package vm import ( "bytes" "context" "fmt" "sync/atomic" "time" "github.com/filecoin-project/lotus/chain/actors/builtin" "github.com/filecoin-project/lotus/metrics" block "github.com/ipfs/go-block-format" cid "github.com/ipfs/go-cid" cbor "github.com/ipfs/go-ipld-cbor" logging "github.com/ipfs/go-log/v2" mh "github.com/multiformats/go-multihash" cbg "github.com/whyrusleeping/cbor-gen" "go.opencensus.io/stats" "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/exitcode" "github.com/filecoin-project/go-state-types/network" "github.com/filecoin-project/lotus/blockstore" "github.com/filecoin-project/lotus/build" "github.com/filecoin-project/lotus/chain/actors/adt" "github.com/filecoin-project/lotus/chain/actors/aerrors" "github.com/filecoin-project/lotus/chain/actors/builtin/account" "github.com/filecoin-project/lotus/chain/actors/builtin/miner" "github.com/filecoin-project/lotus/chain/actors/builtin/reward" "github.com/filecoin-project/lotus/chain/state" "github.com/filecoin-project/lotus/chain/types" ) const MaxCallDepth = 4096 var ( log = logging.Logger("vm") actorLog = logging.Logger("actors") gasOnActorExec = newGasCharge("OnActorExec", 0, 0) ) // stat counters var ( StatSends uint64 StatApplied uint64 ) // ResolveToKeyAddr returns the public key type of address (`BLS`/`SECP256K1`) of an account actor identified by `addr`. func ResolveToKeyAddr(state types.StateTree, cst cbor.IpldStore, addr address.Address) (address.Address, error) { if addr.Protocol() == address.BLS || addr.Protocol() == address.SECP256K1 { return addr, nil } act, err := state.GetActor(addr) if err != nil { return address.Undef, xerrors.Errorf("failed to find actor: %s", addr) } aast, err := account.Load(adt.WrapStore(context.TODO(), cst), act) if err != nil { return address.Undef, xerrors.Errorf("failed to get account actor state for %s: %w", addr, err) } return aast.PubkeyAddress() } var ( _ cbor.IpldBlockstore = (*gasChargingBlocks)(nil) _ blockstore.Viewer = (*gasChargingBlocks)(nil) ) type gasChargingBlocks struct { chargeGas func(GasCharge) pricelist Pricelist under cbor.IpldBlockstore } func (bs *gasChargingBlocks) View(c cid.Cid, cb func([]byte) error) error { if v, ok := bs.under.(blockstore.Viewer); ok { bs.chargeGas(bs.pricelist.OnIpldGet()) return v.View(c, func(b []byte) error { // we have successfully retrieved the value; charge for it, even if the user-provided function fails. bs.chargeGas(newGasCharge("OnIpldViewEnd", 0, 0).WithExtra(len(b))) bs.chargeGas(gasOnActorExec) return cb(b) }) } // the underlying blockstore doesn't implement the viewer interface, fall back to normal Get behaviour. blk, err := bs.Get(c) if err == nil && blk != nil { return cb(blk.RawData()) } return err } func (bs *gasChargingBlocks) Get(c cid.Cid) (block.Block, error) { bs.chargeGas(bs.pricelist.OnIpldGet()) blk, err := bs.under.Get(c) if err != nil { return nil, aerrors.Escalate(err, "failed to get block from blockstore") } bs.chargeGas(newGasCharge("OnIpldGetEnd", 0, 0).WithExtra(len(blk.RawData()))) bs.chargeGas(gasOnActorExec) return blk, nil } func (bs *gasChargingBlocks) Put(blk block.Block) error { bs.chargeGas(bs.pricelist.OnIpldPut(len(blk.RawData()))) if err := bs.under.Put(blk); err != nil { return aerrors.Escalate(err, "failed to write data to disk") } bs.chargeGas(gasOnActorExec) return nil } func (vm *VM) makeRuntime(ctx context.Context, msg *types.Message, parent *Runtime) *Runtime { rt := &Runtime{ ctx: ctx, vm: vm, state: vm.cstate, origin: msg.From, originNonce: msg.Nonce, height: vm.blockHeight, gasUsed: 0, gasAvailable: msg.GasLimit, depth: 0, numActorsCreated: 0, pricelist: PricelistByVersion(vm.ntwkVersion(ctx, vm.blockHeight)), allowInternal: true, callerValidated: false, executionTrace: types.ExecutionTrace{Msg: msg}, } if parent != nil { // TODO: The version check here should be unnecessary, but we can wait to take it out if !parent.allowInternal && rt.NetworkVersion() >= network.Version7 { rt.Abortf(exitcode.SysErrForbidden, "internal calls currently disabled") } rt.gasUsed = parent.gasUsed rt.origin = parent.origin rt.originNonce = parent.originNonce rt.numActorsCreated = parent.numActorsCreated rt.depth = parent.depth + 1 } if rt.depth > MaxCallDepth && rt.NetworkVersion() >= network.Version6 { rt.Abortf(exitcode.SysErrForbidden, "message execution exceeds call depth") } cbb := &gasChargingBlocks{rt.chargeGasFunc(2), rt.pricelist, vm.cst.Blocks} cst := cbor.NewCborStore(cbb) cst.Atlas = vm.cst.Atlas // associate the atlas. rt.cst = cst vmm := *msg resF, ok := rt.ResolveAddress(msg.From) if !ok { rt.Abortf(exitcode.SysErrInvalidReceiver, "resolve msg.From address failed") } vmm.From = resF if vm.ntwkVersion(ctx, vm.blockHeight) <= network.Version3 { rt.Message = &vmm } else { resT, _ := rt.ResolveAddress(msg.To) // may be set to undef if recipient doesn't exist yet vmm.To = resT rt.Message = &Message{msg: vmm} } rt.Syscalls = pricedSyscalls{ under: vm.Syscalls(ctx, rt), chargeGas: rt.chargeGasFunc(1), pl: rt.pricelist, } return rt } type UnsafeVM struct { VM *VM } func (vm *UnsafeVM) MakeRuntime(ctx context.Context, msg *types.Message) *Runtime { return vm.VM.makeRuntime(ctx, msg, nil) } type ( CircSupplyCalculator func(context.Context, abi.ChainEpoch, *state.StateTree) (abi.TokenAmount, error) NtwkVersionGetter func(context.Context, abi.ChainEpoch) network.Version LookbackStateGetter func(context.Context, abi.ChainEpoch) (*state.StateTree, error) ) type VM struct { cstate *state.StateTree // TODO: Is base actually used? Can we delete it? base cid.Cid cst *cbor.BasicIpldStore buf *blockstore.BufferedBlockstore blockHeight abi.ChainEpoch areg *ActorRegistry rand Rand circSupplyCalc CircSupplyCalculator ntwkVersion NtwkVersionGetter baseFee abi.TokenAmount lbStateGet LookbackStateGetter Syscalls SyscallBuilder } type VMOpts struct { StateBase cid.Cid Epoch abi.ChainEpoch Rand Rand Bstore blockstore.Blockstore Syscalls SyscallBuilder CircSupplyCalc CircSupplyCalculator NtwkVersion NtwkVersionGetter // TODO: stebalien: In what cases do we actually need this? It seems like even when creating new networks we want to use the 'global'/build-default version getter BaseFee abi.TokenAmount LookbackState LookbackStateGetter } func NewVM(ctx context.Context, opts *VMOpts) (*VM, error) { buf := blockstore.NewBuffered(opts.Bstore) cst := cbor.NewCborStore(buf) state, err := state.LoadStateTree(cst, opts.StateBase) if err != nil { return nil, err } return &VM{ cstate: state, base: opts.StateBase, cst: cst, buf: buf, blockHeight: opts.Epoch, areg: NewActorRegistry(), rand: opts.Rand, // TODO: Probably should be a syscall circSupplyCalc: opts.CircSupplyCalc, ntwkVersion: opts.NtwkVersion, Syscalls: opts.Syscalls, baseFee: opts.BaseFee, lbStateGet: opts.LookbackState, }, nil } type Rand interface { GetChainRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) GetChainRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) GetBeaconRandomnessLookingBack(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) GetBeaconRandomnessLookingForward(ctx context.Context, pers crypto.DomainSeparationTag, round abi.ChainEpoch, entropy []byte) ([]byte, error) } type ApplyRet struct { types.MessageReceipt ActorErr aerrors.ActorError ExecutionTrace types.ExecutionTrace Duration time.Duration GasCosts *GasOutputs } func (vm *VM) send(ctx context.Context, msg *types.Message, parent *Runtime, gasCharge *GasCharge, start time.Time) ([]byte, aerrors.ActorError, *Runtime) { defer atomic.AddUint64(&StatSends, 1) st := vm.cstate rt := vm.makeRuntime(ctx, msg, parent) if EnableGasTracing { rt.lastGasChargeTime = start if parent != nil { rt.lastGasChargeTime = parent.lastGasChargeTime rt.lastGasCharge = parent.lastGasCharge defer func() { parent.lastGasChargeTime = rt.lastGasChargeTime parent.lastGasCharge = rt.lastGasCharge }() } } if parent != nil { defer func() { parent.gasUsed = rt.gasUsed }() } if gasCharge != nil { if err := rt.chargeGasSafe(*gasCharge); err != nil { // this should never happen return nil, aerrors.Wrap(err, "not enough gas for initial message charge, this should not happen"), rt } } ret, err := func() ([]byte, aerrors.ActorError) { _ = rt.chargeGasSafe(newGasCharge("OnGetActor", 0, 0)) toActor, err := st.GetActor(msg.To) if err != nil { if xerrors.Is(err, types.ErrActorNotFound) { a, aid, err := TryCreateAccountActor(rt, msg.To) if err != nil { return nil, aerrors.Wrapf(err, "could not create account") } toActor = a if vm.ntwkVersion(ctx, vm.blockHeight) <= network.Version3 { // Leave the rt.Message as is } else { nmsg := Message{ msg: types.Message{ To: aid, From: rt.Message.Caller(), Value: rt.Message.ValueReceived(), }, } rt.Message = &nmsg } } else { return nil, aerrors.Escalate(err, "getting actor") } } if aerr := rt.chargeGasSafe(rt.Pricelist().OnMethodInvocation(msg.Value, msg.Method)); aerr != nil { return nil, aerrors.Wrap(aerr, "not enough gas for method invocation") } // not charging any gas, just logging //nolint:errcheck defer rt.chargeGasSafe(newGasCharge("OnMethodInvocationDone", 0, 0)) if types.BigCmp(msg.Value, types.NewInt(0)) != 0 { if err := vm.transfer(msg.From, msg.To, msg.Value); err != nil { return nil, aerrors.Wrap(err, "failed to transfer funds") } } if msg.Method != 0 { var ret []byte _ = rt.chargeGasSafe(gasOnActorExec) ret, err := vm.Invoke(toActor, rt, msg.Method, msg.Params) return ret, err } return nil, nil }() mr := types.MessageReceipt{ ExitCode: aerrors.RetCode(err), Return: ret, GasUsed: rt.gasUsed, } rt.executionTrace.MsgRct = &mr rt.executionTrace.Duration = time.Since(start) if err != nil { rt.executionTrace.Error = err.Error() } return ret, err, rt } func checkMessage(msg *types.Message) error { if msg.GasLimit == 0 { return xerrors.Errorf("message has no gas limit set") } if msg.GasLimit < 0 { return xerrors.Errorf("message has negative gas limit") } if msg.GasFeeCap == types.EmptyInt { return xerrors.Errorf("message fee cap not set") } if msg.GasPremium == types.EmptyInt { return xerrors.Errorf("message gas premium not set") } if msg.Value == types.EmptyInt { return xerrors.Errorf("message no value set") } return nil } func (vm *VM) ApplyImplicitMessage(ctx context.Context, msg *types.Message) (*ApplyRet, error) { start := build.Clock.Now() defer atomic.AddUint64(&StatApplied, 1) ret, actorErr, rt := vm.send(ctx, msg, nil, nil, start) rt.finilizeGasTracing() return &ApplyRet{ MessageReceipt: types.MessageReceipt{ ExitCode: aerrors.RetCode(actorErr), Return: ret, GasUsed: 0, }, ActorErr: actorErr, ExecutionTrace: rt.executionTrace, GasCosts: nil, Duration: time.Since(start), }, actorErr } func (vm *VM) ApplyMessage(ctx context.Context, cmsg types.ChainMsg) (*ApplyRet, error) { start := build.Clock.Now() ctx, span := trace.StartSpan(ctx, "vm.ApplyMessage") defer span.End() defer atomic.AddUint64(&StatApplied, 1) msg := cmsg.VMMessage() if span.IsRecordingEvents() { span.AddAttributes( trace.StringAttribute("to", msg.To.String()), trace.Int64Attribute("method", int64(msg.Method)), trace.StringAttribute("value", msg.Value.String()), ) } if