Quote from: albert0bsd on Today at 04:02:29 PM

Quote from: rukkamind on Today at 01:31:36 PM

I decide in my code 250~500 transactions with better fees and ~2500 with small fees and get ~4000transactions and try mine block. I think lucky your transaction faill

Nice to know, What you mean with " I think lucky your transaction faill" ? BTW edit your post and quote it correctly.

I’ll try to explain better.
In my btc_miner, using Bitcoin Core and an RPC connection, I have access to all unverified transactions.
In this mempool, for example, I have 15,000 transactions. It’s impossible to include all of them in the block for mining.
I have limited space, so I typically choose between 3,000 to 5,000 transactions to be included in the block.
To make it profitable, I select transactions with higher fees first and then add those with lower fees to the block.
Once the transactions are defined, along with the Merkle tree and the previous block hash, I attempt to find the nonce.
The goal is to find a SHA-256 double hash with 19 leading zeros within the 2^32 possible nonce values.
If a valid nonce isn’t found, the process restarts. The miner who discovers the nonce and submits it first wins.
Unfortunately, after 5 months, I haven’t been able to mine any block. I only have 3 RTX 3080 GPUs; I don’t have an ASIC machine.
Therefore, Alberto, it’s possible that the miner didn’t choose your transaction, even if it had a higher fee.