diff --git a/.eslintrc.js b/.eslintrc.js
index e0cfec85..79ed811d 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -5,6 +5,7 @@ module.exports = {
   root: true,
 
   parserOptions: {
+    parser: require.resolve("@typescript-eslint/parser"),
     ecmaVersion: "2021", // Allows for the parsing of modern ECMAScript features
   },
 
diff --git a/.vscode/settings.json b/.vscode/settings.json
index bcfdd156..022fb962 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -14,8 +14,6 @@
     "**/Thumbs.db": true,
     ".editorconfig": true,
     ".eslintignore": true,
-    ".eslintrc.js": true,
-    ".gitignore": true,
     ".npmrc": true,
     ".postcssrc.js": true,
     ".quasar": true,
diff --git a/package-lock.json b/package-lock.json
index 98f2dfc1..69f0323a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -30,6 +30,9 @@
         "@quasar/app-vite": "^1.0.0",
         "@quasar/quasar-app-extension-testing": "^2.1.0",
         "@quasar/quasar-app-extension-testing-unit-vitest": "^0.2.1",
+        "@types/node": "^20.2.1",
+        "@typescript-eslint/eslint-plugin": "^5.59.6",
+        "@typescript-eslint/parser": "^5.59.6",
         "@vue/test-utils": "^2.0.0",
         "autoprefixer": "^10.4.14",
         "electron": "^23.1.1",
@@ -38,6 +41,7 @@
         "eslint-config-prettier": "^8.1.0",
         "eslint-plugin-vue": "^9.0.0",
         "prettier": "^2.5.1",
+        "typescript": "^5.0.4",
         "vitest": "^0.29.1",
         "workbox-build": "^6.5.4",
         "workbox-cacheable-response": "^6.5.4",
@@ -2161,6 +2165,42 @@
         "node": ">=12"
       }
     },
+    "node_modules/@eslint-community/eslint-utils": {
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.4.0.tgz",
+      "integrity": "sha512-1/sA4dwrzBAyeUoQ6oxahHKmrZvsnLCg4RfxW3ZFGGmQkSNQPFNLV9CUEFQP1x9EYXHTo5p6xdhZM1Ne9p/AfA==",
+      "dev": true,
+      "dependencies": {
+        "eslint-visitor-keys": "^3.3.0"
+      },
+      "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      },
+      "peerDependencies": {
+        "eslint": "^6.0.0 || ^7.0.0 || >=8.0.0"
+      }
+    },
+    "node_modules/@eslint-community/eslint-utils/node_modules/eslint-visitor-keys": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-3.4.1.tgz",
+      "integrity": "sha512-pZnmmLwYzf+kWaM/Qgrvpen51upAktaaiI01nsJD/Yr3lMOdNtq0cxkrrg16w64VtisN6okbs7Q8AfGqj4c9fA==",
+      "dev": true,
+      "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/eslint"
+      }
+    },
+    "node_modules/@eslint-community/regexpp": {
+      "version": "4.5.1",
+      "resolved": "https://registry.npmjs.org/@eslint-community/regexpp/-/regexpp-4.5.1.tgz",
+      "integrity": "sha512-Z5ba73P98O1KUYCCJTUeVpja9RcGoMdncZ6T49FCUl2lN38JtCJ+3WgIDBv0AuY4WChU5PmtJmOCTlN6FZTFKQ==",
+      "dev": true,
+      "engines": {
+        "node": "^12.0.0 || ^14.0.0 || >=16.0.0"
+      }
+    },
     "node_modules/@eslint/eslintrc": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-1.4.1.tgz",
@@ -3117,6 +3157,12 @@
       "integrity": "sha512-SZs7ekbP8CN0txVG2xVRH6EgKmEm31BOxA07vkFaETzZz1xh+cbt8BcI0slpymvwhx5dlFnQG2rTlPVQn+iRPQ==",
       "dev": true
     },
+    "node_modules/@types/json-schema": {
+      "version": "7.0.11",
+      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.11.tgz",
+      "integrity": "sha512-wOuvG1SN4Us4rez+tylwwwCV1psiNVOkJeM3AUWUNWg/jDQY2+HE/444y5gc+jBmRqASOm2Oeh5c1axHobwRKQ==",
+      "dev": true
+    },
     "node_modules/@types/json5": {
       "version": "0.0.29",
       "resolved": "https://registry.npmjs.org/@types/json5/-/json5-0.0.29.tgz",
@@ -3146,9 +3192,9 @@
       "optional": true
     },
     "node_modules/@types/node": {
-      "version": "18.14.0",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.14.0.tgz",
-      "integrity": "sha512-5EWrvLmglK+imbCJY0+INViFWUHg1AHel1sq4ZVSfdcNqGy9Edv3UB9IIzzg+xPaUcAgZYcfVs2fBcwDeZzU0A==",
+      "version": "20.2.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.2.1.tgz",
+      "integrity": "sha512-DqJociPbZP1lbZ5SQPk4oag6W7AyaGMO6gSfRwq3PWl4PXTwJpRQJhDq4W0kzrg3w6tJ1SwlvGZ5uKFHY13LIg==",
       "dev": true
     },
     "node_modules/@types/qs": {
@@ -3181,6 +3227,12 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/semver": {
+      "version": "7.5.0",
+      "resolved": "https://registry.npmjs.org/@types/semver/-/semver-7.5.0.tgz",
+      "integrity": "sha512-G8hZ6XJiHnuhQKR7ZmysCeJWE08o8T0AXtk5darsCaTVsYZhhgUrq53jizaR2FvsoeCwJhlmwTjkXBY5Pn/ZHw==",
+      "dev": true
+    },
     "node_modules/@types/serve-static": {
