Docker setup for Bitcoin, Elements/Liquid, LND, Clightning, Eclair, & Electrs in regtest mode

ONLY FOR DEVELOPMENT and TESTING. These tools may not be suitable for production deployments.

     ┌--------------------------------------------------------------------┐
L+:  |                       YOUR APPLICATION STACK                       |
     └---------------------------------+-------+--------------------------┘
                                       |       |
                    ┌---------┐        |       |
                    |         |        |       |
                    |  FRANK  |╟-------┤       ├------┐
                    |         |        |       |      |
                    └----+----┘        |       |      |
                         |             |       |      |
           ┌-------------|-----------┐ ╧       |      ╧
     ┌-----+-----┐  ┌----+----┐  ┌---+-------┐ | ┌----------┐  ┌----------┐
     |           |  |         |  |           | | |          |  |          |
L2:  |   ALICE   +--+   BOB   +--+   CAROL   | | |   DAVE   +--+   EMMA   |
     |           |  |         |  |           | | |          |  |          |
     └-----+-----┘  └----+----┘  └-----+-----┘ | └----+-----┘  └-----+----┘
           |             |             |       |      |              |
           |             | ┌---------┐ |       |     ┌+--------------+┐
           |             | | ELECTRS |╟|-------┤     |      $LBTC     |
           |             | └----+----┘ |       |     └+--------------+┘
           |             |      |      |       |      |              |
           |   ┌---------+------+-┐    |       |    ┌-+--------------+-┐
           └---+                  +----┘       |    |                  |
L1:            |     BITCOIN      |╟-----------┴---╢|     ELEMENTS     |
               |                  +-----------------+                  |
               └------------------┘                 └------------------┘

This docker compose template launches bitcoin, two lnd containers named alice & bob, with a clightning container as carol, and an eclair container as frank.

Additionally it can launch an elements sidechain (aka Liquid), with clightning implementation containers as dave & emma servicing the LBTC asset.

An application demo node is include which demonstrates how to connect to LND and listen to invoice messages and is able to generate transaction spam for fee estimation.

An electrs server is provided as another test app for exposing the Electrum protocol wrapper for bitcoin.

Everything is configured to run in regtest mode but can be adjusted as required. Images are provided for AMD64 and ARM64 architectures but you may have to manually build for others (see bottom).

See the changelog before upgrading.

Notes & prerequisites

• docker with compose installation is required (https://docs.docker.com/install/).
• jq tool is used in examples for parsing json responses.
• All nodes will sync to chain after the first Bitcoin & Elements regtest blocks are generated.
• Precompiled images are provided on Docker Hub but it is not recommended to use them in production environments.
• Ports and other daemon configuration can be changed in the .env and docker-compose files.

To Do

• Orchestration
• Clightning REST/RPC example
• Add Clightning & Eclair configs to RTL
• Lightning Terminal
• Taro/RGB protocols
• Libbitcoin reference
• Elements token creation and transaction scripts
• Elements pegout example
• Token swaps within Elements
• Lightning swaps across Bitcoin and Elements
• Trampoline routing example
• Other scripting examples

How to run

Precompiled images will be downloaded from Docker Hub (see below for manual build instructions). From your terminal in this folder:

$ bin/stack up -d bitcoin electrs
# setup default wallet with predictable addresses
$ bin/stack bitcoin -named createwallet wallet_name=default descriptors=false
$ bin/stack bitcoin sethdseed true cSXteaZPxiDNEjtsgMhDKik5CL6YUc2hrEdkm51DrL85873UUFiQ
$ bin/stack bitcoin generate 101
$ bin/stack up -d alice bob frank

# Elements can be started optionally
$ bin/stack up -d elements
# setup default wallet with predictable addresses
$ bin/stack elements -named createwallet wallet_name=default descriptors=false
$ bin/stack elements sethdseed true cU3PLoGpKkZ3M72w5jLB7Yub5WSLvep28GQQbFYQSi8JZcppAFVD
$ bin/stack elements generate 101

# Clightning can also be started on Bitcoin & Elements
$ bin/stack up -d carol dave emma

Check containers are up and running with:

$ docker ps -a

Use the provided CLI tool to execute commands in the containers:

$ bin/stack bitcoin getwalletinfo
$ bin/stack elements getwalletinfo
$ bin/stack alice getinfo
$ bin/stack bob getinfo
$ bin/stack carol getinfo
$ bin/stack dave getinfo
$ bin/stack emma getinfo
$ bin/stack frank getinfo

Generate some bitcoin tx spam to enable smart fee estimation.

