fixes wallet/multisig/getIdentity for undefined secrets (#5388)

uses walletDb.getMultisigIdentityByName instead of looking up secret by name

since some identities may not have secrets (i.e., identities created using
Ledger) these identities won't be found when looking identities up using
walletDb.getMultisigSecretByName

ironfish/src/rpc/routes/wallet/multisig/getIdentity.ts

@@ -1,7 +1,6 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
-import { multisig } from '@ironfish/rust-nodejs'
 import * as yup from 'yup'
 import { RpcValidationError } from '../../../adapters/errors'
 import { ApiNamespace } from '../../namespaces'
@@ -36,13 +35,11 @@ routes.register<typeof GetIdentityRequestSchema, GetIdentityResponse>(
 
     const { name } = request.data
 
-    const secret = await context.wallet.walletDb.getMultisigSecretByName(name)
-    if (secret === undefined) {
+    const identity = await context.wallet.walletDb.getMultisigIdentityByName(name)
+    if (identity === undefined) {
       throw new RpcValidationError(`No identity found with name ${name}`, 404)
     }
 
-    const identity = new multisig.ParticipantSecret(secret).toIdentity()
-
-    request.end({ identity: identity.serialize().toString('hex') })
+    request.end({ identity: identity.toString('hex') })
   },
 )