       "version": "1.15.0",
       "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.15.0.tgz",
@@ -3212,6 +3264,305 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@typescript-eslint/eslint-plugin": {
+      "version": "5.59.6",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-5.59.6.tgz",
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+      "dev": true,
+      "dependencies": {
+        "@eslint-community/regexpp": "^4.4.0",
+        "@typescript-eslint/scope-manager": "5.59.6",
+        "@typescript-eslint/type-utils": "5.59.6",
+        "@typescript-eslint/utils": "5.59.6",
+        "debug": "^4.3.4",
+        "grapheme-splitter": "^1.0.4",
+        "ignore": "^5.2.0",
+        "natural-compare-lite": "^1.4.0",
+        "semver": "^7.3.7",
+        "tsutils": "^3.21.0"
+      },
+      "engines": {
+        "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/typescript-eslint"
+      },
+      "peerDependencies": {
+        "@typescript-eslint/parser": "^5.0.0",
+        "eslint": "^6.0.0 || ^7.0.0 || ^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@typescript-eslint/eslint-plugin/node_modules/lru-cache": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
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+        "yallist": "^4.0.0"
+      },
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       "dev": true
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+    "node_modules/array-union": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/array-union/-/array-union-2.1.0.tgz",
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+      "dev": true,
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     "node_modules/asar": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/asar/-/asar-3.2.0.tgz",
@@ -5217,6 +5577,18 @@
         "minimatch": "^3.0.4"
       }
     },
+    "node_modules/dir-glob": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/dir-glob/-/dir-glob-3.0.1.tgz",
+      "integrity": "sha512-WkrWp9GR4KXfKGYzOLmTuGVi1UWFfws377n9cc55/tb6DuqyF6pcQ5AbiHEshaDpY9v6oaSr2XCDidGmMwdzIA==",
+      "dev": true,
+      "dependencies": {
+        "path-type": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/doctrine": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
@@ -6459,6 +6831,19 @@
       "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
       "dev": true
     },
+    "node_modules/eslint-scope": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-5.1.1.tgz",
+      "integrity": "sha512-2NxwbF/hZ0KpepYN0cNbo+FN6XoK7GaHlQhgx/hIZl6Va0bF45RQOOwhLIy8lQDbuCiadSLCBnH2CFYquit5bw==",
+      "dev": true,
+      "dependencies": {
+        "esrecurse": "^4.3.0",
+        "estraverse": "^4.1.1"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
     "node_modules/eslint-utils": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-3.0.0.tgz",
@@ -6721,6 +7106,15 @@
         "node": ">=4.0"
       }
     },
+    "node_modules/estraverse": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-4.3.0.tgz",
+      "integrity": "sha512-39nnKffWz8xN1BU/2c79n9nB9HDzo0niYUqx6xyqUnyoAnQyyWpOTdZEeiCch8BBu515t4wp9ZmgVfVhn9EBpw==",
+      "dev": true,
+      "engines": {
+        "node": ">=4.0"
+      }
+    },
     "node_modules/estree-walker": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-2.0.2.tgz",
@@ -7563,6 +7957,26 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/globby": {
+      "version": "11.1.0",
+      "resolved": "https://registry.npmjs.org/globby/-/globby-11.1.0.tgz",
+      "integrity": "sha512-jhIXaOzy1sb8IyocaruWSn1TjmnBVs8Ayhcy83rmxNJ8q2uWKCAj3CnJY+KpGSXCueAPc0i05kVvVKtP1t9S3g==",
+      "dev": true,
+      "dependencies": {
+        "array-union": "^2.1.0",
+        "dir-glob": "^3.0.1",
+        "fast-glob": "^3.2.9",
+        "ignore": "^5.2.0",
+        "merge2": "^1.4.1",
+        "slash": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/globrex": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/globrex/-/globrex-0.1.2.tgz",
@@ -9413,6 +9827,12 @@
       "integrity": "sha512-OWND8ei3VtNC9h7V60qff3SVobHr996CTwgxubgyQYEpg290h9J0buyECNNJexkFm5sOajh5G116RYA1c8ZMSw==",
       "dev": true
     },
+    "node_modules/natural-compare-lite": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/natural-compare-lite/-/natural-compare-lite-1.4.0.tgz",
+      "integrity": "sha512-Tj+HTDSJJKaZnfiuw+iaF9skdPpTo2GtEly5JHnWV/hfv2Qj/9RKsGISQtLh2ox3l5EAGw487hnBee0sIJ6v2g==",
+      "dev": true
+    },
     "node_modules/negotiator": {
       "version": "0.6.3",
