Bitcoin Core Development – Fee File for Miners?

No, it has nothing to do with receiving commissions. It is not a wallet and has nothing to do with your wallet balance.

When making a transaction, you must pay a transaction fee. The question is, what fees should I pay? To handle this, Bitcoin Core has a fee estimator that looks at transactions in the mempool and how long it takes for those transactions to be confirmed. We then generate estimates for various confirmation time objectives. These estimates are stored in the following location: fee_estimates.dat file.