CircleCI (opens new window)

# Start accepting Bitcoin today with BTCPay Server! This guide will walk you through the installation.

# Introduction

While our instructions cover how to install BTCPayServer in one click on Azure or Lunanode, BTCPay Server is not limited to those options.

You will find below information about how you can install BTCPay Server easily in any environment having docker available.

# Architecture

Architecture

As you can see, BTCPay depends on several pieces of infrastructure, mainly:

  • A lightweight block explorer (NBXplorer),
  • A database (PostgreSQL or SQLite),
  • A full node (eg. Bitcoin Core)

There can be more dependencies if you support more than just standard Bitcoin transactions, including:

Note: The setup process can be time consuming, but is heavily automated to make it a fun and easy experience.

Take a look at how BTCPay works in a video below.

Here is a presentation of the global architecture at Advancing Bitcoin conference.

# Full installation (for technical users)

You can also install BTCPay Server on your own machine or VPS instance.

The officially supported setup is driven by Docker (and Docker-Compose).

First, make sure you have a domain name pointing to your host A record, with ports 443 and 80 externally accessible. For Lightning Network, port 9735 is required (9736 if you use Litecoin Lightning). Otherwise, you will have to set a domain manually by running changedomain.sh.

Let's assume your domain is btcpay.EXAMPLE.com.

The setup below assumes you want to support Bitcoin, c-lightning, HTTPS automatically configured by Nginx. It also enables node pruning, which you can modify or ignore if you have enough disk space for a full node. Finally, your domain is btcpay.EXAMPLE.com should reflect your actual domain name.

Environment variables can be tailored to your needs. Some variables require additional storage space.

# Login as root
sudo su -

# Create a folder for BTCPay
mkdir BTCPayServer
cd BTCPayServer

# Clone this repository
git clone https://github.com/btcpayserver/btcpayserver-docker
cd btcpayserver-docker

# Run btcpay-setup.sh with the right parameters
export BTCPAY_HOST="btcpay.EXAMPLE.com"
export NBITCOIN_NETWORK="mainnet"
export BTCPAYGEN_CRYPTO1="btc"
export BTCPAYGEN_ADDITIONAL_FRAGMENTS="opt-save-storage-s"
export BTCPAYGEN_REVERSEPROXY="nginx"
export BTCPAYGEN_LIGHTNING="clightning"
export BTCPAY_ENABLE_SSH=true
. ./btcpay-setup.sh -i

exit

btcpay-setup.sh will then:

  • Install Docker
  • Install Docker-Compose
  • Make sure BTCPay starts at reboot via upstart or systemd
  • Setup environment variables to use BTCPay utilities
  • Add BTCPay utilities in /usr/bin
  • Start BTCPay Server

Video below guides you step by step on how to set up BTCPay Server on a VPS with Docker.

Check out this video if you're interested in learning more about setting up BTCPay with Docker Compose (opens new window).

Docker automated build (opens new window)

# Environment variables

btcpay-setup.sh will use the following environment variables:

