How to define Workflow return values in TypeScript

To return a value of the Workflow function, use Promise<something>. The Promise is used to make asynchronous calls and comes with guarantees.

The following example uses a Promise<string> to eventually return a name and born parameter.

interface ExampleParam {
  name: string;
  born: number;
}
export async function example({ name, born }: ExampleParam): Promise<string> {
  return `Hello ${name}, you were born in ${born}.`;
}