Add illustrative example of using requestedContextParameters property…

… on ConditionContext.
nucypher · Aug 19, 2024 · 1e528aa · 1e528aa
1 parent 99732a9
commit 1e528aa
Showing 1 changed file with 13 additions and 6 deletions.
diff --git a/examples/taco/nodejs/src/index.ts b/examples/taco/nodejs/src/index.ts
@@ -109,14 +109,21 @@ const decryptFromBytes = async (encryptedBytes: Uint8Array) => {
     domain: 'localhost',
     uri: 'http://localhost:3000',
   };
-  const authProvider = new EIP4361AuthProvider(
-    provider,
-    consumerSigner,
-    siweParams,
-  );
   const conditionContext =
     conditions.context.ConditionContext.fromMessageKit(messageKit);
-  conditionContext.addAuthProvider(USER_ADDRESS_PARAM_DEFAULT, authProvider);
+
+  // illustrative optional example of checking what context parameters are required
+  // unnecessary if you already know what the condition contains
+  if (
+    conditionContext.requestedContextParameters.has(USER_ADDRESS_PARAM_DEFAULT)
+  ) {
+    const authProvider = new EIP4361AuthProvider(
+      provider,
+      consumerSigner,
+      siweParams,
+    );
+    conditionContext.addAuthProvider(USER_ADDRESS_PARAM_DEFAULT, authProvider);
+  }
   return decrypt(provider, domain, messageKit, conditionContext);
 };