From 036e0fc23a71f417620e4afa865e406a78e90151 Mon Sep 17 00:00:00 2001
From: Mason Hall <masonhall@gmail.com>
Date: Sat, 4 Apr 2026 04:03:41 -0400
Subject: [PATCH] fix(x402): add tsdown config to build middleware entry point
 (#48)

* fix(x402): add tsdown config to build middleware entry point

* adds optimizeDeps.exclude and ssr.optimizeDeps.exclude for @emdash-cms/x402 in the integration's Vite config

* fix CI typecheck

---------

Co-authored-by: Matt Kane <mkane@cloudflare.com>
---
 packages/x402/src/index.ts     | 12 +++++++++++-
 packages/x402/tsdown.config.ts | 10 ++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 packages/x402/tsdown.config.ts

diff --git a/packages/x402/src/index.ts b/packages/x402/src/index.ts
index eaf378e..2605c9e 100644
--- a/packages/x402/src/index.ts
+++ b/packages/x402/src/index.ts
@@ -49,7 +49,9 @@ export function x402(config: X402Config): AstroIntegration {
 		name: "@emdash-cms/x402",
 		hooks: {
 			"astro:config:setup": ({ addMiddleware, updateConfig }) => {
-				// Inject the virtual module that provides config to the middleware
+				// Inject the virtual module that provides config to the middleware.
+				// The middleware must be excluded from Vite's SSR dependency optimizer
+				// because esbuild cannot resolve virtual modules — only Vite plugins can.
 				updateConfig({
 					vite: {
 						plugins: [
@@ -65,6 +67,14 @@ export function x402(config: X402Config): AstroIntegration {
 								},
 							},
 						],
+						optimizeDeps: {
+							exclude: ["@emdash-cms/x402"],
+						},
+						ssr: {
+							optimizeDeps: {
+								exclude: ["@emdash-cms/x402"],
+							},
+						},
 					},
 				});
 
diff --git a/packages/x402/tsdown.config.ts b/packages/x402/tsdown.config.ts
new file mode 100644
index 0000000..174d841
--- /dev/null
+++ b/packages/x402/tsdown.config.ts
@@ -0,0 +1,10 @@
+import { defineConfig } from "tsdown";
+
+export default defineConfig({
+	entry: ["src/index.ts", "src/middleware.ts"],
+	format: ["esm"],
+	dts: true,
+	clean: true,
+	inlineOnly: false,
+	external: ["astro:middleware", "virtual:x402/config"],
+});