Remove direct node->wallet calls in init.cpp

Route calls during node initialization and shutdown that would happen between a
node process and wallet processes through the serializable `Chain::Client`
interface, rather than `WalletInitInterface` which is now simpler and only
deals with early initialization and parameter interaction.

This commit mostly does not change behavior. The only change is that the
"Wallet disabled!" and "No wallet support compiled in!" messages are now logged
earlier during startup.

1 files changed, 30 insertions, 7 deletions

diff --git a/src/init.cpp b/src/init.cpp
index 88d4d059f9..3ab97be329 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -19,6 +19,7 @@
 #include <fs.h>
 #include <httpserver.h>
 #include <httprpc.h>
+#include <interfaces/chain.h>
 #include <index/txindex.h>
 #include <key.h>
 #include <validation.h>
@@ -177,7 +178,9 @@ void Shutdown(InitInterfaces& interfaces)
     StopREST();
     StopRPC();
     StopHTTPServer();
-    g_wallet_init_interface.Flush();
+    for (const auto& client : interfaces.chain_clients) {
+        client->flush();
+    }
     StopMapPort();
 
     // Because these depend on each-other, we make sure that neither can be
@@ -240,7 +243,9 @@ void Shutdown(InitInterfaces& interfaces)
         pcoinsdbview.reset();
         pblocktree.reset();
     }
-    g_wallet_init_interface.Stop();
+    for (const auto& client : interfaces.chain_clients) {
+        client->stop();
+    }
 
 #if ENABLE_ZMQ
     if (g_zmq_notification_interface) {
@@ -260,7 +265,7 @@ void Shutdown(InitInterfaces& interfaces)
     UnregisterAllValidationInterfaces();
     GetMainSignals().UnregisterBackgroundSignalScheduler();
     GetMainSignals().UnregisterWithMempoolSignals(mempool);
-    g_wallet_init_interface.Close();
+    interfaces.chain_clients.clear();
     globalVerifyHandle.reset();
     ECC_Stop();
     LogPrintf("%s: done\n", __func__);
@@ -1222,11 +1227,19 @@ bool AppInitMain(InitInterfaces& interfaces)
     GetMainSignals().RegisterBackgroundSignalScheduler(scheduler);
     GetMainSignals().RegisterWithMempoolSignals(mempool);
 
+    // Create client interfaces for wallets that are supposed to be loaded
+    // according to -wallet and -disablewallet options. This only constructs
+    // the interfaces, it doesn't load wallet data. Wallets actually get loaded
+    // when load() and start() interface methods are called below.
+    g_wallet_init_interface.Construct(interfaces);
+
     /* Register RPC commands regardless of -server setting so they will be
      * available in the GUI RPC console even if external calls are disabled.
      */
     RegisterAllCoreRPCCommands(tableRPC);
-    g_wallet_init_interface.RegisterRPC(tableRPC);
+    for (const auto& client : interfaces.chain_clients) {
+        client->registerRpcs();
+    }
     g_rpc_interfaces = &interfaces;
 #if ENABLE_ZMQ
     RegisterZMQRPCCommands(tableRPC);
@@ -1245,7 +1258,11 @@ bool AppInitMain(InitInterfaces& interfaces)
     }
 
     // ********************************************************* Step 5: verify wallet database integrity
-    if (!g_wallet_init_interface.Verify(*interfaces.chain)) return false;
+    for (const auto& client : interfaces.chain_clients) {
+        if (!client->verify()) {
+            return false;
+        }
+    }
 
     // ********************************************************* Step 6: network initialization
     // Note that we absolutely cannot open any actual connections
@@ -1564,7 +1581,11 @@ bool AppInitMain(InitInterfaces& interfaces)
     }
 
     // ********************************************************* Step 9: load wallet
-    if (!g_wallet_init_interface.Open(*interfaces.chain)) return false;
+    for (const auto& client : interfaces.chain_clients) {
+        if (!client->load()) {
+            return false;
+        }
+    }
 
     // ********************************************************* Step 10: data directory maintenance
 
@@ -1710,7 +1731,9 @@ bool AppInitMain(InitInterfaces& interfaces)
     SetRPCWarmupFinished();
     uiInterface.InitMessage(_("Done loading"));
 
-    g_wallet_init_interface.Start(scheduler);
+    for (const auto& client : interfaces.chain_clients) {
+        client->start(scheduler);
+    }
 
     return true;
 }