Updating gas calculation

rsksmart · Dec 13, 2024 · 5091668 · 5091668
1 parent ec1e055
commit 5091668
Showing 1 changed file with 10 additions and 1 deletion.
diff --git a/rskj-core/src/main/java/org/ethereum/vm/VM.java b/rskj-core/src/main/java/org/ethereum/vm/VM.java
@@ -769,10 +769,19 @@ private long computeDataCopyGas() {
 
     private long computeMemoryCopyGas() {
         DataWord length = stack.get(stack.size() - 3);
-        DataWord offset = stack.peek();
+        DataWord src = stack.get(stack.size() - 2);
+        DataWord dst = stack.peek();
+
         long copySize = Program.limitToMaxLong(length);
         checkSizeArgument(copySize);
+
+        DataWord offset = dst;
+        if (src.value().compareTo(dst.value()) > 0) {
+            offset = src;
+        }
+
         long newMemSize = memNeeded(offset, copySize);
+
         // Note: 3 additional units are added outside because of the "Very Low Tier" configuration
         return calcMemGas(oldMemSize, newMemSize, copySize);
     }