diff --git a/src/bench/bench_bitcoin.cpp b/src/bench/bench_bitcoin.cpp
--- a/src/bench/bench_bitcoin.cpp
+++ b/src/bench/bench_bitcoin.cpp
@@ -72,7 +72,7 @@
     std::string error;
     if (!gArgs.ParseParameters(argc, argv, error)) {
         tfm::format(std::cerr, "Error parsing command line arguments: %s\n",
-                    error.c_str());
+                    error);
         return EXIT_FAILURE;
     }
 
@@ -89,7 +89,7 @@
     double scaling_factor;
     if (!ParseDouble(scaling_str, &scaling_factor)) {
         tfm::format(std::cerr, "Error parsing scaling factor as double: %s\n",
-                    scaling_str.c_str());
+                    scaling_str);
         return EXIT_FAILURE;
     }
 
diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -154,7 +154,7 @@
     std::string error;
     if (!gArgs.ParseParameters(argc, argv, error)) {
         tfm::format(std::cerr, "Error parsing command line arguments: %s\n",
-                    error.c_str());
+                    error);
         return EXIT_FAILURE;
     }
     if (argc < 2 || HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
@@ -175,7 +175,7 @@
             strUsage += "\n" + gArgs.GetHelpMessage();
         }
 
-        tfm::format(std::cout, "%s", strUsage.c_str());
+        tfm::format(std::cout, "%s", strUsage);
         if (argc < 2) {
             tfm::format(std::cerr, "Error: too few parameters\n");
             return EXIT_FAILURE;
@@ -185,12 +185,11 @@
     if (!CheckDataDirOption()) {
         tfm::format(std::cerr,
                     "Error: Specified data directory \"%s\" does not exist.\n",
-                    gArgs.GetArg("-datadir", "").c_str());
+                    gArgs.GetArg("-datadir", ""));
         return EXIT_FAILURE;
     }
     if (!gArgs.ReadConfigFiles(error, true)) {
-        tfm::format(std::cerr, "Error reading configuration file: %s\n",
-                    error.c_str());
+        tfm::format(std::cerr, "Error reading configuration file: %s\n", error);
         return EXIT_FAILURE;
     }
     // Check for -chain, -testnet or -regtest parameter (BaseParams() calls are
@@ -478,8 +477,7 @@
                 "could be found, and RPC password is not set.  See "
                 "-rpcpassword and -stdinrpcpass.  Configuration file: (%s)",
                 GetConfigFile(gArgs.GetArg("-conf", BITCOIN_CONF_FILENAME))
-                    .string()
-                    .c_str()));
+                    .string()));
         } else {
             throw std::runtime_error(
                 "Authorization failed: Incorrect rpcuser or rpcpassword");
@@ -615,8 +613,7 @@
     }
 
     if (strPrint != "") {
-        tfm::format(nRet == 0 ? std::cout : std::cerr, "%s\n",
-                    strPrint.c_str());
+        tfm::format(nRet == 0 ? std::cout : std::cerr, "%s\n", strPrint);
     }
     return nRet;
 }
diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -110,7 +110,7 @@
     std::string error;
     if (!gArgs.ParseParameters(argc, argv, error)) {
         tfm::format(std::cerr, "Error parsing command line arguments: %s\n",
-                    error.c_str());
+                    error);
         return EXIT_FAILURE;
     }
 
@@ -136,7 +136,8 @@
             "hex-encoded bitcoin transaction\n" +
             "\n";
         strUsage += gArgs.GetHelpMessage();
-        tfm::format(std::cout, "%s", strUsage.c_str());
+
+        tfm::format(std::cout, "%s", strUsage);
 
         if (argc < 2) {
             tfm::format(std::cerr, "Error: too few parameters\n");
@@ -763,20 +764,20 @@
     TxToUniv(tx, uint256(), entry);
 
     std::string jsonOutput = entry.write(4);
-    tfm::format(std::cout, "%s\n", jsonOutput.c_str());
+    tfm::format(std::cout, "%s\n", jsonOutput);
 }
 
 static void OutputTxHash(const CTransaction &tx) {
     // the hex-encoded transaction id.
     std::string strHexHash = tx.GetId().GetHex();
 
-    tfm::format(std::cout, "%s\n", strHexHash.c_str());
+    tfm::format(std::cout, "%s\n", strHexHash);
 }
 
 static void OutputTxHex(const CTransaction &tx) {
     std::string strHex = EncodeHexTx(tx);
 
-    tfm::format(std::cout, "%s\n", strHex.c_str());
+    tfm::format(std::cout, "%s\n", strHex);
 }
 
 static void OutputTx(const CTransaction &tx) {
@@ -871,8 +872,7 @@
     }
 
     if (strPrint != "") {
-        tfm::format(nRet == 0 ? std::cout : std::cerr, "%s\n",
-                    strPrint.c_str());
+        tfm::format(nRet == 0 ? std::cout : std::cerr, "%s\n", strPrint);
     }
 
     return nRet;
diff --git a/src/bitcoin-wallet.cpp b/src/bitcoin-wallet.cpp
--- a/src/bitcoin-wallet.cpp
+++ b/src/bitcoin-wallet.cpp
@@ -51,7 +51,7 @@
     std::string error_message;
     if (!gArgs.ParseParameters(argc, argv, error_message)) {
         tfm::format(std::cerr, "Error parsing command line arguments: %s\n",
-                    error_message.c_str());
+                    error_message);
         return false;
     }
     if (argc < 2 || HelpRequested(gArgs)) {
@@ -67,7 +67,7 @@
             "Usage:\n" + "  bitcoin-wallet [options] <command>\n\n" +
             gArgs.GetHelpMessage();
 
-        tfm::format(std::cout, "%s", usage.c_str());
+        tfm::format(std::cout, "%s", usage);
         return false;
     }
 
@@ -78,7 +78,7 @@
     if (!CheckDataDirOption()) {
         tfm::format(std::cerr,
                     "Error: Specified data directory \"%s\" does not exist.\n",
-                    gArgs.GetArg("-datadir", "").c_str());
+                    gArgs.GetArg("-datadir", ""));
         return false;
     }
     // Check for -testnet or -regtest parameter (Params() calls are only valid
@@ -114,7 +114,7 @@
                 tfm::format(std::cerr,
                             "Error: two methods provided (%s and %s). Only one "
                             "method should be provided.\n",
-                            method.c_str(), argv[i]);
+                            method, argv[i]);
                 return EXIT_FAILURE;
             }
             method = argv[i];
diff --git a/src/bitcoind.cpp b/src/bitcoind.cpp
--- a/src/bitcoind.cpp
+++ b/src/bitcoind.cpp
@@ -100,7 +100,7 @@
             strUsage += "\n" + gArgs.GetHelpMessage();
         }
 
-        tfm::format(std::cout, "%s", strUsage.c_str());
+        tfm::format(std::cout, "%s", strUsage);
         return true;
     }
 
diff --git a/src/init.cpp b/src/init.cpp
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1613,7 +1613,7 @@
     if (!fs::is_directory(GetBlocksDir())) {
         return InitError(
             strprintf(_("Specified blocks directory \"%s\" does not exist."),
-                      gArgs.GetArg("-blocksdir", "").c_str()));
+                      gArgs.GetArg("-blocksdir", "")));
     }
 
     // if using block pruning, then disallow txindex
diff --git a/src/net.cpp b/src/net.cpp
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1432,7 +1432,7 @@
                     CNetAddr resolved;
                     if (LookupHost(externalIPAddress, resolved, false)) {
                         LogPrintf("UPnP: ExternalIPAddress = %s\n",
-                                  resolved.ToString().c_str());
+                                  resolved.ToString());
                         AddLocal(resolved, LOCAL_UPNP);
                     }
                 } else {
@@ -2712,7 +2712,7 @@
     size_t nMessageSize = msg.data.size();
     size_t nTotalSize = nMessageSize + CMessageHeader::HEADER_SIZE;
     LogPrint(BCLog::NET, "sending %s (%d bytes) peer=%d\n",
-             SanitizeString(msg.command.c_str()), nMessageSize, pnode->GetId());
+             SanitizeString(msg.command), nMessageSize, pnode->GetId());
 
     std::vector<uint8_t> serializedHeader;
     serializedHeader.reserve(CMessageHeader::HEADER_SIZE);
diff --git a/src/net_processing.cpp b/src/net_processing.cpp
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -1158,12 +1158,12 @@
         LogPrintf(
             "%s: %s peer=%d (%d -> %d) reason: %s BAN THRESHOLD EXCEEDED\n",
             __func__, state->name, pnode, state->nMisbehavior - howmuch,
-            state->nMisbehavior, reason.c_str());
+            state->nMisbehavior, reason);
         state->fShouldBan = true;
     } else {
         LogPrintf("%s: %s peer=%d (%d -> %d) reason: %s\n", __func__,
                   state->name, pnode, state->nMisbehavior - howmuch,
-                  state->nMisbehavior, reason.c_str());
+                  state->nMisbehavior, reason);
     }
 }
 
@@ -2284,7 +2284,7 @@
         LogPrint(BCLog::NET,
                  "receive version message: [%s] %s: version %d, blocks=%d, "
                  "us=%s, peer=%d%s\n",
-                 pfrom->addr.ToString().c_str(), cleanSubVer, pfrom->nVersion,
+                 pfrom->addr.ToString(), cleanSubVer, pfrom->nVersion,
                  pfrom->nStartingHeight, addrMe.ToString(), pfrom->GetId(),
                  remoteAddr);
 
diff --git a/src/noui.cpp b/src/noui.cpp
--- a/src/noui.cpp
+++ b/src/noui.cpp
@@ -45,7 +45,7 @@
     if (!fSecure) {
         LogPrintf("%s: %s\n", strCaption, message);
     }
-    tfm::format(std::cerr, "%s: %s\n", strCaption.c_str(), message.c_str());
+    tfm::format(std::cerr, "%s%s\n", strCaption, message);
     return false;
 }
 
diff --git a/src/seeder/bitcoin.cpp b/src/seeder/bitcoin.cpp
--- a/src/seeder/bitcoin.cpp
+++ b/src/seeder/bitcoin.cpp
@@ -26,7 +26,7 @@
     nHeaderStart = vSend.size();
     vSend << CMessageHeader(netMagic, pszCommand, 0);
     nMessageStart = vSend.size();
-    // tfm::format(std::cout, "%s: SEND %s\n", ToString(you).c_str(),
+    // tfm::format(std::cout, "%s: SEND %s\n", ToString(you),
     // pszCommand);
 }
 
@@ -93,8 +93,8 @@
 
 PeerMessagingState CSeederNode::ProcessMessage(std::string strCommand,
                                                CDataStream &recv) {
-    // tfm::format(std::cout, "%s: RECV %s\n", ToString(you).c_str(),
-    // strCommand.c_str());
+    // tfm::format(std::cout, "%s: RECV %s\n", ToString(you),
+    // strCommand);
     if (strCommand == "version") {
         int64_t nTime;
         CAddress addrMe;
@@ -115,7 +115,7 @@
 
     if (strCommand == "verack") {
         vRecv.SetVersion(std::min(nVersion, PROTOCOL_VERSION));
-        // tfm::format(std::cout, "\n%s: version %i\n", ToString(you).c_str(),
+        // tfm::format(std::cout, "\n%s: version %i\n", ToString(you),
         // nVersion);
         if (vAddr) {
             BeginMessage("getaddr");
@@ -131,7 +131,7 @@
         std::vector<CAddress> vAddrNew;
         recv >> vAddrNew;
         // tfm::format(std::cout, "%s: got %i addresses\n",
-        // ToString(you).c_str(),
+        // ToString(you),
         //        (int)vAddrNew.size());
         int64_t now = time(nullptr);
         std::vector<CAddress>::iterator it = vAddrNew.begin();
@@ -143,8 +143,8 @@
         while (it != vAddrNew.end()) {
             CAddress &addr = *it;
             // tfm::format(std::cout, "%s: got address %s\n",
-            // ToString(you).c_str(),
-            //        addr.ToString().c_str(), (int)(vAddr->size()));
+            // ToString(you),
+            //        addr.ToString(), (int)(vAddr->size()));
             it++;
             if (addr.nTime <= 100000000 || addr.nTime > now + 600) {
                 addr.nTime = now - 5 * 86400;
@@ -153,8 +153,8 @@
                 vAddr->push_back(addr);
             }
             // tfm::format(std::cout, "%s: added address %s (#%i)\n",
-            // ToString(you).c_str(),
-            //        addr.ToString().c_str(), (int)(vAddr->size()));
+            // ToString(you),
+            //        addr.ToString(), (int)(vAddr->size()));
             if (vAddr->size() > ADDR_SOFT_CAP) {
                 doneAfter = 1;
                 return PeerMessagingState::Finished;
@@ -189,7 +189,7 @@
         vRecv >> hdr;
         if (!hdr.IsValidWithoutConfig(netMagic)) {
             // tfm::format(std::cout, "%s: BAD (invalid header)\n",
-            // ToString(you).c_str());
+            // ToString(you));
             ban = 100000;
             return true;
         }
@@ -197,7 +197,7 @@
         unsigned int nMessageSize = hdr.nMessageSize;
         if (nMessageSize > MAX_SIZE) {
             // tfm::format(std::cout, "%s: BAD (message too large)\n",
-            // ToString(you).c_str());
+            // ToString(you));
             ban = 100000;
             return true;
         }
@@ -219,8 +219,8 @@
             return true;
         }
         // tfm::format(std::cout, "%s: done processing %s\n",
-        // ToString(you).c_str(),
-        //        strCommand.c_str());
+        // ToString(you),
+        //        strCommand);
     } while (1);
     return false;
 }
@@ -265,7 +265,7 @@
 
     if (!connected) {
         // tfm::format(std::cout, "Cannot connect to %s\n",
-        // ToString(you).c_str());
+        // ToString(you));
         CloseSocket(sock);
         return false;
     }
@@ -308,12 +308,12 @@
         } else if (nBytes == 0) {
             // tfm::format(std::cout, "%s: BAD (connection closed
             // prematurely)\n",
-            //        ToString(you).c_str());
+            //        ToString(you));
             res = false;
             break;
         } else {
             // tfm::format(std::cout, "%s: BAD (connection error)\n",
-            // ToString(you).c_str());
+            // ToString(you));
             res = false;
             break;
         }
diff --git a/src/seeder/db.cpp b/src/seeder/db.cpp
--- a/src/seeder/db.cpp
+++ b/src/seeder/db.cpp
@@ -30,7 +30,7 @@
     }
     //  tfm::format(std::cout, "%s: got %s result: success=%i/%i;
     //  2H:%.2f%%-%.2f%%(%.2f) 8H:%.2f%%-%.2f%%(%.2f) 1D:%.2f%%-%.2f%%(%.2f)
-    //  1W:%.2f%%-%.2f%%(%.2f) \n", ToString(ip).c_str(), good ? "good" : "bad",
+    //  1W:%.2f%%-%.2f%%(%.2f) \n", ToString(ip), good ? "good" : "bad",
     //  success, total, 100.0 * stat2H.reliability, 100.0 * (stat2H.reliability
     //  + 1.0 - stat2H.weight), stat2H.count, 100.0 * stat8H.reliability, 100.0
     //  * (stat8H.reliability + 1.0 - stat8H.weight), stat8H.count, 100.0 *
@@ -100,7 +100,7 @@
     if (info.IsReliable() && goodId.count(id) == 0) {
         goodId.insert(id);
         //    tfm::format(std::cout, "%s: good; %i good nodes now\n",
-        //    ToString(addr).c_str(), (int)goodId.size());
+        //    ToString(addr), (int)goodId.size());
     }
     nDirty++;
     ourId.push_back(id);
@@ -117,14 +117,14 @@
     uint32_t now = time(nullptr);
     int ter = info.GetBanTime();
     if (ter) {
-        //    tfm::format(std::cout, "%s: terrible\n", ToString(addr).c_str());
+        //    tfm::format(std::cout, "%s: terrible\n", ToString(addr));
         if (ban < ter) {
             ban = ter;
         }
     }
     if (ban > 0) {
         //    tfm::format(std::cout, "%s: ban for %i seconds\n",
-        //    ToString(addr).c_str(), ban);
+        //    ToString(addr), ban);
         banned[info.ip] = ban + now;
         ipToId.erase(info.ip);
         goodId.erase(id);
@@ -133,7 +133,7 @@
         if (/*!info.IsReliable() && */ goodId.count(id) == 1) {
             goodId.erase(id);
             //      tfm::format(std::cout, "%s: not good; %i good nodes left\n",
-            //      ToString(addr).c_str(), (int)goodId.size());
+            //      ToString(addr), (int)goodId.size());
         }
         ourId.push_back(id);
     }
@@ -159,7 +159,7 @@
             ai.lastTry = addr.nTime;
             ai.services |= addr.nServices;
             //      tfm::format(std::cout, "%s: updated\n",
-            //      ToString(addr).c_str());
+            //      ToString(addr));
         }
         if (force) {
             ai.ignoreTill = 0;
@@ -177,7 +177,7 @@
     int id = nId++;
     idToInfo[id] = ai;
     ipToId[ipp] = id;
-    //  tfm::format(std::cout, "%s: added\n", ToString(ipp).c_str(),
+    //  tfm::format(std::cout, "%s: added\n", ToString(ipp),
     //  ipToId[ipp]);
     unkId.insert(id);
     nDirty++;
diff --git a/src/seeder/main.cpp b/src/seeder/main.cpp
--- a/src/seeder/main.cpp
+++ b/src/seeder/main.cpp
@@ -64,7 +64,7 @@
         std::string error;
         if (!gArgs.ParseParameters(argc, argv, error)) {
             tfm::format(std::cerr, "Error parsing command line arguments: %s\n",
-                        error.c_str());
+                        error);
             return EXIT_FAILURE;
         }
         if (HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
@@ -77,7 +77,7 @@
                     gArgs.GetHelpMessage();
             }
 
