diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 538bc0404..9125e3282 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,6 +45,8 @@ jobs:
 
       - name: Build
         run: npm run build
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Test
         run: npm run test
@@ -95,9 +97,6 @@ jobs:
       - name: Install dependencies
         run: npm ci --prefer-offline --no-audit --progress=false --cache ${{ github.workspace }}/.cache/npm
 
-      - name: Build
-        run: npm run build
-
       - name: Get tag
         id: tag
         if: startsWith(github.ref, 'refs/tags/v')
@@ -123,6 +122,7 @@ jobs:
           # Apple notarization
           APPLEID: ${{ secrets.apple_id }}
           APPLEIDPASS: ${{ secrets.apple_id_pass }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Show dist/
         run: du -sh dist/ && ls -l dist/
diff --git a/.gitignore b/.gitignore
index 8530c142d..b018dc184 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,3 +31,5 @@ dev-app-update.yml
 *.njsproj
 *.sln
 *.sw?
+
+build/saturn
diff --git a/build/download-saturn-l2.js b/build/download-saturn-l2.js
new file mode 100755
index 000000000..35eefd3c8
--- /dev/null
+++ b/build/download-saturn-l2.js
@@ -0,0 +1,112 @@
+#!/usr/bin/env -S node
+
+'use strict'
+
+const SATURN_DIST_TAG = 'v0.0.2'
+
+const { mkdir } = require('node:fs/promises')
+const path = require('node:path')
+const tar = require('tar-fs')
+const gunzip = require('gunzip-maybe')
+const { request } = require('undici')
+const { pipeline } = require('node:stream/promises')
+
+const githubToken = process.env.GITHUB_TOKEN
+const authorization = githubToken ? `Bearer ${githubToken}` : undefined
+
+main().catch(err => {
+  console.error('Unhandled error:', err)
+  process.exit(1)
+})
+
+async function main () {
+  console.log('Fetching release metadata for %s', SATURN_DIST_TAG)
+  console.log('GitHub client:', authorization ? 'authorized' : 'anonymous')
+
+  const { assets } = await fetchReleaseMetadata()
+
+  const outDir = path.resolve(__dirname, 'saturn')
+  await mkdir(outDir, { recursive: true })
+
+  await Promise.all(
+    assets
+      .map(async ({ name, browser_download_url: url }) => {
+        const match = name.match(/^saturn-l2_\d+\.\d+\.\d+_([A-Za-z0-9]+)_([A-Za-z0-9_]+)\.tar\.gz$/)
+        const platform = match && getPlatform(match[1])
+        if (!match || platform !== process.platform) {
+          console.log(' ⨯ skipping %s', name)
+          return
+        }
+
+        const outName = `l2node-${platform}-${getArch(match[2])}`
+        console.log(' ⇣ downloading %s', outName)
+        const res = await request(url, {
+          headers: { authorization },
+          maxRedirections: 5
+        })
+
+        if (res.statusCode >= 300) {
+          throw new Error(
+            `Cannot fetch saturn-l2 binary ${name}: ${res.statusCode}\n${await res.body.text()}`
+          )
+        }
+
+        const outFile = path.join(outDir, outName)
+        await pipeline(res.body, gunzip(), tar.extract(outFile))
+        console.log(' ✓ %s', outFile)
+      })
+  )
+
+  console.log('✨ DONE ✨')
+}
+
+/**
+ * @returns {Promise<{
+ *  assets: {name:string, browser_download_url: string}[];
+ * }>}
+ */
+async function fetchReleaseMetadata () {
+  const res = await request(
+    `https://api.github.com/repos/filecoin-project/saturn-l2/releases/tags/${SATURN_DIST_TAG}`,
+    {
+      headers: {
+        accept: 'application/vnd.github.v3+json',
+        'user-agent': 'undici',
+        authorization
+      }
+    }
