package stmgr import ( "context" "errors" "fmt" "github.com/ipfs/go-cid" cbor "github.com/ipfs/go-ipld-cbor" "go.opencensus.io/trace" "golang.org/x/xerrors" "github.com/filecoin-project/go-address" "github.com/filecoin-project/go-state-types/abi" "github.com/filecoin-project/go-state-types/big" "github.com/filecoin-project/go-state-types/crypto" "github.com/filecoin-project/go-state-types/network" "github.com/filecoin-project/lotus/api" "github.com/filecoin-project/lotus/blockstore" "github.com/filecoin-project/lotus/build" "github.com/filecoin-project/lotus/chain/rand" "github.com/filecoin-project/lotus/chain/state" "github.com/filecoin-project/lotus/chain/types" "github.com/filecoin-project/lotus/chain/vm" ) var ErrExpensiveFork = errors.New("refusing explicit call due to state fork at epoch") // Call applies the given message to the given tipset's parent state, at the epoch following the // tipset's parent. In the presence of null blocks, the height at which the message is invoked may // be less than the specified tipset. func (sm *StateManager) Call(ctx context.Context, msg *types.Message, ts *types.TipSet) (*api.InvocResult, error) { // Copy the message as we modify it below. msgCopy := *msg msg = &msgCopy if msg.GasLimit == 0 { msg.GasLimit = build.BlockGasLimit } if msg.GasFeeCap == types.EmptyInt { msg.GasFeeCap = types.NewInt(0) } if msg.GasPremium == types.EmptyInt { msg.GasPremium = types.NewInt(0) } if msg.Value == types.EmptyInt { msg.Value = types.NewInt(0) } return sm.callInternal(ctx, msg, nil, ts, cid.Undef, sm.GetNetworkVersion, false, false) } // CallWithGas calculates the state for a given tipset, and then applies the given message on top of that state. func (sm *StateManager) CallWithGas(ctx context.Context, msg *types.Message, priorMsgs []types.ChainMsg, ts *types.TipSet) (*api.InvocResult, error) { return sm.callInternal(ctx, msg, priorMsgs, ts, cid.Undef, sm.GetNetworkVersion, true, true) } // CallAtStateAndVersion allows you to specify a message to execute on the given stateCid and network version. // This should mostly be used for gas modelling on a migrated state. // Tipset here is not needed because stateCid and network version fully describe execution we want. The internal function // will get the heaviest tipset for use for things like basefee, which we don't really care about here. func (sm *StateManager) CallAtStateAndVersion(ctx context.Context, msg *types.Message, stateCid cid.Cid, v network.Version) (*api.InvocResult, error) { nvGetter := func(context.Context, abi.ChainEpoch) network.Version { return v } return sm.callInternal(ctx, msg, nil, nil, stateCid, nvGetter, true, false) } // - If no tipset is specified, the first tipset without an expensive migration or one in its parent is used. // - If executing a message at a given tipset or its parent would trigger an expensive migration, the call will // fail with ErrExpensiveFork. func (sm *StateManager) callInternal(ctx context.Context, msg *types.Message, priorMsgs []types.ChainMsg, ts *types.TipSet, stateCid cid.Cid, nvGetter rand.NetworkVersionGetter, checkGas, applyTsMessages bool) (*api.InvocResult, error) { ctx, span := trace.StartSpan(ctx, "statemanager.callInternal") defer span.End() // Copy the message as we'll be modifying the nonce. msgCopy := *msg msg = &msgCopy var err error var pts *types.TipSet if ts == nil { ts = sm.cs.GetHeaviestTipSet() // Search back till we find a height with no fork, or we reach the beginning. // We need the _previous_ height to have no fork, because we'll // run the fork logic in `sm.TipSetState`. We need the _current_ // height to have no fork, because we'll run it inside this // function before executing the given message. for ts.Height() > 0 { pts, err = sm.cs.GetTipSetFromKey(ctx, ts.Parents()) if err != nil { return nil, xerrors.Errorf("failed to find a non-forking epoch: %w", err) } // Checks for expensive forks from the parents to the tipset, including nil tipsets if !sm.hasExpensiveForkBetween(pts.Height(), ts.Height()+1) { break } ts = pts } } else if ts.Height() > 0 { pts, err = sm.cs.GetTipSetFromKey(ctx, ts.Parents()) if err != nil { return nil, xerrors.Errorf("failed to find a non-forking epoch: %w", err) } if sm.hasExpensiveForkBetween(pts.Height(), ts.Height()+1) { return nil, ErrExpensiveFork } } // Unless executing on a specific state cid, apply all the