add state replay api and command

node/impl/full/state.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"strconv"
 
+	cid "github.com/ipfs/go-cid"
 	"github.com/ipfs/go-hamt-ipld"
 	cbor "github.com/ipfs/go-ipld-cbor"
 	"github.com/libp2p/go-libp2p-core/peer"
@@ -194,6 +195,24 @@ func (a *StateAPI) StateCall(ctx context.Context, msg *types.Message, ts *types.
 	return a.StateManager.Call(ctx, msg, ts)
 }
 
+func (a *StateAPI) StateReplay(ctx context.Context, ts *types.TipSet, mc cid.Cid) (*api.ReplayResults, error) {
+	m, r, err := a.StateManager.Replay(ctx, ts, mc)
+	if err != nil {
+		return nil, err
+	}
+
+	var errstr string
+	if r.ActorErr != nil {
+		errstr = r.ActorErr.Error()
+	}
+
+	return &api.ReplayResults{
+		Msg:     m,
+		Receipt: &r.MessageReceipt,
+		Error:   errstr,
+	}, nil
+}
+
 func (a *StateAPI) stateForTs(ts *types.TipSet) (*state.StateTree, error) {
 	if ts == nil {
 		ts = a.Chain.GetHeaviestTipSet()