gateway: Add support for Version method

api/api_gateway.go

@@ -58,4 +58,5 @@ type Gateway interface {
 	StateSearchMsg(ctx context.Context, from types.TipSetKey, msg cid.Cid, limit abi.ChainEpoch, allowReplaced bool) (*MsgLookup, error)
 	StateWaitMsg(ctx context.Context, cid cid.Cid, confidence uint64, limit abi.ChainEpoch, allowReplaced bool) (*MsgLookup, error)
 	WalletBalance(context.Context, address.Address) (types.BigInt, error)
+	Version(context.Context) (APIVersion, error)
 }

api/v0api/gateway.go

@@ -63,6 +63,7 @@ type Gateway interface {
 	StateVerifiedClientStatus(ctx context.Context, addr address.Address, tsk types.TipSetKey) (*abi.StoragePower, error)
 	StateWaitMsg(ctx context.Context, msg cid.Cid, confidence uint64) (*api.MsgLookup, error)
 	WalletBalance(context.Context, address.Address) (types.BigInt, error)
+	Version(context.Context) (api.APIVersion, error)
 }
 
 var _ Gateway = *new(FullNode)

api/wrap.go

@@ -26,6 +26,27 @@ func Wrap(proxyT, wrapperT, impl interface{}) interface{} {
 		}))
 	}
 
+	for i := 0; i < proxy.Elem().NumField(); i++ {
+		if proxy.Elem().Type().Field(i).Name == "Internal" {
+			continue
+		}
+
+		subProxy := proxy.Elem().Field(i).FieldByName("Internal")
+		for i := 0; i < ri.NumMethod(); i++ {
+			mt := ri.Type().Method(i)
+			if subProxy.FieldByName(mt.Name).Kind() == reflect.Invalid {
+				continue
+			}
+
+			fn := ri.Method(i)
+			of := subProxy.FieldByName(mt.Name)
+
+			subProxy.FieldByName(mt.Name).Set(reflect.MakeFunc(of.Type(), func(args []reflect.Value) (results []reflect.Value) {
+				return fn.Call(args)
+			}))
+		}
+	}
+
 	wp := reflect.New(reflect.TypeOf(wrapperT).Elem())
 	wp.Elem().Field(0).Set(proxy)
 	return wp.Interface()

gateway/node_test.go

@@ -233,3 +233,19 @@ func (m *mockGatewayDepsAPI) StateWaitMsgLimited(ctx context.Context, msg cid.Ci
 func (m *mockGatewayDepsAPI) StateReadState(ctx context.Context, act address.Address, ts types.TipSetKey) (*api.ActorState, error) {
 	panic("implement me")
 }
+
+func (m *mockGatewayDepsAPI) Version(context.Context) (api.APIVersion, error) {
+	return api.APIVersion{
+		APIVersion: api.FullAPIVersion1,
+	}, nil
+}
+
+func TestGatewayVersion(t *testing.T) {
+	ctx := context.Background()
+	mock := &mockGatewayDepsAPI{}
+	a := NewNode(mock, DefaultLookbackCap, DefaultStateWaitLookbackLimit)
+
+	v, err := a.Version(ctx)
+	require.NoError(t, err)
+	require.Equal(t, api.FullAPIVersion1, v.APIVersion)
+}