diff --git a/src/libxrpl/tx/PreflightHelpers.h b/src/libxrpl/tx/PreflightHelpers.h
index 3ee665e490..a1f3f272b0 100644
--- a/src/libxrpl/tx/PreflightHelpers.h
+++ b/src/libxrpl/tx/PreflightHelpers.h
@@ -45,14 +45,14 @@ isZeroId(T const& id)
 
 // Checks whether an amount is a strictly positive XRP amount.
 inline bool
-checkPositiveXRPAmount(xrpl::STAmount const& amount)
+isPositiveXRPAmount(xrpl::STAmount const& amount)
 {
     return xrpl::isXRP(amount) && amount > beast::kZero;
 }
 
 // Checks whether an amount (of any asset type) is strictly positive.
 inline bool
-checkPositiveAmount(xrpl::STAmount const& amount)
+isPositiveAmount(xrpl::STAmount const& amount)
 {
     return amount > beast::kZero;
 }
diff --git a/src/libxrpl/tx/transactors/escrow/EscrowCreate.cpp b/src/libxrpl/tx/transactors/escrow/EscrowCreate.cpp
index 7979e69ec7..498f9fd692 100644
--- a/src/libxrpl/tx/transactors/escrow/EscrowCreate.cpp
+++ b/src/libxrpl/tx/transactors/escrow/EscrowCreate.cpp
@@ -102,7 +102,7 @@ NotTEC
 escrowCreatePreflightHelper<Issue>(PreflightContext const& ctx)
 {
     STAmount const amount = ctx.tx[sfAmount];
-    if (amount.native() || !checkPositiveAmount(amount))
+    if (amount.native() || !isPositiveAmount(amount))
         return temBAD_AMOUNT;
 
     if (isBadCurrency(amount.get<Issue>().currency))
@@ -119,8 +119,7 @@ escrowCreatePreflightHelper<MPTIssue>(PreflightContext const& ctx)
         return temDISABLED;
 
     auto const amount = ctx.tx[sfAmount];
-    if (amount.native() || amount.mpt() > MPTAmount{kMaxMpTokenAmount} ||
-        !checkPositiveAmount(amount))
+    if (amount.native() || amount.mpt() > MPTAmount{kMaxMpTokenAmount} || !isPositiveAmount(amount))
         return temBAD_AMOUNT;
 
     return tesSUCCESS;
@@ -143,7 +142,7 @@ EscrowCreate::preflight(PreflightContext const& ctx)
     }
     else
     {
-        if (!checkPositiveXRPAmount(amount))
+        if (!isPositiveXRPAmount(amount))
             return temBAD_AMOUNT;
     }
 
diff --git a/src/libxrpl/tx/transactors/lending/LoanBrokerCoverDeposit.cpp b/src/libxrpl/tx/transactors/lending/LoanBrokerCoverDeposit.cpp
index a605734d5c..94682fc8e7 100644
--- a/src/libxrpl/tx/transactors/lending/LoanBrokerCoverDeposit.cpp
+++ b/src/libxrpl/tx/transactors/lending/LoanBrokerCoverDeposit.cpp
@@ -33,7 +33,7 @@ LoanBrokerCoverDeposit::preflight(PreflightContext const& ctx)
         return temINVALID;
 
     auto const dstAmount = ctx.tx[sfAmount];
-    if (!checkPositiveAmount(dstAmount))
+    if (!isPositiveAmount(dstAmount))
         return temBAD_AMOUNT;
 
     if (!isLegalNet(dstAmount))
diff --git a/src/libxrpl/tx/transactors/lending/LoanBrokerCoverWithdraw.cpp b/src/libxrpl/tx/transactors/lending/LoanBrokerCoverWithdraw.cpp
index 2186f194c9..406953f940 100644
--- a/src/libxrpl/tx/transactors/lending/LoanBrokerCoverWithdraw.cpp
+++ b/src/libxrpl/tx/transactors/lending/LoanBrokerCoverWithdraw.cpp
@@ -36,7 +36,7 @@ LoanBrokerCoverWithdraw::preflight(PreflightContext const& ctx)
         return temINVALID;
 
     auto const dstAmount = ctx.tx[sfAmount];
-    if (!checkPositiveAmount(dstAmount))
+    if (!isPositiveAmount(dstAmount))
         return temBAD_AMOUNT;
 
     if (!isLegalNet(dstAmount))
diff --git a/src/libxrpl/tx/transactors/lending/LoanPay.cpp b/src/libxrpl/tx/transactors/lending/LoanPay.cpp
index 0062ef6092..b19889733f 100644
--- a/src/libxrpl/tx/transactors/lending/LoanPay.cpp
+++ b/src/libxrpl/tx/transactors/lending/LoanPay.cpp
@@ -53,7 +53,7 @@ LoanPay::preflight(PreflightContext const& ctx)
     if (isZeroId(ctx.tx[sfLoanID]))
         return temINVALID;
 
-    if (!checkPositiveAmount(ctx.tx[sfAmount]))
+    if (!isPositiveAmount(ctx.tx[sfAmount]))
         return temBAD_AMOUNT;
 
