Errors

import { DiscordRESTError } from 'athena';
 
try {
  await client.createMessage(channelID, '...');
} catch (err) {
  if (err instanceof DiscordRESTError) {
    console.error(err.code, err.message); // e.g. 50001 Missing Access
  }
}

import { CommandError } from 'athena';
 
client.on('commandError', (command, interaction, error) => {
  switch (error.type) {
    case CommandError.NotDeveloperGuild: break;           // error.data: guild ID
    case CommandError.DeniedUser: break;                  // error.data: user ID
    case CommandError.DeniedGuild: break;                 // error.data: guild ID
    case CommandError.MissingPermission: break;           // error.data: { userID, permissions }
    case CommandError.OnCooldown: break;                  // error.data: { userID, cooldown }
    case CommandError.MiddlewareError: break;             // error.data: the thrown value
    case CommandError.UncaughtError: break;               // error.data: Error; error.interaction: which handler
  }
});

client.on('commandError', async (command, interaction, error) => {
  try {
    if (error.type === CommandError.OnCooldown) {
      const secs = Math.max(0, Math.ceil(((error.data.cooldown.expiry ?? 0) - Date.now()) / 1000));
      return await interaction.createMessage({ content: `On cooldown for ${secs}s.`, flags: MessageFlags.Ephemeral });
    }
    if (error.type === CommandError.MissingPermission) {
      return await interaction.createMessage({ content: `You need: ${error.data.permissions.join(', ')}`, flags: MessageFlags.Ephemeral });
    }
    if (error.type === CommandError.UncaughtError) {
      logger.error({ command, err: error.data });
      return await interaction.createMessage({ content: 'Something went wrong.', flags: MessageFlags.Ephemeral });
    }
  } catch {
    // the interaction may already be answered; ignore follow-up failures
  }
});