Olaoluwa Osuntokun

This builds on https://github.com/lightningnetwork/lnd/pull/9046.

Closing based on the above. If the funds haven't been swept yet, feel free to re-open.

> Going SQL means we are giving up the flexibility provided by TLV, any updates to the scheme now need a migration. Future payment format should define its own struct...

> As mentioned in this [TODO](https://github.com/lightningnetwork/lnd/blob/master/routing/router.go#L1817), Using a commit hash to link to the line as things have shifted so this isn't an accurate line number any more: https://github.com/lightningnetwork/lnd/blob/7dfe4018ce2f95c2f6a9ff04e370f668fc755138/routing/router.go#L1908

See the `btcd` issue linked there. FWIW, testnet4 hasn't really "officially" launched yet, as it isn't included yet in an final release of any Bitcoin full node daemon (I'm not...

> One can already build Bitcoin Core from https://github.com/bitcoin/bitcoin/pull/29775 to run with testnet4. Yep, I linked the PR in my comment above. My main point is that: that isn't released...

I think we'll wait a bit longer for the dust to settle re testnet4 (eg: potential param changes, reexamining difficult adjustment fixes). Until then, testnet3 still works and pretty much...

Not completed, will keep this open to track integration.

There are two active PRs working on adding testnet4 support to `btcd`: * https://github.com/btcsuite/btcd/pull/2274 * https://github.com/btcsuite/btcd/pull/2275 So far none of them have added the new difficulty adjustment algorithm specific to...

> It's taking a long time; it's difficult to test things in Lightning without a test network... Testnet3 is still alive and active: https://mempool.space/testnet. Testnet4 is a thing as well,...