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This is a fork of node-irc, which is an IRC client library written in TypeScript for Node. This fork is used by the Matrix-IRC application service.

To use this package:

  yarn add matrix-org-irc

Differences from node-irc

The node-irc library isn't well maintained and there are a number of issues which are impacting development of the Matrix-IRC application service. We made the decision to fork the project in order to improve reliability of the application service. A summary of modifications from node-irc@0.3.12 are below:

  • TypeScript support
  • #1 - Manifested as BOTS-80
  • #4 - Manifested as [BOTS-73] (
  • Handle +R -
  • Handle more error codes (430,435,438)
  • Fix bug which would fail to connect conflicting nicks which == NICKLEN.
  • Fix err_unavailresource on connection with reserved nicks.
  • Workaround for the Scunthorpe problem: matrix-org/matrix-appservice-irc#103
  • Add methods for working out if a given text will be split and into how many lines.
  • Add names support (incl. multi-prefix).
  • Add functions to determine if a user prefix is more powerful than another (e.g. @ > &)
  • Case-map all incoming channels correctly (e.g on PRIVMSG and NOTICE)
  • Allow IP family to be chosen to allow IPv6 connections.
  • Add function for getting channel modes.
  • Workaround terrible RFC3484 rules which means that IPv6 DNS rotations would not be honoured.
  • Add setUserMode to set a user's mode.
  • Addition of encodingFallback option which allows setting encoding to use for non-UTF-8 encoded messages.
  • Addition of onNickConflict() option which is called on err_nicknameinuse. This function should return the next nick to try. The function defaults to suffixing monotonically increasing integers. Usage:
    new Client("", "MyNick", {
       onNickConflict: function() {
         return "_MyNick_";


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