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz",
@@ -9982,6 +10402,15 @@
       "integrity": "sha512-5DFkuoqlv1uYQKxy8omFBeJPQcdoE07Kv2sferDCrAq1ohOU+MSDswDIbnx3YAM60qIOnYa53wBhXW0EbMonrQ==",
       "dev": true
     },
+    "node_modules/path-type": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/path-type/-/path-type-4.0.0.tgz",
+      "integrity": "sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/pathe": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/pathe/-/pathe-1.1.0.tgz",
@@ -10615,15 +11044,6 @@
         "tslib": "^1.9.3"
       }
     },
-    "node_modules/recrawl-sync/node_modules/slash": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
-      "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
-      "dev": true,
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/recrawl-sync/node_modules/tslib": {
       "version": "1.14.1",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
@@ -11408,6 +11828,15 @@
       "integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
       "dev": true
     },
+    "node_modules/slash": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+      "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/slice-ansi": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-4.0.0.tgz",
@@ -12162,6 +12591,27 @@
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.5.0.tgz",
       "integrity": "sha512-336iVw3rtn2BUK7ORdIAHTyxHGRIHVReokCR3XjbckJMK7ms8FysBfhLR8IXnAgy7T0PTPNBWKiH514FOW/WSg=="
     },
+    "node_modules/tsutils": {
+      "version": "3.21.0",
+      "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-3.21.0.tgz",
+      "integrity": "sha512-mHKK3iUXL+3UF6xL5k0PEhKRUBKPBCv/+RkEOpjRWxxx27KKRBmmA60A9pgOUvMi8GKhRMPEmjBRPzs2W7O1OA==",
+      "dev": true,
+      "dependencies": {
+        "tslib": "^1.8.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      },
+      "peerDependencies": {
+        "typescript": ">=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta"
+      }
+    },
+    "node_modules/tsutils/node_modules/tslib": {
+      "version": "1.14.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
+      "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==",
+      "dev": true
+    },
     "node_modules/tunnel": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/tunnel/-/tunnel-0.0.6.tgz",
@@ -12233,17 +12683,16 @@
       }
     },
     "node_modules/typescript": {
-      "version": "4.9.4",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.4.tgz",
-      "integrity": "sha512-Uz+dTXYzxXXbsFpM86Wh3dKCxrQqUcVMxwU54orwlJjOpO3ao8L7j5lH+dWfTwgCwIuM9GQ2kvVotzYJMXTBZg==",
-      "optional": true,
-      "peer": true,
+      "version": "5.0.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.0.4.tgz",
+      "integrity": "sha512-cW9T5W9xY37cc+jfEnaUvX91foxtHkza3Nw3wkoF4sSlKn0MONdkdEndig/qPBWXNkmplh3NzayQzCiHM4/hqw==",
+      "devOptional": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
       },
       "engines": {
-        "node": ">=4.2.0"
+        "node": ">=12.20"
       }
     },
     "node_modules/ufo": {
diff --git a/package.json b/package.json
index e4e950ba..3673a518 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,10 @@
     "@quasar/app-vite": "^1.0.0",
     "@quasar/quasar-app-extension-testing": "^2.1.0",
     "@quasar/quasar-app-extension-testing-unit-vitest": "^0.2.1",
+    "@types/node": "^20.2.1",
+    "@typescript-eslint/eslint-plugin": "^5.59.6",
+    "@typescript-eslint/parser": "^5.59.6",
+    "@vue/test-utils": "^2.0.0",
     "autoprefixer": "^10.4.14",
     "electron": "^23.1.1",
     "electron-packager": "^15.5.2",
@@ -45,15 +49,15 @@
     "eslint-config-prettier": "^8.1.0",
     "eslint-plugin-vue": "^9.0.0",
     "prettier": "^2.5.1",
+    "typescript": "^5.0.4",
+    "vitest": "^0.29.1",
     "workbox-build": "^6.5.4",
     "workbox-cacheable-response": "^6.5.4",
     "workbox-core": "^6.5.4",
     "workbox-expiration": "^6.5.4",
     "workbox-precaching": "^6.5.4",
     "workbox-routing": "^6.5.4",
-    "workbox-strategies": "^6.5.4",
-    "@vue/test-utils": "^2.0.0",
-    "vitest": "^0.29.1"
+    "workbox-strategies": "^6.5.4"
   },
   "engines": {
     "node": ">=16.11.0",
diff --git a/src/js/notify.js b/src/js/notify.ts
similarity index 57%
rename from src/js/notify.js
rename to src/js/notify.ts
index e53d03fd..08e1f662 100644
--- a/src/js/notify.js
+++ b/src/js/notify.ts
@@ -1,25 +1,35 @@
-import { Notify } from "quasar";
+import { Notify, QNotifyCreateOptions } from "quasar";
 import axios, { AxiosError } from "axios";
 
