manually submit the golden nonce via bitcoind

[citb0in]

Hey everybody. Please excuse me if this is a silly question and bear with a newbie who is trying to learn the ropes step by step. But I have the following general question:

If I were running a full-node but not a miner, could I manually enter a hash value for my candidate block by hand so that it would be propagated with the hope that the block would be accepted? Of course, the hash value I enter would have to match. Let's say may full-node has a candidate block and I was able somehow else (by accident  ) to find the golden nonce which leads to the block hash which would be lower than the actual target. Is that possible to submit this golden nonce into my node via bitcoin-cli or similar? Does this work at all or does it need a miner with mining software ?

[Biffa]

Here you go: Bitcoin mining by pencil and paper

[citb0in]

Thanks for that link. Unfortunately it doesn't answer my question.

[mocacinno]

Is this what you're looking for: https://developer.bitcoin.org/reference/rpc/submitblock.html

[citb0in]

Yes!  that should it be. Thanks a bunch

[Biffa]

Thanks for that link. Unfortunately it doesn't answer my question.

Ah, thought you'd need something to generate the "candidate block" by hand before you could submit it

[daplotzy]

I think you got your answer, but you can definitely do it via the bitcoin core Console window with a submitblock command and the hex string that contains the successful (below the target) hash.

I have done the mining hashing and hex string compilation through an excel spreadsheet.  Slow, but fun to see it in action.

[citb0in]

Yes, submitblock works fine. Out of curiosity, I'd like to see step-by-step how you did it. Do you have an example you could share your experience with string compilation on a spreadsheet? Looking forward to your instruction. Thanks in advance

[daplotzy]

Yes, submitblock works fine. Out of curiosity, I'd like to see step-by-step how you did it. Do you have an example you could share your experience with string compilation on a spreadsheet? Looking forward to your instruction. Thanks in advance

I give the spreadsheet away for free, here, calling it the "F9 Miner" because it does one hash with each time you press F9 (calculate) in Excel:

https://modulo.network

I built it as a learning experiment for myself, but think it is worth sharing.  There are no macros nor any array formulas, so you should not see any of that stuff if/when you download it.  The spreadsheet self-explanatory, but if you have any questions (or find any problems) let me know here!