diff --git a/src/rpc/handlers/AMMInfo.cpp b/src/rpc/handlers/AMMInfo.cpp
index 89d9a2235..27fc1b3e4 100644
--- a/src/rpc/handlers/AMMInfo.cpp
+++ b/src/rpc/handlers/AMMInfo.cpp
@@ -103,7 +103,7 @@ AMMInfoHandler::process(AMMInfoHandler::Input const& input, Context const& ctx)
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountChannels.cpp b/src/rpc/handlers/AccountChannels.cpp
index e6cab7648..80dd945c4 100644
--- a/src/rpc/handlers/AccountChannels.cpp
+++ b/src/rpc/handlers/AccountChannels.cpp
@@ -97,7 +97,7 @@ AccountChannelsHandler::process(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountCurrencies.cpp b/src/rpc/handlers/AccountCurrencies.cpp
index 2e7980f7c..12a05da07 100644
--- a/src/rpc/handlers/AccountCurrencies.cpp
+++ b/src/rpc/handlers/AccountCurrencies.cpp
@@ -55,7 +55,7 @@ AccountCurrenciesHandler::process(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountInfo.cpp b/src/rpc/handlers/AccountInfo.cpp
index 8a99fa442..19d498661 100644
--- a/src/rpc/handlers/AccountInfo.cpp
+++ b/src/rpc/handlers/AccountInfo.cpp
@@ -69,7 +69,7 @@ AccountInfoHandler::process(AccountInfoHandler::Input const& input, Context cons
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountLines.cpp b/src/rpc/handlers/AccountLines.cpp
index be5a34581..b35ea267f 100644
--- a/src/rpc/handlers/AccountLines.cpp
+++ b/src/rpc/handlers/AccountLines.cpp
@@ -146,7 +146,7 @@ AccountLinesHandler::process(AccountLinesHandler::Input const& input, Context co
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountMPTokenIssuances.cpp b/src/rpc/handlers/AccountMPTokenIssuances.cpp
index 03f826362..efb203faa 100644
--- a/src/rpc/handlers/AccountMPTokenIssuances.cpp
+++ b/src/rpc/handlers/AccountMPTokenIssuances.cpp
@@ -128,7 +128,7 @@ AccountMPTokenIssuancesHandler::process(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountMPTokens.cpp b/src/rpc/handlers/AccountMPTokens.cpp
index 3c11e8a2a..06b16bc09 100644
--- a/src/rpc/handlers/AccountMPTokens.cpp
+++ b/src/rpc/handlers/AccountMPTokens.cpp
@@ -85,7 +85,7 @@ AccountMPTokensHandler::process(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountNFTs.cpp b/src/rpc/handlers/AccountNFTs.cpp
index 110341bff..5c5c33551 100644
--- a/src/rpc/handlers/AccountNFTs.cpp
+++ b/src/rpc/handlers/AccountNFTs.cpp
@@ -58,7 +58,7 @@ AccountNFTsHandler::process(AccountNFTsHandler::Input const& input, Context cons
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountObjects.cpp b/src/rpc/handlers/AccountObjects.cpp
index d5c79d94b..4ff2be946 100644
--- a/src/rpc/handlers/AccountObjects.cpp
+++ b/src/rpc/handlers/AccountObjects.cpp
@@ -59,7 +59,7 @@ AccountObjectsHandler::process(AccountObjectsHandler::Input const& input, Contex
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountOffers.cpp b/src/rpc/handlers/AccountOffers.cpp
index 4193741e5..e9884ede8 100644
--- a/src/rpc/handlers/AccountOffers.cpp
+++ b/src/rpc/handlers/AccountOffers.cpp
@@ -75,7 +75,7 @@ AccountOffersHandler::process(AccountOffersHandler::Input const& input, Context
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/AccountTx.cpp b/src/rpc/handlers/AccountTx.cpp
index 96cce79d1..12e8f9cb7 100644
--- a/src/rpc/handlers/AccountTx.cpp
+++ b/src/rpc/handlers/AccountTx.cpp
@@ -106,7 +106,7 @@ AccountTxHandler::process(AccountTxHandler::Input const& input, Context const& c
                 range->maxSequence
             );
 
-            if (!expectedLgrInfo.has_value())
+            if (not expectedLgrInfo.has_value())
                 return Error{expectedLgrInfo.error()};
 
