import { ProviderInterface } from ':core/provider/interface.js';

declare global {
  interface Window {
    ethereum?: InjectedProvider;
  }
}

const TBA_PROVIDER_IDENTIFIER = 'isCoinbaseBrowser';

type InjectedProvider = ProviderInterface & {
  [TBA_PROVIDER_IDENTIFIER]?: boolean;
};

export function getInjectedProvider(): InjectedProvider | null {
  const injectedProvider = window.ethereum ?? window.top?.ethereum;

  if (injectedProvider?.[TBA_PROVIDER_IDENTIFIER]) {
    return injectedProvider;
  }

  return null;
}