459 lines
11 KiB
Go
459 lines
11 KiB
Go
package stmgr
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import (
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"context"
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"fmt"
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"sync"
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amt "github.com/filecoin-project/go-amt-ipld"
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"github.com/filecoin-project/go-lotus/chain/actors"
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"github.com/filecoin-project/go-lotus/chain/address"
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"github.com/filecoin-project/go-lotus/chain/state"
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"github.com/filecoin-project/go-lotus/chain/store"
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"github.com/filecoin-project/go-lotus/chain/types"
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"github.com/filecoin-project/go-lotus/chain/vm"
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cbg "github.com/whyrusleeping/cbor-gen"
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"golang.org/x/xerrors"
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bls "github.com/filecoin-project/go-bls-sigs"
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"github.com/ipfs/go-cid"
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hamt "github.com/ipfs/go-hamt-ipld"
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logging "github.com/ipfs/go-log"
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"go.opencensus.io/trace"
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)
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var log = logging.Logger("statemgr")
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type StateManager struct {
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cs *store.ChainStore
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stCache map[string][]cid.Cid
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stlk sync.Mutex
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}
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func NewStateManager(cs *store.ChainStore) *StateManager {
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return &StateManager{
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cs: cs,
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stCache: make(map[string][]cid.Cid),
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}
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}
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func cidsToKey(cids []cid.Cid) string {
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var out string
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for _, c := range cids {
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out += c.KeyString()
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}
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return out
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}
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func (sm *StateManager) TipSetState(ctx context.Context, ts *types.TipSet) (cid.Cid, cid.Cid, error) {
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ck := cidsToKey(ts.Cids())
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sm.stlk.Lock()
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cached, ok := sm.stCache[ck]
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sm.stlk.Unlock()
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if ok {
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return cached[0], cached[1], nil
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}
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if ts.Height() == 0 {
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// NB: This is here because the process that executes blocks requires that the
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// block miner reference a valid miner in the state tree. Unless we create some
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// magical genesis miner, this won't work properly, so we short circuit here
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// This avoids the question of 'who gets paid the genesis block reward'
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return ts.Blocks()[0].ParentStateRoot, ts.Blocks()[0].ParentMessageReceipts, nil
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}
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st, rec, err := sm.computeTipSetState(ctx, ts.Blocks(), nil)
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if err != nil {
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return cid.Undef, cid.Undef, err
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}
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sm.stlk.Lock()
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sm.stCache[ck] = []cid.Cid{st, rec}
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sm.stlk.Unlock()
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return st, rec, nil
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}
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func (sm *StateManager) computeTipSetState(ctx context.Context, blks []*types.BlockHeader, cb func(cid.Cid, *types.Message, *vm.ApplyRet) error) (cid.Cid, cid.Cid, error) {
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ctx, span := trace.StartSpan(ctx, "computeTipSetState")
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defer span.End()
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pstate := blks[0].ParentStateRoot
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cids := make([]cid.Cid, len(blks))
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for i, v := range blks {
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cids[i] = v.Cid()
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}
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r := vm.NewChainRand(sm.cs, cids, blks[0].Height, nil)
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vmi, err := vm.NewVM(pstate, blks[0].Height, r, address.Undef, sm.cs)
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if err != nil {
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return cid.Undef, cid.Undef, xerrors.Errorf("instantiating VM failed: %w", err)
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}
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netact, err := vmi.StateTree().GetActor(actors.NetworkAddress)
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if err != nil {
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return cid.Undef, cid.Undef, xerrors.Errorf("failed to get network actor: %w", err)
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}
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reward := vm.MiningReward(netact.Balance)
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for _, b := range blks {
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owner, err := GetMinerOwner(ctx, sm, pstate, b.Miner)
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if err != nil {
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return cid.Undef, cid.Undef, xerrors.Errorf("failed to get owner for miner %s: %w", b.Miner, err)
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}
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act, err := vmi.StateTree().GetActor(owner)
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if err != nil {
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return cid.Undef, cid.Undef, xerrors.Errorf("failed to get miner owner actor")
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}
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if err := vm.Transfer(netact, act, reward); err != nil {
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return cid.Undef, cid.Undef, xerrors.Errorf("failed to deduct funds from network actor: %w", err)
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}
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}
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// TODO: can't use method from chainstore because it doesnt let us know who the block miners were
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applied := make(map[address.Address]uint64)
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balances := make(map[address.Address]types.BigInt)
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preloadAddr := func(a address.Address) error {
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if _, ok := applied[a]; !ok {
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act, err := vmi.StateTree().GetActor(a)
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if err != nil {
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return err
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}
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applied[a] = act.Nonce
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balances[a] = act.Balance
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}
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return nil
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}
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var receipts []cbg.CBORMarshaler
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for _, b := range blks {
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vmi.SetBlockMiner(b.Miner)
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bms, sms, err := sm.cs.MessagesForBlock(b)
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if err != nil {
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return cid.Undef, cid.Undef, xerrors.Errorf("failed to get messages for block: %w", err)
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}
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cmsgs := make([]store.ChainMsg, 0, len(bms)+len(sms))
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for _, m := range bms {