-function notifyApiError(error) {
-  let types = {
-    400: "warning",
-    401: "warning",
-    500: "negative",
-  };
+type ApiError =
+  | AxiosError
+  | {
+      response: {
+        status: number;
+        statusText: string;
+        data: { message?: string; detail?: string };
+      };
+    };
+
+type StatusMap = { [x: number]: "warning" | "negative" };
+const errorTypes = {
+  400: "warning",
+  401: "warning",
+  500: "negative",
+} as StatusMap;
+
+function notifyApiError(error: ApiError) {
   if (axios.isAxiosError(error)) {
     notifyAxiosError(error);
     return;
   }
   Notify.create({
     timeout: 5000,
-    type: types[error.response.status] || "warning",
-    message: error.response.data.message || error.response.data.detail || null,
-    caption:
-      [error.response.status, " ", error.response.statusText]
-        .join("")
-        .toUpperCase() || null,
-    icon: null,
+    type: errorTypes[error.response.status] ?? "warning",
+    message: error.response.data.message ?? error.response.data.detail,
+    caption: [error.response.status, " ", error.response.statusText]
+      .join("")
+      .toUpperCase(),
   });
 }
 
@@ -27,22 +37,24 @@ function notifyApiError(error) {
  * Cashu-TS will return axios errors when certain calls fail, so we should handle those
  * @param {AxiosError} error
  */
-function notifyAxiosError(error) {
+function notifyAxiosError(error: AxiosError) {
   Notify.create({
     timeout: 5000,
-    type: types[error.status] || "warning",
+    type: errorTypes[error.status!] || "warning",
     message: error.message,
     caption: error.code,
-    icon: null,
   });
 }
 
-async function notifySuccess(message, position = "top") {
+async function notifySuccess(
+  message: string,
+  position = "top" as QNotifyCreateOptions["position"]
+) {
   Notify.create({
     timeout: 5000,
     type: "positive",
     message: message,
-    position: position,
+    position,
     progress: true,
     actions: [
       {
@@ -54,11 +66,11 @@ async function notifySuccess(message, position = "top") {
   });
 }
 
-async function notifyError(message, caption = null) {
+async function notifyError(message: string, caption?: string) {
   Notify.create({
     color: "red",
     message: message,
-    caption: caption,
+    caption,
     position: "top",
     progress: true,
     actions: [
@@ -71,7 +83,11 @@ async function notifyError(message, caption = null) {
   });
 }
 
-async function notifyWarning(message, caption = null, timeout = 5000) {
+async function notifyWarning(
+  message: string,
+  caption?: string,
+  timeout = 5000
+) {
   Notify.create({
     timeout: timeout,
     type: "warning",
@@ -89,20 +105,13 @@ async function notifyWarning(message, caption = null, timeout = 5000) {
   });
 }
 
-async function notify(
-  message,
-  type = "null",
-  position = "top",
-  caption = null,
-  color = null
-) {
+async function notify(message: string) {
   // failure
   Notify.create({
     timeout: 5000,
     type: "null",
     color: "grey",
     message: message,
-    caption: null,
     position: "top",
     actions: [
       {
diff --git a/src/js/token.js b/src/js/token.ts
similarity index 51%
rename from src/js/token.js
rename to src/js/token.ts
index 674d2a60..b7e87dbc 100644
--- a/src/js/token.js
+++ b/src/js/token.ts
@@ -1,28 +1,19 @@
-import { getDecodedToken } from "@cashu/cashu-ts";
-/**
- * Functions related to cashu tokens
- * @typedef {{C: string, amount: number, id: number, secret: number}} Proof
- * @typedef {{proofs: Proof[], mint: string}} Token
- */
+import { type Token, getDecodedToken } from "@cashu/cashu-ts";
 
 export default { decode, getProofs, getMint };
 
 /**
  * Decodes an encoded cashu token
- * @param {string} encoded_token
- * @returns {{token: Token[]}}
  */
-function decode(encoded_token) {
-  if (!encoded_token || encoded_token === "") return "";
+function decode(encoded_token: string) {
+  if (!encoded_token || encoded_token === "") return;
   return getDecodedToken(encoded_token);
 }
 
 /**
  * Returns a list of proofs from a decoded token
- * @param {{token: Token[]}} decoded_token
- * @returns {Proof[]}
  */
-function getProofs(decoded_token) {
+function getProofs(decoded_token: Token) {
   if (
     !(decoded_token.token.length > 0) ||
     !(decoded_token.token[0].proofs.length > 0)
@@ -32,11 +23,7 @@ function getProofs(decoded_token) {
   return decoded_token.token.map((t) => t.proofs).flat();
 }
 
