ipip-0351: final editorial fixes

Author: lidel

src/ipips/ipip-0351.md

@@ -6,6 +6,9 @@ editors:
   - name: Henrique Dias
     github: hacdias
     url: https://hacdias.com/
+  - name: Marcin Rataj
+    github: lidel
+    url: https://lidel.org/
 relatedIssues:
   - https://github.com/ipfs/specs/issues/320
   - https://github.com/ipfs/specs/pull/351
@@ -33,15 +36,29 @@ under the `/ipns` namespace.
 
 In this IPIP, we propose adding :cite[ipns-record] as a response
 format to the gateway under the `/ipns` namespace, allowing for trustless
-retrieval of IPNS records.
+retrieval of IPNS records over HTTP as [application/vnd.ipfs.ipns-record](https://www.iana.org/assignments/media-types/application/vnd.ipfs.ipns-record) content type (multicodec `0x0300`).
 
 ## Detailed design
 
-The solution is to allow the Gateway to provide an IPNS signed record by
-requesting it using either the `Accept` HTTP header or the `format` URL query.
+- :cite[trustless-gateway] can now provide a signed IPNS record upon request for `/ipns/{ipns-name}` path.
+- To request the IPNS record, use one of the following methods:
+  - Include the `Accept: application/vnd.ipfs.ipns-record` HTTP header in the request.
+  - Include the `format=ipns-record` query parameter in the request URL.
+- The HTTP response containing the verifiable IPNS record will have the following format:
+  - Header: `Content-Type: application/vnd.ipfs.ipns-record`
+  - Body: :cite[ipns-record] serialized as the `IpnsEntry` protobuf.
 
 ## Test fixtures
 
+This IPIP got ratified before
+[gateway-conformance](https://github.com/ipfs/gateway-conformance) existed.
+
+
+The [reference implementation in Kubo 0.19](https://github.com/ipfs/kubo/blob/master/docs/changelogs/v0.19.md#signed-ipns-record-response-format)
+provides reusable [assertions](https://github.com/ipfs/kubo/blob/v0.19.2/test/sharness/t0124-gateway-ipns-record.sh).
+
+:::issue
+Until vendor-agnostic fixtures are added to the conformance test suite ([tracking issue](https://github.com/ipfs/gateway-conformance/issues/3)),
 IPNS records for testing can be generated in Kubo by creating an IPNS record:
 
 ```bash
@@ -53,6 +70,7 @@ Published to k51Key: /ipfs/bafyHash
 
 $ ipfs routing get /ipns/k51Key > key.pb
 ```
+:::
 
 ## Design rationale