37 releases (23 breaking)

0.25.0 Dec 18, 2025
0.23.2 Dec 11, 2025
0.23.1 Nov 13, 2025
0.21.0 Jul 15, 2025
0.0.0 Nov 21, 2022

#3 in #substrate-parachain

Download history 4726/week @ 2025-11-04 4806/week @ 2025-11-11 4972/week @ 2025-11-18 3947/week @ 2025-11-25 4067/week @ 2025-12-02 4822/week @ 2025-12-09 5024/week @ 2025-12-16 2226/week @ 2025-12-23 2254/week @ 2025-12-30 3205/week @ 2026-01-06 3119/week @ 2026-01-13 3900/week @ 2026-01-20 3831/week @ 2026-01-27 5626/week @ 2026-02-03 5605/week @ 2026-02-10 5556/week @ 2026-02-17

21,467 downloads per month
Used in 90 crates (38 directly)

Apache-2.0 and GPL-3.0-only

7MB
133K SLoC

cumulus-pallet-parachain-system is a base pallet for Cumulus-based parachains.

This pallet handles low-level details of being a parachain. Its responsibilities include:

  • ingestion of the parachain validation data;
  • ingestion and dispatch of incoming downward and lateral messages;
  • coordinating upgrades with the Relay Chain; and
  • communication of parachain outputs, such as sent messages, signaling an upgrade, etc.

Users must ensure that they register this pallet as an inherent provider.

Dependencies

~32–54MB
~771K SLoC