-/**
- * @param {{token: Token[]}} decoded_token
- * @returns {string}
- */
-function getMint(decoded_token) {
+function getMint(decoded_token: Token) {
   /*
       Returns first mint of a token (very rough way).
       */
diff --git a/src/stores/mints.js b/src/stores/mints.ts
similarity index 84%
rename from src/stores/mints.js
rename to src/stores/mints.ts
index 0e883e8f..4aa3a34b 100644
--- a/src/stores/mints.js
+++ b/src/stores/mints.ts
@@ -2,18 +2,25 @@ import { defineStore } from "pinia";
 import { useLocalStorage } from "@vueuse/core";
 import { useWorkersStore } from "./workers";
 import { notifyApiError, notifyError, notifySuccess } from "src/js/notify";
-import { CashuMint } from "@cashu/cashu-ts";
+import { CashuMint, MintKeys, Proof } from "@cashu/cashu-ts";
+
+type Mint = {
+  url: string;
+  balance: number;
+  keys?: MintKeys;
+  keysets?: string[];
+};
 
 export const useMintsStore = defineStore("mints", {
   state: () => {
     return {
-      activeMintUrl: useLocalStorage("cashu.activeMintUrl", ""),
-      activeProofs: useLocalStorage("cashu.activeProofs", []),
-      keys: useLocalStorage("cashu.keys", {}),
-      keysets: useLocalStorage("cashu.keysets", []),
+      activeMintUrl: useLocalStorage<string>("cashu.activeMintUrl", ""),
+      activeProofs: useLocalStorage("cashu.activeProofs", [] as Proof[]),
+      keys: useLocalStorage("cashu.keys", {} as MintKeys),
+      keysets: useLocalStorage("cashu.keysets", [] as string[]),
       mintToAdd: "https://8333.space:3338",
-      mints: useLocalStorage("cashu.mints", []),
-      proofs: useLocalStorage("cashu.proofs", []),
+      mints: useLocalStorage("cashu.mints", [] as Mint[]),
+      proofs: useLocalStorage("cashu.proofs", [] as Proof[]),
       showAddMintDialog: false,
     };
   },
@@ -23,13 +30,13 @@ export const useMintsStore = defineStore("mints", {
     },
   },
   actions: {
-    setShowAddMintDialog(show) {
+    setShowAddMintDialog(show: boolean) {
       this.showAddMintDialog = show;
     },
-    setMintToAdd(mint) {
+    setMintToAdd(mint: string) {
       this.mintToAdd = mint;
     },
-    setProofs(proofs) {
+    setProofs(proofs: Proof[]) {
       this.proofs = proofs;
       if (this.keysets) {
         this.activeProofs = this.proofs.filter((p) =>
@@ -37,14 +44,14 @@ export const useMintsStore = defineStore("mints", {
         );
       }
     },
-    setActiveProofs(proofs) {
+    setActiveProofs(proofs: Proof[]) {
       this.activeProofs = proofs;
     },
-    addMint: async function (url, verbose = false) {
+    addMint: async function (url: string, verbose = false) {
       try {
         // we have no mints at all
         if (this.mints.length === 0) {
-          this.mints = [{ url: url, balance: 0 }];
+          this.mints = [{ url, balance: 0 }];
         } else if (this.mints.filter((m) => m.url === url).length === 0) {
           // we don't have this mint yet
           this.mints.push({ url: url, balance: 0 });
@@ -59,7 +66,7 @@ export const useMintsStore = defineStore("mints", {
         this.showAddMintDialog = false;
       }
     },
-    activateMint: async function (url, verbose = false, force = false) {
+    activateMint: async function (url: string, verbose = false, force = false) {
       const workers = useWorkersStore();
       if (url === this.activeMintUrl && !force) {
         // return here because this function is called repeatedly by the
@@ -100,7 +107,7 @@ export const useMintsStore = defineStore("mints", {
           "balance",
           this.getBalance()
         );
-      } catch (error) {
+      } catch (error: any) {
         // restore previous values because the activation errored
         this.activeMintUrl = previousUrl;
         this.keys = previousKeys;
@@ -121,7 +128,6 @@ export const useMintsStore = defineStore("mints", {
         console.log("### GET", `${this.activeMintUrl}/keys`);
         const data = await this.activeMint.getKeys();
         const keys = data;
-        this.assertMintError(keys);
         this.keys = keys;
 