  • BTCPAY_HOST: The hostname of your website (eg. btcpay.example.com)
  • BTCPAY_ADDITIONAL_HOSTS: Optional, specify additional domains to your BTCPayServer with https support if enabled. (eg. example2.com,example3.com)
  • REVERSEPROXY_HTTP_PORT: The public port the reverse proxy binds to for HTTP traffic (default: 80)
  • REVERSEPROXY_HTTPS_PORT: The public port the reverse proxy binds to for HTTPS traffic (default: 443)
  • REVERSEPROXY_DEFAULT_HOST: Optional, if using a reverse proxy nginx, specify which website should be presented if the server is accessed by its IP.
  • NBITCOIN_NETWORK: The type of network to use (eg. mainnet, testnet, or regtest. Default: mainnet)
  • LIGHTNING_ALIAS: An alias for your lightning network node, if used
  • BTCPAYGEN_CRYPTO1: First supported crypto currency (eg. btc, ltc. Default: btc)
  • BTCPAYGEN_CRYPTO2: Second supported crypto currency (eg. btc, ltc. Default: (empty))
  • BTCPAYGEN_CRYPTON: N'th supported crypto currency where N is 9 at maximum. (eg. btc, ltc. Default: (empty))
  • BTCPAYGEN_REVERSEPROXY: Specify reverse proxy to use; NGinx has HTTPS support. (eg. nginx, traefik, (empty). Default: nginx)
  • BTCPAYGEN_LIGHTNING: Lightning network implementation to use (eg. clightning, lnd, Default: (empty))
  • BTCPAYGEN_SUBNAME: The subname of the generated docker-compose file, where the full name is Generated/docker-compose.SUBNAME.yml (Default: generated)
  • BTCPAYGEN_ADDITIONAL_FRAGMENTS: Semicolon-separated list of additional fragments you want to use (eg. opt-save-storage)
  • LETSENCRYPT_EMAIL: An email will be sent to this address if certificate expires and fails to renew automatically (eg. me@example.com)
  • ACME_CA_URI: The API endpoint to ask for HTTPS certificate (Default: production)
  • BTCPAY_ENABLE_SSH: Optional, gives BTCPay Server SSH access to the host by allowing it to edit authorized_keys of the host, it can be used for managing the authorized_keys or updating BTCPay Server directly through the website. (Default: false)
  • BTCPAYGEN_DOCKER_IMAGE: Optional, Specify which generator image to use if you have customized the C# generator. Set to btcpayserver/docker-compose-generator:local to build the generator locally at runtime.
  • BTCPAY_IMAGE: Optional, Specify which btcpayserver image to use if you have a customized btcpayserver.
  • BTCPAYGEN_EXCLUDE_FRAGMENTS: Semicolon-separated list of fragments you want to forcefully exclude (eg. litecoin-clightning)
  • TOR_RELAY_NICKNAME: If tor relay is activated with opt-add-tor-relay, the relay nickname
  • TOR_RELAY_EMAIL: If tor relay is activated with opt-add-tor-relay, the email for Tor to contact you regarding your relay

Additionally, there are specific environment variables for some addons:

  • LIBREPATRON_HOST: If libre patron is activated with opt-add-librepatron (opens new window), the hostname of your libre patron website (eg. librepatron.example.com)
  • WOOCOMMERCE_HOST: If woocommerce is activated with opt-add-woocommerce (opens new window), the hostname of your woocommerce website (eg. store.example.com)
  • EPS_XPUB: If Electrum Personal Server (EPS) is activated with opt-add-electrum-ps (opens new window), you must set the Extended Public Key (XPUB, YPUB or ZPUB) of the wallet you want to use, before first run of the EPS server. If you accidently start EPS without this, it will not work properly as the model of EPS is to monitor only specified wallets.

# Tooling

A wide variety of useful scripts are available once BTCPay is installed:

  • bitcoin-cli.sh: Access your Bitcoin node instance (for RPC)
  • bitcoin-lightning-cli.sh: Access your C-Lightning node instance (for RPC)
  • changedomain.sh: Change the domain of your BTCPayServer (remember to disable 2FA/U2F first, as you risk being unable to log in to your account)
  • btcpay-update.sh: Update BTCPayServer to the latest version
  • btcpay-up.sh: Run docker-compose up
  • btcpay-down.sh: Run docker-compose down
  • btcpay-setup.sh: Change the settings of your server
  • . ./btcpay-setup.sh: Information about additional parameters
  • . ./btcpay-setup.sh -i: Set up your BTCPayServer
  • btcpay-restart.sh: Restart your BTCPayServer

# Under the hood

# Generated docker-compose

When you run btcpay-setup.sh, your environment variables are used by build.sh (opens new window) (or build.ps1 (opens new window)) to generate a docker-compose adapted for your needs. For the full list of options, see: Environment variables

By default, the generated file is Generated/docker-compose.generated.yml, constructed from the relevant Docker fragments (opens new window) for your setup.

Available BTCPAYGEN_ADDITIONAL_FRAGMENTS currently are:

You can also create your own custom fragments.

