rpc: allow getblocktemplate for test chains when unconnected or in IBD

src/rpc/mining.cpp

@@ -658,11 +658,15 @@ static RPCHelpMan getblocktemplate()
     if(!node.connman)
         throw JSONRPCError(RPC_CLIENT_P2P_DISABLED, "Error: Peer-to-peer functionality missing or disabled");
 
-    if (node.connman->GetNodeCount(CConnman::CONNECTIONS_ALL) == 0)
-        throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, PACKAGE_NAME " is not connected!");
+    if (!Params().IsTestChain()) {
+        if (node.connman->GetNodeCount(CConnman::CONNECTIONS_ALL) == 0) {
+            throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, PACKAGE_NAME " is not connected!");
+        }
 
-    if (::ChainstateActive().IsInitialBlockDownload())
-        throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, PACKAGE_NAME " is in initial sync and waiting for blocks...");
+        if (::ChainstateActive().IsInitialBlockDownload()) {
+            throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, PACKAGE_NAME " is in initial sync and waiting for blocks...");
+        }
+    }
 
     static unsigned int nTransactionsUpdatedLast;
     const CTxMemPool& mempool = EnsureMemPool(request.context);