fix bug in iouescrow, hook macro

hook/examples/macro.h

@@ -224,7 +224,7 @@ int out_len = 0;\
 
 
 #define INT64_FROM_BUF(buf)\
-   ((((uint64_t)((buf)[0]&7FU) << 56) +\
+   ((((uint64_t)((buf)[0] & 0x7FU) << 56) +\
      ((uint64_t)((buf)[1]) << 48) +\
      ((uint64_t)((buf)[2]) << 40) +\
      ((uint64_t)((buf)[3]) << 32) +\

src/ripple/app/tx/impl/Escrow.cpp

@@ -261,6 +261,15 @@ EscrowCreate::doApply()
         // perform the lock as a dry run before
         // we modify anything on-ledger
         sleLine = ctx_.view().peek(keylet::line(account, amount.getIssuer(), amount.getCurrency()));
+        if (!sleLine)
+        {
+            JLOG(ctx_.journal.trace())
+                << "EscrowCreate::doApply trustAdjustLockedBalance trustline missing "
+                << account << "-" 
+                << amount.getIssuer() << "/"
+                << amount.getCurrency(); 
+            return tecUNFUNDED;
+        }
 
         {
             TER result = 

src/ripple/ledger/View.h

@@ -494,6 +494,9 @@ trustAdjustLockedBalance(
     if (!view.rules().enabled(featurePaychanAndEscrowForTokens))
         return tefINTERNAL;
 
+    if (!sleLine)
+        return tecINTERNAL;
+
     auto const currency = deltaAmt.getCurrency();
     auto const issuer   = deltaAmt.getIssuer();
 
@@ -989,12 +992,12 @@ trustTransferLockedBalance(
         STAmount priorBalance =
             dstHigh ? -((*sleDstLine)[sfBalance]) : (*sleDstLine)[sfBalance];
 
-        STAmount finalBalance = priorBalance + (flipDstAmt ? -dstAmt : dstAmt);
+        STAmount finalBalance = priorBalance + dstAmt;
 
         if (finalBalance < priorBalance)
         {
             JLOG(j.warn())
-                << "trustTransferLockedBalance resulted in a lower final balance on dest line";
+                << "trustTransferLockedBalance resulted in a lower/equal final balance on dest line";
             return tecINTERNAL;
         }