refactor: Move wallet methods out of chain.h and node.h

Add WalletClient interface so node interface is cleaner and don't need
wallet-specific methods.

The new NodeContext::wallet_client pointer will also be needed to eliminate
global wallet variables like ::vpwallets, because createWallet(), loadWallet(),
getWallets(), etc methods called by the GUI need a way to get a reference to
the list of open wallets if it is no longer a global variable.

Also tweaks splash screen registration for load wallet events to be delayed
until after wallet client is created.

7 files changed, 16 insertions, 17 deletions

diff --git a/src/wallet/init.cpp b/src/wallet/init.cpp
index bf05ef844a..1456e1595e 100644
--- a/src/wallet/init.cpp
+++ b/src/wallet/init.cpp
@@ -5,6 +5,7 @@
 
 #include <init.h>
 #include <interfaces/chain.h>
+#include <interfaces/wallet.h>
 #include <net.h>
 #include <node/context.h>
 #include <node/ui_interface.h>
@@ -129,5 +130,7 @@ void WalletInit::Construct(NodeContext& node) const
             settings.rw_settings["wallet"] = wallets;
         });
     }
-    node.chain_clients.emplace_back(interfaces::MakeWalletClient(*node.chain, args, args.GetArgs("-wallet")));
+    auto wallet_client = interfaces::MakeWalletClient(*node.chain, args, args.GetArgs("-wallet"));
+    node.wallet_client = wallet_client.get();
+    node.chain_clients.emplace_back(std::move(wallet_client));
 }
diff --git a/src/wallet/test/init_test_fixture.cpp b/src/wallet/test/init_test_fixture.cpp
index 35bd965673..c23dea1338 100644
--- a/src/wallet/test/init_test_fixture.cpp
+++ b/src/wallet/test/init_test_fixture.cpp
@@ -10,7 +10,7 @@
 
 InitWalletDirTestingSetup::InitWalletDirTestingSetup(const std::string& chainName) : BasicTestingSetup(chainName)
 {
-    m_chain_client = MakeWalletClient(*m_chain, *Assert(m_node.args), {});
+    m_wallet_client = MakeWalletClient(*m_chain, *Assert(m_node.args), {});
 
     std::string sep;
     sep += fs::path::preferred_separator;
diff --git a/src/wallet/test/init_test_fixture.h b/src/wallet/test/init_test_fixture.h
index c95b4f1f6e..f5bade77df 100644
--- a/src/wallet/test/init_test_fixture.h
+++ b/src/wallet/test/init_test_fixture.h
@@ -6,6 +6,7 @@
 #define BITCOIN_WALLET_TEST_INIT_TEST_FIXTURE_H
 
 #include <interfaces/chain.h>
+#include <interfaces/wallet.h>
 #include <node/context.h>
 #include <test/util/setup_common.h>
 
@@ -19,7 +20,7 @@ struct InitWalletDirTestingSetup: public BasicTestingSetup {
     fs::path m_cwd;
     std::map<std::string, fs::path> m_walletdir_path_cases;
     std::unique_ptr<interfaces::Chain> m_chain = interfaces::MakeChain(m_node);
-    std::unique_ptr<interfaces::ChainClient> m_chain_client;
+    std::unique_ptr<interfaces::WalletClient> m_wallet_client;
 };
 
