package events import ( "context" "golang.org/x/xerrors" "github.com/filecoin-project/lotus/chain/types" ) func (me *messageEvents) CheckMsg(ctx context.Context, smsg types.ChainMsg, hnd MsgHandler) CheckFunc { msg := smsg.VMMessage() return func(ts *types.TipSet) (done bool, more bool, err error) { fa, err := me.cs.StateGetActor(ctx, msg.From, ts.Key()) if err != nil { return false, true, err } // >= because actor nonce is actually the next nonce that is expected to appear on chain if msg.Nonce >= fa.Nonce { return false, true, nil } rec, err := me.cs.StateGetReceipt(ctx, smsg.VMMessage().Cid(), ts.Key()) if err != nil { return false, true, xerrors.Errorf("getting receipt in CheckMsg: %w", err) } more, err = hnd(msg, rec, ts, ts.Height()) return true, more, err } } func (me *messageEvents) MatchMsg(inmsg *types.Message) MsgMatchFunc { return func(msg *types.Message) (matchOnce bool, matched bool, err error) { if msg.From == inmsg.From && msg.Nonce == inmsg.Nonce && !inmsg.Equals(msg) { return true, false, xerrors.Errorf("matching msg %s from %s, nonce %d: got duplicate origin/nonce msg %d", inmsg.Cid(), inmsg.From, inmsg.Nonce, msg.Nonce) } return true, inmsg.Equals(msg), nil } }