+  )
+  if (res.statusCode >= 300) {
+    throw new Error(`Cannot fetch saturn-l2 release ${SATURN_DIST_TAG}: ${res.statusCode}\n${await res.body.text()}`)
+  }
+  const data = await res.body.json()
+  return data
+}
+
+/**
+ * @param {string} golangOs
+ */
+function getPlatform (golangOs) {
+  switch (golangOs) {
+    case 'Windows': return 'win32'
+    case 'Linux': return 'linux'
+    case 'Darwin': return 'darwin'
+  }
+  throw new Error(`Unkown OS string: ${golangOs}`)
+}
+
+/**
+ * @param {string} golangArch
+ */
+function getArch (golangArch) {
+  switch (golangArch) {
+    case 'x86_64':
+      return 'x64'
+    case 'i386':
+      return 'ia32'
+    case 'arm64':
+      return 'arm64'
+  }
+
+  throw new Error(`Unkown ARCH string: ${golangArch}`)
+}
diff --git a/build/notarize-macos.js b/build/notarize-macos.js
index 99c2086fa..f44c92cd3 100644
--- a/build/notarize-macos.js
+++ b/build/notarize-macos.js
@@ -1,8 +1,12 @@
 const { notarize } = require('electron-notarize')
 
-const isSet = (value) => value && value !== 'false'
+const isSet = (/** @type {string | undefined} */ value) => value && value !== 'false'
 
-// electron-build hook responsible for Apple Notarization of signed DMG
+/**
+ * electron-build hook responsible for Apple Notarization of signed DMG
+ *
+ * @param {import('electron-builder').AfterPackContext} context
+ */
 exports.default = async function notarizing (context) {
   const { electronPlatformName, appOutDir } = context
   if (electronPlatformName !== 'darwin') return
diff --git a/electron-builder.yml b/electron-builder.yml
index 714f7e748..ec089bb95 100644
--- a/electron-builder.yml
+++ b/electron-builder.yml
@@ -9,6 +9,11 @@ files:
     - node_modules/**/*
     - package.json
 
+extraResources:
+  - from: 'build/saturn/l2node-${platform}-${arch}'
+    to: 'saturn-l2-node'
+    filter: ['*']
+
 asarUnpack: 'main/**/scripts/**/*'
 
 afterSign: 'build/notarize-macos.js'
diff --git a/main/index.js b/main/index.js
index 6f7ba2df3..0e377d80e 100644
--- a/main/index.js
+++ b/main/index.js
@@ -6,6 +6,7 @@ const path = require('node:path')
 const setupUI = require('./ui')
 const setupTray = require('./tray')
 const setupUpdater = require('./updater')
+const setupSaturnNode = require('./saturn-node')
 
 const inTest = (process.env.NODE_ENV === 'test')
 
@@ -49,6 +50,8 @@ async function run () {
     await setupTray(ctx)
     await setupUI(ctx)
     await setupUpdater(ctx)
+
+    await setupSaturnNode(ctx)
   } catch (e) {
     handleError(e)
   }
diff --git a/main/saturn-node.js b/main/saturn-node.js
new file mode 100644
index 000000000..34150b584
--- /dev/null
+++ b/main/saturn-node.js
@@ -0,0 +1,24 @@
+'use strict'
+
+const { app } = require('electron')
+const path = require('path')
+const fs = require('node:fs/promises')
+
+module.exports = async function setupSaturnNode (/** @type {import('./typings').Context} */ ctx) {
+  const saturnBinaryPath = getSaturnBinaryPath()
+  console.log('Using Saturn L2 Node binary: %s', saturnBinaryPath)
+
+  const stat = await fs.stat(saturnBinaryPath)
+  if (!stat) {
+    throw new Error(`Invalid configuration or deployment. Saturn L2 Node was not found: ${saturnBinaryPath}`)
+  }
+
+  console.log('todo: start saturn node')
+}
+
+function getSaturnBinaryPath () {
+  const name = 'saturn-l2' + (process.platform === 'win32' ? '.exe' : '')
+  return app.isPackaged
+    ? path.resolve(process.resourcesPath, 'saturn-l2-node', name)
+    : path.resolve(__dirname, '..', 'build', 'saturn', `l2node-${process.platform}-${process.arch}`, name)