         const keysets = await this.fetchMintKeysets();
@@ -133,7 +139,7 @@ export const useMintsStore = defineStore("mints", {
         }
 
         return keys;
-      } catch (error) {
+      } catch (error: any) {
         console.error(error);
         try {
           notifyApiError(error);
@@ -145,11 +151,10 @@ export const useMintsStore = defineStore("mints", {
       // attention: this function overwrites this.keysets
       try {
         const data = await this.activeMint.getKeySets();
-        this.assertMintError(data);
         this.keysets = data.keysets;
 
         return data.keysets;
-      } catch (error) {
+      } catch (error: any) {
         console.error(error);
         try {
           notifyApiError(error);
@@ -157,7 +162,7 @@ export const useMintsStore = defineStore("mints", {
         throw error;
       }
     },
-    removeMint: async function (url) {
+    removeMint: async function (url: string) {
       this.mints = this.mints.filter((m) => m.url !== url);
       if (url === this.activeMintUrl) {
         this.activeMintUrl = "";
@@ -168,7 +173,7 @@ export const useMintsStore = defineStore("mints", {
       }
       notifySuccess("Mint removed.");
     },
-    restoreFromBackup: function (backup) {
+    restoreFromBackup: function (backup: any) {
       if (!backup || !backup["cashu.welcomeDialogSeen"]) {
         notifyError("Unrecognized Backup Format!");
       } else {
@@ -197,7 +202,7 @@ export const useMintsStore = defineStore("mints", {
         notifySuccess("Backup successfully restored!");
       }
     },
-    assertMintError: function (response, verbose = true) {
+    assertMintError: function (response: { error: any }, verbose = true) {
       if (response.error != null) {
         if (verbose) {
           notifyError(response.error, "Mint error");
diff --git a/src/stores/tokens.js b/src/stores/tokens.ts
similarity index 56%
rename from src/stores/tokens.js
rename to src/stores/tokens.ts
index 488dedf9..8cea9127 100644
--- a/src/stores/tokens.js
+++ b/src/stores/tokens.ts
@@ -1,16 +1,35 @@
 import { useLocalStorage } from "@vueuse/core";
 import { date } from "quasar";
 import { defineStore } from "pinia";
+import { Proof, Token } from "@cashu/cashu-ts";
+
+/**
+ * The tokens store handles everything related to tokens and proofs
+ */
+
+type HistoryToken = {
+  status: "paid" | "pending";
+  amount: number;
+  date: string;
+  token: string;
+};
 
 export const useTokensStore = defineStore("tokens", {
   state: () => ({
-    historyTokens: useLocalStorage("cashu.historyTokens", []),
+    historyTokens: useLocalStorage("cashu.historyTokens", [] as HistoryToken[]),
+    proofs: useLocalStorage("cashu.proofs", [] as Proof[]),
   }),
   actions: {
     /**
      * @param {{amount: number, serializedProofs: string}}
      */
-    addPaidToken({ amount, serializedProofs }) {
+    addPaidToken({
+      amount,
+      serializedProofs,
+    }: {
+      amount: number;
+      serializedProofs: string;
+    }) {
       this.historyTokens.push({
         status: "paid",
         amount,
@@ -18,10 +37,13 @@ export const useTokensStore = defineStore("tokens", {
         token: serializedProofs,
       });
     },
-    /**
-     * @param {{amount: number, serializedProofs: string}} param0
-     */
-    addPendingToken({ amount, serializedProofs }) {
+    addPendingToken({
+      amount,
+      serializedProofs,
+    }: {
+      amount: number;
+      serializedProofs: string;
+    }) {
       this.historyTokens.push({
         status: "pending",
         amount,
@@ -29,10 +51,7 @@ export const useTokensStore = defineStore("tokens", {
         token: serializedProofs,
       });
     },
-    /**
-     * @param {string} token
-     */
-    setTokenPaid(token) {
+    setTokenPaid(token: string) {
       const index = this.historyTokens.findIndex((t) => t.token === token);
       if (index >= 0) {
         this.historyTokens[index].status = "paid";
diff --git a/src/stores/wallet.js b/src/stores/wallet.ts
similarity index 63%
rename from src/stores/wallet.js
rename to src/stores/wallet.ts
index c04fd01f..fcc11fd5 100644
--- a/src/stores/wallet.js
+++ b/src/stores/wallet.ts
@@ -3,17 +3,34 @@ import { currentDateStr } from "src/js/utils";
 import { notifyApiError } from "src/js/notify";
 import { useMintsStore } from "./mints";
 import { useLocalStorage } from "@vueuse/core";
+import { CashuMint, CashuWallet } from "@cashu/cashu-ts";
+
+type Invoice = {
+  amount: number;
+  bolt11: string;
+  hash: string;
+  memo: string;
+};
+
+type InvoiceHistory = Invoice & {
+  date: string;
+  status: "pending" | "paid";
+  mint?: string;
+};
 
