feat: check maximum difficulty increase

catalystdao · Oct 28, 2024 · a1f0ff3 · a1f0ff3
1 parent 874920a
commit a1f0ff3
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/BtcPrism.sol b/src/BtcPrism.sol
@@ -264,6 +264,7 @@ contract BtcPrism is IBtcPrism {
             // https://blog.lopp.net/the-block-storms-of-bitcoins-testnet/
             if (!isTestnet) {
                 if (target >> 2 >= lastTarget) revert DifficultyRetargetLT25();
+                if (target << 2 <= lastTarget) revert DifficultyRetargetLT25();
             }
             periodToTarget[period] = target;
         } else if (!isTestnet) {