+}
diff --git a/package-lock.json b/package-lock.json
index 72e353efd..31a7fe66d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,12 +16,15 @@
         "electron-updater": "^5.0.1",
         "react": "^18.0.0",
         "react-dom": "^18.0.0",
-        "react-router-dom": "^6.3.0"
+        "react-router-dom": "^6.3.0",
+        "tar-fs": "^2.1.1"
       },
       "devDependencies": {
         "@playwright/test": "^1.22.2",
+        "@types/gunzip-maybe": "^1.4.0",
         "@types/react": "^18.0.0",
         "@types/react-dom": "^18.0.0",
+        "@types/tar-fs": "^2.0.1",
         "@types/tmp": "^0.2.3",
         "@typescript-eslint/experimental-utils": "^5.26.0",
         "@vitejs/plugin-react": "^1.3.0",
@@ -30,12 +33,14 @@
         "electron-builder": "^23.0.3",
         "electron-devtools-installer": "^3.2.0",
         "electron-notarize": "^1.2.1",
+        "gunzip-maybe": "^1.4.2",
         "npm-run-all": "^4.1.5",
         "playwright": "^1.22.2",
         "shx": "^0.3.4",
         "tmp": "^0.2.1",
         "ts-standard": "^11.0.0",
         "typescript": "^4.7.2",
+        "undici": "^5.4.0",
         "vite": "^2.9.9",
         "xvfb-maybe": "^0.2.1"
       }
@@ -923,6 +928,15 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/gunzip-maybe": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/@types/gunzip-maybe/-/gunzip-maybe-1.4.0.tgz",
+      "integrity": "sha512-dFP9GrYAR9KhsjTkWJ8q8Gsfql75YIKcg9DuQOj/IrlPzR7W+1zX+cclw1McV82UXAQ+Lpufvgk3e9bC8+HzgA==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/json-schema": {
       "version": "7.0.11",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.11.tgz",
@@ -1002,6 +1016,25 @@
       "resolved": "https://registry.npmjs.org/@types/semver/-/semver-7.3.9.tgz",
       "integrity": "sha512-L/TMpyURfBkf+o/526Zb6kd/tchUP3iBDEPjqjb+U2MAJhVRxxrmr2fwpe08E7QsV7YLcpq0tUaQ9O9x97ZIxQ=="
     },
+    "node_modules/@types/tar-fs": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/@types/tar-fs/-/tar-fs-2.0.1.tgz",
+      "integrity": "sha512-qlsQyIY9sN7p221xHuXKNoMfUenOcvEBN4zI8dGsYbYCqHtTarXOEXSIgUnK+GcR0fZDse6pAIc5pIrCh9NefQ==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*",
+        "@types/tar-stream": "*"
+      }
+    },
+    "node_modules/@types/tar-stream": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/@types/tar-stream/-/tar-stream-2.2.2.tgz",
+      "integrity": "sha512-1AX+Yt3icFuU6kxwmPakaiGrJUwG44MpuiqPg4dSolRFk6jmvs4b3IbUol9wKDLIgU76gevn3EwE8y/DkSJCZQ==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/tmp": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/@types/tmp/-/tmp-0.2.3.tgz",
@@ -1788,7 +1821,6 @@
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
       "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==",
-      "dev": true,
       "funding": [
         {
           "type": "github",
@@ -1804,6 +1836,29 @@
         }
       ]
     },
+    "node_modules/bl": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
+      "integrity": "sha512-1W07cM9gS6DcLperZfFSj+bWLtaPGSOHWhPiGzXmvVJbRLdG82sH/Kn8EtW1VqWVA54AKf2h5k5BbnIbwF3h6w==",
+      "dependencies": {
+        "buffer": "^5.5.0",
+        "inherits": "^2.0.4",
+        "readable-stream": "^3.4.0"
+      }
+    },
+    "node_modules/bl/node_modules/readable-stream": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+      "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/bluebird": {
       "version": "3.7.2",
       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
@@ -1952,6 +2007,21 @@
         "node": ">=8"
       }
     },
+    "node_modules/browserify-zlib": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/browserify-zlib/-/browserify-zlib-0.1.4.tgz",
+      "integrity": "sha512-19OEpq7vWgsH6WkvkBJQDFvJS1uPcbFOQ4v9CU839dO+ZZXUZO6XpE6hNCqvlIIj+4fZvRiJ6DsAQ382GwiyTQ==",
+      "dev": true,
+      "dependencies": {
+        "pako": "~0.2.0"
+      }
+    },
+    "node_modules/browserify-zlib/node_modules/pako": {
+      "version": "0.2.9",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-0.2.9.tgz",
+      "integrity": "sha512-NUcwaKxUxWrZLpDG+z/xZaCgQITkA/Dv4V/T6bw7VON6l1Xz/VnrBqrYjZQ12TamKHzITTfOEIYUj48y2KXImA==",
+      "dev": true
+    },
     "node_modules/browserslist": {
       "version": "4.20.3",
       "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.20.3.tgz",
@@ -1985,7 +2055,6 @@
       "version": "5.7.1",
       "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
       "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
-      "dev": true,
       "funding": [
         {
           "type": "github",
@@ -2000,7 +2069,6 @@
           "url": "https://feross.org/support"
         }
       ],
-      "optional": true,
       "dependencies": {
         "base64-js": "^1.3.1",
         "ieee754": "^1.1.13"
@@ -2863,6 +2931,18 @@
       "integrity": "sha512-CEj8FwwNA4cVH2uFCoHUrmojhYh1vmCdOaneKJXwkeY1i9jnlslVo9dx+hQ5Hl9GnH/Bwy/IjxAyOePyPKYnzA==",
       "dev": true
     },
+    "node_modules/duplexify": {
+      "version": "3.7.1",
+      "resolved": "https://registry.npmjs.org/duplexify/-/duplexify-3.7.1.tgz",
+      "integrity": "sha512-07z8uv2wMyS51kKhD1KsdXJg5WQ6t93RneqRxUHnskXVtlYYkLqM0gqStQZ3pj073g687jPCHrqNfCzawLYh5g==",
+      "dev": true,
+      "dependencies": {
+        "end-of-stream": "^1.0.0",
+        "inherits": "^2.0.1",
+        "readable-stream": "^2.0.0",
+        "stream-shift": "^1.0.0"
+      }
+    },
     "node_modules/ejs": {
       "version": "3.1.8",
       "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.8.tgz",
@@ -3358,7 +3438,6 @@
       "version": "1.4.4",
       "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.4.tgz",
       "integrity": "sha512-+uw1inIHVPQoaVuHzRyXd21icM+cnt4CzD5rW+NC1wjOUSTOs+Te7FOv7AhN7vS9x/oIyhLP5PR1H+phQAHu5Q==",
-      "dev": true,
       "dependencies": {
         "once": "^1.4.0"
       }
@@ -4829,6 +4908,11 @@
         "node": ">= 6"
       }
     },
+    "node_modules/fs-constants": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/fs-constants/-/fs-constants-1.0.0.tgz",
+      "integrity": "sha512-y6OAwoSIf7FyjMIv94u+b5rdheZEjzR63GTyZJm5qh4Bi+2YgwLCcI/fPFZkL5PSixOt6ZNKm+w+Hfp/Bciwow=="
+    },
     "node_modules/fs-extra": {
       "version": "8.1.0",
       "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.1.0.tgz",
@@ -5142,6 +5226,23 @@
       "integrity": "sha512-8tLu60LgxF6XpdbK8OW3FA+IfTNBn1ZHGHKF4KQbEeSkajYw5PlYJcKluntgegDPTg8UkHjpet1T82vk6TQ68w==",
       "dev": true
     },
+    "node_modules/gunzip-maybe": {
+      "version": "1.4.2",
+      "resolved": "https://registry.npmjs.org/gunzip-maybe/-/gunzip-maybe-1.4.2.tgz",
+      "integrity": "sha512-4haO1M4mLO91PW57BMsDFf75UmwoRX0GkdD+Faw+Lr+r/OZrOCS0pIBwOL1xCKQqnQzbNFGgK2V2CpBUPeFNTw==",
+      "dev": true,
+      "dependencies": {
+        "browserify-zlib": "^0.1.4",
+        "is-deflate": "^1.0.0",
+        "is-gzip": "^1.0.0",
+        "peek-stream": "^1.1.0",
+        "pumpify": "^1.3.3",
+        "through2": "^2.0.3"
+      },
+      "bin": {
+        "gunzip-maybe": "bin.js"
