lspd simple server

lspd is a simple deamon that provides LSP services to Breez clients.

This is a simple example of an lspd that works with an lnd node.

Installation

1. git clone https://github.com/breez/lspd (or fork)
2. Modify the code in server.go if you use different values than the recommeded values when opening channels:

• ChannelCapacity: channel capacity is sats, defined in the channelAmount const (recommended: 1000000).
• TargetConf: the number of blocks that the funding transaction should confirm in, will be used for fee estimation (recommended: 0).
• MinHtlcMsat: the channel_reserve value in sats (recommended: 1000000).
• BaseFeeMsat: base tx fee in msats (recommended: 1000).
• FeeRate: fee rate (recommended: 0.000001). The total fee charged is BaseFeeMsat + (amount * FeeRate / 1000000)
• TimeLockDelta: the minimum number of blocks this node requires to be added to the expiry of HTLCs (recommended: 144).

3. Compile lspd using go build .
4. Create a random token (for instance using the command openssl rand -base64 48)
5. Define the environment variables as described in sample.env:
6. Run lspd
7. Share with Breez the TOKEN and the LISTEN_ADDRESS you've defined (send to contact@breez.technology)

Implement your own lspd

You can create your own lsdp by implementing the grpc methods described here.

Use a smaller channel reserve

You can apply the PR from https://github.com/lightningnetwork/lnd/pull/2708 to be able to create channels with a channel reserve smaller than 1% of the channel capacity. Then add the field RemoteChanReserveSat in the lnrpc.OpenChannelRequest struct when opening a channel.