             maxIndex = minIndex = expectedLgrInfo.value().seq;
diff --git a/src/rpc/handlers/BookChanges.cpp b/src/rpc/handlers/BookChanges.cpp
index a9d1d97fd..f14391b12 100644
--- a/src/rpc/handlers/BookChanges.cpp
+++ b/src/rpc/handlers/BookChanges.cpp
@@ -51,7 +51,7 @@ BookChangesHandler::process(BookChangesHandler::Input const& input, Context cons
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/BookOffers.cpp b/src/rpc/handlers/BookOffers.cpp
index bddbdec4e..e3c8cb181 100644
--- a/src/rpc/handlers/BookOffers.cpp
+++ b/src/rpc/handlers/BookOffers.cpp
@@ -59,7 +59,7 @@ BookOffersHandler::process(Input const& input, Context const& ctx) const
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/DepositAuthorized.cpp b/src/rpc/handlers/DepositAuthorized.cpp
index 65e24eb42..22edcb888 100644
--- a/src/rpc/handlers/DepositAuthorized.cpp
+++ b/src/rpc/handlers/DepositAuthorized.cpp
@@ -62,7 +62,7 @@ DepositAuthorizedHandler::process(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/Feature.cpp b/src/rpc/handlers/Feature.cpp
index c70b7ea72..8ba488728 100644
--- a/src/rpc/handlers/Feature.cpp
+++ b/src/rpc/handlers/Feature.cpp
@@ -63,7 +63,7 @@ FeatureHandler::process(FeatureHandler::Input const& input, Context const& ctx)
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/GatewayBalances.cpp b/src/rpc/handlers/GatewayBalances.cpp
index 5567b489a..5b4c82f22 100644
--- a/src/rpc/handlers/GatewayBalances.cpp
+++ b/src/rpc/handlers/GatewayBalances.cpp
@@ -69,7 +69,7 @@ GatewayBalancesHandler::process(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     // check account
diff --git a/src/rpc/handlers/GetAggregatePrice.cpp b/src/rpc/handlers/GetAggregatePrice.cpp
index 3f4023b4e..f84370781 100644
--- a/src/rpc/handlers/GetAggregatePrice.cpp
+++ b/src/rpc/handlers/GetAggregatePrice.cpp
@@ -71,7 +71,7 @@ GetAggregatePriceHandler::process(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/Ledger.cpp b/src/rpc/handlers/Ledger.cpp
index 13609577c..f4a31a08e 100644
--- a/src/rpc/handlers/Ledger.cpp
+++ b/src/rpc/handlers/Ledger.cpp
@@ -58,7 +58,7 @@ LedgerHandler::process(LedgerHandler::Input const& input, Context const& ctx) co
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/LedgerData.cpp b/src/rpc/handlers/LedgerData.cpp
index 45a47efb7..2bed4e384 100644
--- a/src/rpc/handlers/LedgerData.cpp
+++ b/src/rpc/handlers/LedgerData.cpp
@@ -69,7 +69,7 @@ LedgerDataHandler::process(Input const& input, Context const& ctx) const
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/LedgerEntry.cpp b/src/rpc/handlers/LedgerEntry.cpp
index b6bd14b70..8468b7c6a 100644
--- a/src/rpc/handlers/LedgerEntry.cpp
+++ b/src/rpc/handlers/LedgerEntry.cpp
@@ -252,7 +252,7 @@ LedgerEntryHandler::process(LedgerEntryHandler::Input const& input, Context cons
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/MPTHolders.cpp b/src/rpc/handlers/MPTHolders.cpp
index bec6fa63e..b3507043a 100644
--- a/src/rpc/handlers/MPTHolders.cpp
+++ b/src/rpc/handlers/MPTHolders.cpp
@@ -56,7 +56,7 @@ MPTHoldersHandler::process(MPTHoldersHandler::Input const& input, Context const&
     auto const expectedLgrInfo = getLedgerHeaderFromHashOrSeq(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/NFTHistory.cpp b/src/rpc/handlers/NFTHistory.cpp
index 583ba24de..6ca0f5a99 100644
--- a/src/rpc/handlers/NFTHistory.cpp
+++ b/src/rpc/handlers/NFTHistory.cpp
@@ -87,7 +87,7 @@ NFTHistoryHandler::process(NFTHistoryHandler::Input const& input, Context const&
             *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
         );
 
-        if (!expectedLgrInfo.has_value())
+        if (not expectedLgrInfo.has_value())
             return Error{expectedLgrInfo.error()};
 
         maxIndex = minIndex = expectedLgrInfo.value().seq;
diff --git a/src/rpc/handlers/NFTInfo.cpp b/src/rpc/handlers/NFTInfo.cpp
index 636a7ba36..5371d5e74 100644
--- a/src/rpc/handlers/NFTInfo.cpp
+++ b/src/rpc/handlers/NFTInfo.cpp
@@ -54,7 +54,7 @@ NFTInfoHandler::process(NFTInfoHandler::Input const& input, Context const& ctx)
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/NFTOffersCommon.cpp b/src/rpc/handlers/NFTOffersCommon.cpp
index 6be78ee2d..b02825816 100644
--- a/src/rpc/handlers/NFTOffersCommon.cpp
+++ b/src/rpc/handlers/NFTOffersCommon.cpp
@@ -97,7 +97,7 @@ NFTOffersHandlerBase::iterateOfferDirectory(
         *sharedPtrBackend_, yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/NFTsByIssuer.cpp b/src/rpc/handlers/NFTsByIssuer.cpp
index fc0b03435..43329f4e7 100644
--- a/src/rpc/handlers/NFTsByIssuer.cpp
+++ b/src/rpc/handlers/NFTsByIssuer.cpp
@@ -55,7 +55,7 @@ NFTsByIssuerHandler::process(NFTsByIssuerHandler::Input const& input, Context co
     auto const expectedLgrInfo = getLedgerHeaderFromHashOrSeq(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/NoRippleCheck.cpp b/src/rpc/handlers/NoRippleCheck.cpp
index 4a1a20c3a..6068cf122 100644
--- a/src/rpc/handlers/NoRippleCheck.cpp
+++ b/src/rpc/handlers/NoRippleCheck.cpp
@@ -65,7 +65,7 @@ NoRippleCheckHandler::process(NoRippleCheckHandler::Input const& input, Context
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto const& lgrInfo = expectedLgrInfo.value();
diff --git a/src/rpc/handlers/TransactionEntry.cpp b/src/rpc/handlers/TransactionEntry.cpp
index 828343b05..69372bd85 100644
--- a/src/rpc/handlers/TransactionEntry.cpp
+++ b/src/rpc/handlers/TransactionEntry.cpp
@@ -52,7 +52,7 @@ TransactionEntryHandler::process(
         *sharedPtrBackend_, ctx.yield, input.ledgerHash, input.ledgerIndex, range->maxSequence
     );
 
-    if (!expectedLgrInfo.has_value())
+    if (not expectedLgrInfo.has_value())
         return Error{expectedLgrInfo.error()};
 
     auto output = TransactionEntryHandler::Output{};