diff --git a/federation/.eslintignore b/federation/.eslintignore
deleted file mode 100644
index f6b255e92..000000000
--- a/federation/.eslintignore
+++ /dev/null
@@ -1,3 +0,0 @@
-node_modules
-**/*.min.js
-build
\ No newline at end of file
diff --git a/federation/.eslintrc.js b/federation/.eslintrc.js
deleted file mode 100644
index 042a417f7..000000000
--- a/federation/.eslintrc.js
+++ /dev/null
@@ -1,206 +0,0 @@
-// eslint-disable-next-line import/no-commonjs, import/unambiguous
-module.exports = {
-  root: true,
-  env: {
-    node: true,
-  },
-  parser: '@typescript-eslint/parser',
-  plugins: ['prettier', '@typescript-eslint', 'import', 'n', 'promise'],
-  extends: [
-    'standard',
-    'eslint:recommended',
-    'plugin:prettier/recommended',
-    // 'plugin:import/recommended',
-    // 'plugin:import/typescript',
-    // 'plugin:security/recommended',
-    // 'plugin:@eslint-community/eslint-comments/recommended',
-  ],
-  settings: {
-    'import/parsers': {
-      '@typescript-eslint/parser': ['.ts', '.tsx'],
-    },
-    'import/resolver': {
-      typescript: {
-        project: ['./tsconfig.json'],
-      },
-      node: true,
-    },
-  },
-  rules: {
-    'no-console': 'error',
-    camelcase: 'error',
-    'no-debugger': 'error',
-    'prettier/prettier': [
-      'error',
-      {
-        htmlWhitespaceSensitivity: 'ignore',
-      },
-    ],
-    // import
-    // 'import/export': 'error',
-    // 'import/no-deprecated': 'error',
-    // 'import/no-empty-named-blocks': 'error',
-    // 'import/no-extraneous-dependencies': 'error',
-    // 'import/no-mutable-exports': 'error',
-    // 'import/no-unused-modules': 'error',
-    // 'import/no-named-as-default': 'error',
-    // 'import/no-named-as-default-member': 'error',
-    // 'import/no-amd': 'error',
-    // 'import/no-commonjs': 'error',
-    // 'import/no-import-module-exports': 'error',
-    // 'import/no-nodejs-modules': 'off',
-    // 'import/unambiguous': 'error',
-    // 'import/default': 'error',
-    // 'import/named': 'error',
-    // 'import/namespace': 'error',
-    // 'import/no-absolute-path': 'error',
-    // 'import/no-cycle': 'error',
-    // 'import/no-dynamic-require': 'error',
-    // 'import/no-internal-modules': 'off',
-    // 'import/no-relative-packages': 'error',
-    // 'import/no-relative-parent-imports': ['error', { ignore: ['@/*'] }],
-    // 'import/no-self-import': 'error',
-    // 'import/no-unresolved': 'error',
-    // 'import/no-useless-path-segments': 'error',
-    // 'import/no-webpack-loader-syntax': 'error',
-    // 'import/consistent-type-specifier-style': 'error',
-    // 'import/exports-last': 'off',
-    // 'import/extensions': 'error',
-    // 'import/first': 'error',
-    // 'import/group-exports': 'off',
-    // 'import/newline-after-import': 'error',
-    // 'import/no-anonymous-default-export': 'error',
-    // 'import/no-default-export': 'error',
-    // 'import/no-duplicates': 'error',
-    // 'import/no-named-default': 'error',
-    // 'import/no-namespace': 'error',
-    // 'import/no-unassigned-import': 'error',
-    // 'import/order': [
-    //   'error',
-    //   {
-    //     groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index', 'object', 'type'],
-    //     'newlines-between': 'always',
-    //     pathGroups: [
-    //       {
-    //         pattern: '@?*/**',
-    //         group: 'external',
-    //         position: 'after',
-    //       },
-    //       {
-    //         pattern: '@/**',
-    //         group: 'external',
-    //         position: 'after',
-    //       },
-    //     ],
-    //     alphabetize: {
-    //       order: 'asc' /* sort in ascending order. Options: ['ignore', 'asc', 'desc'] */,
-    //       caseInsensitive: true /* ignore case. Options: [true, false] */,
-    //     },
-    //     distinctGroup: true,
-    //   },
-    // ],
-    // 'import/prefer-default-export': 'off',
-    // n
-    // 'n/handle-callback-err': 'error',
-    // 'n/no-callback-literal': 'error',
-    // 'n/no-exports-assign': 'error',
-    // 'n/no-extraneous-import': 'error',
-    // 'n/no-extraneous-require': 'error',
-    // 'n/no-hide-core-modules': 'error',
-    // 'n/no-missing-import': 'off', // not compatible with typescript
-    // 'n/no-missing-require': 'error',
-    // 'n/no-new-require': 'error',
-    // 'n/no-path-concat': 'error',
-    // 'n/no-process-exit': 'error',
-    // 'n/no-unpublished-bin': 'error',
-    // 'n/no-unpublished-import': 'off', // TODO need to exclude seeds
-    // 'n/no-unpublished-require': 'error',
-    // 'n/no-unsupported-features': ['error', { ignores: ['modules'] }],
-    // 'n/no-unsupported-features/es-builtins': 'error',
-    // 'n/no-unsupported-features/es-syntax': 'error',
-    // 'n/no-unsupported-features/node-builtins': 'error',
-    // 'n/process-exit-as-throw': 'error',
-    // 'n/shebang': 'error',
-    // 'n/callback-return': 'error',
-    // 'n/exports-style': 'error',
-    // 'n/file-extension-in-import': 'off',
-    // 'n/global-require': 'error',
-    // 'n/no-mixed-requires': 'error',
-    // 'n/no-process-env': 'error',
-    // 'n/no-restricted-import': 'error',
-    // 'n/no-restricted-require': 'error',
-    // 'n/no-sync': 'error',
-    // 'n/prefer-global/buffer': 'error',
-    // 'n/prefer-global/console': 'error',
-    // 'n/prefer-global/process': 'error',
-    // 'n/prefer-global/text-decoder': 'error',
-    // 'n/prefer-global/text-encoder': 'error',
-    // 'n/prefer-global/url': 'error',
-    // 'n/prefer-global/url-search-params': 'error',
-    // 'n/prefer-promises/dns': 'error',
-    // 'n/prefer-promises/fs': 'error',
-    // promise
-    // 'promise/catch-or-return': 'error',
-    // 'promise/no-return-wrap': 'error',
-    // 'promise/param-names': 'error',
-    // 'promise/always-return': 'error',
-    // 'promise/no-native': 'off',
-    // 'promise/no-nesting': 'warn',
-    // 'promise/no-promise-in-callback': 'warn',
-    // 'promise/no-callback-in-promise': 'warn',
-    // 'promise/avoid-new': 'warn',
-    // 'promise/no-new-statics': 'error',
-    // 'promise/no-return-in-finally': 'warn',
-    // 'promise/valid-params': 'warn',
-    // 'promise/prefer-await-to-callbacks': 'error',
-    // 'promise/no-multiple-resolved': 'error',
-    // eslint comments
-    // '@eslint-community/eslint-comments/disable-enable-pair': ['error', { allowWholeFile: true }],
-    // '@eslint-community/eslint-comments/no-restricted-disable': 'error',
-    // '@eslint-community/eslint-comments/no-use': 'off',
-    // '@eslint-community/eslint-comments/require-description': 'off',
-  },
-  overrides: [
-    // only for ts files
-    {
-      files: ['*.ts', '*.tsx'],
-      extends: [
-        'plugin:@typescript-eslint/recommended',
-        // 'plugin:@typescript-eslint/recommended-requiring-type-checking',
-        // 'plugin:@typescript-eslint/strict',
-        // 'plugin:type-graphql/recommended',
-      ],
-      rules: {
-        // allow explicitly defined dangling promises
-        // '@typescript-eslint/no-floating-promises': ['error', { ignoreVoid: true }],
-        'no-void': ['error', { allowAsStatement: true }],
-        // ignore prefer-regexp-exec rule to allow string.match(regex)
-        '@typescript-eslint/prefer-regexp-exec': 'off',
-        // this should not run on ts files: https://github.com/import-js/eslint-plugin-import/issues/2215#issuecomment-911245486
-        'import/unambiguous': 'off',
-        // this is not compatible with typeorm, due to joined tables can be null, but are not defined as nullable
-        '@typescript-eslint/no-unnecessary-condition': 'off',
-      },
-      parserOptions: {
-        tsconfigRootDir: __dirname,
-        project: ['./tsconfig.json'],
-        // this is to properly reference the referenced project database without requirement of compiling it
-        // eslint-disable-next-line camelcase
-        EXPERIMENTAL_useSourceOfProjectReferenceRedirect: true,
-      },
-    },
-    {
-      files: ['*.test.ts'],
-      plugins: ['jest'],
-      rules: {
-        'jest/no-disabled-tests': 'error',
-        'jest/no-focused-tests': 'error',
-        'jest/no-identical-title': 'error',
-        'jest/prefer-to-have-length': 'error',
-        'jest/valid-expect': 'error',
-        '@typescript-eslint/unbound-method': 'off',
-        // 'jest/unbound-method': 'error',
-      },
-    },
-  ],
-}
diff --git a/federation/.prettierrc.js b/federation/.prettierrc.js
deleted file mode 100644
index bc1d767d7..000000000
--- a/federation/.prettierrc.js
+++ /dev/null
@@ -1,9 +0,0 @@
-module.exports = {
-  semi: false,
-  printWidth: 100,
-  singleQuote: true,
-  trailingComma: "all",
-  tabWidth: 2,
-  bracketSpacing: true,
-  endOfLine: "auto",
-};
diff --git a/federation/package.json b/federation/package.json
index d54562abd..fa129b74e 100644
--- a/federation/package.json
+++ b/federation/package.json
@@ -37,6 +37,7 @@
     "uuid": "8.3.2"
   },
   "devDependencies": {
+    "@biomejs/biome": "1.9.4",
     "@types/express": "4.17.12",
     "@types/jest": "27.0.2",
     "@types/joi": "^17.2.3",
@@ -44,20 +45,7 @@
     "@types/node": "^16.10.3",
     "@types/sodium-native": "^2.3.5",
     "@types/uuid": "^8.3.4",
-    "@typescript-eslint/eslint-plugin": "^5.57.1",
-    "@typescript-eslint/parser": "^5.57.1",
     "apollo-server-testing": "2.25.2",
-    "eslint": "^8.37.0",
-    "eslint-config-prettier": "^8.8.0",
-    "eslint-config-standard": "^17.0.0",
-    "eslint-import-resolver-typescript": "^3.5.4",
-    "eslint-plugin-import": "^2.27.5",
-    "eslint-plugin-jest": "^27.2.1",
-    "eslint-plugin-n": "^15.7.0",
-    "eslint-plugin-prettier": "^4.2.1",
-    "eslint-plugin-promise": "^6.1.1",
-    "eslint-plugin-security": "^1.7.1",
-    "eslint-plugin-type-graphql": "^1.0.0",
     "gradido-config": "../config",
     "graphql-tag": "^2.12.6",
     "jest": "^27.2.4",
diff --git a/federation/src/client/1_0/AuthenticationClient.ts b/federation/src/client/1_0/AuthenticationClient.ts
index 3a94746b1..29a686ca3 100644
--- a/federation/src/client/1_0/AuthenticationClient.ts
+++ b/federation/src/client/1_0/AuthenticationClient.ts
@@ -1,11 +1,11 @@
+import { federationLogger as logger } from '@/server/logger'
 import { FederatedCommunity as DbFederatedCommunity } from '@entity/FederatedCommunity'
 import { GraphQLClient } from 'graphql-request'
-import { federationLogger as logger } from '@/server/logger'
 
