Quadratic memory cost

2015-02-26 16:27:16 -06:00 · 2015-02-26 16:27:16 -06:00 · 6f66552f00
parent fa484fa892
commit 6f66552f00
1 changed files with 1 additions and 1 deletions
--- a/ethereumj-core/src/main/java/org/ethereum/vm/VM.java
+++ b/ethereumj-core/src/main/java/org/ethereum/vm/VM.java
@ -210,7 +210,7 @@ public class VM {
            long memoryUsage = (newMemSize.longValue() + 31) / 32 * 32;
            if (memoryUsage > oldMemSize) {
                memWords = (memoryUsage - oldMemSize) / 32;
-                long memGas = GasCost.MEMORY * memWords;
+                long memGas = GasCost.MEMORY * (memWords + memWords * memWords / 1024);
                program.spendGas(memGas, op.name() + " (memory usage)");
                gasCost += memGas;
            }