Use correct key for dkg result

Previously, we used the eon from the p2p message as the key to query the
dkg result from the db. However, the msg eon is the keyper config index.
We therefore have to translate into the internal eon value.

Author: jannikluhn

rolling-shutter/keyper/database/keyper.sqlc.gen.go

@@ -169,6 +169,10 @@ WHERE eon = (SELECT eon FROM eons WHERE activation_block_number <= sqlc.arg(bloc
 ORDER BY activation_block_number DESC, height DESC
 LIMIT 1);
 
+-- name: GetDKGResultForKeyperConfigIndex :one
+SELECT * FROM dkg_result
+WHERE eon = (SELECT max(eon) FROM eons WHERE keyper_config_index = $1);
+
 -- name: GetAllDKGResults :many
 SELECT * FROM dkg_result
 ORDER BY eon ASC;

rolling-shutter/keyper/database/sql/queries/keyper.sql

@@ -43,7 +43,7 @@ func (handler *DecryptionKeyHandler) ValidateMessage(ctx context.Context, msg p2
 		return pubsub.ValidationReject, errors.Errorf("eon %d overflows int64", key.Eon)
 	}
 
-	dkgResultDB, err := database.New(handler.dbpool).GetDKGResult(ctx, int64(key.Eon))
+	dkgResultDB, err := database.New(handler.dbpool).GetDKGResultForKeyperConfigIndex(ctx, int64(key.Eon))
 	if err == pgx.ErrNoRows {
 		return pubsub.ValidationReject, errors.Errorf("no DKG result found for eon %d", key.Eon)
 	}

rolling-shutter/keyper/epochkghandler/key.go

@@ -46,7 +46,7 @@ func (handler *DecryptionKeyShareHandler) ValidateMessage(ctx context.Context, m
 		return pubsub.ValidationReject, errors.Errorf("eon %d overflows int64", keyShare.Eon)
 	}
 
-	dkgResultDB, err := database.New(handler.dbpool).GetDKGResult(ctx, int64(keyShare.Eon))
+	dkgResultDB, err := database.New(handler.dbpool).GetDKGResultForKeyperConfigIndex(ctx, int64(keyShare.Eon))
 	if err == pgx.ErrNoRows {
 		return pubsub.ValidationReject, errors.Errorf("no DKG result found for eon %d", keyShare.Eon)
 	}
@@ -122,7 +122,7 @@ func (handler *DecryptionKeyShareHandler) HandleMessage(ctx context.Context, m p
 	}
 
 	// fetch dkg result from db
-	dkgResultDB, err := db.GetDKGResult(ctx, int64(msg.Eon))
+	dkgResultDB, err := db.GetDKGResultForKeyperConfigIndex(ctx, int64(msg.Eon))
 	if err != nil {
 		return nil, errors.Wrapf(err, "failed to get dkg result for eon %d from db", msg.Eon)
 	}