-import { OpenConnectionCallbackArgs } from '@/graphql/api/1_0/model/OpenConnectionCallbackArgs'
-import { openConnectionCallback } from './query/openConnectionCallback'
 import { AuthenticationArgs } from '@/graphql/api/1_0/model/AuthenticationArgs'
+import { OpenConnectionCallbackArgs } from '@/graphql/api/1_0/model/OpenConnectionCallbackArgs'
 import { authenticate } from './query/authenticate'
+import { openConnectionCallback } from './query/openConnectionCallback'
 
 export class AuthenticationClient {
   dbCom: DbFederatedCommunity
@@ -29,9 +29,8 @@ export class AuthenticationClient {
   async openConnectionCallback(args: OpenConnectionCallbackArgs): Promise<boolean> {
     logger.debug('Authentication: openConnectionCallback with endpoint', this.endpoint, args)
     try {
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-explicit-any
       const { data } = await this.client.rawRequest<any>(openConnectionCallback, { args })
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+
       if (data && data.openConnectionCallback) {
         logger.warn(
           'Authentication: openConnectionCallback without response data from endpoint',
@@ -53,10 +52,9 @@ export class AuthenticationClient {
   async authenticate(args: AuthenticationArgs): Promise<string | null> {
     logger.debug('Authentication: authenticate with endpoint=', this.endpoint)
     try {
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-explicit-any
       const { data } = await this.client.rawRequest<any>(authenticate, { args })
       logger.debug('Authentication: after authenticate: data:', data)
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+
       const authUuid: string = data?.authenticate
       if (authUuid) {
         logger.debug('Authentication: received authenticated uuid', authUuid)
diff --git a/federation/src/client/1_1/AuthenticationClient.ts b/federation/src/client/1_1/AuthenticationClient.ts
index eb5721b16..b089574dd 100644
--- a/federation/src/client/1_1/AuthenticationClient.ts
+++ b/federation/src/client/1_1/AuthenticationClient.ts
@@ -1,5 +1,3 @@
-// eslint-disable-next-line camelcase
 import { AuthenticationClient as V1_0_AuthenticationClient } from '../1_0/AuthenticationClient'
 
-// eslint-disable-next-line camelcase
 export class AuthenticationClient extends V1_0_AuthenticationClient {}
diff --git a/federation/src/client/AuthenticationClientFactory.ts b/federation/src/client/AuthenticationClientFactory.ts
index 355cf3695..67887d3bb 100644
--- a/federation/src/client/AuthenticationClientFactory.ts
+++ b/federation/src/client/AuthenticationClientFactory.ts
@@ -1,20 +1,18 @@
 import { FederatedCommunity as DbFederatedCommunity } from '@entity/FederatedCommunity'
-// eslint-disable-next-line camelcase
+
 import { AuthenticationClient as V1_0_AuthenticationClient } from './1_0/AuthenticationClient'
-// eslint-disable-next-line camelcase
+
 import { AuthenticationClient as V1_1_AuthenticationClient } from './1_1/AuthenticationClient'
 import { ApiVersionType } from './enum/ApiVersionType'
 
-// eslint-disable-next-line camelcase
 type AuthenticationClient = V1_0_AuthenticationClient | V1_1_AuthenticationClient
 
 interface AuthenticationClientInstance {
   id: number
-  // eslint-disable-next-line no-use-before-define
+
   client: AuthenticationClient
 }
 
-// eslint-disable-next-line @typescript-eslint/no-extraneous-class
 export class AuthenticationClientFactory {
   private static instanceArray: AuthenticationClientInstance[] = []
 
@@ -22,7 +20,7 @@ export class AuthenticationClientFactory {
    * The Singleton's constructor should always be private to prevent direct
    * construction calls with the `new` operator.
    */
-  // eslint-disable-next-line no-useless-constructor, @typescript-eslint/no-empty-function
+
   private constructor() {}
 
   private static createAuthenticationClient = (dbCom: DbFederatedCommunity) => {
diff --git a/federation/src/config/index.ts b/federation/src/config/index.ts
index 6649e2ba3..6ae02a9c1 100644
--- a/federation/src/config/index.ts
+++ b/federation/src/config/index.ts
@@ -1,6 +1,6 @@
+import { latestDbVersion } from '@dbTools/config/detectLastDBVersion'
 // ATTENTION: DO NOT PUT ANY SECRETS IN HERE (or the .env)
 import { Decimal } from 'decimal.js-light'
-import { latestDbVersion } from '@dbTools/config/detectLastDBVersion'
 import dotenv from 'dotenv'
 
 import { validate } from '@config/index'
@@ -63,5 +63,3 @@ export const CONFIG = {
 }
 
 validate(schema, CONFIG)
-
-export default CONFIG
diff --git a/federation/src/graphql/api/1_0/logger/GetPublicCommunityInfoResultLogging.view.ts b/federation/src/graphql/api/1_0/logger/GetPublicCommunityInfoResultLogging.view.ts
index 669170b98..fc0c68d30 100644
--- a/federation/src/graphql/api/1_0/logger/GetPublicCommunityInfoResultLogging.view.ts
+++ b/federation/src/graphql/api/1_0/logger/GetPublicCommunityInfoResultLogging.view.ts
@@ -6,7 +6,6 @@ export class GetPublicCommunityInfoResultLoggingView extends AbstractLoggingView
     super()
   }
 
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   public toJSON(): any {
     return {
       name: this.self.name,
diff --git a/federation/src/graphql/api/1_0/logger/SendCoinsArgsLogging.view.ts b/federation/src/graphql/api/1_0/logger/SendCoinsArgsLogging.view.ts
index a12ff6372..bb9c3dd5a 100644
--- a/federation/src/graphql/api/1_0/logger/SendCoinsArgsLogging.view.ts
+++ b/federation/src/graphql/api/1_0/logger/SendCoinsArgsLogging.view.ts
@@ -1,12 +1,11 @@
-import { AbstractLoggingView } from '@logging/AbstractLogging.view'
 import { SendCoinsArgs } from '@/graphql/api/1_0/model/SendCoinsArgs'
+import { AbstractLoggingView } from '@logging/AbstractLogging.view'
 
 export class SendCoinsArgsLoggingView extends AbstractLoggingView {
   public constructor(private self: SendCoinsArgs) {
     super()
   }
 
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   public toJSON(): any {
     return {
       recipientCommunityUuid: this.self.recipientCommunityUuid,
diff --git a/federation/src/graphql/api/1_0/model/Decay.ts b/federation/src/graphql/api/1_0/model/Decay.ts
index 0b710c234..a32b96c13 100644
--- a/federation/src/graphql/api/1_0/model/Decay.ts
+++ b/federation/src/graphql/api/1_0/model/Decay.ts
@@ -1,5 +1,5 @@
 import { Decimal } from 'decimal.js-light'
-import { ObjectType, Field, Int } from 'type-graphql'
+import { Field, Int, ObjectType } from 'type-graphql'
 
 interface DecayInterface {
   balance: Decimal
diff --git a/federation/src/graphql/api/1_0/model/GetPublicCommunityInfoResult.ts b/federation/src/graphql/api/1_0/model/GetPublicCommunityInfoResult.ts
index d51b3af93..5e4710a07 100644
--- a/federation/src/graphql/api/1_0/model/GetPublicCommunityInfoResult.ts
+++ b/federation/src/graphql/api/1_0/model/GetPublicCommunityInfoResult.ts
@@ -1,10 +1,8 @@
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
 import { Community as DbCommunity } from '@entity/Community'
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
+
 import { Field, ObjectType } from 'type-graphql'
 
 @ObjectType()
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
 export class GetPublicCommunityInfoResult {
   constructor(dbCom: DbCommunity) {
     this.publicKey = dbCom.publicKey.toString('hex')
diff --git a/federation/src/graphql/api/1_0/model/GetPublicKeyResult.ts b/federation/src/graphql/api/1_0/model/GetPublicKeyResult.ts
index 696c96cfe..1582ad892 100644
--- a/federation/src/graphql/api/1_0/model/GetPublicKeyResult.ts
+++ b/federation/src/graphql/api/1_0/model/GetPublicKeyResult.ts
@@ -1,8 +1,6 @@
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
 import { Field, ObjectType } from 'type-graphql'
 
 @ObjectType()
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
 export class GetPublicKeyResult {
   constructor(pubKey: string) {
     this.publicKey = pubKey
diff --git a/federation/src/graphql/api/1_0/resolver/AuthenticationResolver.ts b/federation/src/graphql/api/1_0/resolver/AuthenticationResolver.ts
index 393fe3b65..cb683ab2a 100644
--- a/federation/src/graphql/api/1_0/resolver/AuthenticationResolver.ts
+++ b/federation/src/graphql/api/1_0/resolver/AuthenticationResolver.ts
@@ -1,16 +1,15 @@
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-import { Arg, Mutation, Resolver } from 'type-graphql'
+import { CONFIG } from '@/config'
+import { LogError } from '@/server/LogError'
 import { federationLogger as logger } from '@/server/logger'
 import { Community as DbCommunity } from '@entity/Community'
 import { FederatedCommunity as DbFedCommunity } from '@entity/FederatedCommunity'
 import { CommunityLoggingView } from '@logging/CommunityLogging.view'
 import { FederatedCommunityLoggingView } from '@logging/FederatedCommunityLogging.view'
-import { LogError } from '@/server/LogError'
-import { OpenConnectionArgs } from '../model/OpenConnectionArgs'
-import { startAuthentication, startOpenConnectionCallback } from '../util/authenticateCommunity'
-import { OpenConnectionCallbackArgs } from '../model/OpenConnectionCallbackArgs'
-import { CONFIG } from '@/config'
+import { Arg, Mutation, Resolver } from 'type-graphql'
 import { AuthenticationArgs } from '../model/AuthenticationArgs'
+import { OpenConnectionArgs } from '../model/OpenConnectionArgs'
+import { OpenConnectionCallbackArgs } from '../model/OpenConnectionCallbackArgs'
+import { startAuthentication, startOpenConnectionCallback } from '../util/authenticateCommunity'
 
 @Resolver()
 export class AuthenticationResolver {
@@ -30,7 +29,7 @@ export class AuthenticationResolver {
       throw new LogError(`unknown requesting community with publicKey`, pubKeyBuf.toString('hex'))
     }
     logger.debug(`Authentication: found requestedCom:`, new CommunityLoggingView(comA))
-    // no await to respond immediatly and invoke callback-request asynchron
+    // biome-ignore lint/complexity/noVoid: no await to respond immediately and invoke callback-request asynchronously
     void startOpenConnectionCallback(args, comA, CONFIG.FEDERATION_API)
     return true
   }
@@ -53,7 +52,7 @@ export class AuthenticationResolver {
       `Authentication: found fedComB and start authentication:`,
       new FederatedCommunityLoggingView(fedComB),
     )
-    // no await to respond immediatly and invoke authenticate-request asynchron
+    // biome-ignore lint/complexity/noVoid: no await to respond immediately and invoke authenticate-request asynchronously
     void startAuthentication(args.oneTimeCode, fedComB)
     return true
   }
diff --git a/federation/src/graphql/api/1_0/resolver/PublicCommunityInfoResolver.test.ts b/federation/src/graphql/api/1_0/resolver/PublicCommunityInfoResolver.test.ts
index 2f83b4819..8bdece2dd 100644
--- a/federation/src/graphql/api/1_0/resolver/PublicCommunityInfoResolver.test.ts
+++ b/federation/src/graphql/api/1_0/resolver/PublicCommunityInfoResolver.test.ts
@@ -1,10 +1,9 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
-/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
-import { createTestClient } from 'apollo-server-testing'
-import createServer from '@/server/createServer'
-import { Community as DbCommunity } from '@entity/Community'
-import CONFIG from '@/config'
+import { CONFIG } from '@/config'
+import { createServer } from '@/server/createServer'
 import { Connection } from '@dbTools/typeorm'
+import { Community as DbCommunity } from '@entity/Community'
+
+import { createTestClient } from 'apollo-server-testing'
 
 let query: any
 
diff --git a/federation/src/graphql/api/1_0/resolver/PublicCommunityInfoResolver.ts b/federation/src/graphql/api/1_0/resolver/PublicCommunityInfoResolver.ts
index c1535b713..6ddb1f331 100644
--- a/federation/src/graphql/api/1_0/resolver/PublicCommunityInfoResolver.ts
+++ b/federation/src/graphql/api/1_0/resolver/PublicCommunityInfoResolver.ts
@@ -1,9 +1,8 @@
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-import { Query, Resolver } from 'type-graphql'
 import { federationLogger as logger } from '@/server/logger'
 import { Community as DbCommunity } from '@entity/Community'
-import { GetPublicCommunityInfoResult } from '../model/GetPublicCommunityInfoResult'
+import { Query, Resolver } from 'type-graphql'
 import { GetPublicCommunityInfoResultLoggingView } from '../logger/GetPublicCommunityInfoResultLogging.view'
+import { GetPublicCommunityInfoResult } from '../model/GetPublicCommunityInfoResult'
 
 @Resolver()
 export class PublicCommunityInfoResolver {
diff --git a/federation/src/graphql/api/1_0/resolver/PublicKeyResolver.test.ts b/federation/src/graphql/api/1_0/resolver/PublicKeyResolver.test.ts
index eafd9cba7..cb5682876 100644
--- a/federation/src/graphql/api/1_0/resolver/PublicKeyResolver.test.ts
+++ b/federation/src/graphql/api/1_0/resolver/PublicKeyResolver.test.ts
@@ -1,9 +1,7 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
-/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
-import { createTestClient } from 'apollo-server-testing'
-import createServer from '@/server/createServer'
+import { CONFIG } from '@/config'
+import { createServer } from '@/server/createServer'
 import { FederatedCommunity as DbFederatedCommunity } from '@entity/FederatedCommunity'
-import CONFIG from '@/config'
+import { createTestClient } from 'apollo-server-testing'
 
 let query: any
 
diff --git a/federation/src/graphql/api/1_0/resolver/PublicKeyResolver.ts b/federation/src/graphql/api/1_0/resolver/PublicKeyResolver.ts
index 3fb3b2c0d..afc4aca67 100644
--- a/federation/src/graphql/api/1_0/resolver/PublicKeyResolver.ts
+++ b/federation/src/graphql/api/1_0/resolver/PublicKeyResolver.ts
@@ -1,7 +1,6 @@
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-import { Query, Resolver } from 'type-graphql'
 import { federationLogger as logger } from '@/server/logger'
 import { FederatedCommunity as DbFederatedCommunity } from '@entity/FederatedCommunity'
+import { Query, Resolver } from 'type-graphql'
 import { GetPublicKeyResult } from '../model/GetPublicKeyResult'
 
 @Resolver()
diff --git a/federation/src/graphql/api/1_0/resolver/SendCoinsResolver.test.ts b/federation/src/graphql/api/1_0/resolver/SendCoinsResolver.test.ts
index d305e1726..89bb12d7a 100644
--- a/federation/src/graphql/api/1_0/resolver/SendCoinsResolver.test.ts
+++ b/federation/src/graphql/api/1_0/resolver/SendCoinsResolver.test.ts
@@ -1,16 +1,14 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
-/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
-import { ApolloServerTestClient } from 'apollo-server-testing'
+import { CONFIG } from '@/config'
+import { fullName } from '@/graphql/util/fullName'
+import { Connection } from '@dbTools/typeorm'
 import { Community as DbCommunity } from '@entity/Community'
-import CONFIG from '@/config'
 import { User as DbUser } from '@entity/User'
 import { UserContact as DbUserContact } from '@entity/UserContact'
-import { fullName } from '@/graphql/util/fullName'
-import { GraphQLError } from 'graphql'
 import { cleanDB, testEnvironment } from '@test/helpers'
 import { logger } from '@test/testSetup'
-import { Connection } from '@dbTools/typeorm'
+import { ApolloServerTestClient } from 'apollo-server-testing'
 import Decimal from 'decimal.js-light'
+import { GraphQLError } from 'graphql'
 import { SendCoinsArgs } from '../model/SendCoinsArgs'
 
 let mutate: ApolloServerTestClient['mutate'] // , con: Connection
diff --git a/federation/src/graphql/api/1_0/resolver/SendCoinsResolver.ts b/federation/src/graphql/api/1_0/resolver/SendCoinsResolver.ts
index e90a7818c..b299286fd 100644
--- a/federation/src/graphql/api/1_0/resolver/SendCoinsResolver.ts
+++ b/federation/src/graphql/api/1_0/resolver/SendCoinsResolver.ts
@@ -1,22 +1,22 @@
-import { Arg, Mutation, Resolver } from 'type-graphql'
+import { findUserByIdentifier } from '@/graphql/util/findUserByIdentifier'
+import { fullName } from '@/graphql/util/fullName'
+import { LogError } from '@/server/LogError'
 import { federationLogger as logger } from '@/server/logger'
-import { PendingTransactionLoggingView } from '@logging/PendingTransactionLogging.view'
 import { Community as DbCommunity } from '@entity/Community'
 import { PendingTransaction as DbPendingTransaction } from '@entity/PendingTransaction'
-import { SendCoinsArgs } from '../model/SendCoinsArgs'
-import { LogError } from '@/server/LogError'
+import { PendingTransactionLoggingView } from '@logging/PendingTransactionLogging.view'
+import Decimal from 'decimal.js-light'
+import { Arg, Mutation, Resolver } from 'type-graphql'
 import { PendingTransactionState } from '../enum/PendingTransactionState'
 import { TransactionTypeId } from '../enum/TransactionTypeId'
+import { SendCoinsArgsLoggingView } from '../logger/SendCoinsArgsLogging.view'
+import { SendCoinsArgs } from '../model/SendCoinsArgs'
+import { SendCoinsResult } from '../model/SendCoinsResult'
 import { calculateRecipientBalance } from '../util/calculateRecipientBalance'
-import { fullName } from '@/graphql/util/fullName'
-import { settlePendingReceiveTransaction } from '../util/settlePendingReceiveTransaction'
 // import { checkTradingLevel } from '@/graphql/util/checkTradingLevel'
 import { revertSettledReceiveTransaction } from '../util/revertSettledReceiveTransaction'
-import { findUserByIdentifier } from '@/graphql/util/findUserByIdentifier'
-import { SendCoinsResult } from '../model/SendCoinsResult'
-import Decimal from 'decimal.js-light'
+import { settlePendingReceiveTransaction } from '../util/settlePendingReceiveTransaction'
 import { storeForeignUser } from '../util/storeForeignUser'
-import { SendCoinsArgsLoggingView } from '../logger/SendCoinsArgsLogging.view'
 
 @Resolver()
 export class SendCoinsResolver {
diff --git a/federation/src/graphql/api/1_0/util/authenticateCommunity.ts b/federation/src/graphql/api/1_0/util/authenticateCommunity.ts
index 1d3365d9c..150d01c69 100644
--- a/federation/src/graphql/api/1_0/util/authenticateCommunity.ts
+++ b/federation/src/graphql/api/1_0/util/authenticateCommunity.ts
@@ -1,16 +1,16 @@
-import { OpenConnectionArgs } from '../model/OpenConnectionArgs'
+import { federationLogger as logger } from '@/server/logger'
 import { Community as DbCommunity } from '@entity/Community'
 import { FederatedCommunity as DbFedCommunity } from '@entity/FederatedCommunity'
-import { federationLogger as logger } from '@/server/logger'
+import { OpenConnectionArgs } from '../model/OpenConnectionArgs'
 import { OpenConnectionCallbackArgs } from '../model/OpenConnectionCallbackArgs'
-// eslint-disable-next-line camelcase
-import { randombytes_random } from 'sodium-native'
+
 import { AuthenticationClientFactory } from '@/client/AuthenticationClientFactory'
-// eslint-disable-next-line camelcase
+import { randombytes_random } from 'sodium-native'
+
 import { AuthenticationClient as V1_0_AuthenticationClient } from '@/client/1_0/AuthenticationClient'
-import { AuthenticationArgs } from '../model/AuthenticationArgs'
 import { CommunityLoggingView } from '@logging/CommunityLogging.view'
 import { FederatedCommunityLoggingView } from '@logging/FederatedCommunityLogging.view'
+import { AuthenticationArgs } from '../model/AuthenticationArgs'
 
 export async function startOpenConnectionCallback(
   args: OpenConnectionArgs,
@@ -41,7 +41,7 @@ export async function startOpenConnectionCallback(
     )
 
     const client = AuthenticationClientFactory.getInstance(fedComA)
-    // eslint-disable-next-line camelcase
+
     if (client instanceof V1_0_AuthenticationClient) {
       const callbackArgs = new OpenConnectionCallbackArgs()
       callbackArgs.oneTimeCode = oneTimeCode.toString()
@@ -74,7 +74,7 @@ export async function startAuthentication(
 
     // TODO encrypt homeCom.uuid with homeCom.privateKey and sign it with callbackFedCom.publicKey
     const client = AuthenticationClientFactory.getInstance(fedComB)
-    // eslint-disable-next-line camelcase
+
     if (client instanceof V1_0_AuthenticationClient) {
       const authenticationArgs = new AuthenticationArgs()
       authenticationArgs.oneTimeCode = oneTimeCode
diff --git a/federation/src/graphql/api/1_0/util/calculateRecipientBalance.ts b/federation/src/graphql/api/1_0/util/calculateRecipientBalance.ts
index 1b296f845..198c89289 100644
--- a/federation/src/graphql/api/1_0/util/calculateRecipientBalance.ts
+++ b/federation/src/graphql/api/1_0/util/calculateRecipientBalance.ts
@@ -9,7 +9,9 @@ export async function calculateRecipientBalance(
   time: Date,
 ): Promise<{ balance: Decimal; decay: Decay; lastTransactionId: number } | null> {
   const lastTransaction = await getLastTransaction(userId)
-  if (!lastTransaction) return null
+  if (!lastTransaction) {
+    return null
+  }
 
   const decay = calculateDecay(lastTransaction.balance, lastTransaction.balanceDate, time)
 
diff --git a/federation/src/graphql/api/1_0/util/revertSettledReceiveTransaction.ts b/federation/src/graphql/api/1_0/util/revertSettledReceiveTransaction.ts
index bb5adec5c..c9a522ba8 100644
--- a/federation/src/graphql/api/1_0/util/revertSettledReceiveTransaction.ts
+++ b/federation/src/graphql/api/1_0/util/revertSettledReceiveTransaction.ts
@@ -1,7 +1,3 @@
-/* eslint-disable @typescript-eslint/restrict-template-expressions */
-/* eslint-disable new-cap */
-/* eslint-disable @typescript-eslint/no-non-null-assertion */
-
 import { getConnection } from '@dbTools/typeorm'
 import { Community as DbCommunity } from '@entity/Community'
 import { PendingTransaction as DbPendingTransaction } from '@entity/PendingTransaction'
@@ -13,12 +9,12 @@ import { PendingTransactionState } from '../enum/PendingTransactionState'
 import { LogError } from '@/server/LogError'
 import { federationLogger as logger } from '@/server/logger'
 