messages from the current tipset // first. Unfortunately, we can't just execute the tipset, because that will run cron. We // don't want to apply miner messages after cron runs in a given epoch. if stateCid == cid.Undef { stateCid = ts.ParentState() } if applyTsMessages { tsMsgs, err := sm.cs.MessagesForTipset(ctx, ts) if err != nil { return nil, xerrors.Errorf("failed to lookup messages for parent tipset: %w", err) } priorMsgs = append(tsMsgs, priorMsgs...) } // Technically, the tipset we're passing in here should be ts+1, but that may not exist. stateCid, err = sm.HandleStateForks(ctx, stateCid, ts.Height(), nil, ts) if err != nil { return nil, fmt.Errorf("failed to handle fork: %w", err) } if span.IsRecordingEvents() { span.AddAttributes( trace.Int64Attribute("gas_limit", msg.GasLimit), trace.StringAttribute("gas_feecap", msg.GasFeeCap.String()), trace.StringAttribute("value", msg.Value.String()), ) } buffStore := blockstore.NewTieredBstore(sm.cs.StateBlockstore(), blockstore.NewMemorySync()) vmopt := &vm.VMOpts{ StateBase: stateCid, Epoch: ts.Height(), Timestamp: ts.MinTimestamp(), Rand: rand.NewStateRand(sm.cs, ts.Cids(), sm.beacon, nvGetter), Bstore: buffStore, Actors: sm.tsExec.NewActorRegistry(), Syscalls: sm.Syscalls, CircSupplyCalc: sm.GetVMCirculatingSupply, NetworkVersion: nvGetter(ctx, ts.Height()), BaseFee: ts.Blocks()[0].ParentBaseFee, LookbackState: LookbackStateGetterForTipset(sm, ts), TipSetGetter: TipSetGetterForTipset(sm.cs, ts), Tracing: true, } vmi, err := sm.newVM(ctx, vmopt) if err != nil { return nil, xerrors.Errorf("failed to set up vm: %w", err) } for i, m := range priorMsgs { _, err = vmi.ApplyMessage(ctx, m) if err != nil { return nil, xerrors.Errorf("applying prior message (%d, %s): %w", i, m.Cid(), err) } } // We flush to get the VM's view of the state tree after applying the above messages // This is needed to get the correct nonce from the actor state to match the VM stateCid, err = vmi.Flush(ctx) if err != nil { return nil, xerrors.Errorf("flushing vm: %w", err) } stTree, err := state.LoadStateTree(cbor.NewCborStore(buffStore), stateCid) if err != nil { return nil, xerrors.Errorf("loading state tree: %w", err) } fromActor, err := stTree.GetActor(msg.From) if err != nil { return nil, xerrors.Errorf("call raw get actor: %s", err) } msg.Nonce = fromActor.Nonce // If the fee cap is set to zero, make gas free. if msg.GasFeeCap.NilOrZero() { // Now estimate with a new VM with no base fee. vmopt.BaseFee = big.Zero() vmopt.StateBase = stateCid vmi, err = sm.newVM(ctx, vmopt) if err != nil { return nil, xerrors.Errorf("failed to set up estimation vm: %w", err) } } var ret *vm.ApplyRet var gasInfo api.MsgGasCost if checkGas { fromKey, err := sm.ResolveToDeterministicAddress(ctx, msg.From, ts) if err != nil { return nil, xerrors.Errorf("could not resolve key: %w", err) } var msgApply types.ChainMsg switch fromKey.Protocol() { case address.BLS: msgApply = msg case address.SECP256K1: msgApply = &types.SignedMessage{ Message: *msg, Signature: crypto.Signature{ Type: crypto.SigTypeSecp256k1, Data: make([]byte, 65), }, } case address.Delegated: msgApply = &types.SignedMessage{ Message: *msg, Signature: crypto.Signature{ Type: crypto.SigTypeDelegated, Data: make([]byte, 65), }, } } ret, err = vmi.ApplyMessage(ctx, msgApply) if err != nil { return nil, xerrors.Errorf("gas estimation failed: %w", err) } gasInfo = MakeMsgGasCost(msg, ret) } else { ret, err = vmi.ApplyImplicitMessage(ctx, msg) if err != nil && ret == nil { return nil, xerrors.Errorf("apply message failed: %w", err) } } var errs string if ret.ActorErr != nil { errs = ret.ActorErr.Error() } return &api.InvocResult{ MsgCid: msg.Cid(), Msg: msg, MsgRct: &ret.MessageReceipt, GasCost: gasInfo, ExecutionTrace: ret.ExecutionTrace, Error: errs, Duration: ret.Duration, }, err } var errHaltExecution = fmt.Errorf("halt") func (sm *StateManager) Replay(ctx context.Context, ts *types.TipSet, mcid cid.Cid) (*types.Message, *vm.ApplyRet, error) { var finder messageFinder // message to find finder.mcid = mcid _, _, err := sm.tsExec.ExecuteTipSet(ctx, sm, ts, &finder, true) if err != nil && !xerrors.Is(err, errHaltExecution) { return nil, nil, xerrors.Errorf("unexpected error during execution: %w", err) } if finder.outr == nil { return nil, nil, xerrors.Errorf("given message not found in tipset") } return finder.outm, finder.outr, nil }