2026-07-20 Messaging Weekly

Logos Delivery §

Messaging API — Beta §

• [Deliverable] Test suite for Messaging API

  • achieved:
    • Fix interop tests

• [Deliverable] Stabilize and improve Messaging API, fix bugs

  • achieved:
    • Structured API layers
    • feat: logos_delivery_node app + messaging REST API with event observability
    • feat: improve config
    • Move api config modules to api/conf/
    • chore: move conf types to api/conf
    • Fix FFI peerId pretty print

Reliable Channel API — Developer Preview §

• [Deliverable] Implement Reliable Channel API
  • achieved:
    • feat(channels): add channelExists to reliable channels API
  • next:
    • fix(channels): default channels to unencrypted so messages flow
    • E2E testing of LogosDelivery Reliable Channel API

Reliable Channel API — Beta §

• Add Rate Limit Manager to Reliable Channel API
  • achieved:
    • RLN rate-limiting: epoch/nonce misalignment and budget gaps
  • next:
    • Move rate-limit-manager to messaging client layer
    • feat: rate-limit enforcement and RLN proofing at the send service transmission stage
    • feat: enforce per-epoch budget in RateLimitManager.admit
    • Implement Rate limit manager

Support QUIC Transport in Logos Delivery §

• [Deliverable] Trial QUIC
  • next:
    • feat: DST scale validation of QUIC transport

RLN for Edge Nodes §

• [Deliverable] Improve RLN UX by reducing contract interactions
  • achieved:
    • refresh merkle proof cache reactively on msg publish rejection

Port RLN to Logos Blockchain §

• [Deliverable] Implement pluggable RLN membership interface
  • next:
    • define rln interface API
    • Implement proper api folder structure for RLN

Fleet stability §

• [Deliverable] Fleet monitoring dashboards for Logos fleets

  • next:
    • group and simplify sonda metrics
    • fix: bound the error label of failed_store_queries

• [Deliverable] Resolve known fleet stability issues

  • achieved:
    • fix: don’t apply reconnect backoff to discovered relay peers
  • next:
    • Bump nim-libp2p to v2.2.0 and replace nat_traversal with libp2p NATConfig

Logos Chat §

Chat — Developer Preview §

• [Deliverable] Add Group Chat
  • achieved:
    • GroupV2 Client Integration - https://github.com/logos-messaging/libchat/pull/167, https://github.com/logos-co/logos-chat-module/pull/43
    • Remove PrivateV1 Conversation Stack - https://github.com/logos-messaging/libchat/pull/176
    • Surface membership-changes - https://github.com/logos-messaging/libchat/pull/177, https://github.com/logos-co/logos-chat-module/pull/47
    • Isolate & expose chat delivery library - https://github.com/logos-messaging/libchat/pull/178
    • Expose Groupname in Client - https://github.com/logos-messaging/libchat/pull/183, https://github.com/logos-co/logos-chat-module/pull/48

Maintenance §

• achieved:
  • Refactor: replace all Option (std/options) with Opt (results)
  • nim-ffi:
    • feat(ffi): RET_STALE_WARN progress callback replacing handler timeout
    • fix(test): rebuild CBOR libecho in cpp e2e to avoid ABI mismatch
• next:
  • chore: replace minprotobuf with nim-protobuf-serialization
  • standardize the use of Persistence
  • nocopy message path PoC: 1/3 perf harness, 2/3 WakuMessage as ref object, 3/3 WakuEnvelope decode once
  • Lossless event delivery: unbounded intrusive SPSC queue + node freelist
  • chore: improve on RLN merkle proof and root refresh logic
  • Reduce rln tests duration