-import { getLastTransaction } from '@/graphql/util/getLastTransaction'
 import { TRANSACTIONS_LOCK } from '@/graphql/util/TRANSACTIONS_LOCK'
+import { getLastTransaction } from '@/graphql/util/getLastTransaction'
 import { CommunityLoggingView } from '@logging/CommunityLogging.view'
-import { UserLoggingView } from '@logging/UserLogging.view'
 import { PendingTransactionLoggingView } from '@logging/PendingTransactionLogging.view'
 import { TransactionLoggingView } from '@logging/TransactionLogging.view'
+import { UserLoggingView } from '@logging/UserLogging.view'
 
 export async function revertSettledReceiveTransaction(
   homeCom: DbCommunity,
diff --git a/federation/src/graphql/api/1_0/util/settlePendingReceiveTransaction.ts b/federation/src/graphql/api/1_0/util/settlePendingReceiveTransaction.ts
index 0eadbe1c2..3d024e980 100644
--- a/federation/src/graphql/api/1_0/util/settlePendingReceiveTransaction.ts
+++ b/federation/src/graphql/api/1_0/util/settlePendingReceiveTransaction.ts
@@ -1,7 +1,3 @@
-/* eslint-disable @typescript-eslint/restrict-template-expressions */
-/* eslint-disable new-cap */
-/* eslint-disable @typescript-eslint/no-non-null-assertion */
-
 import { getConnection } from '@dbTools/typeorm'
 import { Community as DbCommunity } from '@entity/Community'
 import { PendingTransaction as DbPendingTransaction } from '@entity/PendingTransaction'
@@ -13,14 +9,14 @@ import { PendingTransactionState } from '../enum/PendingTransactionState'
 import { LogError } from '@/server/LogError'
 import { federationLogger as logger } from '@/server/logger'
 
-import { getLastTransaction } from '@/graphql/util/getLastTransaction'
 import { TRANSACTIONS_LOCK } from '@/graphql/util/TRANSACTIONS_LOCK'
-import { calculateRecipientBalance } from './calculateRecipientBalance'
-import Decimal from 'decimal.js-light'
+import { getLastTransaction } from '@/graphql/util/getLastTransaction'
 import { CommunityLoggingView } from '@logging/CommunityLogging.view'
-import { UserLoggingView } from '@logging/UserLogging.view'
 import { PendingTransactionLoggingView } from '@logging/PendingTransactionLogging.view'
 import { TransactionLoggingView } from '@logging/TransactionLogging.view'
+import { UserLoggingView } from '@logging/UserLogging.view'
+import Decimal from 'decimal.js-light'
+import { calculateRecipientBalance } from './calculateRecipientBalance'
 
 export async function settlePendingReceiveTransaction(
   homeCom: DbCommunity,
diff --git a/federation/src/graphql/api/1_0/util/storeForeignUser.ts b/federation/src/graphql/api/1_0/util/storeForeignUser.ts
index 861702d11..46e642795 100644
--- a/federation/src/graphql/api/1_0/util/storeForeignUser.ts
+++ b/federation/src/graphql/api/1_0/util/storeForeignUser.ts
@@ -1,9 +1,9 @@
 import { User as DbUser } from '@entity/User'
 
 import { federationLogger as logger } from '@/server/logger'
-import { SendCoinsArgs } from '../model/SendCoinsArgs'
 import { UserLoggingView } from '@logging/UserLogging.view'
 import { SendCoinsArgsLoggingView } from '../logger/SendCoinsArgsLogging.view'
+import { SendCoinsArgs } from '../model/SendCoinsArgs'
 
 export async function storeForeignUser(args: SendCoinsArgs): Promise<boolean> {
   if (args.senderCommunityUuid !== null && args.senderUserUuid !== null) {
diff --git a/federation/src/graphql/api/1_1/resolver/PublicKeyResolver.test.ts b/federation/src/graphql/api/1_1/resolver/PublicKeyResolver.test.ts
index 7ccec73af..ec0f652cc 100644
--- a/federation/src/graphql/api/1_1/resolver/PublicKeyResolver.test.ts
+++ b/federation/src/graphql/api/1_1/resolver/PublicKeyResolver.test.ts
@@ -1,9 +1,7 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
-/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
-import { createTestClient } from 'apollo-server-testing'
-import createServer from '@/server/createServer'
+import { CONFIG } from '@/config'
+import { createServer } from '@/server/createServer'
 import { FederatedCommunity as DbFederatedCommunity } from '@entity/FederatedCommunity'
-import CONFIG from '@/config'
+import { createTestClient } from 'apollo-server-testing'
 
 let query: any
 
diff --git a/federation/src/graphql/api/1_1/resolver/PublicKeyResolver.ts b/federation/src/graphql/api/1_1/resolver/PublicKeyResolver.ts
index e03b36075..3cc9ed62b 100644
--- a/federation/src/graphql/api/1_1/resolver/PublicKeyResolver.ts
+++ b/federation/src/graphql/api/1_1/resolver/PublicKeyResolver.ts
@@ -1,8 +1,6 @@
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
 import { Resolver } from 'type-graphql'
-// eslint-disable-next-line camelcase
+
 import { PublicKeyResolver as PublicKeyResolver_1_0 } from '../../1_0/resolver/PublicKeyResolver'
 
