log: Use LogError for fatal errors

diff --git a/src/addrman.cpp b/src/addrman.cpp
index 9c3a24db..5cd1d41f 100644
--- a/src/addrman.cpp
+++ b/src/addrman.cpp
@@ -1055,7 +1055,7 @@ void AddrManImpl::Check() const
 
     const int err{CheckAddrman()};
     if (err) {
-        LogPrintf("ADDRMAN CONSISTENCY CHECK FAILED!!! err=%i\n", err);
+        LogError("ADDRMAN CONSISTENCY CHECK FAILED!!! err=%i", err);
         assert(false);
     }
 }
diff --git a/src/dbwrapper.cpp b/src/dbwrapper.cpp
index cb9abee5..608f61f0 100644
--- a/src/dbwrapper.cpp
+++ b/src/dbwrapper.cpp
@@ -47,8 +47,8 @@ static void HandleError(const leveldb::Status& status)
     if (status.ok())
         return;
     const std::string errmsg = "Fatal LevelDB error: " + status.ToString();
-    LogPrintf("%s\n", errmsg);
-    LogPrintf("You can use -debug=leveldb to get more complete diagnostic messages\n");
+    LogError("%s", errmsg);
+    LogInfo("You can use -debug=leveldb to get more complete diagnostic messages");
     throw dbwrapper_error(errmsg);
 }
 
@@ -309,7 +309,7 @@ std::optional<std::string> CDBWrapper::ReadImpl(std::span<const std::byte> key)
     if (!status.ok()) {
         if (status.IsNotFound())
             return std::nullopt;
-        LogPrintf("LevelDB read failure: %s\n", status.ToString());
+        LogError("LevelDB read failure: %s", status.ToString());
         HandleError(status);
     }
     return strValue;
@@ -324,7 +324,7 @@ bool CDBWrapper::ExistsImpl(std::span<const std::byte> key) const
     if (!status.ok()) {
         if (status.IsNotFound())
             return false;
-        LogPrintf("LevelDB read failure: %s\n", status.ToString());
+        LogError("LevelDB read failure: %s", status.ToString());
         HandleError(status);
     }
     return true;
diff --git a/src/flatfile.cpp b/src/flatfile.cpp
index df6596e9..33d8baf4 100644
--- a/src/flatfile.cpp
+++ b/src/flatfile.cpp
@@ -41,11 +41,11 @@ FILE* FlatFileSeq::Open(const FlatFilePos& pos, bool read_only) const
     if (!file && !read_only)
         file = fsbridge::fopen(path, "wb+");
     if (!file) {
-        LogPrintf("Unable to open file %s\n", fs::PathToString(path));
+        LogError("Unable to open file %s", fs::PathToString(path));
         return nullptr;
     }
     if (pos.nPos && fseek(file, pos.nPos, SEEK_SET)) {
-        LogPrintf("Unable to seek to position %u of %s\n", pos.nPos, fs::PathToString(path));
+        LogError("Unable to seek to position %u of %s", pos.nPos, fs::PathToString(path));
         if (fclose(file) != 0) {
             LogError("Unable to close file %s", fs::PathToString(path));
         }
diff --git a/src/httpserver.cpp b/src/httpserver.cpp
index 684b85fa..c9f8e93f 100644
--- a/src/httpserver.cpp
+++ b/src/httpserver.cpp
@@ -462,7 +462,7 @@ bool InitHTTPServer(const util::SignalInterrupt& interrupt)
     raii_evhttp http_ctr = obtain_evhttp(base_ctr.get());
     struct evhttp* http = http_ctr.get();
     if (!http) {
-        LogPrintf("couldn't create evhttp. Exiting.\n");
+        LogError("Couldn't create evhttp. Exiting.");
         return false;
     }
 
