I noticed the last two blocks were no longer showing any signal and the commit to the bitbucket repo what is the main purpose for this code?
The code used on this pool is unique and different from the main ckpool code. That change you're asking about is for broken bitcoin daemons that say they have witness data and then don't provide it. Code:
if (likely(witnessdata_check)) {
+ if (wb->insert_witness && witnessdata_check[0] && safecmp(witnessdata_check + 4, wb->witnessdata) != 0)
+ LOGERR("Witness from btcd: %s. Calculated Witness: %s", witnessdata_check + 4, wb->witnessdata);
+ } else
+ LOGNOTICE("Segwit rules returned but no default_witness_commitment to check witness data");
break;
}
}
+ if (wb->insert_witness && witnessdata_check[0] && safecmp(witnessdata_check + 4, wb->witnessdata) != 0)
+ LOGERR("Witness from btcd: %s. Calculated Witness: %s", witnessdata_check + 4, wb->witnessdata);
+ } else
+ LOGNOTICE("Segwit rules returned but no default_witness_commitment to check witness data");
break;
}
}
sure, good luck to you! 