If you want to add an option to BTCPAYGEN_ADDITIONAL_FRAGMENTS and re-configure your install:

export BTCPAYGEN_ADDITIONAL_FRAGMENTS="$BTCPAYGEN_ADDITIONAL_FRAGMENTS;opt-lnd-autopilot"
. btcpay-setup.sh -i

For example, if you want btc and ltc support with nginx and clightning inside Generated/docker-compose.custom.yml:

Note: The first run might take a while, but following runs are instantaneous.

On Windows (run in powershell (opens new window)):

Invoke-Command {
    $BTCPAYGEN_CRYPTO1="btc"
    $BTCPAYGEN_CRYPTO2="ltc"
    $BTCPAYGEN_REVERSEPROXY="nginx"
    $BTCPAYGEN_LIGHTNING="clightning"
    $BTCPAYGEN_SUBNAME="custom"
    . .\build.ps1
}

On Linux:

BTCPAYGEN_CRYPTO1="btc" \
BTCPAYGEN_CRYPTO2="ltc" \
BTCPAYGEN_REVERSEPROXY="nginx" \
BTCPAYGEN_LIGHTNING="clightning" \
BTCPAYGEN_SUBNAME="custom" \
./build.sh

Next, you will need to configure the runtime environment variables for Generated/docker-compose.custom.yml:

# Again, what does btcpay-setup.sh do?

btcpay-setup.sh is a utility which does the following:

  1. Makes sure docker and docker-compose are installed on your system
  2. Generates a docker-compose via ./build.sh
  3. Sets up an Environment File (opens new window) to configure your docker-compose
  4. Sets up environment variables so the tools described in Tooling can work
  5. Adds symlinks of those tools into /usr/bin
  6. Makes sure BTCPay restarts on reboot via upstart or systemd
  7. Starts BTCPay via docker-compose

# Overview of files generated by btcpay-setup.sh

/etc/profile.d/btcpay-env.sh ensures that your environment variables are correctly setup when you login, so you can use the tools:

export BTCPAYGEN_OLD_PREGEN="false"
export BTCPAYGEN_CRYPTO1="btc"
export BTCPAYGEN_CRYPTO2=""
export BTCPAYGEN_CRYPTO3=""
export BTCPAYGEN_CRYPTO4=""
export BTCPAYGEN_CRYPTO5=""
export BTCPAYGEN_CRYPTO6=""
export BTCPAYGEN_CRYPTO7=""
export BTCPAYGEN_CRYPTO8=""
export BTCPAYGEN_CRYPTO9=""
export BTCPAYGEN_LIGHTNING="clightning"
export BTCPAYGEN_REVERSEPROXY="nginx"
export BTCPAYGEN_ADDITIONAL_FRAGMENTS=""
export BTCPAY_DOCKER_COMPOSE="/var/lib/waagent/custom-script/download/0/btcpayserver-docker/Production/docker-compose.generated.yml"
export BTCPAY_BASE_DIRECTORY="/var/lib/waagent/custom-script/download/0"
export BTCPAY_ENV_FILE="/var/lib/waagent/custom-script/download/0/.env"
export BTCPAY_HOST_SSHKEYFILE="/root/.ssh/id_rsa_btcpay"
if cat $BTCPAY_ENV_FILE &> /dev/null; then
  export $(grep -v '^#' "$BTCPAY_ENV_FILE" | xargs)
fi

/etc/systemd/system/btcpayserver.service ensures that you can control btcpay via systemctl, and that BTCPayServer starts on reboot:

[Unit]
Description=BTCPayServer service
After=docker.service network-online.target
Requires=docker.service network-online.target

[Service]
Type=oneshot
RemainAfterExit=yes

ExecStart=/bin/bash -c  '. /etc/profile.d/btcpay-env.sh && cd "$BTCPAY_BASE_DIRECTORY/btcpayserver-docker" && . helpers.sh && btcpay_up'
ExecStop=/bin/bash -c   '. /etc/profile.d/btcpay-env.sh && cd "$BTCPAY_BASE_DIRECTORY/btcpayserver-docker" && . helpers.sh && btcpay_down'
ExecReload=/bin/bash -c '. /etc/profile.d/btcpay-env.sh && cd "$BTCPAY_BASE_DIRECTORY/btcpayserver-docker" && . helpers.sh && btcpay_restart'