err := checkMessage(msg); err != nil { return nil, err } pl := PricelistByVersion(vm.ntwkVersion(ctx, vm.blockHeight)) msgGas := pl.OnChainMessage(cmsg.ChainLength()) msgGasCost := msgGas.Total() // this should never happen, but is currently still exercised by some tests if msgGasCost > msg.GasLimit { gasOutputs := ZeroGasOutputs() gasOutputs.MinerPenalty = types.BigMul(vm.baseFee, abi.NewTokenAmount(msgGasCost)) return &ApplyRet{ MessageReceipt: types.MessageReceipt{ ExitCode: exitcode.SysErrOutOfGas, GasUsed: 0, }, GasCosts: &gasOutputs, Duration: time.Since(start), ActorErr: aerrors.Newf(exitcode.SysErrOutOfGas, "message gas limit does not cover on-chain gas costs"), }, nil } st := vm.cstate minerPenaltyAmount := types.BigMul(vm.baseFee, abi.NewTokenAmount(msg.GasLimit)) fromActor, err := st.GetActor(msg.From) // this should never happen, but is currently still exercised by some tests if err != nil { if xerrors.Is(err, types.ErrActorNotFound) { gasOutputs := ZeroGasOutputs() gasOutputs.MinerPenalty = minerPenaltyAmount return &ApplyRet{ MessageReceipt: types.MessageReceipt{ ExitCode: exitcode.SysErrSenderInvalid, GasUsed: 0, }, ActorErr: aerrors.Newf(exitcode.SysErrSenderInvalid, "actor not found: %s", msg.From), GasCosts: &gasOutputs, Duration: time.Since(start), }, nil } return nil, xerrors.Errorf("failed to look up from actor: %w", err) } // this should never happen, but is currently still exercised by some tests if !builtin.IsAccountActor(fromActor.Code) { gasOutputs := ZeroGasOutputs() gasOutputs.MinerPenalty = minerPenaltyAmount return &ApplyRet{ MessageReceipt: types.MessageReceipt{ ExitCode: exitcode.SysErrSenderInvalid, GasUsed: 0, }, ActorErr: aerrors.Newf(exitcode.SysErrSenderInvalid, "send from not account actor: %s", fromActor.Code), GasCosts: &gasOutputs, Duration: time.Since(start), }, nil } if msg.Nonce != fromActor.Nonce { gasOutputs := ZeroGasOutputs() gasOutputs.MinerPenalty = minerPenaltyAmount return &ApplyRet{ MessageReceipt: types.MessageReceipt{ ExitCode: exitcode.SysErrSenderStateInvalid, GasUsed: 0, }, ActorErr: aerrors.Newf(exitcode.SysErrSenderStateInvalid, "actor nonce invalid: msg:%d != state:%d", msg.Nonce, fromActor.Nonce), GasCosts: &gasOutputs, Duration: time.Since(start), }, nil } gascost := types.BigMul(types.NewInt(uint64(msg.GasLimit)), msg.GasFeeCap) if fromActor.Balance.LessThan(gascost) { gasOutputs := ZeroGasOutputs() gasOutputs.MinerPenalty = minerPenaltyAmount return &ApplyRet{ MessageReceipt: types.MessageReceipt{ ExitCode: exitcode.SysErrSenderStateInvalid, GasUsed: 0, }, ActorErr: aerrors.Newf(exitcode.SysErrSenderStateInvalid, "actor balance less than needed: %s < %s", types.FIL(fromActor.Balance), types.FIL(gascost)), GasCosts: &gasOutputs, Duration: time.Since(start), }, nil } gasHolder := &types.Actor{Balance: types.NewInt(0)} if err := vm.transferToGasHolder(msg.From, gasHolder, gascost); err != nil { return nil, xerrors.Errorf("failed to withdraw gas funds: %w", err) } if err := vm.incrementNonce(msg.From); err != nil { return nil, err } if err := st.Snapshot(ctx); err != nil { return nil, xerrors.Errorf("snapshot failed: %w", err) } defer st.ClearSnapshot() ret, actorErr, rt := vm.send(ctx, msg, nil, &msgGas, start) if aerrors.IsFatal(actorErr) { return nil, xerrors.Errorf("[from=%s,to=%s,n=%d,m=%d,h=%d] fatal error: %w", msg.From, msg.To, msg.Nonce, msg.Method, vm.blockHeight, actorErr) } if actorErr != nil { log.Warnw("Send actor error", "from", msg.From, "to", msg.To, "nonce", msg.Nonce, "method", msg.Method, "height", vm.blockHeight, "error", fmt.Sprintf("%+v", actorErr)) } if actorErr != nil && len(ret) != 0 { // This should not happen, something is wonky return nil, xerrors.Errorf("message invocation errored, but had a return value anyway: %w", actorErr) } if rt == nil { return nil, xerrors.Errorf("send returned nil runtime, send error was: %s", actorErr) } if len(ret) != 0 { // safely override actorErr since it must be nil actorErr = rt.chargeGasSafe(rt.Pricelist().OnChainReturnValue(len(ret))) if actorErr != nil { ret = nil } } var errcode exitcode.ExitCode var gasUsed int64 if errcode = aerrors.RetCode(actorErr); errcode != 0 { // revert all state changes since snapshot if err := st.Revert(); err != nil { return nil, xerrors.Errorf("revert state failed: %w", err) } } rt.finilizeGasTracing() gasUsed = rt.gasUsed if gasUsed < 0 { gasUsed = 0 } burn, err := vm.ShouldBurn(ctx, st, msg, errcode) if err != nil { return nil, xerrors.Errorf("deciding whether should burn failed: %w", err) } gasOutputs := ComputeGasOutputs(gasUsed, msg.GasLimit, vm.baseFee, msg.GasFeeCap, msg.GasPremium, burn) if err := vm.transferFromGasHolder(builtin.BurntFundsActorAddr, gasHolder, gasOutputs.BaseFeeBurn); err != nil { return nil, xerrors.Errorf("failed to burn base fee: %w", err) } if err := vm.transferFromGasHolder(reward.Address, gasHolder, gasOutputs.MinerTip); err != nil { return nil, xerrors.Errorf("failed to give miner gas reward: %w", err) } if err := vm.transferFromGasHolder(builtin.BurntFundsActorAddr, gasHolder, gasOutputs.OverEstimationBurn); err != nil { return nil, xerrors.Errorf("failed to burn overestimation fee: %w", err) } // refund unused gas if err := vm.transferFromGasHolder(msg.From, gasHolder, gasOutputs.Refund); err != nil { return nil, xerrors.Errorf("failed to refund gas: %w", err) } if types.BigCmp(types.NewInt(0), gasHolder.Balance) != 0 { return nil, xerrors.Errorf("gas handling math is wrong") } return &ApplyRet{ MessageReceipt: types.MessageReceipt{ ExitCode: errcode, Return: ret, GasUsed: gasUsed, }, ActorErr: actorErr, ExecutionTrace: rt.executionTrace, GasCosts: &gasOutputs, Duration: time.Since(start), }, nil } func (vm *VM) ShouldBurn(ctx context.Context, st *state.StateTree, msg *types.Message, errcode exitcode.ExitCode) (bool, error) { if vm.ntwkVersion(ctx, vm.blockHeight) <= network.Version12 { // Check to see if we should burn funds. We avoid burning on successful // window post. This won't catch _indirect_ window post calls, but this // is the best we can get for now. if vm.blockHeight > build.UpgradeClausHeight && errcode == exitcode.Ok && msg.Method == miner.Methods.SubmitWindowedPoSt { // Ok, we've checked the _method_, but we still need to check // the target actor. It would be nice if we could just look at // the trace, but I'm not sure if that's safe? if toActor, err := st.GetActor(msg.To); err != nil { // If the actor wasn't found, we probably deleted it or something. Move on. if !xerrors.Is(err, types.ErrActorNotFound) { // Otherwise, this should never fail and something is very wrong. return false, xerrors.Errorf("failed to lookup target actor: %w", err) } } else if builtin.IsStorageMinerActor(toActor.Code) { // Ok, this is a storage miner and we've processed a window post. Remove the burn. return false, nil } } return true, nil } // Any "don't burn" rules from Network v13 onwards go here, for now we always return true return true, nil } func (vm *VM) ActorBalance(addr address.Address) (types.BigInt, aerrors.ActorError) { act, err := vm.cstate.GetActor(addr) if err != nil { return types.EmptyInt, aerrors.Absorb(err, 1, "failed to find actor") } return act.Balance, nil } type vmFlushKey struct{} func (vm *VM) Flush(ctx context.Context) (cid.Cid, error) { _, span := trace.StartSpan(ctx, "vm.Flush") defer