$ bin/stack up -d demo
$ docker compose exec demo sh -c "node bitcoin-spam.js"
$ bin/stack bitcoin estimatesmartfee 24 ECONOMICAL

Notification listener demo

Start following the demo subscriber node in a separate terminal window to see invoice messages as they come through.

$ bin/stack logs -f demo
$ bin/stack alice addinvoice 1000

LND AMP to LND

A command is provided to easily create channels, so we can open some from alice to bob with some funding between the two lnd containers and do an atomic multi-part (amp) payment. Alternatively you can use max_parts parameter.

$ bin/stack alice channelto bob 5000000
$ bin/stack alice channelto bob 2000000
$ bin/stack alice channelto bob 500000
# once channels are opened a payment can be simulated
$ BOB_INVOICE=$(bin/stack bob addinvoice 5275000 | jq -r '.payment_request')
$ bin/stack alice payinvoice --amp -f $BOB_INVOICE
$ bin/stack alice listchannels
$ bin/stack bob listchannels

LND keysend to LND

The bob container is also configured to accept keysend transactions so payments can be made without requiring an invoice.

# assuming channel is opened as above
$ BOB_NODE=$(bin/stack bob getinfo | jq -r '.identity_pubkey')
$ bin/stack alice sendpayment --keysend --dest $BOB_NODE --amt 10000

LND invoice payment to Clightning

Similar commands will connect alice & bob to carol across the clightning implementation of LN on Bitcoin.

$ bin/stack alice channelto carol 2000000
# open a 0.5BTC WUMBO channel
$ bin/stack bob channelto carol 50000000
# once channels are opened a payment can be simulated on a wumbo channel
$ CAROL_INVOICE=$(bin/stack carol invoice 4294967295msat "label1" "desc1" | jq -r '.bolt11')
$ bin/stack bob payinvoice -f $CAROL_INVOICE
$ bin/stack carol listfunds

LND keysend payment to Clightning

You can also receive keysend payments to clightning:

# assuming channel is opened as above (might take a minute to sync & activate)
$ CAROL_NODE=$(bin/stack carol getinfo | jq -r '.id')
$ bin/stack bob sendpayment --keysend --dest $CAROL_NODE --amt 10000

LND PSBT based channel creation

For this process we will use two terminal windows one for LND and one for Bitcoin PSBT processing.

# LND terminal
$ BOB_NODE=$(bin/stack bob getinfo | jq -r '.identity_pubkey')
$ bin/stack alice openchannel --node_key $BOB_NODE --local_amt 750000 --psbt
# Bitcoin terminal
$ bin/stack bitcoin walletcreatefundedpsbt '[]' '[{"<address chosen by lnd>":0.00750000}]' | jq -r '.psbt' > funded.psbt
$ docker cp funded.psbt "$(docker compose ps -q alice)":/funded.psbt
# LND terminal enter `/funded.psbt` as file path
# Bitcoin terminal signing round
$ bin/stack bitcoin walletprocesspsbt $(cat funded.psbt) | jq -r '.psbt' > signed.psbt
# docker cp signed.psbt "$(docker compose ps -q alice)":/signed.psbt
# > LND terminal enter `/signed.psbt` as file path
$ bin/stack bitcoin generate 3
$ bin/stack alice listchannels

Clightning keysend to LND

Now clightning interoperates with lnd using keysend

$ BOB_NODE=$(bin/stack bob getinfo | jq -r '.identity_pubkey')
$ bin/stack carol keysend $BOB_NODE 2000000

Clightning MPP to LND

clightning supports MPP by default so payments are adaptively split into random amounts.

