Lightning Service Provider Spec

API specifications for Lightning Service Providers (LSP)

The goal of this repository is to provide a unified API specification for Lightning Service Providers (LSP) to create interoperability between different Lightning Network wallets/clients and LSPs.

The group meets every second week on Thursday 11am UTC. The meeting is open to everyone. Please join the Telegram group for more information.

• Telegram group
• Meeting transcriptions

Status Specification

All LSPS specifications include a "Status" field. "Status" can be one of the following:

• "Draft" - The specification is still under active development and subject to change. Implementation is not recommended at this time.
• "For Implementation" - The specification has been widely reviewed by LSPS participants, is believed to have addressed all raised issues, and LSPS participants recommend this specification to be implemented.
• "Stable" - The specification has been implemented by at least one client and one LSP, which are developed by at least two different organizations or open-source project teams, and both development teams have reported interoperability without further modifications or clarifications of the specification.

Specs

LSPS0 Transport Layer

Describes the basics of how clients and LSPs communicate to each other.

LSPS1 Channel Request

A channel purchase API to buy channels from an LSP.

LSPS2 JIT Channels

Describes how a client can buy channels from an LSP, by paying via a deduction from their incoming payments, creating a channel just-in-time to receive the incoming payment.

LSPS5 Webhook Registration

Describes how a generic LSP can push a notification at a generic client, via an HTTPS webhook.

Services

List of Lightning Service Providers in alphabetic order that currently or will support LSP specs in future.

(If you would like to get added to this list, please open a PR and update the table below)

Name	Specs	Status
Blocktank	-	-
Breez	-	-
c=	-	-

Responsible Disclosure

As CVE-2019-12998, CVE-2019-12999, and CVE-2019-13000 show, it is possible to have CVE-level bugs in the specification.

Please report any security-critical issues regarding LSPS to the contacts below. When reporting, please encrypt your security-critical bug report via PGP / GPG and send to the emails below, with the subject [LSPS Bug].

• ZmnSCPxj jxPCSnmZ zmnscpxj@cequals.xyz
• Yaacov Akiba Slama yaslama@breez.technology
• Reza reza@synonym.to

Import the public keys from the responsible disclosure public keys file.

If necessary, also include your own PGP public key when sending a bug report, so that we can reply privately.

For example, you could write your bug report into a text file:

cat > lsps999-cve-bug-report.txt <<TEXT
In LSPS999, section "Some Section Name", the description of some
process lacks a check of some value.
If this check is not performed by the client, then a malicious
LSP can provide an invalid value, which will lead to the client
expecting some other thing, and then losing all their funds.

I recommend putting a check of this value explicitly in the
specification, so that clients following the written
specification are not vulnerable to funds loss.
TEXT

Then, import the above public keys:

gpg --import responsible-disclosure-public-keys.asc

And then encrypt the file so that recipients can read it:

gpg --armor --encrypt --recipient zmnscpxj@cequals.xyz --recipient yaslama@breez.technology --recipient reza@synonym.to lsps999-cve-bug-report.txt

This will generate a lsps999-cve-bug-report.txt.asc file, which you can email to the above recipients, with the subject [LSPS Bug].