 #endif // BITCOIN_WALLET_TEST_INIT_TEST_FIXTURE_H
diff --git a/src/wallet/test/init_tests.cpp b/src/wallet/test/init_tests.cpp
index c228e06009..9b905569fc 100644
--- a/src/wallet/test/init_tests.cpp
+++ b/src/wallet/test/init_tests.cpp
@@ -15,7 +15,7 @@ BOOST_FIXTURE_TEST_SUITE(init_tests, InitWalletDirTestingSetup)
 BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_default)
 {
     SetWalletDir(m_walletdir_path_cases["default"]);
-    bool result = m_chain_client->verify();
+    bool result = m_wallet_client->verify();
     BOOST_CHECK(result == true);
     fs::path walletdir = gArgs.GetArg("-walletdir", "");
     fs::path expected_path = fs::canonical(m_walletdir_path_cases["default"]);
@@ -25,7 +25,7 @@ BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_default)
 BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_custom)
 {
     SetWalletDir(m_walletdir_path_cases["custom"]);
-    bool result = m_chain_client->verify();
+    bool result = m_wallet_client->verify();
     BOOST_CHECK(result == true);
     fs::path walletdir = gArgs.GetArg("-walletdir", "");
     fs::path expected_path = fs::canonical(m_walletdir_path_cases["custom"]);
@@ -37,7 +37,7 @@ BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_does_not_exist)
     SetWalletDir(m_walletdir_path_cases["nonexistent"]);
     {
         ASSERT_DEBUG_LOG("does not exist");
-        bool result = m_chain_client->verify();
+        bool result = m_wallet_client->verify();
         BOOST_CHECK(result == false);
     }
 }
@@ -47,7 +47,7 @@ BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_is_not_directory)
     SetWalletDir(m_walletdir_path_cases["file"]);
     {
         ASSERT_DEBUG_LOG("is not a directory");
-        bool result = m_chain_client->verify();
+        bool result = m_wallet_client->verify();
         BOOST_CHECK(result == false);
     }
 }
@@ -57,7 +57,7 @@ BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_is_not_relative)
     SetWalletDir(m_walletdir_path_cases["relative"]);
     {
         ASSERT_DEBUG_LOG("is a relative path");
-        bool result = m_chain_client->verify();
+        bool result = m_wallet_client->verify();
         BOOST_CHECK(result == false);
     }
 }
@@ -65,7 +65,7 @@ BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_is_not_relative)
 BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_no_trailing)
 {
     SetWalletDir(m_walletdir_path_cases["trailing"]);
-    bool result = m_chain_client->verify();
+    bool result = m_wallet_client->verify();
     BOOST_CHECK(result == true);
     fs::path walletdir = gArgs.GetArg("-walletdir", "");
     fs::path expected_path = fs::canonical(m_walletdir_path_cases["default"]);
@@ -75,7 +75,7 @@ BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_no_trailing)
 BOOST_AUTO_TEST_CASE(walletinit_verify_walletdir_no_trailing2)
 {
     SetWalletDir(m_walletdir_path_cases["trailing2"]);
-    bool result = m_chain_client->verify();
+    bool result = m_wallet_client->verify();
     BOOST_CHECK(result == true);
     fs::path walletdir = gArgs.GetArg("-walletdir", "");
     fs::path expected_path = fs::canonical(m_walletdir_path_cases["default"]);
diff --git a/src/wallet/test/wallet_test_fixture.cpp b/src/wallet/test/wallet_test_fixture.cpp
index 44f9eb5ddd..9241470745 100644
--- a/src/wallet/test/wallet_test_fixture.cpp
+++ b/src/wallet/test/wallet_test_fixture.cpp
@@ -11,5 +11,5 @@ WalletTestingSetup::WalletTestingSetup(const std::string& chainName)
     bool fFirstRun;
     m_wallet.LoadWallet(fFirstRun);
     m_chain_notifications_handler = m_chain->handleNotifications({ &m_wallet, [](CWallet*) {} });
-    m_chain_client->registerRpcs();
+    m_wallet_client->registerRpcs();
 }
diff --git a/src/wallet/test/wallet_test_fixture.h b/src/wallet/test/wallet_test_fixture.h
index 99d7cfe921..12ad13b49b 100644
--- a/src/wallet/test/wallet_test_fixture.h
+++ b/src/wallet/test/wallet_test_fixture.h
@@ -21,7 +21,7 @@ struct WalletTestingSetup : public TestingSetup {
     explicit WalletTestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
 
     std::unique_ptr<interfaces::Chain> m_chain = interfaces::MakeChain(m_node);
-    std::unique_ptr<interfaces::ChainClient> m_chain_client = interfaces::MakeWalletClient(*m_chain, *Assert(m_node.args), {});
+    std::unique_ptr<interfaces::WalletClient> m_wallet_client = interfaces::MakeWalletClient(*m_chain, *Assert(m_node.args), {});
     CWallet m_wallet;
     std::unique_ptr<interfaces::Handler> m_chain_notifications_handler;
 };
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index fa00d12551..3a03fa08ed 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -183,11 +183,6 @@ std::shared_ptr<CWallet> LoadWallet(interfaces::Chain& chain, const WalletLocati
     return wallet;
 }
 
-std::shared_ptr<CWallet> LoadWallet(interfaces::Chain& chain, const std::string& name, bilingual_str& error, std::vector<bilingual_str>& warnings)
-{
-    return LoadWallet(chain, WalletLocation(name), error, warnings);
-}
-
 WalletCreationStatus CreateWallet(interfaces::Chain& chain, const SecureString& passphrase, uint64_t wallet_creation_flags, const std::string& name, bilingual_str& error, std::vector<bilingual_str>& warnings, std::shared_ptr<CWallet>& result)
 {
     // Indicate that the wallet is actually supposed to be blank and not just blank to make it encrypted