span.End() from := vm.buf to := vm.buf.Read() root, err := vm.cstate.Flush(ctx) if err != nil { return cid.Undef, xerrors.Errorf("flushing vm: %w", err) } if err := Copy(context.WithValue(ctx, vmFlushKey{}, true), from, to, root); err != nil { return cid.Undef, xerrors.Errorf("copying tree: %w", err) } return root, nil } // Get the buffered blockstore associated with the VM. This includes any temporary blocks produced // during this VM's execution. func (vm *VM) ActorStore(ctx context.Context) adt.Store { return adt.WrapStore(ctx, vm.cst) } func linksForObj(blk block.Block, cb func(cid.Cid)) error { switch blk.Cid().Prefix().Codec { case cid.DagCBOR: err := cbg.ScanForLinks(bytes.NewReader(blk.RawData()), cb) if err != nil { return xerrors.Errorf("cbg.ScanForLinks: %w", err) } return nil case cid.Raw: // We implicitly have all children of raw blocks. return nil default: return xerrors.Errorf("vm flush copy method only supports dag cbor") } } func Copy(ctx context.Context, from, to blockstore.Blockstore, root cid.Cid) error { ctx, span := trace.StartSpan(ctx, "vm.Copy") // nolint defer span.End() start := time.Now() var numBlocks int var totalCopySize int const batchSize = 128 const bufCount = 3 freeBufs := make(chan []block.Block, bufCount) toFlush := make(chan []block.Block, bufCount) for i := 0; i < bufCount; i++ { freeBufs <- make([]block.Block, 0, batchSize) } errFlushChan := make(chan error) go func() { for b := range toFlush { if err := to.PutMany(b); err != nil { close(freeBufs) errFlushChan <- xerrors.Errorf("batch put in copy: %w", err) return } freeBufs <- b[:0] } close(errFlushChan) close(freeBufs) }() batch := <-freeBufs batchCp := func(blk block.Block) error { numBlocks++ totalCopySize += len(blk.RawData()) batch = append(batch, blk) if len(batch) >= batchSize { toFlush <- batch var ok bool batch, ok = <-freeBufs if !ok { return <-errFlushChan } } return nil } if err := copyRec(from, to, root, batchCp); err != nil { return xerrors.Errorf("copyRec: %w", err) } if len(batch) > 0 { toFlush <- batch } close(toFlush) // close the toFlush triggering the loop to end err := <-errFlushChan // get error out or get nil if it was closed if err != nil { return err } span.AddAttributes( trace.Int64Attribute("numBlocks", int64(numBlocks)), trace.Int64Attribute("copySize", int64(totalCopySize)), ) if yes, ok := ctx.Value(vmFlushKey{}).(bool); yes && ok { took := metrics.SinceInMilliseconds(start) stats.Record(ctx, metrics.VMFlushCopyCount.M(int64(numBlocks)), metrics.VMFlushCopyDuration.M(took)) } return nil } func copyRec(from, to blockstore.Blockstore, root cid.Cid, cp func(block.Block) error) error { if root.Prefix().MhType == 0 { // identity cid, skip return nil } blk, err := from.Get(root) if err != nil { return xerrors.Errorf("get %s failed: %w", root, err) } var lerr error err = linksForObj(blk, func(link cid.Cid) { if lerr != nil { // Theres no erorr return on linksForObj callback :( return } prefix := link.Prefix() if prefix.Codec == cid.FilCommitmentSealed || prefix.Codec == cid.FilCommitmentUnsealed { return } // We always have blocks inlined into CIDs, but we may not have their children. if prefix.MhType == mh.IDENTITY { // Unless the inlined block has no children. if prefix.Codec == cid.Raw { return } } else { // If we have an object, we already have its children, skip the object. has, err := to.Has(link) if err != nil { lerr = xerrors.Errorf("has: %w", err) return } if has { return } } if err := copyRec(from, to, link, cp); err != nil { lerr = err return } }) if err != nil { return xerrors.Errorf("linksForObj (%x): %w", blk.RawData(), err) } if lerr != nil { return lerr } if err := cp(blk); err != nil { return xerrors.Errorf("copy: %w", err) } return nil } func (vm *VM) StateTree() types.StateTree { return vm.cstate } func (vm *VM) SetBlockHeight(h abi.ChainEpoch) { vm.blockHeight = h } func (vm *VM) Invoke(act *types.Actor, rt *Runtime, method abi.MethodNum, params []byte) ([]byte, aerrors.ActorError) { ctx, span := trace.StartSpan(rt.ctx, "vm.Invoke") defer span.End() if span.IsRecordingEvents() { span.AddAttributes( trace.StringAttribute("to", rt.Receiver().String()), trace.Int64Attribute("method", int64(method)), trace.StringAttribute("value", rt.ValueReceived().String()), ) } var oldCtx context.Context oldCtx, rt.ctx = rt.ctx, ctx defer func() { rt.ctx = oldCtx }() ret, err := vm.areg.Invoke(act.Code, rt, method, params) if err != nil { return nil, err } return ret, nil } func (vm *VM) SetInvoker(i *ActorRegistry) { vm.areg = i } func (vm *VM) GetNtwkVersion(ctx context.Context, ce abi.ChainEpoch) network.Version { return vm.ntwkVersion(ctx, ce) } func (vm *VM) GetCircSupply(ctx context.Context) (abi.TokenAmount, error) { return vm.circSupplyCalc(ctx, vm.blockHeight, vm.cstate) } func (vm *VM) incrementNonce(addr address.Address) error { return vm.cstate.MutateActor(addr, func(a *types.Actor) error { a.Nonce++ return nil }) } func (vm *VM) transfer(from, to address.Address, amt types.BigInt) aerrors.ActorError { if from == to { return nil } fromID, err := vm.cstate.LookupID(from) if err != nil { return aerrors.Fatalf("transfer failed when resolving sender address: %s", err) } toID, err := vm.cstate.LookupID(to) if err != nil { return aerrors.Fatalf("transfer failed when resolving receiver address: %s", err) } if fromID == toID { return nil } if amt.LessThan(types.NewInt(0)) { return aerrors.Newf(exitcode.SysErrForbidden, "attempted to transfer negative value: %s", amt) } f, err := vm.cstate.GetActor(fromID) if err != nil { return aerrors.Fatalf("transfer failed when retrieving sender actor: %s", err) } t, err := vm.cstate.GetActor(toID) if err != nil { return aerrors.Fatalf("transfer failed when retrieving receiver actor: %s", err) } if err := deductFunds(f, amt); err != nil { return aerrors.Newf(exitcode.SysErrInsufficientFunds, "transfer failed when deducting funds (%s): %s", types.FIL(amt), err) } depositFunds(t, amt) if err := vm.cstate.SetActor(fromID, f); err != nil { return aerrors.Fatalf("transfer failed when setting receiver actor: %s", err) } if err := vm.cstate.SetActor(toID, t); err != nil { return aerrors.Fatalf("transfer failed when setting sender actor: %s", err) } return nil } func (vm *VM) transferToGasHolder(addr address.Address, gasHolder *types.Actor, amt types.BigInt) error { if amt.LessThan(types.NewInt(0)) { return xerrors.Errorf("attempted to transfer negative value to gas holder") } return vm.cstate.MutateActor(addr, func(a *types.Actor) error { if err := deductFunds(a, amt); err != nil { return err } depositFunds(gasHolder, amt) return nil }) } func (vm *VM) transferFromGasHolder(addr address.Address, gasHolder *types.Actor, amt types.BigInt) error { if amt.LessThan(types.NewInt(0)) { return xerrors.Errorf("attempted to transfer negative value from gas holder") } if amt.Equals(big.NewInt(0)) { return nil } return vm.cstate.MutateActor(addr, func(a *types.Actor) error { if err := deductFunds(gasHolder, amt); err != nil { return err } depositFunds(a, amt) return nil }) } func deductFunds(act *types.Actor, amt types.BigInt) error { if act.Balance.LessThan(amt) { return fmt.Errorf("not enough funds") } act.Balance = types.BigSub(act.Balance, amt) return nil } func depositFunds(act *types.Actor, amt types.BigInt) { act.Balance = types.BigAdd(act.Balance, amt) }