Update to use published packages. Update types. Update readme. Fix tests.

src/services/invitation.ts

@@ -2,7 +2,7 @@ import type {
   AcceptInvitationParameters,
   AppendInvitationParameters,
   Engine,
-  FindSuitableResourcesParameters,
+  GetSpendableResourcesParameters,
 } from "@xo-cash/engine";
 import { hasInvitationExpired, mergeInvitationCommits } from "@xo-cash/engine";
 import type {
@@ -483,12 +483,27 @@ export class Invitation extends EventEmitter<InvitationEventMap> {
   }
 
   async findSuitableResources(
-    options: Partial<FindSuitableResourcesParameters> = {},
+    options: Partial<GetSpendableResourcesParameters> = {},
   ): Promise<UnspentOutputData[]> {
+    const templateIdentifier =
+      options.templateIdentifier ?? this.data.templateIdentifier;
+    const template = await this.engine.getTemplate(templateIdentifier);
+    const fallbackOutputIdentifier = Object.keys(template?.outputs ?? {})[0];
+    if (!fallbackOutputIdentifier && !options.outputIdentifier) {
+      throw new Error(
+        `No output identifiers found for template: ${templateIdentifier}`,
+      );
+    }
+
+    const resolvedOptions: GetSpendableResourcesParameters = {
+      templateIdentifier,
+      outputIdentifier: options.outputIdentifier ?? fallbackOutputIdentifier ?? "",
+    };
+
     // Find the suitable resources
-    const { unspentOutputs } = await this.engine.findSuitableResources(
+    const { unspentOutputs } = await this.engine.getSpendableResources(
       this.data,
-      options,
+      resolvedOptions,
     );
 
     // Update the status of the invitation