Start fixing the AMMExtended tests

src/test/app/AMMExtended_test.cpp

@@ -26,6 +26,9 @@ namespace test {
  */
 struct AMMExtended_test : public jtx::AMMTest
 {
+    // Use small Number mantissas for the life of this test.
+    NumberMantissaScaleGuard const sg_{ripple::MantissaRange::small};
+
 private:
     void
     testRmFundedOffer(FeatureBitset features)
@@ -42,6 +45,11 @@ private:
         // funded and not used for the payment.
 
         using namespace jtx;
+        // For now, just disable SAV entirely, which locks in the small Number
+        // mantissas
+        features =
+            features - featureSingleAssetVault /* - featureLendingProtocol */;
+
         Env env{*this, features};
 
         fund(

src/test/app/AMM_test.cpp

@@ -31,7 +31,7 @@ namespace test {
 struct AMM_test : public jtx::AMMTest
 {
     // Use small Number mantissas for the life of this test.
-    NumberMantissaScaleGuard sg_{ripple::MantissaRange::small};
+    NumberMantissaScaleGuard const sg_{ripple::MantissaRange::small};
 
 private:
     void

src/xrpld/app/paths/detail/AMMLiquidity.cpp

@@ -42,9 +42,11 @@ AMMLiquidity<TIn, TOut>::generateFibSeqOffer(
 {
     TAmounts<TIn, TOut> cur{};
 
+    Number const initialFibSeqPct =
+        Number{InitialFibSeqPct.mantissa(), InitialFibSeqPct.exponent()};
     cur.in = toAmount<TIn>(
         getIssue(balances.in),
-        InitialFibSeqPct * initialBalances_.in,
+        initialFibSeqPct * initialBalances_.in,
         Number::rounding_mode::upward);
     cur.out = swapAssetIn(initialBalances_, cur.in, tradingFee_);