Merge #13096: [Policy] Fix MAX_STANDARD_TX_WEIGHT check

2f1a30c63 Fix MAX_STANDARD_TX_WEIGHT check (Johnson Lau)

Pull request description:

  As suggested by the constant name and its comment in policy.h, a transaction with a weight of exactly MAX_STANDARD_TX_WEIGHT should be allowed. Users could be confused.

Tree-SHA512: af417de1c6a2e6796ebbb39aa0caad8764302ded155cb1bbfbe457e4567c199cc53256189832b17d4aeec369e190b3edd4c6116d5f0b8cf0ede6dfb4ed83bdd3

src/policy/policy.cpp

@@ -88,7 +88,7 @@ bool IsStandardTx(const CTransaction& tx, std::string& reason)
     // computing signature hashes is O(ninputs*txsize). Limiting transactions
     // to MAX_STANDARD_TX_WEIGHT mitigates CPU exhaustion attacks.
     unsigned int sz = GetTransactionWeight(tx);
-    if (sz >= MAX_STANDARD_TX_WEIGHT) {
+    if (sz > MAX_STANDARD_TX_WEIGHT) {
         reason = "tx-size";
         return false;
     }