network update

Author: coot

blog/2025-01-20-network.md

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+---
+title: Network Team Update
+slug: 2025-01-20-network
+authors: coot
+tags: [network]
+hide_table_of_contents: false
+---
+
+## Overview of [sprint 78][sprint-78] & [sprint 79][sprint-79]
+
+### Documentation 
+
+We reviewed the [technical report][network-spec], we closed a number of issues:
+
+* [__RollBack claimed to sometimes contain a header__][on#4686]
+* [__Is BlockFetch mini-protocol inclusive in the argument range?__][on#4628]
+* [__Wrong colors in figure 3.7 of network-spec__][on#4662]
+* [__Document CBOR encoding of Local TX-Submission mini-protocol__][on#4521]
+* [__Document Local Tx-Monitor mini-protocol__][on#3420]
+* [__Links to implemented mini-protocols are obsolete__][on#2780]
+
+This was done in the [Network Spec Update][on#5036] PR, we also fixed many grammar
+& spelling errors [network-spec: language][on#5044].
+
+### SRV Record Support
+
+We worked on [SRV records][SRV-rec] support by `ouroboros-network`, [issue
+#2780][on#2780], [PR 5018][on#5018].  We will merge it after [reuasble
+diffusion][on#5016].
+
+### Quarable Network State
+
+We opened a [draft PR][on#5046], also see the [issue][on#5006], where we
+mentioned all the branches where the work is progressing. See below for more
+technical details.
+
+### Extensible Ouroboros Network Diffusion Stack
+
+The work stream reached the review phase.  See [issue#5016][on#5016].
+
+### Tx-Submission
+
+The Consensus team agreed to implement needed mempool performance
+optimisations and is making progress on them. See
+[ouroboros-consensus#1359][oc#1359].
+
+### Ouroboros-Network-0.19 Release
+
+We cut `ouroboros-network-0.19` and `0.19.1` [releases][on-releases].
+
+## Low-level summary
+
+### Quarable Network State
+
+In the first interaction, we will make it possible to query the `node-to-node` state
+through `LocalStateQuery` mini-protocol (part of the node-to-client protocol).
+
+```haskell
+data ConnectionManagerState peeraddr = ConnectionManagerState {
+    connectionMap                 :: Map (ConnectionId peeraddr) AbstractState,
+    -- ^ map of connections, without outbound connections in
+    -- `ReservedOutboundSt` state.
+
+    registeredOutboundConnections :: Set peeraddr
+    -- ^ set of outbound connections in the `ReserverdOutboundSt` state.
+  }
+  deriving (Eq, Show)
+
+
+data InboundState peeraddr = InboundState {
+    remoteHotSet  :: !(Set (ConnectionId peeraddr)),
+    remoteWarmSet :: !(Set (ConnectionId peeraddr)),
+    remoteColdSet :: !(Set (ConnectionId peeraddr)),
+    remoteIdleSet :: !(Set (ConnectionId peeraddr))
+  }
+  deriving (Eq, Show)
+
+data OutboundState peeraddr = OutboundState {
+    coldPeers :: Set peeraddr,
+    warmPeers :: Set peeraddr,
+    hotPeers  :: Set peeraddr
+  }
+  deriving (Eq, Show)
+
+
+data NetworkState peeraddr = NetworkState {
+    connectionManagerState :: ConnectionManagerState peeraddr,
+    inboundGovernorState   :: InboundState peeraddr,
+    outboundGovernorState  :: OutboundState peeraddr
+  }
+  deriving (Eq, Show)
+```
+
+[sprint-78]: https://github.com/orgs/IntersectMBO/projects/5/views/1?filterQuery=sprint%3A%22Sprint+78%22
+[sprint-79]: https://github.com/orgs/IntersectMBO/projects/5/views/1?filterQuery=sprint%3A%22Sprint+79%22
+
+[network-spec]: https://ouroboros-network.cardano.intersectmbo.org/pdfs/network-spec/network-spec.pdf
+
+[SRV-rec]: https://www.cloudflare.com/en-gb/learning/dns/dns-records/dns-srv-record/
+[oc#1359]: https://github.com/IntersectMBO/ouroboros-consensus/issues/1359
+[on#2780]: https://github.com/IntersectMBO/ouroboros-network/issues/2780
+[on#2883]: https://github.com/IntersectMBO/ouroboros-network/issues/2883
+[on#3420]: https://github.com/IntersectMBO/ouroboros-network/issues/3420
+[on#4521]: https://github.com/IntersectMBO/ouroboros-network/issues/4521
+[on#4628]: https://github.com/IntersectMBO/ouroboros-network/issues/4628
+[on#4662]: https://github.com/IntersectMBO/ouroboros-network/issues/4662
+[on#4686]: https://github.com/IntersectMBO/ouroboros-network/issues/4686
+[on#5006]: https://github.com/IntersectMBO/ouroboros-network/issues/5006
+[on#5016]: https://github.com/IntersectMBO/ouroboros-network/pull/5016
+[on#5018]: https://github.com/IntersectMBO/ouroboros-network/pull/5018
+[on#5033]: https://github.com/IntersectMBO/ouroboros-network/pull/5033
+[on#5036]: https://github.com/IntersectMBO/ouroboros-network/pull/5036
+[on#5044]: https://github.com/IntersectMBO/ouroboros-network/pull/5044
+[on#5046]: https://github.com/IntersectMBO/ouroboros-network/pull/5046
+[on-releases]: https://github.com/orgs/IntersectMBO/projects/5/views/18