Question to FAILED_LOW_FEE and Sweep #3
Description
When sending normal amounts via Lightning, I sometimes get the FAILED_LOW_FEE error. Sometimes I can work around it by splitting the amount I originally wanted to send into smaller amounts and always when I have 1 Satoshi left, then I cant continue sending this 1 remaining satoshi, except of when I sweep the lightning wallet.
So first question: Why does the FAILED_LOW_FEE error even exist? Doesnt make sense, as wos probably has their nodes running all in one node anyways
Second question: Does someone know how you can always avoid the FAILED_LOW_FEE error? I have tried doubling the minimum balance of 1 Sat per failed sending approach, but this only sometimes work. Sometimes it doesnt work for an entire day, no matter what I try. Most of the times it doesnt work, when I dont have big liquidity in the wallet (less than 1E-4 Btc)
Third question: What does sweeping actually do except of sending the entire amount (including the normally minimum 1 Sat per wallet)? I've tested if the wallet can receive sats again. Answer: yes. So does it do anything else than what I've mentioned? Is it a good idea to always use the sweeping mechanism, when sending between wallets, when I then can send it back anyways? Or will the wallet maybe get deactivated in future or what?