#bit-fields #distribution #peer #availability #signed #polkadot #relay

polkadot-availability-bitfield-distribution

Polkadot Bitfiled Distribution subsystem, which gossips signed availability bitfields used to compactly determine which backed candidates are available or not based on a 2/3+ quorum

19 major breaking releases

21.0.0 Jan 29, 2025
20.0.0 Jan 14, 2025
18.0.0 Oct 1, 2024
17.0.0 Jul 19, 2024
0.0.0 Nov 21, 2022

#18 in #availability

Download history 1011/week @ 2024-11-02 706/week @ 2024-11-09 1342/week @ 2024-11-16 1171/week @ 2024-11-23 1100/week @ 2024-11-30 1468/week @ 2024-12-07 1584/week @ 2024-12-14 885/week @ 2024-12-21 980/week @ 2024-12-28 1088/week @ 2025-01-04 1385/week @ 2025-01-11 1102/week @ 2025-01-18 1061/week @ 2025-01-25 1235/week @ 2025-02-01 1296/week @ 2025-02-08 454/week @ 2025-02-15

4,223 downloads per month
Used in 3 crates (2 directly)

GPL-3.0-only

71KB
2K SLoC

Release

Polkadot SDK Stable 2412


lib.rs:

The bitfield distribution

In case this node is a validator, gossips its own signed availability bitfield for a particular relay parent. Independently of that, gossips on received messages from peers to other interested peers.

Dependencies

~94–130MB
~2.5M SLoC