diff --git a/include/xrpl/protocol/SField.h b/include/xrpl/protocol/SField.h
index a86c8e9640..035735c513 100644
--- a/include/xrpl/protocol/SField.h
+++ b/include/xrpl/protocol/SField.h
@@ -49,13 +49,14 @@ template <int>
 class STBitString;
 template <class>
 class STInteger;
-template <class>
-class STTypedInteger;
 class STNumber;
 class STXChainBridge;
 class STVector256;
 class STCurrency;
 
+template <class Integer>
+concept HasValue = requires(Integer i) { i.value(); };
+
 #pragma push_macro("XMACRO")
 #undef XMACRO
 
@@ -366,8 +367,8 @@ using SF_UINT512 = TypedField<STBitString<512>>;
 // The tag is only applied when deserialized.
 //
 // Tenth of a basis point values:
-using SF_TENTHBIPS16 = TypedField<STTypedInteger<TenthBips16>>;
-using SF_TENTHBIPS32 = TypedField<STTypedInteger<TenthBips32>>;
+using SF_TENTHBIPS16 = TypedField<STInteger<TenthBips16>>;
+using SF_TENTHBIPS32 = TypedField<STInteger<TenthBips32>>;
 
 using SF_ACCOUNT = TypedField<STAccount>;
 using SF_AMOUNT = TypedField<STAmount>;
diff --git a/include/xrpl/protocol/STExchange.h b/include/xrpl/protocol/STExchange.h
index 9ecb56376c..dba8bf3efb 100644
--- a/include/xrpl/protocol/STExchange.h
+++ b/include/xrpl/protocol/STExchange.h
@@ -62,22 +62,22 @@ struct STExchange<STInteger<U>, T>
 };
 
 template <class U, class T>
-struct STExchange<STTypedInteger<U>, T>
+struct STExchange<STInteger<TenthBips<U>>, T>
 {
     explicit STExchange() = default;
 
-    using value_type = U;
+    using value_type = TenthBips<U>;
 
     static void
-    get(std::optional<T>& t, STTypedInteger<U> const& u)
+    get(std::optional<T>& t, STInteger<value_type> const& u)
     {
         t = u.value();
     }
 
-    static std::unique_ptr<STInteger<U>>
+    static std::unique_ptr<STInteger<value_type>>
     set(SField const& f, T const& t)
     {
-        return std::make_unique<STTypedInteger<U>>(f, t);
+        return std::make_unique<STInteger<value_type>>(f, t);
     }
 };
 
diff --git a/include/xrpl/protocol/STInteger.h b/include/xrpl/protocol/STInteger.h
index d914566f56..c04131d4a5 100644
--- a/include/xrpl/protocol/STInteger.h
+++ b/include/xrpl/protocol/STInteger.h
@@ -37,7 +37,7 @@ private:
 
 public:
     explicit STInteger(Integer v);
-    STInteger(SField const& n, Integer v = 0);
+    STInteger(SField const& n, Integer v = {});
     STInteger(SerialIter& sit, SField const& name);
 
     SerializedTypeID
@@ -82,42 +82,9 @@ using STUInt16 = STInteger<std::uint16_t>;
 using STUInt32 = STInteger<std::uint32_t>;
 using STUInt64 = STInteger<std::uint64_t>;
 
-template <class TypedInteger>
-class STTypedInteger : public STInteger<typename TypedInteger::value_type>,
-                       public CountedObject<STTypedInteger<TypedInteger>>
-{
-public:
-    using value_type = TypedInteger;
-    using base_value_type = TypedInteger::value_type;
-    using base = STInteger<base_value_type>;
-
-public:
-    using base::add;
-    using base::getJson;
-    using base::getSType;
-    using base::getText;
-    using base::isDefault;
-    using base::isEquivalent;
-    using base::STInteger;
-
-    SerializedTypeID
-    getSType() const override;
-
-    STTypedInteger&
-    operator=(value_type const& v);
-
-    value_type
-    value() const noexcept;
-
-    void
-    setValue(TypedInteger v);
-
-    operator TypedInteger() const;
-};
-
 // Tenth of a basis point values:
-using STTenthBips16 = STTypedInteger<TenthBips16>;
-using STTenthBips32 = STTypedInteger<TenthBips32>;
+using STTenthBips16 = STInteger<TenthBips16>;
+using STTenthBips32 = STInteger<TenthBips32>;
 
 template <typename Integer>
 inline STInteger<Integer>::STInteger(Integer v) : value_(v)
@@ -199,34 +166,6 @@ inline STInteger<Integer>::operator Integer() const
     return value_;
 }
 
