Implementing stratum, keep getting invalid solutions

Mining
1

I’m trying to make a miner, but can’t quite figure stratum out - keep getting invalid solution replies.
Here is an example of the exchange:
http://pastebin.com/MkdbstyX

I’ve tested the solution’s validity with zcashd.

I’ve read

and

for reference.

Trying on Flypool, if that matters.

At the moment i’m out of ideas…
Any help please?

2

Have you tried reversing the endianness of of sha256d hash before comparing it to target? That’s one mistake that I made.

Another one had something to do with endianness of nonce2 but if your sol validates against zcashd, that can hardly bd the cause.

3

The miner works just fine as stand-alone, both on mainnet and testnets, so i don’t expect any issues like sha256 endianness. Whatever is wrong, it’s in the stratum part.

I tried flipping the endianness of anything suspicious, including nonce_1 they sent, nonce i reply, time i reply, solution and so on.

4

Figured it out with some help on slack.
I was missing the size part of the solution - you should send it in script encoding, not just as-is.
Here is a more detailed doc that mentioned it: