Use released castle/castle-php ^4.0

README.md

@@ -51,12 +51,11 @@ Install the PHP dependencies, including the Castle PHP SDK:
 composer install
 ```
 
-> **Note:** until the SDK 4.0 release lands on Packagist, `composer.json` pulls
-> `castle/castle-php` from the `feat/php-namespaces` branch via a VCS repository.
-> If Composer hits a GitHub API rate limit while resolving it, add a token:
+> **Note:** `composer.json` requires the released `castle/castle-php` `^4.0`,
+> resolved from the SDK's Git tags via a VCS repository. Once `4.0` is available
+> on Packagist, the `repositories` block can be dropped. If Composer hits a
+> GitHub API rate limit while resolving it, add a token:
 > `composer config --global github-oauth.github.com <token>` (or `gh auth token`).
-> After the SDK is released, switch the requirement to a tagged version
-> (e.g. `"castle/castle-php": "^4.0"`) and drop the `repositories` block.
 
 The Castle browser SDK is served at runtime straight from `node_modules`, so
 install the npm dependencies too:

composer.json

@@ -16,7 +16,7 @@
     "php": ">=7.4",
     "ext-curl": "*",
     "ext-json": "*",
-    "castle/castle-php": "dev-feat/php-namespaces"
+    "castle/castle-php": "^4.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^9.6"

src/helpers.php

@@ -61,11 +61,9 @@ function castle_configure(): void
 {
     Castle::setApiKey(env('castle_api_secret'));
 
-    // Set connection / request timeouts (milliseconds).
-    Castle::setCurlOpts([
-        CURLOPT_CONNECTTIMEOUT_MS => 3000,
-        CURLOPT_TIMEOUT_MS => 5000,
-    ]);
+    // Set the request timeout in milliseconds (applies to both the connection
+    // and the transfer).
+    Castle::setRequestTimeout(5000);
 }
 
 // ---------------------------------------------------------------------------