+      }
+    },
     "node_modules/has": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/has/-/has-1.0.3.tgz",
@@ -5306,7 +5407,6 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
       "integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA==",
-      "dev": true,
       "funding": [
         {
           "type": "github",
@@ -5320,8 +5420,7 @@
           "type": "consulting",
           "url": "https://feross.org/support"
         }
-      ],
-      "optional": true
+      ]
     },
     "node_modules/ignore": {
       "version": "5.2.0",
@@ -5385,8 +5484,7 @@
     "node_modules/inherits": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
-      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
-      "dev": true
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
     },
     "node_modules/ini": {
       "version": "1.3.8",
@@ -5502,6 +5600,12 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/is-deflate": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/is-deflate/-/is-deflate-1.0.0.tgz",
+      "integrity": "sha512-YDoFpuZWu1VRXlsnlYMzKyVRITXj7Ej/V9gXQ2/pAe7X1J7M/RNOqaIYi6qUn+B7nGyB9pDXrv02dsB58d2ZAQ==",
+      "dev": true
+    },
     "node_modules/is-extglob": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-2.1.1.tgz",
@@ -5532,6 +5636,15 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/is-gzip": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/is-gzip/-/is-gzip-1.0.0.tgz",
+      "integrity": "sha512-rcfALRIb1YewtnksfRIHGcIY93QnK8BIQ/2c9yDYcG/Y6+vRoJuTWBmmSEbyLLYtXm7q35pHOHbZFQBaLrhlWQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/is-installed-globally": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/is-installed-globally/-/is-installed-globally-0.4.0.tgz",
@@ -6212,6 +6325,11 @@
         "mkdirp": "bin/cmd.js"
       }
     },
+    "node_modules/mkdirp-classic": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz",
+      "integrity": "sha512-gKLcREMhtuZRwRAfqP3RFW+TK4JqApVBtOIftVgjuABpAtpxhPGaDcfvbhNvD0B8iD1oUr/txX35NjcaY6Ns/A=="
+    },
     "node_modules/ms": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
@@ -6506,7 +6624,6 @@
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
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         "minimist": "^1.2.6"
       }
     },
+    "mkdirp-classic": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz",
+      "integrity": "sha512-gKLcREMhtuZRwRAfqP3RFW+TK4JqApVBtOIftVgjuABpAtpxhPGaDcfvbhNvD0B8iD1oUr/txX35NjcaY6Ns/A=="
+    },
     "ms": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
@@ -13405,7 +13735,6 @@
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
       "integrity": "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==",
-      "dev": true,
       "requires": {
         "wrappy": "1"
       }
@@ -13540,6 +13869,17 @@
       "integrity": "sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==",
       "dev": true
     },
+    "peek-stream": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/peek-stream/-/peek-stream-1.1.3.tgz",
+      "integrity": "sha512-FhJ+YbOSBb9/rIl2ZeE/QHEsWn7PqNYt8ARAY3kIgNGOk13g9FGyIY6JIl/xB/3TFRVoTv5as0l11weORrTekA==",
+      "dev": true,
+      "requires": {
+        "buffer-from": "^1.0.0",
+        "duplexify": "^3.5.0",
+        "through2": "^2.0.3"
+      }
+    },
     "pend": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz",
@@ -13705,12 +14045,34 @@
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
       "integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==",