@@ -472,7 +472,7 @@ bool InitHTTPServer(const util::SignalInterrupt& interrupt)
     evhttp_set_gencb(http, http_request_cb, (void*)&interrupt);
 
     if (!HTTPBindAddresses(http)) {
-        LogPrintf("Unable to bind any endpoint for RPC server\n");
+        LogError("Unable to bind any endpoint for RPC server");
         return false;
     }
 
diff --git a/src/node/utxo_snapshot.cpp b/src/node/utxo_snapshot.cpp
index ca5491bd..af06d832 100644
--- a/src/node/utxo_snapshot.cpp
+++ b/src/node/utxo_snapshot.cpp
@@ -32,14 +32,14 @@ bool WriteSnapshotBaseBlockhash(Chainstate& snapshot_chainstate)
     FILE* file{fsbridge::fopen(write_to, "wb")};
     AutoFile afile{file};
     if (afile.IsNull()) {
-        LogPrintf("[snapshot] failed to open base blockhash file for writing: %s\n",
+        LogError("[snapshot] failed to open base blockhash file for writing: %s",
                   fs::PathToString(write_to));
         return false;
     }
     afile << *snapshot_chainstate.m_from_snapshot_blockhash;
 
     if (afile.fclose() != 0) {
-        LogPrintf("[snapshot] failed to close base blockhash file %s after writing\n",
+        LogError("[snapshot] failed to close base blockhash file %s after writing",
                   fs::PathToString(write_to));
         return false;
     }
diff --git a/src/sync.cpp b/src/sync.cpp
index fb60e3cf..d33a01dc 100644
--- a/src/sync.cpp
+++ b/src/sync.cpp
@@ -90,8 +90,8 @@ LockData& GetLockData() {
 
 static void potential_deadlock_detected(const LockPair& mismatch, const LockStack& s1, const LockStack& s2)
 {
-    LogPrintf("POTENTIAL DEADLOCK DETECTED\n");
-    LogPrintf("Previous lock order was:\n");
+    LogError("POTENTIAL DEADLOCK DETECTED");
+    LogError("Previous lock order was:");
     for (const LockStackItem& i : s1) {
         std::string prefix{};
         if (i.first == mismatch.first) {
@@ -100,11 +100,11 @@ static void potential_deadlock_detected(const LockPair& mismatch, const LockStac
         if (i.first == mismatch.second) {
             prefix = " (2)";
         }
-        LogPrintf("%s %s\n", prefix, i.second.ToString());
+        LogError("%s %s", prefix, i.second.ToString());
     }
 
     std::string mutex_a, mutex_b;
-    LogPrintf("Current lock order is:\n");
+    LogError("Current lock order is:");
     for (const LockStackItem& i : s2) {
         std::string prefix{};
         if (i.first == mismatch.first) {
@@ -115,7 +115,7 @@ static void potential_deadlock_detected(const LockPair& mismatch, const LockStac
             prefix = " (2)";
             mutex_b = i.second.Name();
         }
-        LogPrintf("%s %s\n", prefix, i.second.ToString());
+        LogError("%s %s", prefix, i.second.ToString());
     }
     if (g_debug_lockorder_abort) {
         tfm::format(std::cerr, "Assertion failed: detected inconsistent lock order for %s, details in debug log.\n", s2.back().second.ToString());
@@ -126,14 +126,14 @@ static void potential_deadlock_detected(const LockPair& mismatch, const LockStac
 
 static void double_lock_detected(const void* mutex, const LockStack& lock_stack)
 {
-    LogPrintf("DOUBLE LOCK DETECTED\n");
-    LogPrintf("Lock order:\n");
+    LogError("DOUBLE LOCK DETECTED");
+    LogError("Lock order:");
     for (const LockStackItem& i : lock_stack) {
         std::string prefix{};
         if (i.first == mutex) {
             prefix = " (*)";
         }
-        LogPrintf("%s %s\n", prefix, i.second.ToString());
+        LogError("%s %s", prefix, i.second.ToString());
     }
     if (g_debug_lockorder_abort) {
         tfm::format(std::cerr,
@@ -223,10 +223,10 @@ void CheckLastCritical(void* cs, std::string& lockname, const char* guardname, c
         }
     }
 
-    LogPrintf("INCONSISTENT LOCK ORDER DETECTED\n");
-    LogPrintf("Current lock order (least recent first) is:\n");
+    LogError("INCONSISTENT LOCK ORDER DETECTED");
+    LogError("Current lock order (least recent first) is:");
     for (const LockStackItem& i : lock_stack) {
-        LogPrintf(" %s\n", i.second.ToString());
+        LogError(" %s", i.second.ToString());
     }
     if (g_debug_lockorder_abort) {
         tfm::format(std::cerr, "%s:%s %s was not most recent critical section locked, details in debug log.\n", file, line, guardname);
diff --git a/src/txdb.cpp b/src/txdb.cpp
index 2a1de5f8..68cb6939 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -137,7 +137,7 @@ bool CCoinsViewDB::BatchWrite(CoinsViewCacheCursor& cursor, const uint256 &hashB
             if (m_options.simulate_crash_ratio) {
                 static FastRandomContext rng;
                 if (rng.randrange(m_options.simulate_crash_ratio) == 0) {
-                    LogPrintf("Simulating a crash. Goodbye.\n");
+                    LogError("Simulating a crash. Goodbye.");
                     _Exit(0);
                 }
             }
diff --git a/src/util/fs_helpers.cpp b/src/util/fs_helpers.cpp
index b5dc1cb3..b23b2dc2 100644
--- a/src/util/fs_helpers.cpp
+++ b/src/util/fs_helpers.cpp
@@ -102,28 +102,28 @@ std::streampos GetFileSize(const char* path, std::streamsize max)
 bool FileCommit(FILE* file)
 {
     if (fflush(file) != 0) { // harmless if redundantly called
-        LogPrintf("fflush failed: %s\n", SysErrorString(errno));
+        LogError("fflush failed: %s", SysErrorString(errno));
         return false;
     }
 #ifdef WIN32
     HANDLE hFile = (HANDLE)_get_osfhandle(_fileno(file));
     if (FlushFileBuffers(hFile) == 0) {
-        LogPrintf("FlushFileBuffers failed: %s\n", Win32ErrorString(GetLastError()));
+        LogError("FlushFileBuffers failed: %s", Win32ErrorString(GetLastError()));
         return false;
     }
 #elif defined(__APPLE__) && defined(F_FULLFSYNC)
     if (fcntl(fileno(file), F_FULLFSYNC, 0) == -1) { // Manpage says "value other than -1" is returned on success
-        LogPrintf("fcntl F_FULLFSYNC failed: %s\n", SysErrorString(errno));
+        LogError("fcntl F_FULLFSYNC failed: %s", SysErrorString(errno));
         return false;
     }
 #elif HAVE_FDATASYNC
     if (fdatasync(fileno(file)) != 0 && errno != EINVAL) { // Ignore EINVAL for filesystems that don't support sync
-        LogPrintf("fdatasync failed: %s\n", SysErrorString(errno));
+        LogError("fdatasync failed: %s", SysErrorString(errno));
         return false;
     }
 #else
     if (fsync(fileno(file)) != 0 && errno != EINVAL) {
-        LogPrintf("fsync failed: %s\n", SysErrorString(errno));
+        LogError("fsync failed: %s", SysErrorString(errno));
         return false;
     }
 #endif
@@ -235,7 +235,7 @@ fs::path GetSpecialFolderPath(int nFolder, bool fCreate)
         return fs::path(pszPath);
     }
 
-    LogPrintf("SHGetSpecialFolderPathW() failed, could not obtain requested path.\n");
+    LogError("SHGetSpecialFolderPathW() failed, could not obtain requested path.");
     return fs::path("");
 }
 #endif
diff --git a/src/validation.cpp b/src/validation.cpp
index 8456dbb9..42a710b2 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -1196,7 +1196,7 @@ bool MemPoolAccept::ConsensusScriptChecks(const ATMPArgs& args, Workspace& ws)
     script_verify_flags currentBlockScriptVerifyFlags{GetBlockScriptFlags(*m_active_chainstate.m_chain.Tip(), m_active_chainstate.m_chainman)};
     if (!CheckInputsFromMempoolAndCache(tx, state, m_view, m_pool, currentBlockScriptVerifyFlags,
                                         ws.m_precomputed_txdata, m_active_chainstate.CoinsTip(), GetValidationCache())) {
-        LogPrintf("BUG! PLEASE REPORT THIS! CheckInputScripts failed against latest-block but not STANDARD flags %s, %s\n", hash.ToString(), state.ToString());
+        LogError("BUG! PLEASE REPORT THIS! CheckInputScripts failed against latest-block but not STANDARD flags %s, %s", hash.ToString(), state.ToString());
         return Assume(false);
     }
 
