Error Codes and Handling

{
  "error": "insufficient_sol",
  "message": "You do not have enough SOL for this transaction. Add SOL to your wallet and try again.",
  "retryable": false,
  "requiredLamports": "105000000",
  "availableLamports": "98000000"
}

const REAUTH = new Set(["invalid_token", "invalid_grant"]);
const RECONNECT = new Set(["delegation_missing"]);
const MIGRATING = new Set(["migration_pending", "pool_not_open"]);
const TRANSIENT = new Set([
  "rpc_unavailable", "privy_sign_failed", "pinata_unavailable", "internal",
  "oracle_stale", "oracle_unavailable",
  "oracle_confidence_too_wide", "oracle_price_out_of_range",
]);

function handle(err) {
  if (REAUTH.has(err.error)) return refreshThenRetryOnce();
  if (RECONNECT.has(err.error)) return promptReconnect();
  if (MIGRATING.has(err.error)) return retryAfter({ seconds: 5, maxAttempts: 6 });
  if (TRANSIENT.has(err.error)) return retryWithBackoff({ maxAttempts: 4 });

  // Everything else is a real, user-visible outcome.
  return showMessage(err.message);
}