$ ALICE_INVOICE=$(bin/stack alice addinvoice 1000000 | jq -r '.payment_request')
$ bin/stack carol pay $ALICE_INVOICE
$ bin/stack alice lookupinvoice $(bin/stack alice decodepayreq $ALICE_INVOICE | jq -r '.payment_hash') | jq '.htlcs'

Clightning plugin

A clightning plugin example is included for more advanced feature development.

$ bin/stack carol hello yourname

Eclair invoice payment through LND to Clightning

Similar commands will connect frank to bob from the eclair implementation of LN on Bitcoin.

$ bin/stack frank channelto bob 10000000
$ CAROL_INVOICE=$(bin/stack carol invoice 50000000msat "label2" "desc2" | jq -r '.bolt11')
$ bin/stack frank payinvoice --invoice=$CAROL_INVOICE
$ bin/stack frank audit

Peg-in Bitcoin to Elements

Elements sidechain is available and can be pegged in from regtest Bitcoin chain using the provided script command.

$ bin/stack bitcoin pegin elements 13.37
$ bin/stack elements getwalletinfo

Clightning payments on Elements

You can also open a LN L-BTC channel on clightning across the Elements chain between dave & emma!

# open a 0.5LBTC wumbo channel
$ bin/stack dave channelto emma 50000000
# this may take a minute to sync nodes & activate before channel has visible balance
# once channels are opened a payment can be simulated (max size 4294967295msat)
$ EMMA_INVOICE=$(bin/stack emma invoice 40000000msat "label1" "description1" | jq -r '.bolt11')
$ bin/stack dave pay $EMMA_INVOICE
$ EMMA_NODE=$(bin/stack emma getinfo | jq -r '.id')
$ bin/stack dave keysend $EMMA_NODE 25000000
$ bin/stack dave listpays
$ bin/stack emma listinvoices

REST/RPC examples

REST/RPC queries can be executed directly from your application to each daemon. Use standard RPC adapters to connect to these and have full control over money flow; hook into message queues for notifications B).

# bitcoin
$ curl --data-binary '{"jsonrpc":"1.0","id":"curltext","method":"getwalletinfo","params":[]}' -H 'content-type:text/plain;' http://bitcoin:[email protected]:18889

# elements
$ curl --data-binary '{"jsonrpc":"1.0","id":"curltext","method":"getwalletinfo","params":[]}' -H 'content-type:text/plain;' http://elements:[email protected]:18886

# lnd
$ ALICE_MACAROON_HEADER="Grpc-Metadata-macaroon: `docker compose exec -T alice cat /home/lnd/.lnd/data/chain/bitcoin/regtest/admin.macaroon | xxd -ps -u -c 1000`"
$ echo "$(docker compose exec -T alice cat /home/lnd/.lnd/tls.cert)" > ./alice-tls.cert
$ curl -XGET --cacert ./alice-tls.cert --header "$ALICE_MACAROON_HEADER" https://127.0.0.1:8090/v1/balance/channels

# eclair
$ curl -XPOST -u :password http://127.0.0.1:8110/getinfo

# clightning
Clightning exposes a JSON-RPC interface via a socket... example to follow..

# electrs
$ echo '{"jsonrpc":"2.0","method":"blockchain.block.header","id":"curltext","params":[0]}' | nc 127.0.0.1 50001

RTL Admin

A Ride-The-Lightning admin UI container is available. The interface is configured to monitor alice and bob by default and is available at http://localhost:3000 with login password rtl.

$ bin/stack up -d rtl

Other information

View daemon logs as follows:

$ bin/stack logs -f

When you are done you can destroy all running containers and volumes with:

$ bin/stack down -v

Single architecture images can be built locally as follows:

$ docker build --build-arg BITCOIN_VERSION=23.0 -t bitcoinstack/bitcoin:23.0-alpine ./bitcoin

Multi-architecture images can be built locally using the following commands:

$ docker buildx create --name bitcoinstack --platform linux/amd64,linux/arm64
$ docker buildx build --builder bitcoinstack --platform linux/amd64,linux/arm64 --build-arg BITCOIN_VERSION=22.0 -t bitcoinstack/bitcoin:22.0-alpine ./bitcoin

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