diff --git a/nix/rust.nix b/nix/rust.nix
deleted file mode 100644
index eec64ccd7..000000000
--- a/nix/rust.nix
+++ /dev/null
@@ -1,10 +0,0 @@
-{ sources ? import ./sources.nix }:
-
-let
-  pkgs =
-  import sources.nixpkgs {overlays = [ (import sources.nixpkgs-mozilla) ]; };
-  channel = "nightly";
-  date = "2020-11-19";
-  targets = [];
-  chan = pkgs.rustChannelOfTargets channel date targets;
-in chan
diff --git a/nix/scripts.nix b/nix/scripts.nix
deleted file mode 100644
index d5e3e344b..000000000
--- a/nix/scripts.nix
+++ /dev/null
@@ -1,83 +0,0 @@
-# An overlay for custom scripts
-final: prev: {
-  # Run a local minikube cluster. minikube config controlled with $MINIKUBE_ARGS
-  # Minimum requirements:
-  # * User can use Docker
-  # * Docker supports BuildKit
-  whcluster = final.writeShellScriptBin "whcluster" ''
-    set -e
-    default_minikube_args="--cpus=10 --memory=10gb --disk-size=200gb --driver=kvm2 -p minikube-$USER"
-    export MINIKUBE_ARGS=''${MINIKUBE_ARGS:-$default_minikube_args}
-    ${final.minikube}/bin/minikube start $MINIKUBE_ARGS
-    ${final.whinotify}/bin/whinotify
-    ${final.whkube}/bin/whkube
-  '';
-
-  # Change current kubectl context to the wormhole namespace
-  whkube = final.writeShellScriptBin "whkube" ''${final.kubectl}/bin/kubectl config set-context --current --namespace=wormhole'';
-
-  # Run tilt on the local cluster. Takes guardian count as argument.
-  whtilt = final.writeShellScriptBin "whtilt" ''
-    tilt_port=''${1:-10350}
-    n_guardians=''${2:-5}
-    echo "Starting Tilt with $n_guardians guardians"
-    ${final.killall}/bin/killall tilt
-    ${final.tilt}/bin/tilt up --update-mode exec --port $tilt_port -- --num=$n_guardians --pyth --explorer 
-  '';
-
-  # increase sysctl value for inotify watch count to sufficient level
-  whinotify = final.writeShellScriptBin "whinotify" ''
-    ${final.minikube}/bin/minikube ssh -p minikube-$USER 'echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p'
-  '';
-
-  # one-stop-shop for setting up a cluster on a remote machine and
-  # running tilt on it. MINIKUBE_ARGS defaults expect the remote to be
-  # beefy.
-  # 
-  # Usage: whremote <remote-machine>
-  #
-  # Minimum remote machine requirements:
-  # * Can run whcluster (see above)
-  # * Remote user has a working nix installation (single/multi user)
-  #
-  # Remote machine nice-to-haves:
-  # * You have passwordless/cached session access to the remote - 
-  # * The remote is more powerful than your local machine. If not, use whcluster + whtilt locally instead. 
-  whremote = final.writeShellScriptBin "whremote" ''
-    set -x
-    set -e
-    remote_machine=$1
-    tilt_port=''${2:-10350}
-
-    explorer_port=''${EXPLORER_PORT:-8001}
-    guardian_grpc_port=''${GUARDIAN_GRPC_PORT:-8080}
-    eth_jsonrpc_port=''${ETH_JSONRPC_PORT:-8545}
-    envoy_admin_port=''${ENVOY_PROXY_ADMIN_PORT:-9901}
-
-    # Use Mutagen to watch local repo and sync it with remote_machine's ~/wormhole
-    ${final.mutagen}/bin/mutagen sync terminate whremote-sync || true
-    ${final.mutagen}/bin/mutagen sync create -n whremote-sync . $remote_machine:~/wormhole
-    ${final.mutagen}/bin/mutagen sync flush whremote-sync
-
-    # Use larger cpu-count and memory values on the remote
-    export MINIKUBE_ARGS=''${MINIKUBE_ARGS:='--cpus=30 --memory=110g --disk-size=500gb --driver=kvm2 -p minikube-$USER'}
-
-    # Set up/update the remote minikube cluster with whcluster
-    ssh $remote_machine \
-      ". ~/.bash_profile; . ~/.zprofile; . ~/.profile; \
-       cd wormhole && \
-       nix-shell --option sandbox false --command ' MINIKUBE_ARGS=\"$MINIKUBE_ARGS\" whcluster'"
-
-    # Run tilt using whtilt on the remote and forward its default port to localhost
-    ssh \
-      -L $tilt_port:127.0.0.1:$tilt_port \
-      -L $explorer_port:127.0.0.1:$explorer_port \
-      -L $guardian_grpc_port:127.0.0.1:$guardian_grpc_port \
-      -L $eth_jsonrpc_port:127.0.0.1:$eth_jsonrpc_port \
-      -L $envoy_admin_port:127.0.0.1:$envoy_admin_port \
-      $remote_machine \
-      ". ~/.bash_profile; . ~/.zprofile; . ~/.profile; \
-        cd wormhole && \
-        nix-shell --option sandbox false --command 'whtilt $tilt_port $n_guardians'"
-  '';
-}
diff --git a/nix/sources.json b/nix/sources.json
deleted file mode 100644
index 2c82c8b95..000000000
--- a/nix/sources.json
+++ /dev/null
@@ -1,50 +0,0 @@
-{
-    "cargo2nix": {
-        "branch": "master",
-        "description": "Build Rust crates with Nix",
-        "homepage": "",
-        "owner": "cargo2nix",
-        "repo": "cargo2nix",
-        "rev": "c491edfb1b2721c8202afe4051ce7b44adfb668d",
-        "sha256": "0aby21f72314qfmkqcdv7wpw6cywn7isr7gsh8gz992cn2szjpg4",
-        "type": "tarball",
-        "url": "https://github.com/cargo2nix/cargo2nix/archive/c491edfb1b2721c8202afe4051ce7b44adfb668d.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
-    },
-    "niv": {
-        "branch": "master",
-        "description": "Easy dependency management for Nix projects",
-        "homepage": "https://github.com/nmattia/niv",
-        "owner": "nmattia",
-        "repo": "niv",
-        "rev": "e0ca65c81a2d7a4d82a189f1e23a48d59ad42070",
-        "sha256": "1pq9nh1d8nn3xvbdny8fafzw87mj7gsmp6pxkdl65w2g18rmcmzx",
-        "type": "tarball",
-        "url": "https://github.com/nmattia/niv/archive/e0ca65c81a2d7a4d82a189f1e23a48d59ad42070.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
-    },
-    "nixpkgs": {
-        "branch": "release-21.05",
-        "description": "Nix Packages collection",
-        "homepage": "",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "9d6766c0f0b3b03bd63ffc08b2e23e476145719d",
-        "sha256": "1hsr5zcmvbakpvzj1b5d2vz7195mbhvv58slplgwglxq8glnl9ff",
-        "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/9d6766c0f0b3b03bd63ffc08b2e23e476145719d.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
-    },
-    "rust-overlay": {
-        "branch": "master",
-        "description": "Pure and reproducible nix overlay for binary distributed rust toolchains",
-        "homepage": "",
-        "owner": "oxalica",
-        "repo": "rust-overlay",
-        "rev": "a3873f83ed5fe58c4c6af09700d27b54aa19b986",
-        "sha256": "07hll4yalziyzd68gg518kmxs6y31bb2y3ilp1hw4lpbj1jyj4k7",
-        "type": "tarball",
-        "url": "https://github.com/oxalica/rust-overlay/archive/a3873f83ed5fe58c4c6af09700d27b54aa19b986.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
-    }
-}
diff --git a/nix/sources.nix b/nix/sources.nix
deleted file mode 100644
index 1938409dd..000000000
--- a/nix/sources.nix
+++ /dev/null
@@ -1,174 +0,0 @@
-# This file has been generated by Niv.
-
-let
-
-  #
-  # The fetchers. fetch_<type> fetches specs of type <type>.
-  #
-
-  fetch_file = pkgs: name: spec:
-    let
-      name' = sanitizeName name + "-src";
-    in
-      if spec.builtin or true then
-        builtins_fetchurl { inherit (spec) url sha256; name = name'; }
-      else
-        pkgs.fetchurl { inherit (spec) url sha256; name = name'; };
-
-  fetch_tarball = pkgs: name: spec:
-    let
-      name' = sanitizeName name + "-src";
-    in
-      if spec.builtin or true then
-        builtins_fetchTarball { name = name'; inherit (spec) url sha256; }
-      else
-        pkgs.fetchzip { name = name'; inherit (spec) url sha256; };
-
-  fetch_git = name: spec:
-    let
-      ref =
-        if spec ? ref then spec.ref else
-          if spec ? branch then "refs/heads/${spec.branch}" else
-            if spec ? tag then "refs/tags/${spec.tag}" else
-              abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!";
-    in
-      builtins.fetchGit { url = spec.repo; inherit (spec) rev; inherit ref; };
-
-  fetch_local = spec: spec.path;
-
-  fetch_builtin-tarball = name: throw
-    ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`.
-        $ niv modify ${name} -a type=tarball -a builtin=true'';
-
-  fetch_builtin-url = name: throw
-    ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`.
-        $ niv modify ${name} -a type=file -a builtin=true'';
-
-  #
-  # Various helpers
-  #
-
-  # https://github.com/NixOS/nixpkgs/pull/83241/files#diff-c6f540a4f3bfa4b0e8b6bafd4cd54e8bR695
-  sanitizeName = name:
-    (
-      concatMapStrings (s: if builtins.isList s then "-" else s)
-        (
-          builtins.split "[^[:alnum:]+._?=-]+"
-            ((x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0) name)
-        )
-    );
-
-  # The set of packages used when specs are fetched using non-builtins.
-  mkPkgs = sources: system:
-    let
-      sourcesNixpkgs =
-        import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { inherit system; };
-      hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath;
-      hasThisAsNixpkgsPath = <nixpkgs> == ./.;
-    in
-      if builtins.hasAttr "nixpkgs" sources
-      then sourcesNixpkgs
-      else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then
-        import <nixpkgs> {}
-      else
-        abort
-          ''
-            Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or
-            add a package called "nixpkgs" to your sources.json.
-          '';
-
-  # The actual fetching function.
-  fetch = pkgs: name: spec:
-
-    if ! builtins.hasAttr "type" spec then
-      abort "ERROR: niv spec ${name} does not have a 'type' attribute"
-    else if spec.type == "file" then fetch_file pkgs name spec
-    else if spec.type == "tarball" then fetch_tarball pkgs name spec
-    else if spec.type == "git" then fetch_git name spec
-    else if spec.type == "local" then fetch_local spec
-    else if spec.type == "builtin-tarball" then fetch_builtin-tarball name
-    else if spec.type == "builtin-url" then fetch_builtin-url name
-    else
-      abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
-
-  # If the environment variable NIV_OVERRIDE_${name} is set, then use
-  # the path directly as opposed to the fetched source.
-  replace = name: drv:
-    let
-      saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name;
-      ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}";
-    in
-      if ersatz == "" then drv else
-        # this turns the string into an actual Nix path (for both absolute and
-        # relative paths)
-        if builtins.substring 0 1 ersatz == "/" then /. + ersatz else /. + builtins.getEnv "PWD" + "/${ersatz}";
-
-  # Ports of functions for older nix versions
-
-  # a Nix version of mapAttrs if the built-in doesn't exist
-  mapAttrs = builtins.mapAttrs or (
-    f: set: with builtins;
-    listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
-  );
-
-  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295
-  range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1);
-
-  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257
-  stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1));
-
-  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
-  stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
-  concatMapStrings = f: list: concatStrings (map f list);
-  concatStrings = builtins.concatStringsSep "";
-
-  # https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331
-  optionalAttrs = cond: as: if cond then as else {};
-
-  # fetchTarball version that is compatible between all the versions of Nix
-  builtins_fetchTarball = { url, name ? null, sha256 }@attrs:
-    let
-      inherit (builtins) lessThan nixVersion fetchTarball;
-    in
-      if lessThan nixVersion "1.12" then
-        fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
-      else
-        fetchTarball attrs;
-
-  # fetchurl version that is compatible between all the versions of Nix
-  builtins_fetchurl = { url, name ? null, sha256 }@attrs:
-    let
-      inherit (builtins) lessThan nixVersion fetchurl;
-    in
-      if lessThan nixVersion "1.12" then
-        fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
-      else
-        fetchurl attrs;
-
-  # Create the final "sources" from the config
-  mkSources = config:
-    mapAttrs (
-      name: spec:
-        if builtins.hasAttr "outPath" spec
-        then abort
-          "The values in sources.json should not have an 'outPath' attribute"
-        else
-          spec // { outPath = replace name (fetch config.pkgs name spec); }
-    ) config.sources;
-
-  # The "config" used by the fetchers
-  mkConfig =
-    { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null
-    , sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile)
-    , system ? builtins.currentSystem
-    , pkgs ? mkPkgs sources system
-    }: rec {
-      # The sources, i.e. the attribute set of spec name to spec
-      inherit sources;
-
-      # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
-      inherit pkgs;
-    };
-
-in
-mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }
diff --git a/nix/tilt.nix b/nix/tilt.nix
deleted file mode 100644
index c7e6f016a..000000000
--- a/nix/tilt.nix
+++ /dev/null
@@ -1,31 +0,0 @@
-{ lib, buildGoModule, fetchFromGitHub, makeWrapper}:
-
-buildGoModule rec {
-  pname = "tilt";
-  /* Do not use "dev" as a version. If you do, Tilt will consider itself
-    running in development environment and try to serve assets from the
-    source tree, which is not there once build completes.  */
-  version = "0.22.5";
-
-  src = fetchFromGitHub {
-    owner = "tilt-dev";
-    repo = pname;
-    rev = "39122ff70"; # right after v0.22.5
-    sha256 = null;
-  };
-  vendorSha256 = null;
-
-  subPackages = [ "cmd/tilt" ];
-
-  buildInputs = [makeWrapper];
-
-  meta = with lib; {
-    description = "Local development tool to manage your developer instance when your team deploys to Kubernetes in production";
-    homepage = "https://tilt.dev/";
-    license = licenses.asl20;
-    maintainers = with maintainers; [ anton-dessiatov ];
-  };
-  doCheck = false;
-  # Explicitly ask to use the upstream-hosted web assets
-  postFixup = "wrapProgram $out/bin/tilt --set TILT_WEB_MODE prod";
-}
diff --git a/nix/xargo.nix b/nix/xargo.nix
deleted file mode 100644
index e47e577ad..000000000
--- a/nix/xargo.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-{ rust ? import ./rust.nix }: (
-  self: super: {
-    xargo = self.rustPlatform.buildRustPackage rec {
-      pname = "xargo";
-      src = self.fetchFromGitHub {
-        owner = "japaric";
-        repo = pname;
-      };
-      cargoSha256 = "unset";
-      meta = with self.lib; {
-        description = "The rust cross-compilation tool";
-        homepage = "https://github.com/japaric/xargo";
-        maintainers = maintainers.tailhook;
-      };
-    };
-  }
-)
diff --git a/shell.nix b/shell.nix
deleted file mode 100644
index b47ec9fa0..000000000
--- a/shell.nix
+++ /dev/null
@@ -1,62 +0,0 @@
-{ sources ? import nix/sources.nix # Please specify inputs obtained from `sources` as separate params like below
-, cargo2nix ? sources.cargo2nix
-, nixpkgs ? sources.nixpkgs
-, rust-olay ? import sources.rust-overlay
-}:
-let
-  scripts-olay = import ./nix/scripts.nix;
-  cargo2nix-olay = import "${cargo2nix}/overlay";
-  tilt-olay = final: prev: {
-    tilt = prev.callPackage ./nix/tilt.nix {};
-  };
-  pkgs = import nixpkgs {
-    overlays = [
-      # cargo2nix-olay
-      rust-olay
-      tilt-olay
-      scripts-olay
-    ];
-  };
-  cargo2nix-drv = import cargo2nix {
-    inherit nixpkgs;
-  };
-in
-pkgs.mkShell {
-  nativeBuildInputs = (
-    with pkgs; [
-      go-ethereum
-      go
-      gopls
-      hidapi
-      libudev
-      niv
-      nodejs-16_x
-      openssl
-      pkgconfig
-      protobuf
-      python3
-      python3Packages.autopep8
-      whcluster
-      whinotify
-      whkube
-      whtilt
-      whremote
-      # (
-      #   rust-bin.stable."1.51.0".default.override {
-      #     extensions = [
-      #       "rust-src"
-      #       "rust-analysis"
-      #     ];
-      #   }
-      # )
-      # Provided on Fedora:
-      kubectl
-      minikube
-      tilt
-      # xargo
-    ]
-  );
-  DOCKER_BUILDKIT = 1;
-  PROTOC = "${pkgs.protobuf}/bin/protoc";
-  EMITTER_ADDRESS = "changeme";
-}