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call.go
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call.go
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package stmgr
import (
"context"
"errors"
"fmt"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-state-types/crypto"
"github.com/ipfs/go-cid"
"go.opencensus.io/trace"
"golang.org/x/xerrors"
"github.com/filecoin-project/lotus/api"
"github.com/filecoin-project/lotus/build"
"github.com/filecoin-project/lotus/chain/store"
"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")
func (sm *StateManager) Call(ctx context.Context, msg *types.Message, ts *types.TipSet) (*api.InvocResult, error) {
ctx, span := trace.StartSpan(ctx, "statemanager.Call")
defer span.End()
// If no tipset is provided, try to find one without a fork.
if ts == nil {
ts = sm.cs.GetHeaviestTipSet()
// Search back till we find a height with no fork, or we reach the beginning.
for ts.Height() > 0 && sm.hasExpensiveFork(ctx, ts.Height()-1) {
var err error
ts, err = sm.cs.GetTipSetFromKey(ts.Parents())
if err != nil {
return nil, xerrors.Errorf("failed to find a non-forking epoch: %w", err)
}
}
}
bstate := ts.ParentState()
bheight := ts.Height()
// If we have to run an expensive migration, and we're not at genesis,
// return an error because the migration will take too long.
//
// We allow this at height 0 for at-genesis migrations (for testing).
if bheight-1 > 0 && sm.hasExpensiveFork(ctx, bheight-1) {
return nil, ErrExpensiveFork
}
// Run the (not expensive) migration.
bstate, err := sm.handleStateForks(ctx, bstate, bheight-1, nil, ts)
if err != nil {
return nil, fmt.Errorf("failed to handle fork: %w", err)
}
vmopt := &vm.VMOpts{
StateBase: bstate,
Epoch: bheight,
Rand: store.NewChainRand(sm.cs, ts.Cids()),
Bstore: sm.cs.Blockstore(),
Syscalls: sm.cs.VMSys(),
CircSupplyCalc: sm.GetVMCirculatingSupply,
NtwkVersion: sm.GetNtwkVersion,
BaseFee: types.NewInt(0),
LookbackState: LookbackStateGetterForTipset(sm, ts),
}
vmi, err := sm.newVM(ctx, vmopt)
if err != nil {
return nil, xerrors.Errorf("failed to set up vm: %w", err)
}
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)
}
if span.IsRecordingEvents() {
span.AddAttributes(
trace.Int64Attribute("gas_limit", msg.GasLimit),
trace.StringAttribute("gas_feecap", msg.GasFeeCap.String()),
trace.StringAttribute("value", msg.Value.String()),
)
}
fromActor, err := vmi.StateTree().GetActor(msg.From)
if err != nil {
return nil, xerrors.Errorf("call raw get actor: %s", err)
}
msg.Nonce = fromActor.Nonce
// TODO: maybe just use the invoker directly?
ret, err := vmi.ApplyImplicitMessage(ctx, msg)
if err != nil {
return nil, xerrors.Errorf("apply message failed: %w", err)
}
var errs string
if ret.ActorErr != nil {
errs = ret.ActorErr.Error()
log.Warnf("chain call failed: %s", ret.ActorErr)
}
return &api.InvocResult{
MsgCid: msg.Cid(),
Msg: msg,
MsgRct: &ret.MessageReceipt,
ExecutionTrace: ret.ExecutionTrace,
Error: errs,
Duration: ret.Duration,
}, nil
}
func (sm *StateManager) CallWithGas(ctx context.Context, msg *types.Message, priorMsgs []types.ChainMsg, ts *types.TipSet) (*api.InvocResult, error) {
ctx, span := trace.StartSpan(ctx, "statemanager.CallWithGas")
defer span.End()
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 && (sm.hasExpensiveFork(ctx, ts.Height()) || sm.hasExpensiveFork(ctx, ts.Height()-1)) {
var err error
ts, err = sm.cs.GetTipSetFromKey(ts.Parents())
if err != nil {
return nil, xerrors.Errorf("failed to find a non-forking epoch: %w", err)
}
}
}
// When we're not at the genesis block, make sure we don't have an expensive migration.
if ts.Height() > 0 && (sm.hasExpensiveFork(ctx, ts.Height()) || sm.hasExpensiveFork(ctx, ts.Height()-1)) {
return nil, ErrExpensiveFork
}
state, _, err := sm.TipSetState(ctx, ts)
if err != nil {
return nil, xerrors.Errorf("computing tipset state: %w", err)
}
state, err = sm.handleStateForks(ctx, state, ts.Height(), nil, ts)
if err != nil {
return nil, fmt.Errorf("failed to handle fork: %w", err)
}
r := store.NewChainRand(sm.cs, ts.Cids())
if span.IsRecordingEvents() {
span.AddAttributes(
trace.Int64Attribute("gas_limit", msg.GasLimit),
trace.StringAttribute("gas_feecap", msg.GasFeeCap.String()),
trace.StringAttribute("value", msg.Value.String()),
)
}
vmopt := &vm.VMOpts{
StateBase: state,
Epoch: ts.Height() + 1,
Rand: r,
Bstore: sm.cs.Blockstore(),
Syscalls: sm.cs.VMSys(),
CircSupplyCalc: sm.GetVMCirculatingSupply,
NtwkVersion: sm.GetNtwkVersion,
BaseFee: ts.Blocks()[0].ParentBaseFee,
LookbackState: LookbackStateGetterForTipset(sm, ts),
}
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)
}
}
fromActor, err := vmi.StateTree().GetActor(msg.From)
if err != nil {
return nil, xerrors.Errorf("call raw get actor: %s", err)
}
msg.Nonce = fromActor.Nonce
fromKey, err := sm.ResolveToKeyAddress(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),
},
}
}
ret, err := vmi.ApplyMessage(ctx, msgApply)
if err != 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: MakeMsgGasCost(msg, ret),
ExecutionTrace: ret.ExecutionTrace,
Error: errs,
Duration: ret.Duration,
}, nil
}
var errHaltExecution = fmt.Errorf("halt")
func (sm *StateManager) Replay(ctx context.Context, ts *types.TipSet, mcid cid.Cid) (*types.Message, *vm.ApplyRet, error) {
var outm *types.Message
var outr *vm.ApplyRet
_, _, err := sm.computeTipSetState(ctx, ts, func(c cid.Cid, m *types.Message, ret *vm.ApplyRet) error {
if c == mcid {
outm = m
outr = ret
return errHaltExecution
}
return nil
})
if err != nil && err != errHaltExecution {
return nil, nil, xerrors.Errorf("unexpected error during execution: %w", err)
}
if outr == nil {
return nil, nil, xerrors.Errorf("given message not found in tipset")
}
return outm, outr, nil
}