That would invalidate any pre-signed transactions that are currently out there. You can't just change the rules out from under people. > On May 30, 2017, at 4:50 PM, James MacWhyte via bitcoin-dev wrote: > > >> The 1MB classic block size prevents quadratic hashing >> problems from being any worse than they are today. >> > > Add a transaction-size limit of, say, 10kb and the quadratic hashing problem is a non-issue. Donezo. > _______________________________________________ > bitcoin-dev mailing list > bitcoin-dev@lists.linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev