On-Chain Wallets

[raymond98]

Swap-in Wallet Endpoints Added:

• GET /getswapinaddress: Returns the current wallet address and index.
• GET /swapinwalletbalance: Returns swap-in wallet balances.
• GET /swapintransactions: Returns UTXOs.
• GET /getswapinwalletinfo: Returns descriptors.

Final Wallet Endpoints Added:

• GET /finalwalletbalance: Returns final wallet balances.
• GET /getfinalwalletinfo: Returns final wallet xpub and path.
• GET /getfinaladdress: Returns final wallet address.

Other Endpoints:

• DELETE /payments/incoming/{paymentHash}: Deletes an incoming payment by its paymentHash.
• POST /splicein: Performs manual splice-in to any open channel.

Note:
Changes made to the lightning-kmp's fee-credit-8 branch on the Peer:

• Using ElectrumWatcher instead of MempoolSpaceWatcher.
• Updating the swapInFeeratesFlow value inside the updateFeerates as required by the swapInJob for auto swap-ins.

[massmux]

Adding this feature would be very nice in my opinion.