chore: generate v0 JSON RPC specification (#13155)

* Generate v0 JSON RPC specification

Consistently generate v0 JSON RPC specification, similar to what's
provided for v1 and v2.

Fixes #13153

Author: masih

CHANGELOG.md

@@ -20,6 +20,7 @@
 - feat(spcli): make settle-deal optionally take deal id ranges ([filecoin-project/lotus#13146](https://github.com/filecoin-project/lotus/pull/13146))
 - fix(f3): properly wire up eth v2 APIs for f3 ([filecoin-project/lotus#13149](https://github.com/filecoin-project/lotus/pull/13149))
 - `lotus state active-sectors` now outputs CSV format and supports an optional `--show-partitions` to list active sector deadlines and partitions. ([filecoin-project/lotus#13152](https://github.com/filecoin-project/lotus/pull/13152))
+- chore: generate v0 JSON RPC specification ([filecoin-project/lotus#13155](https://github.com/filecoin-project/lotus/pull/13155))
 
 # Node v1.33.0 / 2025-05-08
 The Lotus v1.33.0 release introduces experimental v2 APIs with F3 awareness, featuring a new TipSet selection mechanism that significantly enhances how applications interact with the Filecoin blockchain. This release candidate also adds F3-aware Ethereum APIs via the /v2 endpoint.  All of the /v2 APIs implement intelligent fallback mechanisms between F3 and Expected Consensus and are exposed through the Lotus Gateway.

api/docgen/docgen.go

@@ -521,6 +521,10 @@ func GetAPIType(name, pkg string) (i interface{}, t reflect.Type, permStruct []r
 			permStruct = append(permStruct, reflect.TypeOf(v0api.FullNodeStruct{}.Internal))
 			permStruct = append(permStruct, reflect.TypeOf(v0api.CommonStruct{}.Internal))
 			permStruct = append(permStruct, reflect.TypeOf(v0api.NetStruct{}.Internal))
+		case "Gateway":
+			i = &v0api.GatewayStruct{}
+			t = reflect.TypeOf(new(struct{ v0api.Gateway })).Elem()
+			permStruct = append(permStruct, reflect.TypeOf(v0api.GatewayStruct{}.Internal))
 		default:
 			panic("unknown type")
 		}