-            tfm::format(std::cout, "%s", strUsage.c_str());
+            tfm::format(std::cout, "%s", strUsage);
             return EXIT_SUCCESS;
         }
 
@@ -201,7 +201,7 @@
                 res.nClientV = node.GetClientVersion();
                 res.strClientV = node.GetClientSubVersion();
                 res.nHeight = node.GetStartingHeight();
-                // tfm::format(std::cout, "%s: %s!!!\n", cip.ToString().c_str(),
+                // tfm::format(std::cout, "%s: %s!!!\n", cip.ToString(),
                 // ret ? "GOOD" : "BAD");
                 res.fGood = ret;
             } catch (std::ios_base::failure &e) {
@@ -402,11 +402,11 @@
                     "%-47s  %4d  %11" PRId64
                     "  %6.2f%% %6.2f%% %6.2f%% %6.2f%% %6.2f%%  %6i  %08" PRIx64
                     "  %5i \"%s\"\n",
-                    rep.ip.ToString().c_str(), (int)rep.fGood, rep.lastSuccess,
+                    rep.ip.ToString(), (int)rep.fGood, rep.lastSuccess,
                     100.0 * rep.uptime[0], 100.0 * rep.uptime[1],
                     100.0 * rep.uptime[2], 100.0 * rep.uptime[3],
                     100.0 * rep.uptime[4], rep.blocks, rep.services,
-                    rep.clientVersion, rep.clientSubVersion.c_str());
+                    rep.clientVersion, rep.clientSubVersion);
                 stat[0] += rep.uptime[0];
                 stat[1] += rep.uptime[1];
                 stat[2] += rep.uptime[2];
@@ -499,7 +499,7 @@
         CService service(LookupNumeric(opts.tor.c_str(), 9050));
         if (service.IsValid()) {
             tfm::format(std::cout, "Using Tor proxy at %s\n",
-                        service.ToStringIPPort().c_str());
+                        service.ToStringIPPort());
             SetProxy(NET_ONION, proxyType(service));
         }
     }
@@ -507,7 +507,7 @@
         CService service(LookupNumeric(opts.ipv4_proxy.c_str(), 9050));
         if (service.IsValid()) {
             tfm::format(std::cout, "Using IPv4 proxy at %s\n",
-                        service.ToStringIPPort().c_str());
+                        service.ToStringIPPort());
             SetProxy(NET_IPV4, proxyType(service));
         }
     }
@@ -515,12 +515,12 @@
         CService service(LookupNumeric(opts.ipv6_proxy.c_str(), 9050));
         if (service.IsValid()) {
             tfm::format(std::cout, "Using IPv6 proxy at %s\n",
-                        service.ToStringIPPort().c_str());
+                        service.ToStringIPPort());
             SetProxy(NET_IPV6, proxyType(service));
         }
     }
     bool fDNS = true;
-    tfm::format(std::cout, "Using %s.\n", gArgs.GetChainName().c_str());
+    tfm::format(std::cout, "Using %s.\n", gArgs.GetChainName());
     netMagic = Params().NetMagic();
     if (opts.ns.empty()) {
         tfm::format(std::cout, "No nameserver set. Not starting DNS server.\n");
@@ -551,9 +551,9 @@
     }
     pthread_t threadDns, threadSeed, threadDump, threadStats;
     if (fDNS) {
-        tfm::format(
-            std::cout, "Starting %i DNS threads for %s on %s (port %i)...",
-            opts.nDnsThreads, opts.host.c_str(), opts.ns.c_str(), opts.nPort);
+        tfm::format(std::cout,
+                    "Starting %i DNS threads for %s on %s (port %i)...",
+                    opts.nDnsThreads, opts.host, opts.ns, opts.nPort);
         dnsThread.clear();
         for (int i = 0; i < opts.nDnsThreads; i++) {
             dnsThread.push_back(new CDnsThread(&opts, i));
diff --git a/src/sync.cpp b/src/sync.cpp
--- a/src/sync.cpp
+++ b/src/sync.cpp
@@ -170,7 +170,7 @@
     }
     tfm::format(std::cerr,
                 "Assertion failed: lock %s not held in %s:%i; locks held:\n%s",
-                pszName, pszFile, nLine, LocksHeld().c_str());
+                pszName, pszFile, nLine, LocksHeld());
     abort();
 }
 
