package vm import ( "context" "fmt" "os" cid "github.com/ipfs/go-cid" "github.com/filecoin-project/go-state-types/network" "github.com/filecoin-project/lotus/chain/types" ) // stat counters var ( StatSends uint64 StatApplied uint64 ) type ExecutionLane int const ( // ExecutionLaneDefault signifies a default, non prioritized execution lane. ExecutionLaneDefault ExecutionLane = iota // ExecutionLanePriority signifies a prioritized execution lane with reserved resources. ExecutionLanePriority ) type Interface interface { // Applies the given message onto the VM's current state, returning the result of the execution ApplyMessage(ctx context.Context, cmsg types.ChainMsg) (*ApplyRet, error) // Same as above but for system messages (the Cron invocation and block reward payments). // Must NEVER fail. ApplyImplicitMessage(ctx context.Context, msg *types.Message) (*ApplyRet, error) // Flush all buffered objects into the state store provided to the VM at construction. Flush(ctx context.Context) (cid.Cid, error) } // WARNING: You will not affect your node's execution by misusing this feature, but you will confuse yourself thoroughly! // An envvar that allows the user to specify debug actors bundles to be used by the FVM // alongside regular execution. This is basically only to be used to print out specific logging information. // Message failures, unexpected terminations,gas costs, etc. should all be ignored. var useFvmDebug = os.Getenv("LOTUS_FVM_DEVELOPER_DEBUG") == "1" func makeVM(ctx context.Context, opts *VMOpts) (Interface, error) { if opts.NetworkVersion >= network.Version16 { if useFvmDebug { return NewDualExecutionFVM(ctx, opts) } return NewFVM(ctx, opts) } return NewLegacyVM(ctx, opts) } func NewVM(ctx context.Context, opts *VMOpts) (Interface, error) { switch opts.ExecutionLane { case ExecutionLaneDefault, ExecutionLanePriority: default: return nil, fmt.Errorf("invalid execution lane: %d", opts.ExecutionLane) } vmi, err := makeVM(ctx, opts) if err != nil { return nil, err } return newVMExecutor(vmi, opts.ExecutionLane), nil }