Errors

How Coinbase failures surface and what to do at each step.

How errors surface

1. Thrown errors — connect(), startWithdrawal(), confirmWithdrawal(), getBalances(), etc. reject with ConnectSdkError (stable code).
2. Events — e.g. coinbase:sessionExpired when the OAuth token dies mid-flow; oauth:error for popup failures.

Branch on code, not on message text:

import {
  ConnectSdkError,
  ConnectSdkErrorCode,
} from '@swapped/connect-sdk';

try {
  await client.coinbase.startWithdrawal({
    /* amount, currency, name, … */
  });
} catch (error) {
  if (!(error instanceof ConnectSdkError)) {
    throw error;
  }

  switch (error.code) {
    case ConnectSdkErrorCode.COINBASE_COOLDOWN_ACTIVE: {
      const { remainingMs } = client.coinbase.getCooldown();
      // Disable start; show countdown
      break;
    }
    case ConnectSdkErrorCode.COINBASE_SESSION_EXPIRED:
    case ConnectSdkErrorCode.COINBASE_NOT_CONNECTED:
      await client.coinbase.connect();
      break;
    case ConnectSdkErrorCode.COINBASE_PASSKEY_NOT_SUPPORTED:
      // SMS / authenticator, not passkey
      break;
    case ConnectSdkErrorCode.COINBASE_INVALID_WITHDRAWAL_AMOUNT:
      // Field error on amount form
      break;
    case ConnectSdkErrorCode.SESSION_NOT_ACTIVE:
      await client.restartSession();
      break;
    default:
      // API_ERROR / unknown — generic retry
      break;
  }
}

client.on('coinbase:sessionExpired', () => {
  // Token died on the form — back to Connect
});

client.on('oauth:error', ({ error }) => {
  // Popup blocked / closed
});

When things fail in the flow

Step	What goes wrong	How you see it	What to do in UI
Connect	Popup blocked or closed early	OAUTH_POPUP_*; also oauth:error	Allow popups; retry connect()
Connect / later	OAuth token expired	COINBASE_SESSION_EXPIRED or coinbase:sessionExpired	Call connect() again
Any withdraw call	Never connected	COINBASE_NOT_CONNECTED	Call connect() first
Amount form	Amount below min / invalid / non-viable above-spendable	Prefer validateWithdrawalAmount for field UX; startWithdrawal auto-adjusts viable above-spendable	Field error or withdrawal callback
Start withdraw	Double-submit / retry too soon	COINBASE_COOLDOWN_ACTIVE	Cooldown UI
Start / confirm	Passkey-only confirm	COINBASE_PASSKEY_NOT_SUPPORTED	SMS / authenticator
Confirm 2FA	Wrong code	Often { status: 'requires2fa' } again	Keep 2FA UI; show feedback; no cooldown
Confirm 2FA	Nothing pending	COINBASE_NO_ACTIVE_WITHDRAWAL	Start again
Start withdraw	Session already completed	SESSION_NOT_ACTIVE	restartSession()

Wrong 2FA is usually not a hard error (returns requires2fa again). Cooldown never blocks confirm. In React, use is2faInvalid from useCoinbaseWithdrawal.

Prevent cooldown and amount errors in the UI:

const { isInCooldown, remainingMs } = client.coinbase.getCooldown();
if (isInCooldown) {
  // disable Start
}

const validation = await client.coinbase.validateWithdrawalAmount({
  amount,
  balance,
  exchangeRate,
  symbol,
  network,
});
if (!validation.ok) {
  // show validation.reason — do not call startWithdrawal
}

Error code reference

Code	When it happens	What to do
OAUTH_POPUP_BLOCKED	Browser blocked login popup	Allow popups; connect() again
OAUTH_POPUP_CLOSED	Popup closed early	Retry connect()
COINBASE_NOT_CONNECTED	No OAuth token	Call connect()
COINBASE_SESSION_EXPIRED	Token invalid	Reconnect; listen for coinbase:sessionExpired
COINBASE_INVALID_WITHDRAWAL_AMOUNT	Below min, invalid, or above spendable with no viable cap	Validate first; see withdrawal auto-adjust
COINBASE_COOLDOWN_ACTIVE	Start during 30s cooldown	Wait; use getCooldown()
COINBASE_PASSKEY_NOT_SUPPORTED	Passkey confirmation required	SMS / authenticator 2FA
COINBASE_NO_ACTIVE_WITHDRAWAL	Confirm with nothing pending	startWithdrawal first
SESSION_NOT_ACTIVE	Session cannot accept a new payment	restartSession()

Unmapped HTTP failures surface as API_ERROR. Show a retry message and keep the user on the same step when safe.