 export const useWalletStore = defineStore("wallet", {
   state: () => {
     return {
-      invoiceHistory: useLocalStorage("cashu.invoiceHistory", []),
+      invoiceHistory: useLocalStorage(
+        "cashu.invoiceHistory",
+        [] as InvoiceHistory[]
+      ),
       invoiceData: {
         amount: 0,
         memo: "",
         bolt11: "",
         hash: "",
-      },
+      } as Invoice,
       payInvoiceData: {
         blocking: false,
         bolt11: "",
@@ -32,7 +49,8 @@ export const useWalletStore = defineStore("wallet", {
   getters: {
     wallet() {
       const mints = useMintsStore();
-      const wallet = new CashuWallet(mints.keys, mints.activeMint);
+      const mint = new CashuMint(mints.activeMintUrl);
+      const wallet = new CashuWallet(mint);
       return wallet;
     },
   },
@@ -41,12 +59,10 @@ export const useWalletStore = defineStore("wallet", {
      * Ask the mint to generate an invoice for the given amount
      * Upon paying the request, the mint will credit the wallet with
      * cashu tokens
-     * @param {number | null} amount
-     * @returns
      */
-    requestMint: async function (amount = null) {
+    requestMint: async function (amount?: number) {
       const mints = useMintsStore();
-      if (amount != null) {
+      if (amount) {
         this.invoiceData.amount = amount;
       }
       try {
@@ -55,26 +71,21 @@ export const useWalletStore = defineStore("wallet", {
         );
         this.invoiceData.bolt11 = data.pr;
         this.invoiceData.hash = data.hash;
-        this.invoiceHistory.push(
-          // extend dictionary
-          Object.assign({}, this.invoiceData, {
-            date: currentDateStr(),
-            status: "pending",
-            mint: this.activeMintUrl,
-          })
-        );
+        this.invoiceHistory.push({
+          ...this.invoiceData,
+          date: currentDateStr(),
+          status: "pending",
+          mint: mints.activeMintUrl,
+        });
         return data;
-      } catch (error) {
+      } catch (error: any) {
         console.error(error);
         notifyApiError(error);
       }
     },
-    /**
-     * Sets an invoice status to paid
-     * @param {string} payment_hash
-     */
-    setInvoicePaid(payment_hash) {
+    setInvoicePaid(payment_hash: string) {
       const invoice = this.invoiceHistory.find((i) => i.hash === payment_hash);
+      if (!invoice) return;
       invoice.status = "paid";
     },
   },
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 00000000..edb75bbf
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,17 @@
+{
+  "extends": "@quasar/app-vite/tsconfig-preset",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "paths": {
+      "src/*": ["src/*"],
+      "app/*": ["*"],
+      "components/*": ["src/components/*"],
+      "layouts/*": ["src/layouts/*"],
+      "pages/*": ["src/pages/*"],
+      "assets/*": ["src/assets/*"],
+      "boot/*": ["src/boot/*"],
+      "stores/*": ["src/stores/*"],
+      "vue$": ["node_modules/vue/dist/vue.runtime.esm-bundler.js"]
+    }
+  }
+}