Add RPC operation for resolving well known identity

core/src/main/kotlin/net/corda/core/messaging/CordaRPCOps.kt

@@ -241,6 +241,15 @@ interface CordaRPCOps : RPCOps {
 
     // TODO These need rethinking. Instead of these direct calls we should have a way of replicating a subset of
     // the node's state locally and query that directly.
+    /**
+     * Returns the well known identity from an abstract party. This is intended to resolve the well known identity
+     * from a confidential identity, however it transparently handles returning the well known identity back if
+     * a well known identity is passed in.
+     *
+     * @param party identity to determine well known identity for.
+     * @return well known identity, if found.
+     */
+    fun partyFromAnonymous(party: AbstractParty): Party?
     /**
      * Returns the [Party] corresponding to the given key, if found.
      */

core/src/main/kotlin/net/corda/core/node/services/IdentityService.kt

@@ -109,10 +109,12 @@ interface IdentityService {
     fun partyFromX500Name(principal: X500Name): Party?
 
     /**
-     * Resolve the well known identity of a party. If the party passed in is already a well known identity
-     * (i.e. a [Party]) this returns it as-is.
+     * Returns the well known identity from an abstract party. This is intended to resolve the well known identity
+     * from a confidential identity, however it transparently handles returning the well known identity back if
+     * a well known identity is passed in.
      *
-     * @return the well known identity, or null if unknown.
+     * @param party identity to determine well known identity for.
+     * @return well known identity, if found.
      */
     fun partyFromAnonymous(party: AbstractParty): Party?
 

node/src/main/kotlin/net/corda/node/internal/CordaRPCOpsImpl.kt

@@ -149,6 +149,7 @@ class CordaRPCOpsImpl(
     override fun deauthoriseContractUpgrade(state: StateAndRef<*>) = services.vaultService.deauthoriseContractUpgrade(state)
     override fun currentNodeTime(): Instant = Instant.now(services.clock)
     override fun waitUntilRegisteredWithNetworkMap() = services.networkMapCache.mapServiceRegistered
+    override fun partyFromAnonymous(party: AbstractParty): Party? = services.identityService.partyFromAnonymous(party)
     override fun partyFromKey(key: PublicKey) = services.identityService.partyFromKey(key)
     @Suppress("DEPRECATION")
     @Deprecated("Use partyFromX500Name instead")