Add minimum fee option

[yuvadm]

In some rebalance cases it's a waste of time attempting low-fee rebalances (e.g. 1ppm) that will obviously fail due to insufficient liquidity. It would be nice to have a flag that sets a minimum fee for rebalance attempts.

[GordianLN]

Y no love for this one?
When rebalancing WOS or anything else, instead of going after that single in a million chance to hit a new 1ppm channel before it's drained, it's actually more efficient to set a minimum rebalance fee rate to ignore all those channels that will just increase time, DB bloat, and FC risk due to pending htlcs.

[C-Otto]

You might be interested in the top-up feature of lnd-manageJ, which you can configure to optimize for reliability. Other than that: this is an open source project. Feel free to submit a PR.

[GordianLN]

You played the cheat card of "make a PR"! 😛 Fair enough, you have more interesting projects to work on right now, and I have no python experience and run on an arm64 architecture so LMJ is not an option, we're cool 😉