feat: sync multilayer td integration

internal/compat/android/layer_rpc.go

@@ -0,0 +1,38 @@
+package android
+
+import (
+	"errors"
+
+	"github.com/iamxvbaba/td/bin"
+	"github.com/iamxvbaba/td/tg"
+)
+
+var ErrPrivateLayerRPCInvalid = errors.New("android private layer RPC is invalid")
+
+// AdaptPrivateLayerRPC invokes the provenance-locked static gotdgen overlay
+// from the generated unknown-method view. Nested values decode with the exact
+// connection profile and the canonical request is re-profiled by gotd core.
+func AdaptPrivateLayerRPC(view tg.LayerRPCUnknownMethodView) (tg.LayerOutboundCall, bool, error) {
+	outbound, handled, err := view.AdaptClientRPCOverlay(tg.LayerClientRPCOverlayDrkloAndroid)
+	if err == nil && !handled {
+		outbound, handled, err = view.AdaptClientRPCOverlay(tg.LayerClientRPCOverlayDrkloAndroidTheme)
+	}
+	if err != nil {
+		return tg.LayerOutboundCall{}, handled, errors.Join(ErrPrivateLayerRPCInvalid, err)
+	}
+	return outbound, handled, nil
+}
+
+// UpgradePrivateLayerRPC is retained only for Router.Dispatch's legacy test
+// seam. Production admission uses AdaptPrivateLayerRPC above so its decode
+// shares the outer generated request budget.
+func UpgradePrivateLayerRPC(profile tg.LayerProfile, in *bin.Buffer, limits tg.LayerDecodeLimits) (*bin.Buffer, bool, error) {
+	upgraded, handled, err := tg.AdaptClientRPCOverlayWithLimits(profile, tg.LayerClientRPCOverlayDrkloAndroid, in, limits)
+	if err == nil && !handled {
+		upgraded, handled, err = tg.AdaptClientRPCOverlayWithLimits(profile, tg.LayerClientRPCOverlayDrkloAndroidTheme, in, limits)
+	}
+	if err != nil {
+		return nil, handled, errors.Join(ErrPrivateLayerRPCInvalid, err)
+	}
+	return upgraded, handled, nil
+}