// Races a promise against a timeout. Used to guard wallet interactions
// (signTypedData / switchChain) which can hang forever on mobile WalletConnect
// when the wallet app does not surface to confirm the request.

export class TimeoutError extends Error {
  constructor(message: string) {
    super(message);
    this.name = 'TimeoutError';
  }
}

export function withTimeout<T>(promise: Promise<T>, ms: number, message: string): Promise<T> {
  let timer: ReturnType<typeof setTimeout>;
  const timeout = new Promise<never>((_, reject) => {
    timer = setTimeout(() => reject(new TimeoutError(message)), ms);
  });
  return Promise.race([promise, timeout]).finally(() => clearTimeout(timer));
}