mpc: drop Ringtail identifiers — wire API renamed to Corona

The two MPC files that still carried Ringtail names:
  cmd/mpcd/main.go        — comment ref to luxfi/ringtail
  pkg/api/handlers_kms.go — ValidatorKeySet wire schema

handlers_kms.go renames:
  ValidatorKeySet.RingtailWalletID   → CoronaWalletID
  ValidatorKeySet.RingtailPublicKey  → CoronaPublicKey
  JSON tags ringtailWalletId/PubKey  → coronaWalletId/PubKey
  local `ringtailWalletID` and the per-validator suffix
  "validator-<id>-ringtail"          → "validator-<id>-corona"
  router switch `case "ringtail":`   → `case "corona":`

cmd/mpcd/main.go: comment "luxfi/corona and luxfi/ringtail" was
collapsed to just "luxfi/corona" — the dispatcher's not-yet-impl
stub now references only the live R-LWE library.

Wire break, no compat layer (forwards-perfection policy):
KMS callers must re-issue requests with the new field names.

Build: go build ./... PASS.
Tests: pkg/api PASS 1.374s.

cmd/mpcd/main.go

@@ -785,7 +785,7 @@ func runNodeConsensus(ctx context.Context, c *cli.Command) error {
 	// consumed by teleport/mpc and any other client that speaks the
 	// threshold bus. Pulsar/Corona slots return a typed
 	// "not yet implemented" error pending stable wire encodings in
-	// luxfi/corona and luxfi/ringtail (Red HIGH B2).
+	// luxfi/corona (Red HIGH B2).
 	//
 	// The dispatcher carries zero protocol policy on purpose: profile
 	// gating and audit live on the API surface above. Auth and bind

go.work.sum

@@ -562,6 +562,7 @@ github.com/luxfi/protocol v0.0.2/go.mod h1:Yjn2VRwn5PXim0+JTalAyrVG6YbmuSnYOfeUX
 github.com/luxfi/pubsub v1.0.0/go.mod h1:lCVBPBK/fhD0Ffg57E9R44CEI6Bo1fqb9ISJrBlj4ug=
 github.com/luxfi/qzmq v0.1.4/go.mod h1:PxxnNCYUKvY/lVfPh2q84niDBlOLxkCbfN0h3oSh1+U=
 github.com/luxfi/resource v0.0.1/go.mod h1:wWpZktciYwIi6RNqA+fHwzmPrUJa7PRX7urfwT+spRE=
+github.com/luxfi/ringtail v0.2.0/go.mod h1:SZ+aDLUdfSAtaTRaaYzeDZ5DNQiLaOCelSaIGjL21R0=
 github.com/luxfi/rpc v1.0.0/go.mod h1:dhxzM5rFqNpEOOHB7+8YBQ9d/V4haa6/id9AQTIIJvQ=
 github.com/luxfi/runtime v1.0.0/go.mod h1:lCoz8vCfR4ZU0GNxe0VdHEdq8G0W7rKzQpTnXvew/dM=
 github.com/luxfi/runtime v1.0.1/go.mod h1:2hBKjzbEeE4dzrhUKH8dqkRgLEyiXz6GmuVusy3vJMs=

pkg/api/handlers_kms.go

@@ -14,13 +14,13 @@ import (
 	"github.com/go-chi/chi/v5"
 )
 
-// ValidatorKeySet holds MPC wallet references for a validator's BLS and Ringtail keys.
+// ValidatorKeySet holds MPC wallet references for a validator's BLS and Corona keys.
 type ValidatorKeySet struct {
 	ValidatorID       string    `json:"validatorId"`
 	BLSWalletID       string    `json:"blsWalletId"`
-	RingtailWalletID  string    `json:"ringtailWalletId"`
+	CoronaWalletID  string    `json:"coronaWalletId"`
 	BLSPublicKey      string    `json:"blsPublicKey"`
-	RingtailPublicKey string    `json:"ringtailPublicKey"`
+	CoronaPublicKey string    `json:"coronaPublicKey"`
 	Threshold         int       `json:"threshold"`
 	Parties           int       `json:"parties"`
 	Status            string    `json:"status"`
@@ -100,8 +100,8 @@ func (s *Server) handleKMSGenerate(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	ringtailWalletID := fmt.Sprintf("validator-%s-ringtail", req.ValidatorID)
-	ringtailResult, err := s.mpc.TriggerKeygen(orgID, ringtailWalletID)
+	coronaWalletID := fmt.Sprintf("validator-%s-corona", req.ValidatorID)
+	coronaResult, err := s.mpc.TriggerKeygen(orgID, coronaWalletID)
 	if err != nil {
 		writeError(w, http.StatusInternalServerError, err.Error())
 		return
@@ -111,9 +111,9 @@ func (s *Server) handleKMSGenerate(w http.ResponseWriter, r *http.Request) {
 	ks := &ValidatorKeySet{
 		ValidatorID:       req.ValidatorID,
 		BLSWalletID:       blsResult.WalletID,
-		RingtailWalletID:  ringtailResult.WalletID,
+		CoronaWalletID:  coronaResult.WalletID,
 		BLSPublicKey:      blsResult.ECDSAPubKey,
-		RingtailPublicKey: ringtailResult.EDDSAPubKey,
+		CoronaPublicKey: coronaResult.EDDSAPubKey,
 		Threshold:         req.Threshold,
 		Parties:           req.Parties,
 		Status:            "active",
@@ -188,10 +188,10 @@ func (s *Server) handleKMSSign(w http.ResponseWriter, r *http.Request) {
 	switch req.KeyType {
 	case "bls":
 		walletID = ks.BLSWalletID
-	case "ringtail":
-		walletID = ks.RingtailWalletID
+	case "corona":
+		walletID = ks.CoronaWalletID
 	default:
-		writeError(w, http.StatusBadRequest, "key_type must be 'bls' or 'ringtail'")
+		writeError(w, http.StatusBadRequest, "key_type must be 'bls' or 'corona'")
 		return
 	}
 
@@ -233,8 +233,8 @@ func (s *Server) handleKMSRotate(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusInternalServerError, fmt.Sprintf("bls reshare: %v", err))
 		return
 	}
-	if err := s.mpc.TriggerReshare(orgID, ks.RingtailWalletID, req.NewThreshold, req.NewParticipants); err != nil {
-		writeError(w, http.StatusInternalServerError, fmt.Sprintf("ringtail reshare: %v", err))
+	if err := s.mpc.TriggerReshare(orgID, ks.CoronaWalletID, req.NewThreshold, req.NewParticipants); err != nil {
+		writeError(w, http.StatusInternalServerError, fmt.Sprintf("corona reshare: %v", err))
 		return
 	}