216 lines
4.8 KiB
Go
216 lines
4.8 KiB
Go
package state
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import (
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"context"
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"fmt"
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"github.com/filecoin-project/specs-actors/actors/util/adt"
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"github.com/ipfs/go-cid"
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hamt "github.com/ipfs/go-hamt-ipld"
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cbor "github.com/ipfs/go-ipld-cbor"
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logging "github.com/ipfs/go-log/v2"
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"go.opencensus.io/trace"
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"golang.org/x/xerrors"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/lotus/chain/actors"
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"github.com/filecoin-project/lotus/chain/types"
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)
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var log = logging.Logger("statetree")
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type StateTree struct {
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root *hamt.Node
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Store cbor.IpldStore
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actorcache map[address.Address]*types.Actor
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snapshot cid.Cid
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}
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func NewStateTree(cst cbor.IpldStore) (*StateTree, error) {
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return &StateTree{
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root: hamt.NewNode(cst, hamt.UseTreeBitWidth(5)),
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Store: cst,
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actorcache: make(map[address.Address]*types.Actor),
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}, nil
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}
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func LoadStateTree(cst cbor.IpldStore, c cid.Cid) (*StateTree, error) {
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nd, err := hamt.LoadNode(context.Background(), cst, c, hamt.UseTreeBitWidth(5))
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if err != nil {
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log.Errorf("loading hamt node %s failed: %s", c, err)
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return nil, err
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}
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return &StateTree{
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root: nd,
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Store: cst,
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actorcache: make(map[address.Address]*types.Actor),
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}, nil
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}
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func (st *StateTree) SetActor(addr address.Address, act *types.Actor) error {
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iaddr, err := st.LookupID(addr)
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if err != nil {
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return xerrors.Errorf("ID lookup failed: %w", err)
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}
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addr = iaddr
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cact, ok := st.actorcache[addr]
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if ok {
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if act == cact {
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return nil
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}
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}
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st.actorcache[addr] = act
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return st.root.Set(context.TODO(), string(addr.Bytes()), act)
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}
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func (st *StateTree) LookupID(addr address.Address) (address.Address, error) {
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if addr.Protocol() == address.ID {
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return addr, nil
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}
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act, err := st.GetActor(actors.InitAddress)
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if err != nil {
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return address.Undef, xerrors.Errorf("getting init actor: %w", err)
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}
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var ias actors.InitActorState
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if err := st.Store.Get(context.TODO(), act.Head, &ias); err != nil {
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return address.Undef, xerrors.Errorf("loading init actor state: %w", err)
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}
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return ias.ResolveAddress(&adtStore{st.Store}, addr)
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}
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func (st *StateTree) GetActor(addr address.Address) (*types.Actor, error) {
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if addr == address.Undef {
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return nil, fmt.Errorf("GetActor called on undefined address")
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}
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iaddr, err := st.LookupID(addr)
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if err != nil {
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if xerrors.Is(err, hamt.ErrNotFound) {
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return nil, xerrors.Errorf("resolution lookup failed (%s): %w", addr, types.ErrActorNotFound)
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}
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return nil, xerrors.Errorf("address resolution: %w", err)
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}
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addr = iaddr
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cact, ok := st.actorcache[addr]
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if ok {
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return cact, nil
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}
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var act types.Actor
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err = st.root.Find(context.TODO(), string(addr.Bytes()), &act)
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if err != nil {
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if err == hamt.ErrNotFound {
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return nil, types.ErrActorNotFound
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}
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return nil, xerrors.Errorf("hamt find failed: %w", err)
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}
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st.actorcache[addr] = &act
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return &act, nil
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}
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func (st *StateTree) Flush(ctx context.Context) (cid.Cid, error) {
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ctx, span := trace.StartSpan(ctx, "stateTree.Flush")
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defer span.End()
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for addr, act := range st.actorcache {
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if err := st.root.Set(ctx, string(addr.Bytes()), act); err != nil {
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return cid.Undef, err
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}
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}
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st.actorcache = make(map[address.Address]*types.Actor)
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if err := st.root.Flush(ctx); err != nil {
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return cid.Undef, err
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}
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return st.Store.Put(ctx, st.root)
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}
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func (st *StateTree) Snapshot(ctx context.Context) error {
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ctx, span := trace.StartSpan(ctx, "stateTree.SnapShot")
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defer span.End()
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ss, err := st.Flush(ctx)
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if err != nil {
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return err
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}
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st.snapshot = ss
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return nil
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}
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func (st *StateTree) RegisterNewAddress(addr address.Address, act *types.Actor) (address.Address, error) {
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var out address.Address
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err := st.MutateActor(actors.InitAddress, func(initact *types.Actor) error {
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var ias actors.InitActorState
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if err := st.Store.Get(context.TODO(), initact.Head, &ias); err != nil {
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return err
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}
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oaddr, err := ias.MapAddressToNewID(&adtStore{st.Store}, addr)
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if err != nil {
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return err
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}
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out = oaddr
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ncid, err := st.Store.Put(context.TODO(), &ias)
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if err != nil {
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return err
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}
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initact.Head = ncid
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return nil
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})
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if err != nil {
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return address.Undef, err
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}
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if err := st.SetActor(out, act); err != nil {
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return address.Undef, err
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}
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return out, nil
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}
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type adtStore struct{ cbor.IpldStore }
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func (a *adtStore) Context() context.Context {
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return context.TODO()
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}
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var _ adt.Store = (*adtStore)(nil)
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func (st *StateTree) Revert() error {
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nd, err := hamt.LoadNode(context.Background(), st.Store, st.snapshot, hamt.UseTreeBitWidth(5))
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if err != nil {
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return err
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}
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st.root = nd
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return nil
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}
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func (st *StateTree) MutateActor(addr address.Address, f func(*types.Actor) error) error {
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act, err := st.GetActor(addr)
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if err != nil {
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return err
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}
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if err := f(act); err != nil {
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return err
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}
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return st.SetActor(addr, act)
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}
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