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