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Installation instructions for lnd and lspd

Requirements

  • lnd
  • lspd
  • postgresql

Installation

LND

Follow LND installation instructions here.

lspd

Needs to be build from source:

git clone https://github.com/breez/lspd 
cd lspd
make release-lspd                      # compile lspd

Postgresql

Lspd supports postgresql backend. Create new database and user for lspd:

CREATE ROLE <username>;
ALTER ROLE <username> WITH NOSUPERUSER INHERIT NOCREATEROLE NOCREATEDB LOGIN NOREPLICATION NOBYPASSRLS PASSWORD '<password>';
CREATE DATABASE <dbname> WITH TEMPLATE = template0 ENCODING = 'UTF8' LC_COLLATE = 'en_US.UTF-8' LC_CTYPE = 'en_US.UTF-8';
ALTER DATABASE <dbname> OWNER TO <username>;

Configure

  1. Create a random token (for instance using the command openssl rand -base64 48, or ./lspd genkey)
  2. Define the environment variables as described in sample.env. If CERTMAGIC_DOMAIN is defined, certificate for this domain is automatically obtained and renewed from Let's Encrypt. In this case, the port needs to be 443. If CERTMAGIC_DOMAIN is not defined, lspd needs to run behind a reverse proxy like treafik or nginx.

ENV variables:

  • LISTEN_ADDRESS defines the host:port for the lspd grpc server
  • CERTMAGIC_DOMAIN domain on which lspd will be accessible
  • DATABASE_URL postgresql db url
  • AWS_REGION
  • AWS_ACCESS_KEY_ID
  • AWS_SECRET_ACCESS_KEY
  • MEMPOOL_API_BASE_URL uses fee estimation for opening new channels (default: https://mempool.space)
  • MEMPOOL_PRIORITY priority with which open new channels using mempool api (default: economy)

Running lspd on LND

  1. Run LND with the following options set:
    • --protocol.zero-conf: for being able to open zero conf channels
    • --protocol.option-scid-alias: required for zero conf channels
    • --requireinterceptor: to make sure all htlcs are intercepted by lspd
    • --bitcoin.chanreservescript="0" to allow the client to have zero reserve on their side
  2. Run lspd

Final step

  1. Share with Breez the TOKEN and the LISTEN_ADDRESS you've defined (send to contact@breez.technology)