fix: avoid recursive call after rename to (*PeerState).MarshalJSON (celestiaorg#865)

* avoid recursive call after rename to (*PeerState).MarshalJSON

* add test

* add change doc

* explain for nolint

* fix lint

* fix golangci-lint to v1.52.2

* fix golangci-lint to v1.52.2

* Revert "fix golangci-lint to v1.52.2"

This reverts commit 598a9ef4c86fc29cf038251676c33a222217826c.

* Revert "fix golangci-lint to v1.52.2"

This reverts commit a8aad121e27382813e95b1911b1b560c62e1c7c3.

* Reintroduced `cmtjson`

* Avoid copying Mutex

* Avoid copying Mutex -- 2nd try, more succint

* Update .changelog/unreleased/bug-fixes/865-fix-peerstate-marshaljson.md

* Update consensus/reactor_test.go

---------

Co-authored-by: Sergio Mena <[email protected]>

Author: mmsqe

.changelog/unreleased/bug-fixes/865-fix-peerstate-marshaljson.md

@@ -0,0 +1,2 @@
+- `[consensus]` Avoid recursive call after rename to (*PeerState).MarshalJSON
+  ([\#863](https://github.com/cometbft/cometbft/pull/863))

consensus/reactor.go

@@ -1075,7 +1075,8 @@ func (ps *PeerState) MarshalJSON() ([]byte, error) {
 	ps.mtx.Lock()
 	defer ps.mtx.Unlock()
 
-	return cmtjson.Marshal(ps)
+	type jsonPeerState PeerState
+	return cmtjson.Marshal((*jsonPeerState)(ps))
 }
 
 // GetHeight returns an atomic snapshot of the PeerRoundState's height

consensus/reactor_test.go

@@ -24,6 +24,7 @@ import (
 	"github.com/cometbft/cometbft/crypto/tmhash"
 	"github.com/cometbft/cometbft/libs/bits"
 	"github.com/cometbft/cometbft/libs/bytes"
+	"github.com/cometbft/cometbft/libs/json"
 	"github.com/cometbft/cometbft/libs/log"
 	cmtsync "github.com/cometbft/cometbft/libs/sync"
 	mempl "github.com/cometbft/cometbft/mempool"
@@ -1096,3 +1097,32 @@ func TestVoteSetBitsMessageValidateBasic(t *testing.T) {
 		})
 	}
 }
+
+func TestMarshalJSONPeerState(t *testing.T) {
+	ps := NewPeerState(nil)
+	data, err := json.Marshal(ps)
+	require.NoError(t, err)
+	require.JSONEq(t, `{
+		"round_state":{
+			"height": "0",
+			"round": -1,
+			"step": 0,
+			"start_time": "0001-01-01T00:00:00Z",
+			"proposal": false,
+			"proposal_block_part_set_header":
+				{"total":0, "hash":""},
+			"proposal_block_parts": null,
+			"proposal_pol_round": -1,
+			"proposal_pol": null,
+			"prevotes": null,
+			"precommits": null,
+			"last_commit_round": -1,
+			"last_commit": null,
+			"catchup_commit_round": -1,
+			"catchup_commit": null
+		},
+		"stats":{
+			"votes":"0",
+			"block_parts":"0"}
+		}`, string(data))
+}