-template <typename TypedInteger>
-inline STTypedInteger<TypedInteger>&
-STTypedInteger<TypedInteger>::operator=(value_type const& v)
-{
-    base::setValue(v.value());
-    return *this;
-}
-
-template <typename TypedInteger>
-inline typename STTypedInteger<TypedInteger>::value_type
-STTypedInteger<TypedInteger>::value() const noexcept
-{
-    return value_type(base::value());
-}
-
-template <typename TypedInteger>
-inline void
-STTypedInteger<TypedInteger>::setValue(TypedInteger v)
-{
-    base::setValue(v.value());
-}
-
-template <typename TypedInteger>
-inline STTypedInteger<TypedInteger>::operator TypedInteger() const
-{
-    return TypedInteger(base::value());
-}
-
 }  // namespace ripple
 
 #endif
diff --git a/include/xrpl/protocol/Serializer.h b/include/xrpl/protocol/Serializer.h
index 5724a19f57..ec0fd75af1 100644
--- a/include/xrpl/protocol/Serializer.h
+++ b/include/xrpl/protocol/Serializer.h
@@ -125,8 +125,17 @@ public:
     }
 
     template <typename Integer>
+        requires(!HasValue<Integer>)
     int addInteger(Integer);
 
+    template <typename Integer>
+        requires HasValue<Integer>
+    int
+    addInteger(Integer i)
+    {
+        return addInteger(i.value());
+    }
+
     template <std::size_t Bits, class Tag>
     int
     addBitString(base_uint<Bits, Tag> const& v)
diff --git a/include/xrpl/protocol/Units.h b/include/xrpl/protocol/Units.h
index 20051b0c63..1788456edb 100644
--- a/include/xrpl/protocol/Units.h
+++ b/include/xrpl/protocol/Units.h
@@ -592,6 +592,17 @@ safe_cast(Src s) noexcept
     return Dest{safe_cast<typename Dest::value_type>(s.value())};
 }
 
+template <class Dest, class Src>
+constexpr std::enable_if_t<
+    std::is_integral_v<typename Dest::value_type> &&
+        std::is_integral_v<typename Src>,
+    Dest>
+safe_cast(Src s) noexcept
+{
+    // Dest may not have an explicit value constructor
+    return Dest{safe_cast<typename Dest::value_type>(s)};
+}
+
 template <class Dest, class Src>
 constexpr std::enable_if_t<
     std::is_same_v<typename Dest::unit_type, typename Src::unit_type> &&
@@ -604,6 +615,17 @@ unsafe_cast(Src s) noexcept
     return Dest{unsafe_cast<typename Dest::value_type>(s.value())};
 }
 
+template <class Dest, class Src>
+constexpr std::enable_if_t<
+    std::is_integral_v<typename Dest::value_type> &&
+        std::is_integral_v<typename Src>,
+    Dest>
+unsafe_cast(Src s) noexcept
+{
+    // Dest may not have an explicit value constructor
+    return Dest{unsafe_cast<typename Dest::value_type>(s)};
+}
+
 }  // namespace ripple
 
 #endif  // PROTOCOL_UNITS_H_INCLUDED
diff --git a/src/libxrpl/protocol/STInteger.cpp b/src/libxrpl/protocol/STInteger.cpp
index 346702925b..d48c0f8f53 100644
--- a/src/libxrpl/protocol/STInteger.cpp
+++ b/src/libxrpl/protocol/STInteger.cpp
@@ -229,18 +229,62 @@ STUInt64::getJson(JsonOptions) const
     return convertToString(value_, 16);  // Convert to base 16
 }
 
+//------------------------------------------------------------------------------
+
+template <>
+STTenthBips16::STInteger(SerialIter& sit, SField const& name)
+    : STInteger(name, TenthBips16(sit.get16()))
+{
+}
+
 template <>
 SerializedTypeID
-STTenthBips16::getSType() const override
+STTenthBips16::getSType() const
 {
     return STI_TENTHBIPS16;
 }
 
+template <>
+std::string
+STTenthBips16::getText() const
+{
+    return std::to_string(value_.value());
+}
+
+template <>
+Json::Value
+STTenthBips16::getJson(JsonOptions) const
+{
+    return value_.value();
+}
+
+//------------------------------------------------------------------------------
+
+template <>
+STTenthBips32::STInteger(SerialIter& sit, SField const& name)
+    : STInteger(name, TenthBips32(sit.get32()))
+{
+}
+
 template <>
 SerializedTypeID
-STTenthBips32::getSType() const override
+STTenthBips32::getSType() const
 {
     return STI_TENTHBIPS32;
 }
 
