async function reviewCryptoWithdrawal(
  requestId: number,
  approve: boolean,
  denialReason?: string
) {
  try {
    // Step 1: Request 2FA code
    const codeRequest = await client.request(gql`
      mutation {
        sendWithdrawConfirmCode
      }
    `);

    if (!codeRequest.sendWithdrawConfirmCode) {
      throw new Error('Failed to send 2FA code');
    }

    console.log('✅ 2FA code sent to admin phone');

    // Step 2: Get 2FA code from admin
    const twoFactorCode = await promptAdminFor2FACode();

    // Step 3: Confirm withdrawal
    const result = await client.request(gql`
      mutation ConfirmCrypto(
        $id: Int!,
        $status: Int!,
        $deniedReason: String,
        $code: String!
      ) {
        confirmCryptoWithdraw(
          id: $id,
          status: $status,
          deniedReason: $deniedReason,
          code: $code
        )
      }
    `, {
      id: requestId,
      status: approve ? 1 : 2,
      deniedReason: approve ? null : denialReason,
      code: twoFactorCode
    });

    if (approve) {
      console.log('✅ Crypto withdrawal approved');
      // Trigger blockchain transaction
      await processBlockchainWithdrawal(requestId);
    } else {
      console.log('❌ Crypto withdrawal denied');
    }

    return result.confirmCryptoWithdraw;

  } catch (error) {
    console.error('Withdrawal confirmation failed:', error);
    throw error;
  }
}