 @Resolver()
-// eslint-disable-next-line camelcase, @typescript-eslint/no-unused-vars
 export class PublicKeyResolver extends PublicKeyResolver_1_0 {}
diff --git a/federation/src/graphql/api/schema.ts b/federation/src/graphql/api/schema.ts
index 6ba0bff56..84e756af3 100644
--- a/federation/src/graphql/api/schema.ts
+++ b/federation/src/graphql/api/schema.ts
@@ -1,7 +1,7 @@
-import path from 'path'
-// config
-import CONFIG from '../../config'
+import path from 'node:path'
 import { federationLogger as logger } from '@/server/logger'
+// config
+import { CONFIG } from '../../config'
 
 export const getApiResolvers = (): string => {
   logger.info(`getApiResolvers...${CONFIG.FEDERATION_API}`)
diff --git a/federation/src/graphql/scalar/Decimal.ts b/federation/src/graphql/scalar/Decimal.ts
index 96804bdfa..f539685f9 100644
--- a/federation/src/graphql/scalar/Decimal.ts
+++ b/federation/src/graphql/scalar/Decimal.ts
@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/no-unsafe-argument */
 import { Decimal } from 'decimal.js-light'
 import { GraphQLScalarType, Kind } from 'graphql'
 
diff --git a/federation/src/graphql/schema.ts b/federation/src/graphql/schema.ts
index 9d39f1398..64a35dd76 100644
--- a/federation/src/graphql/schema.ts
+++ b/federation/src/graphql/schema.ts
@@ -1,12 +1,12 @@
 import { GraphQLSchema } from 'graphql'
 import { buildSchema } from 'type-graphql'
 
-// import isAuthorized from './directive/isAuthorized'
-import { DecimalScalar } from './scalar/Decimal'
 import { Decimal } from 'decimal.js-light'
 import { getApiResolvers } from './api/schema'
+// import isAuthorized from './directive/isAuthorized'
+import { DecimalScalar } from './scalar/Decimal'
 
-const schema = async (): Promise<GraphQLSchema> => {
+export const schema = async (): Promise<GraphQLSchema> => {
   return await buildSchema({
     resolvers: [getApiResolvers()],
     // authChecker: isAuthorized,
@@ -23,5 +23,3 @@ const schema = async (): Promise<GraphQLSchema> => {
     */
   })
 }
-
-export default schema
diff --git a/federation/src/graphql/util/checkTradingLevel.ts b/federation/src/graphql/util/checkTradingLevel.ts
index 9f5463a0d..4bc5be988 100644
--- a/federation/src/graphql/util/checkTradingLevel.ts
+++ b/federation/src/graphql/util/checkTradingLevel.ts
@@ -1,7 +1,7 @@
-import CONFIG from '@/config'
+import { CONFIG } from '@/config'
+import { federationLogger as logger } from '@/server/logger'
 import { Community as DbCommunity } from '@entity/Community'
 import { Decimal } from 'decimal.js-light'
-import { federationLogger as logger } from '@/server/logger'
 
 export async function checkTradingLevel(homeCom: DbCommunity, amount: Decimal): Promise<boolean> {
   const tradingLevel = CONFIG.FEDERATION_TRADING_LEVEL
diff --git a/federation/src/graphql/util/decay.test.ts b/federation/src/graphql/util/decay.test.ts
index 1d4ebab3b..f419982ac 100644
--- a/federation/src/graphql/util/decay.test.ts
+++ b/federation/src/graphql/util/decay.test.ts
@@ -1,6 +1,6 @@
 import { Decimal } from 'decimal.js-light'
 
-import { decayFormula, calculateDecay } from './decay'
+import { calculateDecay, decayFormula } from './decay'
 
 describe('utils/decay', () => {
   describe('decayFormula', () => {
@@ -16,7 +16,7 @@ describe('utils/decay', () => {
       expect(decayFormula(amount, seconds).toString()).toBe('1.000000021964959992727444')
     })
     // we get pretty close, but not exact here, skipping
-    // eslint-disable-next-line jest/no-disabled-tests
+
     it.skip('has correct forward calculation', () => {
       const amount = new Decimal(1.0).div(
         new Decimal('0.99999997803504048973201202316767079413460520837376'),
diff --git a/federation/src/graphql/util/decay.ts b/federation/src/graphql/util/decay.ts
index f195075ff..331d3b5b4 100644
--- a/federation/src/graphql/util/decay.ts
+++ b/federation/src/graphql/util/decay.ts
@@ -1,7 +1,7 @@
 import { Decimal } from 'decimal.js-light'
 
+import { CONFIG } from '@/config'
 import { LogError } from '@/server/LogError'
-import CONFIG from '@/config'
 import { Decay } from '../api/1_0/model/Decay'
 
 // TODO: externalize all those definitions and functions into an external decay library
diff --git a/federation/src/graphql/util/validateAlias.ts b/federation/src/graphql/util/validateAlias.ts
index cd2d8fe1f..66d9e8595 100644
--- a/federation/src/graphql/util/validateAlias.ts
+++ b/federation/src/graphql/util/validateAlias.ts
@@ -24,11 +24,18 @@ const RESERVED_ALIAS = [
 ]
 
 export const validateAlias = async (alias: string): Promise<boolean> => {
-  if (alias.length < 3) throw new LogError('Given alias is too short', alias)
-  if (alias.length > 20) throw new LogError('Given alias is too long', alias)
-  if (!alias.match(VALID_ALIAS_REGEX)) throw new LogError('Invalid characters in alias', alias)
-  if (RESERVED_ALIAS.includes(alias.toLowerCase()))
+  if (alias.length < 3) {
+    throw new LogError('Given alias is too short', alias)
+  }
+  if (alias.length > 20) {
+    throw new LogError('Given alias is too long', alias)
+  }
+  if (!alias.match(VALID_ALIAS_REGEX)) {
+    throw new LogError('Invalid characters in alias', alias)
+  }
+  if (RESERVED_ALIAS.includes(alias.toLowerCase())) {
     throw new LogError('Alias is not allowed', alias)
+  }
   const aliasInUse = await DbUser.find({
     where: { alias: Raw((a) => `LOWER(${a}) = "${alias.toLowerCase()}"`) },
   })
diff --git a/federation/src/index.ts b/federation/src/index.ts
index bdc66c87a..5c3cc6f89 100644
--- a/federation/src/index.ts
+++ b/federation/src/index.ts
@@ -1,22 +1,20 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
-
 import { createServer } from './server/createServer'
 
 // config
 import { CONFIG } from './config'
 
 async function main() {
-  // eslint-disable-next-line no-console
+  // biome-ignore lint/suspicious/noConsole: no logger needed fot startup infos
   console.log(`FEDERATION_PORT=${CONFIG.FEDERATION_PORT}`)
-  // eslint-disable-next-line no-console
+  // biome-ignore lint/suspicious/noConsole: no logger needed fot startup infos
   console.log(`FEDERATION_API=${CONFIG.FEDERATION_API}`)
   const { app } = await createServer()
 
   app.listen(CONFIG.FEDERATION_PORT, () => {
-    // eslint-disable-next-line no-console
+    // biome-ignore lint/suspicious/noConsole: no logger needed fot startup infos
     console.log(`Server is running at http://localhost:${CONFIG.FEDERATION_PORT}`)
     if (CONFIG.GRAPHIQL) {
-      // eslint-disable-next-line no-console
+      // biome-ignore lint/suspicious/noConsole: no logger needed fot startup infos
       console.log(
         `GraphIQL available at ${CONFIG.FEDERATION_COMMUNITY_URL}/api/${CONFIG.FEDERATION_API}`,
       )
@@ -25,7 +23,7 @@ async function main() {
 }
 