+template <>
+std::string
+STTenthBips32::getText() const
+{
+    return std::to_string(value_.value());
+}
+
+template <>
+Json::Value
+STTenthBips32::getJson(JsonOptions) const
+{
+    return value_.value();
+}
+
 }  // namespace ripple
diff --git a/src/libxrpl/protocol/STParsedJSON.cpp b/src/libxrpl/protocol/STParsedJSON.cpp
index e11448ccda..4a9eaf82ab 100644
--- a/src/libxrpl/protocol/STParsedJSON.cpp
+++ b/src/libxrpl/protocol/STParsedJSON.cpp
@@ -82,6 +82,31 @@ constexpr std::
     return static_cast<U1>(value);
 }
 
+template <typename U, typename S>
+    requires HasValue<U>
+constexpr std::enable_if_t<
+    std::is_unsigned<typename U::value_type>::value && std::is_signed<S>::value,
+    U>
+to_unsigned(S value)
+{
+    if (value < 0 || std::numeric_limits<typename U::value_type>::max() < value)
+        Throw<std::runtime_error>("Value out of range");
+    return safe_cast<U>(static_cast<typename U::value_type>(value));
+}
+
+template <typename U1, typename U2>
+    requires HasValue<U1>
+constexpr std::enable_if_t<
+    std::is_unsigned<typename U1::value_type>::value &&
+        std::is_unsigned<U2>::value,
+    U1>
+to_unsigned(U2 value)
+{
+    if (std::numeric_limits<typename U1::value_type>::max() < value)
+        Throw<std::runtime_error>("Value out of range");
+    return safe_cast<U1>(static_cast<typename U1::value_type>(value));
+}
+
 static std::string
 make_name(std::string const& object, std::string const& field)
 {
@@ -201,6 +226,119 @@ non_object_in_array(std::string const& item, Json::UInt index)
             " is not an object.  Arrays may only contain objects.");
 }
 
+template <class STResult, class Integer>
+static std::optional<detail::STVar>
+parseUnsigned(
+    SField const& field,
+    std::string const& json_name,
+    std::string const& fieldName,
+    SField const* name,
+    Json::Value const& value,
+    Json::Value& error)
+{
+    std::optional<detail::STVar> ret;
+
+    try
+    {
+        if (value.isString())
+        {
+            ret = detail::make_stvar<STResult>(
+                field,
+                safe_cast<typename STResult::value_type>(
+                    beast::lexicalCastThrow<Integer>(value.asString())));
+        }
+        else if (value.isInt())
+        {
+            ret = detail::make_stvar<STResult>(
+                field,
+                to_unsigned<typename STResult::value_type>(value.asInt()));
+        }
+        else if (value.isUInt())
+        {
+            ret = detail::make_stvar<STResult>(
+                field,
+                to_unsigned<typename STResult::value_type>(value.asUInt()));
+        }
+        else
+        {
+            error = bad_type(json_name, fieldName);
+            return ret;
+        }
+    }
+    catch (std::exception const&)
+    {
+        error = invalid_data(json_name, fieldName);
+        return ret;
+    }
+
+    return ret;
+}
+
+template <class STResult>
+static std::optional<detail::STVar>
+parseUint16(
+    SField const& field,
+    std::string const& json_name,
+    std::string const& fieldName,
+    SField const* name,
+    Json::Value const& value,
+    Json::Value& error)
+{
+    std::optional<detail::STVar> ret;
+
+    try
+    {
+        if (value.isString())
+        {
+            std::string const strValue = value.asString();
+
+            if (!strValue.empty() &&
+                ((strValue[0] < '0') || (strValue[0] > '9')))
+            {
+                if (field == sfTransactionType)
+                {
+                    ret = detail::make_stvar<STResult>(
+                        field,
+                        safe_cast<typename STResult::value_type>(
+                            static_cast<std::uint16_t>(
+                                TxFormats::getInstance().findTypeByName(
+                                    strValue))));
+
+                    if (*name == sfGeneric)
+                        name = &sfTransaction;
+                }
+                else if (field == sfLedgerEntryType)
+                {
+                    ret = detail::make_stvar<STResult>(
+                        field,
+                        safe_cast<typename STResult::value_type>(
+                            static_cast<std::uint16_t>(
+                                LedgerFormats::getInstance().findTypeByName(
+                                    strValue))));
+
+                    if (*name == sfGeneric)
+                        name = &sfLedgerEntry;
+                }
+                else
+                {
+                    error = invalid_data(json_name, fieldName);
+                    return ret;
+                }
+            }
+        }
+        if (!ret)
+            return parseUnsigned<STResult, std::uint16_t>(
+                field, json_name, fieldName, name, value, error);
+    }
+    catch (std::exception const&)
+    {
+        error = invalid_data(json_name, fieldName);
+        return ret;
+    }
+
+    return ret;
+}
+
 // This function is used by parseObject to parse any JSON type that doesn't
 // recurse.  Everything represented here is a leaf-type.
 static std::optional<detail::STVar>
@@ -301,105 +439,34 @@ parseLeaf(
             break;
 