@@ -181,7 +181,7 @@
             tfm::format(
                 std::cerr,
                 "Assertion failed: lock %s held in %s:%i; locks held:\n%s",
-                pszName, pszFile, nLine, LocksHeld().c_str());
+                pszName, pszFile, nLine, LocksHeld());
             abort();
         }
     }
diff --git a/src/util/system.cpp b/src/util/system.cpp
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -641,8 +641,7 @@
 void PrintExceptionContinue(const std::exception *pex, const char *pszThread) {
     std::string message = FormatException(pex, pszThread);
     LogPrintf("\n\n************************\n%s\n", message);
-    tfm::format(std::cerr, "\n\n************************\n%s\n",
-                message.c_str());
+    tfm::format(std::cerr, "\n\n************************\n%s\n", message);
 }
 
 fs::path GetDefaultDataDir() {
diff --git a/src/wallet/wallettool.cpp b/src/wallet/wallettool.cpp
--- a/src/wallet/wallettool.cpp
+++ b/src/wallet/wallettool.cpp
@@ -38,7 +38,7 @@
     bool first_run = true;
     DBErrors load_wallet_ret = wallet_instance->LoadWallet(first_run);
     if (load_wallet_ret != DBErrors::LOAD_OK) {
-        tfm::format(std::cerr, "Error creating %s", name.c_str());
+        tfm::format(std::cerr, "Error creating %s", name);
         return nullptr;
     }
 
@@ -74,27 +74,25 @@
         tfm::format(
             std::cerr,
             "Error loading %s. Is wallet being used by another process?\n",
-            name.c_str());
+            name);
         return nullptr;
     }
 
     if (load_wallet_ret != DBErrors::LOAD_OK) {
         wallet_instance = nullptr;
         if (load_wallet_ret == DBErrors::CORRUPT) {
-            tfm::format(std::cerr, "Error loading %s: Wallet corrupted",
-                        name.c_str());
+            tfm::format(std::cerr, "Error loading %s: Wallet corrupted", name);
             return nullptr;
         } else if (load_wallet_ret == DBErrors::NONCRITICAL_ERROR) {
             tfm::format(
                 std::cerr,
-                "Error reading %s! All keys read correctly, but "
-                "transaction data"
-                " or address book entries might be missing or incorrect.",
-                name.c_str());
+                "Error reading %s! All keys read correctly, but transaction "
+                "data or address book entries might be missing or incorrect.",
+                name);
         } else if (load_wallet_ret == DBErrors::TOO_NEW) {
             tfm::format(std::cerr,
                         "Error loading %s: Wallet requires newer version of %s",
-                        name.c_str(), PACKAGE_NAME);
+                        name, PACKAGE_NAME);
             return nullptr;
         } else if (load_wallet_ret == DBErrors::NEED_REWRITE) {
             tfm::format(std::cerr,
@@ -102,7 +100,7 @@
                         PACKAGE_NAME);
             return nullptr;
         } else {
-            tfm::format(std::cerr, "Error loading %s", name.c_str());
+            tfm::format(std::cerr, "Error loading %s", name);
             return nullptr;
         }
     }
@@ -139,8 +137,7 @@
         }
     } else if (command == "info") {
         if (!fs::exists(path)) {
-            tfm::format(std::cerr, "Error: no wallet file at %s\n",
-                        name.c_str());
+            tfm::format(std::cerr, "Error: no wallet file at %s\n", name);
             return false;
         }
         std::string error;
@@ -148,7 +145,7 @@
             tfm::format(
                 std::cerr,
                 "Error loading %s. Is wallet being used by other process?\n",
-                name.c_str());
+                name);
             return false;
         }
         std::shared_ptr<CWallet> wallet_instance = LoadWallet(name, path);
@@ -158,7 +155,7 @@
         WalletShowInfo(wallet_instance.get());
         wallet_instance->Flush();
     } else {
-        tfm::format(std::cerr, "Invalid command: %s\n", command.c_str());
+        tfm::format(std::cerr, "Invalid command: %s\n", command);
         return false;
     }