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docs.waku.org/static/dns_discovery.md
fryorcraken.eth 5ee72ee8bf
add diagrams to explain discovery
2023-06-09 10:21:42 +10:00

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sequenceDiagram
    Waku Node->>DNS Server: (1) Lookup TXT example.com
    DNS Server-->>Waku Node: (2) enrtree-root:v1 e=U3...3Y ...
    Waku Node->>DNS Server: (3) Lookup TXT U3...3Y.example.com
    DNS Server-->>Waku Node: (4) enrtree-branch:DU...VQ,J3..HU,IC...WE
    Waku Node->> DNS Server: (5) Lookup TXT DU...VQ.example.com
    DNS Server-->>Waku Node: (6) enr:-M-4QLdAB-Kyz...Wt1Mg8
    Waku Node ->> Waku Node: (7) Decode ENR: Peer's connection details
  1. DNS lookup query to retrieve TXT data stored on example.com domain.
  2. entree-root is returned, value of e is the enr-root, root hash of the node subtree.
  3. DNS lookup query to retrieve TXT data stored on <enr-root>.example.com domain.
  4. entree-branch is returned, this tree contains hashes of node subtrees.
  5. DNS lookup query to retrieve TXT data stored on, DU...VQ.example.com domain, the first leaf of entree-branch.
  6. enr record is returned.
  7. Returned value is decoded, peer connection details such as ip address and port are learned.