Enforce rippling constraints during payments

src/ripple/app/paths/impl/BookStep.cpp

@@ -684,6 +684,26 @@ BookStep<TIn, TOut>::check(StrandContext const& ctx) const
         return temBAD_PATH_LOOP;
     }
 
+    if (amendmentRIPD1443(ctx.view.info().parentCloseTime))
+    {
+        if (ctx.prevStep)
+        {
+            if (auto const prev = ctx.prevStep->directStepSrcAcct())
+            {
+                auto const& view = ctx.view;
+                auto const& cur = book_.in.account;
+
+                auto sle =
+                    view.read(keylet::line(*prev, cur, book_.in.currency));
+                if (!sle)
+                    return terNO_LINE;
+                if ((*sle)[sfFlags] &
+                    ((cur > *prev) ? lsfHighNoRipple : lsfLowNoRipple))
+                    return terNO_RIPPLE;
+            }
+        }
+    }
+
     return tesSUCCESS;
 }