diff --git a/lib/rain.orderbook b/lib/rain.orderbook
index 253e2da..ce71151 160000
--- a/lib/rain.orderbook
+++ b/lib/rain.orderbook
@@ -1 +1 @@
-Subproject commit 253e2da506eac3bfbc71d6bce4fff0c90bd38592
+Subproject commit ce71151ea790f2399c12c100bfd33fe82ec85d42
diff --git a/src/lib/LibComposeOrder.sol b/src/lib/LibComposeOrder.sol
index bc55e92..ea2fbfa 100644
--- a/src/lib/LibComposeOrder.sol
+++ b/src/lib/LibComposeOrder.sol
@@ -14,7 +14,7 @@ library LibComposeOrders {
         string memory scenario,
         string memory buildPath,
         string memory manifestPath
-    ) internal returns (bytes memory trancheOrder) {
+    ) internal returns (bytes memory composedOrder) {
         string[] memory ffi = new string[](16);
         ffi[0] = "nix";
         ffi[1] = "develop";
@@ -33,6 +33,35 @@ library LibComposeOrders {
         ffi[14] = "-s";
         ffi[15] = scenario;
 
-        trancheOrder = vm.ffi(ffi);
+        composedOrder = vm.ffi(ffi);
+    }
+
+    function getComposedPostAddOrder(
+        Vm vm,
+        string memory filePath,
+        string memory scenario,
+        string memory buildPath,
+        string memory manifestPath
+    ) internal returns (bytes memory composedSource) {
+        string[] memory ffi = new string[](17);
+        ffi[0] = "nix";
+        ffi[1] = "develop";
+        ffi[2] = buildPath;
+        ffi[3] = "--command";
+        ffi[4] = "cargo";
+        ffi[5] = "run";
+        ffi[6] = "--manifest-path";
+        ffi[7] = manifestPath;
+        ffi[8] = "--package";
+        ffi[9] = "rain_orderbook_cli";
+        ffi[10] = "order";
+        ffi[11] = "compose";
+        ffi[12] = "-f";
+        ffi[13] = filePath;
+        ffi[14] = "-s";
+        ffi[15] = scenario;
+        ffi[16] = "-p";
+
+        composedSource = vm.ffi(ffi);
     }
 }