[Install]
WantedBy=multi-user.target

.env ($BTCPAY_ENV_FILE) contains environment variables passed to the containers managed by your docker-compose:

BTCPAY_HOST=btcpay.EXAMPLE.com
ACME_CA_URI=production
NBITCOIN_NETWORK=mainnet
LETSENCRYPT_EMAIL=me@EXAMPLE.com
BTCPAY_SSHTRUSTEDFINGERPRINTS=SHA256:eSCD7NtQ/Q6IBl2iRB9caAQ3lDZd8s8iUL6SdeNnhpA
BTCPAY_SSHKEYFILE=/datadir/id_rsa

# How can I add an altcoin to BTCPayServer?

  1. Add support for your crypto to NBitcoin (opens new window), NBxplorer (opens new window), and BTCPayServer (opens new window). (Use examples from other coins)
  2. Create your own docker image (Example for BTC (opens new window))
  3. Create a docker-compose fragment (Example for BTC (opens new window))
  4. Add your CryptoDefinition (Example for BTC (opens new window))

build.sh is using a pre-built image of the docker-compose generator on docker hub (opens new window). If you modify the code source of docker-compose generator (for example, the CryptoDefinition Example for BTC (opens new window)), you need to configure build.sh to use your own image by setting the environment variable BTCPAYGEN_DOCKER_IMAGE to btcpayserver/docker-compose-generator:local.

cd docker-compose-generator
BTCPAYGEN_DOCKER_IMAGE="btcpayserver/docker-compose-generator:local"

Or on powershell:

cd docker-compose-generator
$BTCPAYGEN_DOCKER_IMAGE="btcpayserver/docker-compose-generator:local"

Then run ./build.sh or . .\build.ps1. This will generate your docker-compose in the Generated folder, which you can then run and test.

Note that BTCPayServer developers will not spend excessive time testing your image, so make sure it works.

# Support

We are trying to update our dependencies to run on arm32v7 and x64 boards. Here is our progress:

Image Version x64 arm32v7 arm64v8 links
btcpayserver/docker-compose-generator latest ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/docker-compose-builder 1.24.1 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/bitcoin 0.20.1 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/lightning v0.9.1 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
shesek/lightning-charge 0.4.19-standalone ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
shesek/spark-wallet 0.2.9-standalone ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
saubyk/c-lightning-rest 0.3.0 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
shahanafarooqui/rtl 0.9.2 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/lnd v0.11.0-beta ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/btcpayserver 1.0.6.0$<BTCPAY_BUILD_CONFIGURATION>? ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
nicolasdorier/nbxplorer 2.1.46 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
nginx 1.16.0 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/docker-gen 0.7.7 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/letsencrypt-nginx-proxy-companion 1.12.2 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/btctransmuter 0.0.55 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/btcpayserver-configurator 0.0.21 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/eps 0.2.0 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
nicolasdorier/ndlc-cli 1.0.1 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
pihole/pihole v5.0 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/tor 0.4.2.7 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
postgres 9.6.5 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
kamigawabul/docker-bitcoingold 0.15.2 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
kamigawabul/btglnd latest ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
acinq/eclair release-0.4.1 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
chekaz/docker-bitcoinplus 2.7.0 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
dalijolijo/docker-bitcore 0.15.2 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
btcpayserver/dash 0.14.0.1 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
rockstardev/dogecoin 1.10.0 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
chekaz/docker-feathercoin 0.16.3 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
groestlcoin/docker-groestlcoin 2.20.1 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
groestlcoin/lightning v0.9.0 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
groestlcoin/groestlcoin-lightning-charge version-0.4.22 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
groestlcoin/groestlcoin-spark version-0.2.16 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
groestlcoin/eclair v0.3.3 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
groestlcoin/lnd v0.10.0-grs ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
btcpayserver/elements 0.18.1.7 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/litecoin 0.17.1-1 ✔️ (opens new window) ✔️ (opens new window) ️❌ Github (opens new window) - DockerHub (opens new window)
wakiyamap/docker-monacoin 0.17.1 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
btcpayserver/monero 0.17.1.3 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
jvandrew/btcqbo 0.3.36 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
redis 5.0.2-alpine ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
lukechilds/electrumx latest ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
jvandrew/librepatron 0.7.39 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
jvandrew/isso atron.22 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
talaia/python-teos latest ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
apotdevin/thunderhub v0.10.1 ✔️ (opens new window) ✔️ (opens new window) ✔️ (opens new window) Github (opens new window) - DockerHub (opens new window)
btcpayserver/docker-woocommerce 3.0.6-3 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
mariadb 10.3 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
traefik latest ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
chekaz/docker-trezarcoin 0.13.0 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)
romanornr/docker-viacoin 0.15.2 ✔️ (opens new window) ️❌ ️❌ Github (opens new window) - DockerHub (opens new window)