         case STI_UINT16:
-            try
-            {
-                if (value.isString())
-                {
-                    std::string const strValue = value.asString();
-
-                    if (!strValue.empty() &&
-                        ((strValue[0] < '0') || (strValue[0] > '9')))
-                    {
-                        if (field == sfTransactionType)
-                        {
-                            ret = detail::make_stvar<STUInt16>(
-                                field,
-                                static_cast<std::uint16_t>(
-                                    TxFormats::getInstance().findTypeByName(
-                                        strValue)));
-
-                            if (*name == sfGeneric)
-                                name = &sfTransaction;
-                        }
-                        else if (field == sfLedgerEntryType)
-                        {
-                            ret = detail::make_stvar<STUInt16>(
-                                field,
-                                static_cast<std::uint16_t>(
-                                    LedgerFormats::getInstance().findTypeByName(
-                                        strValue)));
-
-                            if (*name == sfGeneric)
-                                name = &sfLedgerEntry;
-                        }
-                        else
-                        {
-                            error = invalid_data(json_name, fieldName);
-                            return ret;
-                        }
-                    }
-                    else
-                    {
-                        ret = detail::make_stvar<STUInt16>(
-                            field,
-                            beast::lexicalCastThrow<std::uint16_t>(strValue));
-                    }
-                }
-                else if (value.isInt())
-                {
-                    ret = detail::make_stvar<STUInt16>(
-                        field, to_unsigned<std::uint16_t>(value.asInt()));
-                }
-                else if (value.isUInt())
-                {
-                    ret = detail::make_stvar<STUInt16>(
-                        field, to_unsigned<std::uint16_t>(value.asUInt()));
-                }
-                else
-                {
-                    error = bad_type(json_name, fieldName);
-                    return ret;
-                }
-            }
-            catch (std::exception const&)
-            {
-                error = invalid_data(json_name, fieldName);
+            ret = parseUint16<STUInt16>(
+                field, json_name, fieldName, name, value, error);
+            if (!ret)
+                return ret;
+
+            break;
+
+        case STI_TENTHBIPS16:
+            ret = parseUnsigned<STTenthBips16, std::uint16_t>(
+                field, json_name, fieldName, name, value, error);
+            if (!ret)
                 return ret;
-            }
 
             break;
 
         case STI_UINT32:
-            try
-            {
-                if (value.isString())
-                {
-                    ret = detail::make_stvar<STUInt32>(
-                        field,
-                        beast::lexicalCastThrow<std::uint32_t>(
-                            value.asString()));
-                }
-                else if (value.isInt())
-                {
-                    ret = detail::make_stvar<STUInt32>(
-                        field, to_unsigned<std::uint32_t>(value.asInt()));
-                }
-                else if (value.isUInt())
-                {
-                    ret = detail::make_stvar<STUInt32>(
-                        field, safe_cast<std::uint32_t>(value.asUInt()));
-                }
-                else
-                {
-                    error = bad_type(json_name, fieldName);
-                    return ret;
-                }
-            }
-            catch (std::exception const&)
-            {
-                error = invalid_data(json_name, fieldName);
+            ret = parseUnsigned<STUInt32, std::uint32_t>(
+                field, json_name, fieldName, name, value, error);
+            if (!ret)
+                return ret;
+
+            break;
+
+        case STI_TENTHBIPS32:
+            ret = parseUnsigned<STTenthBips32, std::uint32_t>(
+                field, json_name, fieldName, name, value, error);
+            if (!ret)
                 return ret;
-            }
 
             break;
 
diff --git a/src/test/rpc/Simulate_test.cpp b/src/test/rpc/Simulate_test.cpp
index 943065ac41..f27f0c2915 100644
--- a/src/test/rpc/Simulate_test.cpp
+++ b/src/test/rpc/Simulate_test.cpp
@@ -805,7 +805,7 @@ class Simulate_test : public beast::unit_test::suite
             testTx(env, tx, testSimulation);
 
             tx[sfSigningPubKey] = "";
-            tx[sfTxnSignature] = "x";
+            tx[sfTxnSignature] = "";
             tx[sfSequence] = env.seq(env.master);
             tx[sfFee] = env.current()->fees().base.jsonClipped().asString();