@@ -3378,8 +3378,8 @@ bool Chainstate::ActivateBestChain(BlockValidationState& state, std::shared_ptr<
     // Belt-and-suspenders check that we aren't attempting to advance the background
     // chainstate past the snapshot base block.
     if (WITH_LOCK(::cs_main, return m_disabled)) {
-        LogPrintf("m_disabled is set - this chainstate should not be in operation. "
-            "Please report this as a bug. %s\n", CLIENT_BUGREPORT);
+        LogError("m_disabled is set - this chainstate should not be in operation. "
+            "Please report this as a bug. %s", CLIENT_BUGREPORT);
         return false;
     }
 
@@ -4702,12 +4702,12 @@ VerifyDBResult CVerifyDB::VerifyDB(
         CBlock block;
         // check level 0: read from disk
         if (!chainstate.m_blockman.ReadBlock(block, *pindex)) {
-            LogPrintf("Verification error: ReadBlock failed at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
+            LogError("Verification error: ReadBlock failed at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
             return VerifyDBResult::CORRUPTED_BLOCK_DB;
         }
         // check level 1: verify block validity
         if (nCheckLevel >= 1 && !CheckBlock(block, state, consensus_params)) {
-            LogPrintf("Verification error: found bad block at %d, hash=%s (%s)\n",
+            LogError("Verification error: found bad block at %d, hash=%s (%s)",
                       pindex->nHeight, pindex->GetBlockHash().ToString(), state.ToString());
             return VerifyDBResult::CORRUPTED_BLOCK_DB;
         }
@@ -4716,7 +4716,7 @@ VerifyDBResult CVerifyDB::VerifyDB(
             CBlockUndo undo;
             if (!pindex->GetUndoPos().IsNull()) {
                 if (!chainstate.m_blockman.ReadBlockUndo(undo, *pindex)) {
-                    LogPrintf("Verification error: found bad undo data at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
+                    LogError("Verification error: found bad undo data at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
                     return VerifyDBResult::CORRUPTED_BLOCK_DB;
                 }
             }
@@ -4729,7 +4729,7 @@ VerifyDBResult CVerifyDB::VerifyDB(
                 assert(coins.GetBestBlock() == pindex->GetBlockHash());
                 DisconnectResult res = chainstate.DisconnectBlock(block, pindex, coins);
                 if (res == DISCONNECT_FAILED) {
-                    LogPrintf("Verification error: irrecoverable inconsistency in block data at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
+                    LogError("Verification error: irrecoverable inconsistency in block data at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
                     return VerifyDBResult::CORRUPTED_BLOCK_DB;
                 }
                 if (res == DISCONNECT_UNCLEAN) {
@@ -4745,7 +4745,7 @@ VerifyDBResult CVerifyDB::VerifyDB(
         if (chainstate.m_chainman.m_interrupt) return VerifyDBResult::INTERRUPTED;
     }
     if (pindexFailure) {
-        LogPrintf("Verification error: coin database inconsistencies found (last %i blocks, %i good transactions before that)\n", chainstate.m_chain.Height() - pindexFailure->nHeight + 1, nGoodTransactions);
+        LogError("Verification error: coin database inconsistencies found (last %i blocks, %i good transactions before that)", chainstate.m_chain.Height() - pindexFailure->nHeight + 1, nGoodTransactions);
         return VerifyDBResult::CORRUPTED_BLOCK_DB;
     }
     if (skipped_l3_checks) {
@@ -4768,11 +4768,11 @@ VerifyDBResult CVerifyDB::VerifyDB(
             pindex = chainstate.m_chain.Next(pindex);
             CBlock block;
             if (!chainstate.m_blockman.ReadBlock(block, *pindex)) {
-                LogPrintf("Verification error: ReadBlock failed at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
+                LogError("Verification error: ReadBlock failed at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
                 return VerifyDBResult::CORRUPTED_BLOCK_DB;
             }
             if (!chainstate.ConnectBlock(block, state, pindex, coins)) {
-                LogPrintf("Verification error: found unconnectable block at %d, hash=%s (%s)\n", pindex->nHeight, pindex->GetBlockHash().ToString(), state.ToString());
+                LogError("Verification error: found unconnectable block at %d, hash=%s (%s)", pindex->nHeight, pindex->GetBlockHash().ToString(), state.ToString());
                 return VerifyDBResult::CORRUPTED_BLOCK_DB;
             }
             if (chainstate.m_chainman.m_interrupt) return VerifyDBResult::INTERRUPTED;
@@ -5635,7 +5635,7 @@ Chainstate& ChainstateManager::InitializeChainstate(CTxMemPool* mempool)
     const bool destroyed = DestroyDB(path_str);
 