# FAQ

# How can I modify my environment?

As root, run . btcpay-setup.sh; this will show you the environment variable it is expecting. For example, if you support btc and ltc already, and want to add btg:

export BTCPAYGEN_CRYPTO3='btg'
. btcpay-setup.sh -i

# I deployed before btcpay-setup.sh existed (before May 17, 2018), can I migrate to this new system?

Yes, run the following commands to update:

sudo su -

cd $DOWNLOAD_ROOT/btcpayserver-docker
git checkout master
git pull
git checkout 9acb5d8067cb5c46f59858137feb699b41ac9f19
btcpay-update.sh
. ./btcpay-setup.sh -i
git checkout master
btcpay-update.sh

exit

# I'm getting an error on Windows: Cannot create container for service docker: Mount denied?

If you see this error:

Cannot create container for service docker: b'Mount denied:\nThe source path "\\\\var\\\\run\\\\docker.sock:/var/run/docker.sock"\nis not a valid Windows path'.

Run this in powershell (opens new window):

$Env:COMPOSE_CONVERT_WINDOWS_PATHS=1

Then, run docker-compose -f EXAMPLE.yml up.

This bug comes from Docker for Windows and is tracked on Github (opens new window).

# How I can prune my node(s)?

This will prune your Bitcoin full node to a maximum of 100GB (of blocks):

export BTCPAYGEN_ADDITIONAL_FRAGMENTS="opt-save-storage"
. ./btcpay-setup.sh -i

Other options are documented here.

# How can I customize the generated docker-compose file?

In some instances, you might want to customize your environment in more detail. While you could modify Generated/docker-compose.generated.yml manually, your changes would be overwritten the next time you run btcpay-update.sh.

Luckily, you can leverage BTCPAYGEN_ADDITIONAL_FRAGMENTS for this!

Let's enable pruning to 60 GB, for example:

First, copy opt-save-storage (opens new window) into the the docker fragment folder (opens new window) as opt-save-storage.custom.yml. Important: the file must end with .custom.yml, or there will be git conflicts whenever you run btcpay-update.sh.

Modify the new opt-save-storage.custom.yml file to your taste:

@@ -14,8 +14,7 @@ version: "3"
 services:
   bitcoind:
     environment:
-       BITCOIN_EXTRA_ARGS: prune=100000
+       BITCOIN_EXTRA_ARGS: prune=60000

Then set it up:

export BTCPAYGEN_ADDITIONAL_FRAGMENTS="$BTCPAYGEN_ADDITIONAL_FRAGMENTS;opt-save-storage.custom"
. ./btcpay-setup.sh -i

# Can I run BTCPay Server on ports other than 80 and 443?

You can change the ports for HTTP and HTTPS by setting the environment variables REVERSEPROXY_HTTP_PORT and REVERSEPROXY_HTTPS_PORT. This is handy when ports 80 and 443 are already in use on your host, or you want to offload SSL termination with an existing web proxy.

When you set REVERSEPROXY_HTTP_PORT to another value than 80, the built-in Let's Encrypt certificate will not work, as Let's Encrypt will try to validate your SSL certificate request by connecting from the internet to your domain on port 80. This validation request should be able to reach BTCPay Server in order to receive the certificate.

If you need to run on a different port, it's best to terminate SSL using another web proxy and forward your traffic.

# Can I offload HTTPS termination?

Yes. Please see the documentation.