How to make monero-powpy compatable with xmrig-proxy running in 'nicehash' mode?

Question

I know I have to somehow implement this spec but other than that I'm not sure.

Any help/resources is appreciated.

Answer 1

You'd modify def pack_nonce to account for the Nicehash nonce byte. I.e. only pack 3 bytes.

E.g.

diff --git a/stratum-miner.py b/stratum-miner.py
index 486e877..ec3ae5f 100644
--- a/stratum-miner.py
+++ b/stratum-miner.py
@@ -99,8 +99,8 @@ def main():
 def pack_nonce(blob, nonce):
     b = binascii.unhexlify(blob)
     bin = struct.pack('39B', *bytearray(b[:39]))
-    bin += struct.pack('I', nonce)
-    bin += struct.pack('{}B'.format(len(b)-43), *bytearray(b[43:]))
+    bin += struct.pack('I', nonce & 0x00ffffff)[:3]
+    bin += struct.pack('{}B'.format(len(b)-42), *bytearray(b[42:]))
     return bin
 
 
@@ -146,6 +146,7 @@ def worker(q, s):
                 elapsed = time.time() - started
                 hr = int(hash_count / elapsed)
                 print('{}Hashrate: {} H/s'.format(os.linesep, hr))
+                nonce = struct.unpack('I', bin[39:43])[0]
                 submit = {
                     'method':'submit',
                     'params': {

Or simply using the latest version with the --nicehash flag.