-      "dev": true,
       "requires": {
         "end-of-stream": "^1.1.0",
         "once": "^1.3.1"
       }
     },
+    "pumpify": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/pumpify/-/pumpify-1.5.1.tgz",
+      "integrity": "sha512-oClZI37HvuUJJxSKKrC17bZ9Cu0ZYhEAGPsPUy9KlMUmv9dKX2o77RUmq7f3XjIxbwyGwYzbzQ1L2Ks8sIradQ==",
+      "dev": true,
+      "requires": {
+        "duplexify": "^3.6.0",
+        "inherits": "^2.0.3",
+        "pump": "^2.0.0"
+      },
+      "dependencies": {
+        "pump": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/pump/-/pump-2.0.1.tgz",
+          "integrity": "sha512-ruPMNRkN3MHP1cWJc9OWr+T/xDP0jhXYCLfJcBuX54hhfIBnaQmAUMfDcG4DM5UMWByBbJY69QSphm3jtDKIkA==",
+          "dev": true,
+          "requires": {
+            "end-of-stream": "^1.1.0",
+            "once": "^1.3.1"
+          }
+        }
+      }
+    },
     "punycode": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
@@ -13984,8 +14346,7 @@
     "safe-buffer": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
-      "dev": true
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
     },
     "safer-buffer": {
       "version": "2.1.2",
@@ -14264,11 +14625,16 @@
       "integrity": "sha512-jH9EhtKIjuXZ2cWxmXS8ZP80XyC3iasQxMDV8jzhNJpfDb7VbQLVW4Wvsxz9QZvzV+G4YoSfBUVKDOyxLzi/sg==",
       "dev": true
     },
+    "stream-shift": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/stream-shift/-/stream-shift-1.0.1.tgz",
+      "integrity": "sha512-AiisoFqQ0vbGcZgQPY1cdP2I76glaVA/RauYR4G4thNFgkTqr90yXTo4LYX60Jl+sIlPNHHdGSwo01AvbKUSVQ==",
+      "dev": true
+    },
     "string_decoder": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
       "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
-      "dev": true,
       "requires": {
         "safe-buffer": "~5.1.0"
       }
@@ -14446,6 +14812,48 @@
         }
       }
     },
+    "tar-fs": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.1.1.tgz",
+      "integrity": "sha512-V0r2Y9scmbDRLCNex/+hYzvp/zyYjvFbHPNgVTKfQvVrb6guiE/fxP+XblDNR011utopbkex2nM4dHNV6GDsng==",
+      "requires": {
+        "chownr": "^1.1.1",
+        "mkdirp-classic": "^0.5.2",
+        "pump": "^3.0.0",
+        "tar-stream": "^2.1.4"
+      },
+      "dependencies": {
+        "chownr": {
+          "version": "1.1.4",
+          "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.4.tgz",
+          "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg=="
+        }
+      }
+    },
+    "tar-stream": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.2.0.tgz",
+      "integrity": "sha512-ujeqbceABgwMZxEJnk2HDY2DlnUZ+9oEcb1KzTVfYHio0UE6dG71n60d8D2I4qNvleWrrXpmjpt7vZeF1LnMZQ==",
+      "requires": {
+        "bl": "^4.0.3",
+        "end-of-stream": "^1.4.1",
+        "fs-constants": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^3.1.1"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "3.6.0",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
+          "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+          "requires": {
+            "inherits": "^2.0.3",
+            "string_decoder": "^1.1.1",
+            "util-deprecate": "^1.0.1"
+          }
+        }
+      }
+    },
     "temp-file": {
       "version": "3.4.0",
       "resolved": "https://registry.npmjs.org/temp-file/-/temp-file-3.4.0.tgz",
@@ -14491,6 +14899,16 @@
       "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=",
       "dev": true
     },
+    "through2": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.5.tgz",