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cmsgs = append(cmsgs, m)
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}
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for _, sm := range sms {
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cmsgs = append(cmsgs, sm)
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}
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for _, cm := range cmsgs {
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m := cm.VMMessage()
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if err := preloadAddr(m.From); err != nil {
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return cid.Undef, cid.Undef, err
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}
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if applied[m.From] != m.Nonce {
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continue
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}
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applied[m.From]++
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if balances[m.From].LessThan(m.RequiredFunds()) {
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continue
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}
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balances[m.From] = types.BigSub(balances[m.From], m.RequiredFunds())
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r, err := vmi.ApplyMessage(ctx, m)
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if err != nil {
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return cid.Undef, cid.Undef, err
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}
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receipts = append(receipts, &r.MessageReceipt)
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if cb != nil {
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if err := cb(cm.Cid(), m, r); err != nil {
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return cid.Undef, cid.Undef, err
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}
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}
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}
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}
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bs := amt.WrapBlockstore(sm.cs.Blockstore())
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rectroot, err := amt.FromArray(bs, receipts)
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if err != nil {
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return cid.Undef, cid.Undef, xerrors.Errorf("failed to build receipts amt: %w", err)
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}
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st, err := vmi.Flush(ctx)
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if err != nil {
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return cid.Undef, cid.Undef, xerrors.Errorf("vm flush failed: %w", err)
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}
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return st, rectroot, nil
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}
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func (sm *StateManager) GetActor(addr address.Address, ts *types.TipSet) (*types.Actor, error) {
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if ts == nil {
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ts = sm.cs.GetHeaviestTipSet()
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}
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stcid := ts.ParentState()
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cst := hamt.CSTFromBstore(sm.cs.Blockstore())
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state, err := state.LoadStateTree(cst, stcid)
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if err != nil {
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return nil, xerrors.Errorf("load state tree: %w", err)
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}
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return state.GetActor(addr)
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}
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func (sm *StateManager) GetBalance(addr address.Address, ts *types.TipSet) (types.BigInt, error) {
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act, err := sm.GetActor(addr, ts)
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if err != nil {
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return types.BigInt{}, xerrors.Errorf("get actor: %w", err)
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}
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return act.Balance, nil
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}
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func (sm *StateManager) ChainStore() *store.ChainStore {
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return sm.cs
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}
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func (sm *StateManager) LoadActorState(ctx context.Context, a address.Address, out interface{}, ts *types.TipSet) (*types.Actor, error) {
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act, err := sm.GetActor(a, ts)
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if err != nil {
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return nil, err
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}
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cst := hamt.CSTFromBstore(sm.cs.Blockstore())
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if err := cst.Get(ctx, act.Head, out); err != nil {
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return nil, err
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}
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return act, nil
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}
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func (sm *StateManager) ResolveToKeyAddress(ctx context.Context, addr address.Address, ts *types.TipSet) (address.Address, error) {
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switch addr.Protocol() {
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case address.BLS, address.SECP256K1:
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return addr, nil
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case address.Actor:
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return address.Undef, xerrors.New("cannot resolve actor address to key address")
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default:
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}
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if ts == nil {
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ts = sm.cs.GetHeaviestTipSet()
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}
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st, _, err := sm.TipSetState(ctx, ts)
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if err != nil {
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return address.Undef, xerrors.Errorf("resolve address failed to get tipset state: %w", err)
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}
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cst := hamt.CSTFromBstore(sm.cs.Blockstore())
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tree, err := state.LoadStateTree(cst, st)
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if err != nil {
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return address.Undef, xerrors.Errorf("failed to load state tree")
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}
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return vm.ResolveToKeyAddr(tree, cst, addr)
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}
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func (sm *StateManager) GetBlsPublicKey(ctx context.Context, addr address.Address, ts *types.TipSet) (pubk bls.PublicKey, err error) {
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kaddr, err := sm.ResolveToKeyAddress(ctx, addr, ts)
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if err != nil {
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return pubk, xerrors.Errorf("failed to resolve address to key address: %w", err)
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}
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if kaddr.Protocol() != address.BLS {
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return pubk, xerrors.Errorf("address must be BLS address to load bls public key")
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}
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copy(pubk[:], kaddr.Payload())
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return pubk, nil
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}
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func (sm *StateManager) WaitForMessage(ctx context.Context, mcid cid.Cid) (*types.TipSet, *types.MessageReceipt, error) {
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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msg, err := sm.cs.GetCMessage(mcid)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to load message: %w", err)
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}
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tsub := sm.cs.SubHeadChanges(ctx)
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head, ok := <-tsub
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if !ok {
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return nil, nil, fmt.Errorf("SubHeadChanges stream was invalid")
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}
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if len(head) != 1 {
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return nil, nil, fmt.Errorf("SubHeadChanges first entry should have been one item")
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}
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if head[0].Type != store.HCCurrent {
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return nil, nil, fmt.Errorf("expected current head on SHC stream (got %s)", head[0].Type)
