Merge #10767: [wallet] Clarify wallet initialization / destruction interface

5d2a3995e [trivial] fixup comment for VerifyWallets() (John Newbery)
43b0e81d0 [wallet] Add StartWallets() function to wallet/init.cpp (John Newbery)
290f3c56d [wallet] Add RegisterWalletRPC() function to wallet/init.cpp (John Newbery)
062d63102 [wallet] Add CloseWallets() function to wallet/init.cpp (John Newbery)
77fe07c15 [wallet] Add StopWallets() function to wallet/init.cpp (John Newbery)
2da5eafa4 [wallet] Add FlushWallets() function to wallet/init.cpp (John Newbery)
1b9cee66e [wallet] Rename WalletVerify() to VerifyWallets() (John Newbery)
9c76ba18c [wallet] Rename InitLoadWallet() to OpenWallets() (John Newbery)

Pull request description:

  Apologies for the mostly code move only PR. This is a pre-req for both #10740 and #10762

  All wallet component initialization/destruction functions are now in their own `wallet/init.cpp` translation unit and are no longer static functions on the CWallet class. The bitcoin_server also no longer has any knowledge that there are multiple wallets in vpwallet.

  There should be no changes in behavior from this PR.

Tree-SHA512: 7c260eb094f2fa1a88d803769ba60935810968a7309f731135e4b17623b97f18c03bbcd293c942093d1efce62c6c978f9ff484d54dc9a60bc2fcb5af2d160fcd

4 files changed, 59 insertions, 8 deletions

diff --git a/src/wallet/init.cpp b/src/wallet/init.cpp
index 18365b1b72..1e00735ed9 100644
--- a/src/wallet/init.cpp
+++ b/src/wallet/init.cpp
@@ -10,6 +10,7 @@
 #include "utilmoneystr.h"
 #include "validation.h"
 #include "wallet/wallet.h"
+#include "wallet/rpcwallet.h"
 
 std::string GetWalletHelpString(bool showDebug)
 {
@@ -171,7 +172,14 @@ bool WalletParameterInteraction()
     return true;
 }
 
-bool WalletVerify()
+void RegisterWalletRPC(CRPCTable &t)
+{
+    if (gArgs.GetBoolArg("-disablewallet", false)) return;
+
+    RegisterWalletRPCCommands(t);
+}
+
+bool VerifyWallets()
 {
     if (gArgs.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET))
         return true;
@@ -228,7 +236,7 @@ bool WalletVerify()
     return true;
 }
 
-bool InitLoadWallet()
+bool OpenWallets()
 {
     if (gArgs.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET)) {
         LogPrintf("Wallet disabled!\n");
@@ -245,3 +253,28 @@ bool InitLoadWallet()
 
     return true;
 }
+
+void StartWallets(CScheduler& scheduler) {
+    for (CWalletRef pwallet : vpwallets) {
+        pwallet->postInitProcess(scheduler);
+    }
+}
+
+void FlushWallets() {
+    for (CWalletRef pwallet : vpwallets) {
+        pwallet->Flush(false);
+    }
+}
+
+void StopWallets() {
+    for (CWalletRef pwallet : vpwallets) {
+        pwallet->Flush(true);
+    }
+}
+
+void CloseWallets() {
+    for (CWalletRef pwallet : vpwallets) {
+        delete pwallet;
+    }
+    vpwallets.clear();
+}
diff --git a/src/wallet/init.h b/src/wallet/init.h
index fa2251506d..0b3ee2dda2 100644
--- a/src/wallet/init.h
+++ b/src/wallet/init.h
@@ -8,18 +8,36 @@
 
 #include <string>
 
+class CRPCTable;
+class CScheduler;
+
 //! Return the wallets help message.
 std::string GetWalletHelpString(bool showDebug);
 
 //! Wallets parameter interaction
 bool WalletParameterInteraction();
 
+//! Register wallet RPCs.
+void RegisterWalletRPC(CRPCTable &tableRPC);
+
 //! Responsible for reading and validating the -wallet arguments and verifying the wallet database.
 //  This function will perform salvage on the wallet if requested, as long as only one wallet is
-//  being loaded (CWallet::ParameterInteraction forbids -salvagewallet, -zapwallettxes or -upgradewallet with multiwallet).
-bool WalletVerify();
+//  being loaded (WalletParameterInteraction forbids -salvagewallet, -zapwallettxes or -upgradewallet with multiwallet).
+bool VerifyWallets();
 
 //! Load wallet databases.
-bool InitLoadWallet();
+bool OpenWallets();
+
+//! Complete startup of wallets.
+void StartWallets(CScheduler& scheduler);
+
+//! Flush all wallets in preparation for shutdown.
+void FlushWallets();
+
+//! Stop all wallets. Wallets will be flushed first.
+void StopWallets();
+
+//! Close all wallets.
+void CloseWallets();
 
 #endif // BITCOIN_WALLET_INIT_H
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 1d79a9b906..ae89b3c0a1 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -3250,9 +3250,6 @@ static const CRPCCommand commands[] =
 
 void RegisterWalletRPCCommands(CRPCTable &t)
 {
-    if (gArgs.GetBoolArg("-disablewallet", false))
-        return;
-
     for (unsigned int vcidx = 0; vcidx < ARRAYLEN(commands); vcidx++)
         t.appendCommand(commands[vcidx].name, &commands[vcidx]);
 }
diff --git a/src/wallet/rpcwallet.h b/src/wallet/rpcwallet.h
index db0808b93b..14e51610d9 100644
--- a/src/wallet/rpcwallet.h
+++ b/src/wallet/rpcwallet.h
@@ -5,7 +5,10 @@
 #ifndef BITCOIN_WALLET_RPCWALLET_H
 #define BITCOIN_WALLET_RPCWALLET_H
 
+#include <string>
+
 class CRPCTable;
+class CWallet;
 class JSONRPCRequest;
 
 void RegisterWalletRPCCommands(CRPCTable &t);