     // The loan payment flags are all mutually exclusive. If more than one is
diff --git a/src/libxrpl/tx/transactors/payment/Payment.cpp b/src/libxrpl/tx/transactors/payment/Payment.cpp
index b67742490e..932e04af1e 100644
--- a/src/libxrpl/tx/transactors/payment/Payment.cpp
+++ b/src/libxrpl/tx/transactors/payment/Payment.cpp
@@ -185,13 +185,13 @@ Payment::preflight(PreflightContext const& ctx)
                         << "Payment destination account not specified.";
         return temDST_NEEDED;
     }
-    if (hasMax && !checkPositiveAmount(maxSourceAmount))
+    if (hasMax && !isPositiveAmount(maxSourceAmount))
     {
         JLOG(j.trace()) << "Malformed transaction: bad max amount: "
                         << maxSourceAmount.getFullText();
         return temBAD_AMOUNT;
     }
-    if (!checkPositiveAmount(dstAmount))
+    if (!isPositiveAmount(dstAmount))
     {
         JLOG(j.trace()) << "Malformed transaction: bad dst amount: " << dstAmount.getFullText();
         return temBAD_AMOUNT;
diff --git a/src/libxrpl/tx/transactors/payment_channel/PaymentChannelClaim.cpp b/src/libxrpl/tx/transactors/payment_channel/PaymentChannelClaim.cpp
index 0e9042a51c..dd7acb85a4 100644
--- a/src/libxrpl/tx/transactors/payment_channel/PaymentChannelClaim.cpp
+++ b/src/libxrpl/tx/transactors/payment_channel/PaymentChannelClaim.cpp
@@ -48,11 +48,11 @@ PaymentChannelClaim::preflight(PreflightContext const& ctx)
         return temMALFORMED;
 
     auto const bal = ctx.tx[~sfBalance];
-    if (bal && !checkPositiveXRPAmount(*bal))
+    if (bal && !isPositiveXRPAmount(*bal))
         return temBAD_AMOUNT;
 
     auto const amt = ctx.tx[~sfAmount];
-    if (amt && !checkPositiveXRPAmount(*amt))
+    if (amt && !isPositiveXRPAmount(*amt))
         return temBAD_AMOUNT;
 
     if (bal && amt && *bal > *amt)
diff --git a/src/libxrpl/tx/transactors/payment_channel/PaymentChannelCreate.cpp b/src/libxrpl/tx/transactors/payment_channel/PaymentChannelCreate.cpp
index 7c04613b27..e06997b6ed 100644
--- a/src/libxrpl/tx/transactors/payment_channel/PaymentChannelCreate.cpp
+++ b/src/libxrpl/tx/transactors/payment_channel/PaymentChannelCreate.cpp
@@ -58,7 +58,7 @@ PaymentChannelCreate::makeTxConsequences(PreflightContext const& ctx)
 NotTEC
 PaymentChannelCreate::preflight(PreflightContext const& ctx)
 {
-    if (!checkPositiveXRPAmount(ctx.tx[sfAmount]))
+    if (!isPositiveXRPAmount(ctx.tx[sfAmount]))
         return temBAD_AMOUNT;
 
     if (ctx.tx[sfAccount] == ctx.tx[sfDestination])
diff --git a/src/libxrpl/tx/transactors/payment_channel/PaymentChannelFund.cpp b/src/libxrpl/tx/transactors/payment_channel/PaymentChannelFund.cpp
index 51fd977d1d..ffaba363ea 100644
--- a/src/libxrpl/tx/transactors/payment_channel/PaymentChannelFund.cpp
+++ b/src/libxrpl/tx/transactors/payment_channel/PaymentChannelFund.cpp
@@ -35,7 +35,7 @@ PaymentChannelFund::preflight(PreflightContext const& ctx)
     if (ctx.rules.enabled(fixCleanup3_2_0) && isZeroId(ctx.tx[sfChannel]))
         return temMALFORMED;
 
-    if (!checkPositiveXRPAmount(ctx.tx[sfAmount]))
+    if (!isPositiveXRPAmount(ctx.tx[sfAmount]))
         return temBAD_AMOUNT;
 
     return tesSUCCESS;
diff --git a/src/libxrpl/tx/transactors/token/Clawback.cpp b/src/libxrpl/tx/transactors/token/Clawback.cpp
index 82e5e60509..23c0995b12 100644
--- a/src/libxrpl/tx/transactors/token/Clawback.cpp
+++ b/src/libxrpl/tx/transactors/token/Clawback.cpp
@@ -46,7 +46,7 @@ preflightHelper<Issue>(PreflightContext const& ctx)
     // The issuer field is used for the token holder instead
     AccountID const& holder = clawAmount.getIssuer();
 
-    if (issuer == holder || isXRP(clawAmount) || !checkPositiveAmount(clawAmount))
+    if (issuer == holder || isXRP(clawAmount) || !isPositiveAmount(clawAmount))
         return temBAD_AMOUNT;
 
     return tesSUCCESS;
@@ -69,7 +69,7 @@ preflightHelper<MPTIssue>(PreflightContext const& ctx)
     if (ctx.tx[sfAccount] == *mptHolder)
         return temMALFORMED;
 
-    if (clawAmount.mpt() > MPTAmount{kMaxMpTokenAmount} || !checkPositiveAmount(clawAmount))
+    if (clawAmount.mpt() > MPTAmount{kMaxMpTokenAmount} || !isPositiveAmount(clawAmount))
         return temBAD_AMOUNT;
 
     return tesSUCCESS;
diff --git a/src/libxrpl/tx/transactors/vault/VaultWithdraw.cpp b/src/libxrpl/tx/transactors/vault/VaultWithdraw.cpp
index b2935b6693..f39063f432 100644
--- a/src/libxrpl/tx/transactors/vault/VaultWithdraw.cpp
+++ b/src/libxrpl/tx/transactors/vault/VaultWithdraw.cpp
@@ -50,7 +50,7 @@ VaultWithdraw::preflight(PreflightContext const& ctx)
         return temMALFORMED;
     }
 
-    if (!checkPositiveAmount(ctx.tx[sfAmount]))
+    if (!isPositiveAmount(ctx.tx[sfAmount]))
         return temBAD_AMOUNT;
 
     if (auto const destination = ctx.tx[~sfDestination])