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}
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r, err := sm.tipsetExecutedMessage(head[0].Val, mcid)
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if err != nil {
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return nil, nil, err
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}
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if r != nil {
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return head[0].Val, r, nil
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}
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var backTs *types.TipSet
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var backRcp *types.MessageReceipt
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backSearchWait := make(chan struct{})
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go func() {
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fts, r, err := sm.searchBackForMsg(ctx, head[0].Val, msg)
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if err != nil {
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log.Warnf("failed to look back through chain for message: %w", err)
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return
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}
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backTs = fts
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backRcp = r
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close(backSearchWait)
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}()
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for {
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select {
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case notif, ok := <-tsub:
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if !ok {
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return nil, nil, ctx.Err()
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}
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for _, val := range notif {
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switch val.Type {
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case store.HCRevert:
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continue
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case store.HCApply:
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r, err := sm.tipsetExecutedMessage(val.Val, mcid)
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if err != nil {
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return nil, nil, err
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}
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if r != nil {
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return val.Val, r, nil
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}
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}
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}
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case <-backSearchWait:
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if backTs != nil {
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return backTs, backRcp, nil
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}
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backSearchWait = nil
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case <-ctx.Done():
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return nil, nil, ctx.Err()
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}
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}
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}
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func (sm *StateManager) searchBackForMsg(ctx context.Context, from *types.TipSet, m store.ChainMsg) (*types.TipSet, *types.MessageReceipt, error) {
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cur := from
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for {
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if cur.Height() == 0 {
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// it ain't here!
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return nil, nil, nil
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}
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select {
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case <-ctx.Done():
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return nil, nil, nil
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default:
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}
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act, err := sm.GetActor(m.VMMessage().From, cur)
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if err != nil {
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return nil, nil, err
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}
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if act.Nonce < m.VMMessage().Nonce {
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// nonce on chain is before message nonce we're looking for, its
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// not going to be here
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return nil, nil, nil
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}
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ts, err := sm.cs.LoadTipSet(cur.Parents())
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if err != nil {
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return nil, nil, fmt.Errorf("failed to load tipset during msg wait searchback: %w", err)
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}
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r, err := sm.tipsetExecutedMessage(ts, m.Cid())
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if err != nil {
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return nil, nil, fmt.Errorf("checking for message execution during lookback: %w", err)
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}
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if r != nil {
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return ts, r, nil
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}
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cur = ts
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}
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}
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func (sm *StateManager) tipsetExecutedMessage(ts *types.TipSet, msg cid.Cid) (*types.MessageReceipt, error) {
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// The genesis block did not execute any messages
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if ts.Height() == 0 {
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return nil, nil
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}
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pts, err := sm.cs.LoadTipSet(ts.Parents())
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if err != nil {
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return nil, err
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}
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cm, err := sm.cs.MessagesForTipset(pts)
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if err != nil {
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return nil, err
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}
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for i, m := range cm {
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if m.Cid() == msg {
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return sm.cs.GetParentReceipt(ts.Blocks()[0], i)
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}
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}
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return nil, nil
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}
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func (sm *StateManager) ListAllActors(ctx context.Context, ts *types.TipSet) ([]address.Address, error) {
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if ts == nil {
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ts = sm.ChainStore().GetHeaviestTipSet()
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}
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st, _, err := sm.TipSetState(ctx, ts)
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if err != nil {
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return nil, err
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}
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cst := hamt.CSTFromBstore(sm.ChainStore().Blockstore())
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r, err := hamt.LoadNode(ctx, cst, st)
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if err != nil {
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return nil, err
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}
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var out []address.Address
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err = r.ForEach(ctx, func(k string, val interface{}) error {
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addr, err := address.NewFromBytes([]byte(k))
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if err != nil {
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return xerrors.Errorf("address in state tree was not valid: %w", err)
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}
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out = append(out, addr)
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return nil
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})
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if err != nil {
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return nil, err
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}
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return out, nil
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}
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