.Data, nil
}
type genFakeVerifier struct{}
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var _ ffiwrapper.Verifier = (*genFakeVerifier)(nil)
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func (m genFakeVerifier) VerifyElectionPost(ctx context.Context, pvi abi.PoStVerifyInfo) (bool, error) {
panic("nyi")
}
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func (m genFakeVerifier) VerifySeal(svi abi.SealVerifyInfo) (bool, error) {
return true, nil
}
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func (m genFakeVerifier) VerifyFallbackPost(ctx context.Context, pvi abi.PoStVerifyInfo) (bool, error) {
panic("nyi")
}