+      "integrity": "sha512-/mrRod8xqpA+IHSLyGCQ2s8SPHiCDEeQJSep1jqLYeEUClOFG2Qsh+4FU6G9VeqpZnGW/Su8LQGc4YKni5rYSQ==",
+      "dev": true,
+      "requires": {
+        "readable-stream": "~2.3.6",
+        "xtend": "~4.0.1"
+      }
+    },
     "tmp": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.2.1.tgz",
@@ -14660,6 +15078,12 @@
         "which-boxed-primitive": "^1.0.2"
       }
     },
+    "undici": {
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-5.4.0.tgz",
+      "integrity": "sha512-A1SRXysDg7J+mVP46jF+9cKANw0kptqSFZ8tGyL+HBiv0K1spjxPX8Z4EGu+Eu6pjClJUBdnUPlxrOafR668/g==",
+      "dev": true
+    },
     "unique-string": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/unique-string/-/unique-string-2.0.0.tgz",
@@ -14800,8 +15224,7 @@
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
-      "dev": true
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
     },
     "v8-compile-cache": {
       "version": "2.3.0",
@@ -14930,8 +15353,7 @@
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-      "dev": true
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
     "write-file-atomic": {
       "version": "3.0.3",
@@ -14958,6 +15380,12 @@
       "dev": true,
       "optional": true
     },
+    "xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
+      "dev": true
+    },
     "xvfb-maybe": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/xvfb-maybe/-/xvfb-maybe-0.2.1.tgz",
diff --git a/package.json b/package.json
index e78e264b4..955275333 100644
--- a/package.json
+++ b/package.json
@@ -9,12 +9,13 @@
     "start": "cross-env NODE_ENV=development electron .",
     "lint": "ts-standard && tsc -p tsconfig.json && tsc -p renderer/tsconfig.json",
     "test": "run-s test:*",
-    "pretest:e2e": "run-s build",
     "test:e2e": "xvfb-maybe cross-env NODE_ENV=test playwright test 'test/e2e/.*.test.js'",
     "postinstall": "run-s install-app-deps",
     "install-app-deps": "electron-builder install-app-deps",
-    "clean": "shx echo \"clean here\"",
-    "build": "vite build",
+    "clean": "shx rm -rf dist/ build/saturn",
+    "build": "run-s clean build:*",
+    "build:webui": "vite build",
+    "build:saturn": "node ./build/download-saturn-l2.js",
     "package": "shx rm -rf dist/ && run-s build && electron-builder --publish onTag"
   },
   "repository": {
@@ -37,12 +38,15 @@
     "electron-updater": "^5.0.1",
     "react": "^18.0.0",
     "react-dom": "^18.0.0",
-    "react-router-dom": "^6.3.0"
+    "react-router-dom": "^6.3.0",
+    "tar-fs": "^2.1.1"
   },
   "devDependencies": {
     "@playwright/test": "^1.22.2",
+    "@types/gunzip-maybe": "^1.4.0",
     "@types/react": "^18.0.0",
     "@types/react-dom": "^18.0.0",
+    "@types/tar-fs": "^2.0.1",
     "@types/tmp": "^0.2.3",
     "@typescript-eslint/experimental-utils": "^5.26.0",
     "@vitejs/plugin-react": "^1.3.0",
@@ -51,12 +55,14 @@
     "electron-builder": "^23.0.3",
     "electron-devtools-installer": "^3.2.0",
     "electron-notarize": "^1.2.1",
+    "gunzip-maybe": "^1.4.2",
     "npm-run-all": "^4.1.5",
     "playwright": "^1.22.2",
     "shx": "^0.3.4",
     "tmp": "^0.2.1",
     "ts-standard": "^11.0.0",
     "typescript": "^4.7.2",
+    "undici": "^5.4.0",
     "vite": "^2.9.9",
     "xvfb-maybe": "^0.2.1"
   },
diff --git a/tsconfig.json b/tsconfig.json
index d33b7937f..b5515d114 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -20,6 +20,7 @@
   "include": [
     "**/*.d.ts",
     "main/**/*.js",
+    "build/**/*.js",
     "test/**/*.js",
     "vite.config.mjs",
   ]