Revert "Implement Lending Protocol (unsupported) (#5270)"

This reverts commit 6c67f1f.

Author: ximinez

include/xrpl/basics/Number.h

@@ -13,15 +13,6 @@ class Number;
 std::string
 to_string(Number const& amount);
 
-template <typename T>
-constexpr bool
-isPowerOfTen(T value)
-{
-    while (value >= 10 && value % 10 == 0)
-        value /= 10;
-    return value == 1;
-}
-
 class Number
 {
     using rep = std::int64_t;
@@ -31,9 +22,7 @@ class Number
 public:
     // The range for the mantissa when normalized
     constexpr static std::int64_t minMantissa = 1'000'000'000'000'000LL;
-    static_assert(isPowerOfTen(minMantissa));
-    constexpr static std::int64_t maxMantissa = minMantissa * 10 - 1;
-    static_assert(maxMantissa == 9'999'999'999'999'999LL);
+    constexpr static std::int64_t maxMantissa = 9'999'999'999'999'999LL;
 
     // The range for the exponent when normalized
     constexpr static int minExponent = -32768;
@@ -143,7 +132,22 @@ class Number
     }
 
     Number
-    truncate() const noexcept;
+    truncate() const noexcept
+    {
+        if (exponent_ >= 0 || mantissa_ == 0)
+            return *this;
+
+        Number ret = *this;
+        while (ret.exponent_ < 0 && ret.mantissa_ != 0)
+        {
+            ret.exponent_ += 1;
+            ret.mantissa_ /= rep(10);
+        }
+        // We are guaranteed that normalize() will never throw an exception
+        // because exponent is either negative or zero at this point.
+        ret.normalize();
+        return ret;
+    }
 
     friend constexpr bool
     operator>(Number const& x, Number const& y) noexcept
@@ -188,8 +192,6 @@ class Number
     class Guard;
 };
 
-constexpr static Number numZero{};
-
 inline constexpr Number::Number(rep mantissa, int exponent, unchecked) noexcept
     : mantissa_{mantissa}, exponent_{exponent}
 {

include/xrpl/beast/utility/instrumentation.h

@@ -13,7 +13,7 @@
 // The duplication is because Visual Studio 2019 cannot compile that header
 // even with the option -Zc:__cplusplus added.
 #define ALWAYS(cond, message, ...) assert((message) && (cond))
-#define ALWAYS_OR_UNREACHABLE(cond, message) assert((message) && (cond))
+#define ALWAYS_OR_UNREACHABLE(cond, message, ...) assert((message) && (cond))
 #define SOMETIMES(cond, message, ...)
 #define REACHABLE(message, ...)
 #define UNREACHABLE(message, ...) assert((message) && false)

include/xrpl/json/json_value.h

@@ -381,9 +381,6 @@ class Value
     /// Return true if the object has a member named key.
     bool
     isMember(std::string const& key) const;
-    /// Return true if the object has a member named key.
-    bool
-    isMember(StaticString const& key) const;
 
     /// \brief Return a list of the member names.
     ///

include/xrpl/ledger/ApplyView.h

@@ -368,45 +368,6 @@ class ApplyView : public ReadView
     emptyDirDelete(Keylet const& directory);
 };
 
-namespace directory {
-/** Helper functions for managing low-level directory operations.
-    These are not part of the ApplyView interface.
-
-    Don't use them unless you really, really know what you're doing.
-    Instead use dirAdd, dirInsert, etc.
- */
-
-std::uint64_t
-createRoot(
-    ApplyView& view,
-    Keylet const& directory,
-    uint256 const& key,
-    std::function<void(std::shared_ptr<SLE> const&)> const& describe);
-
-auto
-findPreviousPage(ApplyView& view, Keylet const& directory, SLE::ref start);
-
-std::uint64_t
-insertKey(
-    ApplyView& view,
-    SLE::ref node,
-    std::uint64_t page,
-    bool preserveOrder,
-    STVector256& indexes,
-    uint256 const& key);
-
-std::optional<std::uint64_t>
-insertPage(
-    ApplyView& view,
-    std::uint64_t page,
-    SLE::pointer node,
-    std::uint64_t nextPage,
-    SLE::ref next,
-    uint256 const& key,
-    Keylet const& directory,
-    std::function<void(std::shared_ptr<SLE> const&)> const& describe);
-
-}  // namespace directory
 }  // namespace ripple
 
 #endif