fix: handle errors from tlink API

Author: micwallace

javascript/tokenscript-viewer/src/components/app/app.tsx

@@ -170,7 +170,11 @@ export class AppRoot {
 								response.data?.uid === data.uid
 							) {
 								window.removeEventListener('message', messageHandler)
-								resolve(response.data)
+								if (response.data?.error){
+									reject(new Error(response.data.error));
+								} else {
+									resolve(response.data);
+								}
 							}
 						}
 

javascript/tokenscript-viewer/src/integration/IframeEthereumProvider.ts

@@ -175,7 +175,7 @@ export class IFrameEthereumProvider implements ethers.Eip1193Provider {
 						   targetOrigin = DEFAULT_TARGET_ORIGIN,
 						   timeoutMilliseconds = DEFAULT_TIMEOUT_MILLISECONDS,
 						   eventSource = window,
-						   eventTarget = window.parent,
+						   eventTarget = window.opener ?? window.parent,
 					   }: IFrameEthereumProviderOptions = {}) {
 		// Call super for `this` to be defined
 		//super();