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· 2 min read
Marcin Szamotulski

High-level overview of sprint 70​

Cardano CLI​

cardano-cli ping command cannot send pings over unix sockets using node-to-client mini-protocol (since it doesn't support it). In that case, the command will now show a user-friendly error message. See cardano-cli#49.

Mithril​

We held a session with the mithril team to discuss design & implementation of Mithril using ouroboros-network.

Ouroboros-Network​

TxSubmission Logic​

We continued working on tx-submission logic. We developed new tests that run several simulated outbound peers offering transactions and a single inbound peer governed by the new tx-submission logic. Ref ouroboros-network#3311.

The next step is to clean the branch and integrate it with ouroboros-consensensus & cardano-node for early e2e tests.

Bulk-Sync for Genesis​

We reviewed the new bulk-sync application for Genesis mode, see ouroboros-network#4919.

Typed-Protocols​

We reviewed the new typed-protocols API PR. It was recently merged & published to CHaP. Once Haskell.Nix has better support for public sub-libraries, we will package all the libraries in one package and publish it on Hackage. Ref: typed-protocols#52.

The next step is to update, review the integration PR in ouroboros-network, see ouroboros-network#4935.

Nightly Tests​

We fixed a long-due failure on a nightly test. The failure was due to IOSimPOR ability to reorder simulated IO actions, resulting in a wrong order of events. So, it's not a bug in the production code but in the test itself. See ouroboros-network#4948.

Updated readme file​

We updated the dependency graph in our README.md file.

Next Sprint​

sprint-71

· One min read
Marcin Szamotulski

High-level overview of sprint 69​

Ouroboros-Network-0.17.1.x​

We released ouroboros-network-0.17.1.{0,1} which is being integrated with cardano-node-9.2, see releases.

Tx-Submission​

We continued working on tests of the new tx-submission application, ouroboros-network#3311, ouroboros-network#4928.

Typed Protocols​

The new typed-protocols API is under review, typed-protocols#52

IOSim​

We released a new version of io-classes & io-sim to Hackage:

· 2 min read
Marcin Szamotulski

High-level overview of sprint 68​

Peer Sharing​

Karl Knutsson (CF) produces graphs which show how peer sharing usage expands on mainnet.

Peer Sharing: discovered unique peersPeer Sharing: discovered unique peers

Private relays in the last graph are relays which we are not certain that are registered on the chain.

Typed Protocols​

We conducted an investigation whether the new proposed typed-protocols version (see typed-protocols#52 introduces any performance regression. No regression was found when running a cardano-node (v9.1.0 vs a modified version using the new typed-protocols API) the benchmarking cluster. Also no regression was observed when syncing mainnet. The graph below shows accumulated size of block downloaded over time for both nodes:

Accumulated block size over time

The following draft PRs are openned:

cardano-cli ping​

Fixed a bug in which cardano-cli ping exited with wrong exit code when a wrong network magic was supplied, see ouroboros-network#4865.

cardano-cli ping will also now report the remote IP address and port when querying the tip:

> cardano-cli ping -h backbone.mainnet.cardanofoundation.org -p3001 -t -j -q | jq
{
  "tip": [
    {
      "addr": "2a01:2a8:a23d:16::17",
      "blockNo": 10699400,
      "hash": "f37649c4a6ae0c8b208da7c46d4e04312518969e612af0a8dbfdadcbd7180dd2",
      "port": 3001,
      "rtt": 0.013192945,
      "slotNo": 131991843
    },
    {
      "addr": "2a0e:dc0:3:b122::1",
      "blockNo": 10699400,
      "hash": "f37649c4a6ae0c8b208da7c46d4e04312518969e612af0a8dbfdadcbd7180dd2",
      "port": 3001,
      "rtt": 0.024089979,
      "slotNo": 131991843
    },
    {
      "addr": "2001:15e8:110:4aae::1",
      "blockNo": 10699400,
      "hash": "f37649c4a6ae0c8b208da7c46d4e04312518969e612af0a8dbfdadcbd7180dd2",
      "port": 3001,
      "rtt": 0.034663209,
      "slotNo": 131991843
    }
 ]
}

See ouroboros-network#4931.

Tx-Submission​

We continued writing tests for the new tx-submission application.

We started extending typed-protocols codec to have access to both raw bytes and decoded transactions in the tx-submission mini-protocol. See ouroboros-network#4934.

· 2 min read
Marcin Szamotulski

High-level overview of sprint 66​

We held The Network Working Group (NWG) in the last sprint. Below, we share recordings of this and earlier NWG meetings, which introduce basic notions of ouroboros-network. These recordings should be accessible to a technical audience.

Introduction to Ouroboros Network, NWG, part 1​

Introduction to Ouroboros Network, NWG, part 2​

Tx-Submission​

We continued working on the new design of tx-submission. We progressed in writing a new tx-submission server (inbound side of tx-submission protocol) instrumented by decision logic. The next step is writing a simulation that runs N-pairs of client-server communications in which the same decision logic governs all servers - emulating the behaviour of cardano-node once the new tx-submission is integrated. For more details, see ouroboros-network#3311

Genesis integration​

All outstanding PRs related to Genesis have been reviewed and accepted. Soon they will be merged.

Mithril Integration​

We presented ideas on how to run mithril functionalities with cardano-node while taking into account the risks that such integration would impose on the system. The technical description will be part of a CIP, which will then go to the Technical Steering Committee (TSC) for an evaluation.

Smaller tasks​

Open-Source contributions​

We found out and fixed a bug in the iproute parser of IPv4 addresses:

  • Check that IPv4 addresses terminate, iproute#63
  • IPv4 address with mask should not contain a white space, iproute#64

· 2 min read
Marcin Szamotulski

High-level overview of sprint 65​

Karl Knutsson (CF) fixed a bug which prevented a node using bootstrap peers to sync using them, for a more detailed description see ouroboros-network#4899.

Earlier this year we fixed bugs in IOSimPOR which prevent us from using it in ouroboros-network (io-sim#153, io-sim#159); since ouroboros-network#4872 was merged we have a large number of tests that are using IOSimPOR's schedule exploration. In the last sprint we fixed some bugs discovered by IOSimPOR in ouroboros-network:

We continued working on new tx-submission logic: ouroboros-network#3311 as well as on Genesis. The work on Genesis is split in a few PRs which are currently in review process:

High-level overview of sprint 64​

Karl Knutsson (CF) modified peer sharing behaviour to not share peers whith which connections failed, see ouroboros-network#4883 for more details.

We fixed inbound governor counters tracer, see ouroboros-network#4885.