Mempool is now a core nix-bitcoin module.
This repo is still useful as an example of how to extend nix-bitcoin with Flakes.

Readme

Mempool module for nix-bitcoin.

Mempool is a fully featured Bitcoin visualizer, explorer and API service.

Install

1. Import the mempool module in your nix-bitcoin config.

   • If you use flakes, add this flake to your system flake.nix:

     {
       inputs.nix-bitcoin.url = "github:fort-nix/nix-bitcoin/release";
       inputs.nix-bitcoin-mempool = {
         url = "github:fort-nix/nix-bitcoin-mempool/release";
         inputs.nix-bitcoin.follows = "nix-bitcoin";
       };
     
       outputs = { self, nix-bitcoin, nix-bitcoin-mempool, ... }: {
         nixosConfigurations.mynode = nixpkgs.lib.nixosSystem {
           modules = [
             nix-bitcoin.nixosModules.default
             nix-bitcoin-mempool.nixosModules.default
             # ...
           ];
         };
       };
     }

   • In a non-flakes config (i.e., for users of the krops deployment method):
     Add another entry to imports at the top of your configuration.nix, like so:

     {
       imports = [
         (import (builtins.fetchTarball {
           # FIXME:
           # Replace `<SHA1>` in `url` below.
           # You can fetch the release SHA1 like so:
           # curl -fsS https://api.github.com/repos/fort-nix/nix-bitcoin-mempool/git/refs/heads/release | jq -r .object.sha
           url = "https://github.com/fort-nix/nix-bitcoin-mempool/archive/<SHA1>.tar.gz";
           # FIXME:
           # Add hash.
           # The hash is automatically shown when you evaluate your config.
           sha256 = "";
         })).nixosModules.default
     
         # Your other imports...
       ];
     
       # The rest of your node config...
     }

2. Edit your NixOS configuration

   Enable Mempool:

   services.mempool.enable = true;

   There are two Electrum backend servers you can use:

   • electrs (enabled by default):
     Small database size, slow when querying new addresses.

   • fulcrum:
     Large database size, quickly serves arbitrary address queries.
     Enable with:

     services.mempool.electrumServer = "fulcrum";

   Set this to create an onion service to make the Mempool web interface available via Tor:

   nix-bitcoin.onionServices.mempool-frontend.enable = true;

   Set this to route all outgoing internet requests from the backend (e.g. rate fetching) through Tor:

   services.mempool.tor = {
     proxy = true;
     enforce = true;
   };

   Make sure to set the above when using the secure-node.nix template.

   See modules/mempool.nix for all available options.

   After deploying, run nodeinfo to show the Mempool web interface address.

Developing

Run all tests:

nix flake check

Dev cmds: dev/dev.sh.