rpcwallet: Replace pwallet-> with wallet.

pwallet is never null everywhere where it is dereferenced, so simply
replace it with a reference, which can not be null by definition.

Author: MarcoFalke

src/wallet/rpcwallet.cpp

@@ -1482,10 +1482,9 @@ UniValue listtransactions(const JSONRPCRequest& request)
 
 static UniValue listsinceblock(const JSONRPCRequest& request)
 {
-    std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
-    const CWallet* const pwallet = wallet.get();
+    std::shared_ptr<CWallet> const pwallet = GetWalletForJSONRPCRequest(request);
 
-    if (!EnsureWalletIsAvailable(pwallet, request.fHelp)) {
+    if (!EnsureWalletIsAvailable(pwallet.get(), request.fHelp)) {
         return NullUniValue;
     }
 
@@ -1542,11 +1541,12 @@ static UniValue listsinceblock(const JSONRPCRequest& request)
                 },
             }.Check(request);
 
+    const CWallet& wallet = *pwallet;
     // Make sure the results are valid at least up to the most recent block
     // the user could have gotten from another RPC command prior to now
-    pwallet->BlockUntilSyncedToCurrentChain();
+    wallet.BlockUntilSyncedToCurrentChain();
 
-    LOCK(pwallet->cs_wallet);
+    LOCK(wallet.cs_wallet);
 
     // The way the 'height' is initialized is just a workaround for the gcc bug #47679 since version 4.6.0.
     Optional<int> height = MakeOptional(false, int()); // Height of the specified block or the common ancestor, if the block provided was in a deactivated chain.
@@ -1559,7 +1559,7 @@ static UniValue listsinceblock(const JSONRPCRequest& request)
         blockId = ParseHashV(request.params[0], "blockhash");
         height = int{};
         altheight = int{};
-        if (!pwallet->chain().findCommonAncestor(blockId, pwallet->GetLastBlockHash(), /* ancestor out */ FoundBlock().height(*height), /* blockId out */ FoundBlock().height(*altheight))) {
+        if (!wallet.chain().findCommonAncestor(blockId, wallet.GetLastBlockHash(), /* ancestor out */ FoundBlock().height(*height), /* blockId out */ FoundBlock().height(*altheight))) {
             throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
         }
     }
@@ -1572,21 +1572,21 @@ static UniValue listsinceblock(const JSONRPCRequest& request)
         }
     }
 
-    if (ParseIncludeWatchonly(request.params[2], *pwallet)) {
+    if (ParseIncludeWatchonly(request.params[2], wallet)) {
         filter |= ISMINE_WATCH_ONLY;
     }
 
     bool include_removed = (request.params[3].isNull() || request.params[3].get_bool());
 
-    int depth = height ? pwallet->GetLastBlockHeight() + 1 - *height : -1;
+    int depth = height ? wallet.GetLastBlockHeight() + 1 - *height : -1;
 
     UniValue transactions(UniValue::VARR);
 
-    for (const std::pair<const uint256, CWalletTx>& pairWtx : pwallet->mapWallet) {
+    for (const std::pair<const uint256, CWalletTx>& pairWtx : wallet.mapWallet) {
         const CWalletTx& tx = pairWtx.second;
 
         if (depth == -1 || abs(tx.GetDepthInMainChain()) < depth) {
-            ListTransactions(pwallet, tx, 0, true, transactions, filter, nullptr /* filter_label */);
+            ListTransactions(&wallet, tx, 0, true, transactions, filter, nullptr /* filter_label */);
         }
     }
 
@@ -1595,23 +1595,23 @@ static UniValue listsinceblock(const JSONRPCRequest& request)
     UniValue removed(UniValue::VARR);
     while (include_removed && altheight && *altheight > *height) {
         CBlock block;
-        if (!pwallet->chain().findBlock(blockId, FoundBlock().data(block)) || block.IsNull()) {
+        if (!wallet.chain().findBlock(blockId, FoundBlock().data(block)) || block.IsNull()) {
             throw JSONRPCError(RPC_INTERNAL_ERROR, "Can't read block from disk");
         }
         for (const CTransactionRef& tx : block.vtx) {
-            auto it = pwallet->mapWallet.find(tx->GetHash());
-            if (it != pwallet->mapWallet.end()) {
+            auto it = wallet.mapWallet.find(tx->GetHash());
+            if (it != wallet.mapWallet.end()) {
                 // We want all transactions regardless of confirmation count to appear here,
                 // even negative confirmation ones, hence the big negative.
-                ListTransactions(pwallet, it->second, -100000000, true, removed, filter, nullptr /* filter_label */);
+                ListTransactions(&wallet, it->second, -100000000, true, removed, filter, nullptr /* filter_label */);
             }
         }
         blockId = block.hashPrevBlock;
         --*altheight;
     }
 
     uint256 lastblock;
-    CHECK_NONFATAL(pwallet->chain().findAncestorByHeight(pwallet->GetLastBlockHash(), pwallet->GetLastBlockHeight() + 1 - target_confirms, FoundBlock().hash(lastblock)));
+    CHECK_NONFATAL(wallet.chain().findAncestorByHeight(wallet.GetLastBlockHash(), wallet.GetLastBlockHeight() + 1 - target_confirms, FoundBlock().hash(lastblock)));
 
     UniValue ret(UniValue::VOBJ);
     ret.pushKV("transactions", transactions);