refactor: Combine GetWalletForJSONRPCRequest and EnsureWalletIsAvailable functions

This simplifies control flow and also helps get rid of the ::vpwallets
variable, because EnsureWalletIsAvailable doesn't have access to the request
context.

Author: ryanofsky

src/wallet/rpcdump.cpp

@@ -93,10 +93,8 @@ static void RescanWallet(CWallet& wallet, const WalletRescanReserver& reserver,
 UniValue importprivkey(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
+    if (!wallet) return NullUniValue;
     CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"importprivkey",
                 "\nAdds a private key (as returned by dumpprivkey) to your wallet. Requires a new wallet backup.\n"
@@ -196,10 +194,8 @@ UniValue importprivkey(const JSONRPCRequest& request)
 UniValue abortrescan(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
+    if (!wallet) return NullUniValue;
     CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"abortrescan",
                 "\nStops current wallet rescan triggered by an RPC call, e.g. by an importprivkey call.\n"
@@ -224,10 +220,8 @@ UniValue abortrescan(const JSONRPCRequest& request)
 UniValue importaddress(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
+    if (!wallet) return NullUniValue;
     CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"importaddress",
                 "\nAdds an address or script (in hex) that can be watched as if it were in your wallet but cannot be used to spend. Requires a new wallet backup.\n"
@@ -326,10 +320,8 @@ UniValue importaddress(const JSONRPCRequest& request)
 UniValue importprunedfunds(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
+    if (!wallet) return NullUniValue;
     CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"importprunedfunds",
                 "\nImports funds without rescan. Corresponding address or script must previously be included in wallet. Aimed towards pruned wallets. The end-user is responsible to import additional transactions that subsequently spend the imported outputs or rescan after the point in the blockchain the transaction is included.\n",
@@ -384,10 +376,8 @@ UniValue importprunedfunds(const JSONRPCRequest& request)
 UniValue removeprunedfunds(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
+    if (!wallet) return NullUniValue;
     CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"removeprunedfunds",
                 "\nDeletes the specified transaction from the wallet. Meant for use with pruned wallets and as a companion to importprunedfunds. This will affect wallet balances.\n",
@@ -423,10 +413,8 @@ UniValue removeprunedfunds(const JSONRPCRequest& request)
 UniValue importpubkey(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
+    if (!wallet) return NullUniValue;
     CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"importpubkey",
                 "\nAdds a public key (in hex) that can be watched as if it were in your wallet but cannot be used to spend. Requires a new wallet backup.\n"
@@ -510,10 +498,8 @@ UniValue importpubkey(const JSONRPCRequest& request)
 UniValue importwallet(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
+    if (!wallet) return NullUniValue;
     CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"importwallet",
                 "\nImports keys from a wallet dump file (see dumpwallet). Requires a new wallet backup to include imported keys.\n"
@@ -668,10 +654,8 @@ UniValue importwallet(const JSONRPCRequest& request)
 UniValue dumpprivkey(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
+    if (!wallet) return NullUniValue;
     const CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"dumpprivkey",
                 "\nReveals the private key corresponding to 'address'.\n"
@@ -715,9 +699,7 @@ UniValue dumpprivkey(const JSONRPCRequest& request)
 UniValue dumpwallet(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
-    if (!EnsureWalletIsAvailable(pwallet.get(), request.fHelp)) {
-        return NullUniValue;
-    }
+    if (!pwallet) return NullUniValue;
 
             RPCHelpMan{"dumpwallet",
                 "\nDumps all wallet keys in a human-readable format to a server-side file. This does not allow overwriting existing files.\n"
@@ -1260,10 +1242,8 @@ static int64_t GetImportTimestamp(const UniValue& data, int64_t now)
 UniValue importmulti(const JSONRPCRequest& mainRequest)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(mainRequest);
+    if (!wallet) return NullUniValue;
     CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, mainRequest.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"importmulti",
                 "\nImport addresses/scripts (with private or public keys, redeem script (P2SH)), optionally rescanning the blockchain from the earliest creation time of the imported scripts. Requires a new wallet backup.\n"
@@ -1588,10 +1568,8 @@ static UniValue ProcessDescriptorImport(CWallet * const pwallet, const UniValue&
 UniValue importdescriptors(const JSONRPCRequest& main_request) {
     // Acquire the wallet
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(main_request);
+    if (!wallet) return NullUniValue;
     CWallet* const pwallet = wallet.get();
-    if (!EnsureWalletIsAvailable(pwallet, main_request.fHelp)) {
-        return NullUniValue;
-    }
 
             RPCHelpMan{"importdescriptors",
                 "\nImport descriptors. This will trigger a rescan of the blockchain based on the earliest timestamp of all descriptors being imported. Requires a new wallet backup.\n"