     if (!destroyed) {
-        LogPrintf("error: leveldb DestroyDB call failed on %s\n", path_str);
+        LogError("leveldb DestroyDB call failed on %s", path_str);
     }
 
     // Datadir should be removed from filesystem; otherwise initialization may detect
@@ -6334,8 +6334,8 @@ util::Result<void> Chainstate::InvalidateCoinsDBOnDisk()
         auto src_str = fs::PathToString(snapshot_datadir);
         auto dest_str = fs::PathToString(invalid_path);
 
-        LogPrintf("%s: error renaming file '%s' -> '%s': %s\n",
-                __func__, src_str, dest_str, e.what());
+        LogError("While invalidating the coins db: Error renaming file '%s' -> '%s': %s",
+                 src_str, dest_str, e.what());
         return util::Error{strprintf(_(
             "Rename of '%s' -> '%s' failed. "
             "You should resolve this by manually moving or deleting the invalid "
@@ -6354,7 +6354,7 @@ bool ChainstateManager::DeleteSnapshotChainstate()
 
     fs::path snapshot_datadir = Assert(node::FindSnapshotChainstateDir(m_options.datadir)).value();
     if (!DeleteCoinsDBFromDisk(snapshot_datadir, /*is_snapshot=*/ true)) {
-        LogPrintf("Deletion of %s failed. Please remove it manually to continue reindexing.\n",
+        LogError("Deletion of %s failed. Please remove it manually to continue reindexing.",
                   fs::PathToString(snapshot_datadir));
         return false;
     }
@@ -6416,8 +6416,8 @@ bool ChainstateManager::ValidatedSnapshotCleanup()
     // is in-memory, in which case we can't do on-disk cleanup. You'd better be
     // in a unittest!
     if (!ibd_chainstate_path_maybe || !snapshot_chainstate_path_maybe) {
-        LogPrintf("[snapshot] snapshot chainstate cleanup cannot happen with "
-                  "in-memory chainstates. You are testing, right?\n");
+        LogError("[snapshot] snapshot chainstate cleanup cannot happen with "
+                 "in-memory chainstates. You are testing, right?");
         return false;
     }
 
diff --git a/src/wallet/scriptpubkeyman.cpp b/src/wallet/scriptpubkeyman.cpp
index 27681714..dad21eaf 100644
--- a/src/wallet/scriptpubkeyman.cpp
+++ b/src/wallet/scriptpubkeyman.cpp
@@ -755,7 +755,7 @@ std::optional<MigrationData> LegacyDataSPKM::MigrateToDescriptor()
 
     // Make sure that we have accounted for all scriptPubKeys
     if (!Assume(spks.empty())) {
-        LogPrintf("%s\n", STR_INTERNAL_BUG("Error: Some output scripts were not migrated.\n"));
+        LogError("%s", STR_INTERNAL_BUG("Error: Some output scripts were not migrated."));
         return std::nullopt;
     }