TypeScript retry async helper

retry.ts

async retryAsync<T>(fn: () => Promise<T>, retryCount: number = 3, retryInterval: number = 1000): Promise<T> {
    let retries = -1;
    do {
        try {
            retries++;
            return await fn();
        } catch (error) {
            if (retries === retryCount) {
                throw error;
            }
            await new Promise<void>((resolve: () => void) => setTimeout(resolve, retryInterval));
        }
    } while (retries < retryCount);
    return fn(); // unreachable code.
}