 main().catch((e) => {
-  // eslint-disable-next-line no-console
+  // biome-ignore lint/suspicious/noConsole: no logger present
   console.error(e)
   process.exit(1)
 })
diff --git a/federation/src/server/LogError.ts b/federation/src/server/LogError.ts
index b29e83dc8..fbd6e6d18 100644
--- a/federation/src/server/LogError.ts
+++ b/federation/src/server/LogError.ts
@@ -1,8 +1,6 @@
-/* eslint-disable @typescript-eslint/no-unsafe-argument */
 import { federationLogger as logger } from './logger'
 
 export class LogError extends Error {
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   constructor(msg: string, ...details: any[]) {
     super(msg)
     logger.error(msg, ...details)
diff --git a/federation/src/server/cors.ts b/federation/src/server/cors.ts
index e76ed1591..873d6a2eb 100644
--- a/federation/src/server/cors.ts
+++ b/federation/src/server/cors.ts
@@ -5,4 +5,5 @@ const corsOptions = {
   exposedHeaders: ['token'],
 }
 
+// biome-ignore lint/style/noDefaultExport: <explanation>
 export default cors(corsOptions)
diff --git a/federation/src/server/createServer.ts b/federation/src/server/createServer.ts
index 3d3b80dd6..5ca697bd2 100644
--- a/federation/src/server/createServer.ts
+++ b/federation/src/server/createServer.ts
@@ -3,29 +3,29 @@ import 'reflect-metadata'
 import { ApolloServer } from 'apollo-server-express'
 import express, { Express } from 'express'
 
-// database
-import connection from '@/typeorm/connection'
 import { checkDBVersion } from '@/typeorm/DBVersion'
+// database
+import { connection } from '@/typeorm/connection'
 
 // server
 import cors from './cors'
 // import serverContext from './context'
-import plugins from './plugins'
+import { plugins } from './plugins'
 
 // config
 import { CONFIG } from '@/config'
 
 // graphql
-import schema from '@/graphql/schema'
+import { schema } from '@/graphql/schema'
 
 // webhooks
 // import { elopageWebhook } from '@/webhook/elopage'
 import { Connection } from '@dbTools/typeorm'
 
-import { apolloLogger } from './logger'
-import { Logger } from 'log4js'
-import helmet from 'helmet'
 import { slowDown } from 'express-slow-down'
+import helmet from 'helmet'
+import { Logger } from 'log4js'
+import { apolloLogger } from './logger'
 
 // i18n
 // import { i18n } from './localization'
@@ -36,7 +36,6 @@ import { slowDown } from 'express-slow-down'
 type ServerDef = { apollo: ApolloServer; app: Express; con: Connection }
 
 export const createServer = async (
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   // context: any = serverContext,
   logger: Logger = apolloLogger,
   // localization: i18n.I18n = i18n,
@@ -112,5 +111,3 @@ export const createServer = async (
 
   return { apollo, app, con }
 }
-
-export default createServer
diff --git a/federation/src/server/logger.ts b/federation/src/server/logger.ts
index dd2a50cf3..505c7e4d8 100644
--- a/federation/src/server/logger.ts
+++ b/federation/src/server/logger.ts
@@ -1,5 +1,5 @@
+import { CONFIG } from '@/config'
 import log4js from 'log4js'
-import CONFIG from '@/config'
 
 import { readFileSync } from 'fs'
 
diff --git a/federation/src/server/plugins.ts b/federation/src/server/plugins.ts
index 7ecbedf2a..cde1d6a03 100644
--- a/federation/src/server/plugins.ts
+++ b/federation/src/server/plugins.ts
@@ -1,6 +1,3 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
-/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
-
 import clonedeep from 'lodash.clonedeep'
 
 const setHeadersPlugin = {
@@ -23,8 +20,12 @@ const setHeadersPlugin = {
 
 const filterVariables = (variables: any) => {
   const vars = clonedeep(variables)
-  if (vars && vars.password) vars.password = '***'
-  if (vars && vars.passwordNew) vars.passwordNew = '***'
+  if (vars && vars.password) {
+    vars.password = '***'
+  }
+  if (vars && vars.passwordNew) {
+    vars.passwordNew = '***'
+  }
   return vars
 }
 
@@ -39,15 +40,18 @@ ${mutation || query}variables: ${JSON.stringify(filterVariables(variables), null
     return {
       willSendResponse(requestContext: any) {
         if (operationName !== 'IntrospectionQuery') {
-          if (requestContext.context.user) logger.info(`User ID: ${requestContext.context.user.id}`)
+          if (requestContext.context.user) {
+            logger.info(`User ID: ${requestContext.context.user.id}`)
+          }
           if (requestContext.response.data) {
             logger.info('Response Success!')
             logger.trace(`Response-Data:
 ${JSON.stringify(requestContext.response.data, null, 2)}`)
           }
-          if (requestContext.response.errors)
+          if (requestContext.response.errors) {
             logger.error(`Response-Errors:
 ${JSON.stringify(requestContext.response.errors, null, 2)}`)
+          }
         }
         return requestContext
       },
@@ -55,7 +59,5 @@ ${JSON.stringify(requestContext.response.errors, null, 2)}`)
   },
 }
 
-const plugins =
+export const plugins =
   process.env.NODE_ENV === 'development' ? [setHeadersPlugin] : [setHeadersPlugin, logPlugin]
-
-export default plugins
diff --git a/federation/src/typeorm/DBVersion.ts b/federation/src/typeorm/DBVersion.ts
index 267dfd57e..08287f396 100644
--- a/federation/src/typeorm/DBVersion.ts
+++ b/federation/src/typeorm/DBVersion.ts
@@ -1,5 +1,5 @@
-import { Migration } from '@entity/Migration'
 import { federationLogger as logger } from '@/server/logger'
+import { Migration } from '@entity/Migration'
 
 const getDBVersion = async (): Promise<string | null> => {
   try {
diff --git a/federation/src/typeorm/connection.ts b/federation/src/typeorm/connection.ts
index d08d935d4..9a0d8f224 100644
--- a/federation/src/typeorm/connection.ts
+++ b/federation/src/typeorm/connection.ts
@@ -1,7 +1,7 @@
 // TODO This is super weird - since the entities are defined in another project they have their own globals.
 //      We cannot use our connection here, but must use the external typeorm installation
-import { Connection, createConnection, FileLogger } from '@dbTools/typeorm'
-import CONFIG from '@/config'
+import { CONFIG } from '@/config'
+import { Connection, FileLogger, createConnection } from '@dbTools/typeorm'
 import { entities } from '@entity/index'
 
 const connection = async (): Promise<Connection | null> => {
@@ -25,10 +25,10 @@ const connection = async (): Promise<Connection | null> => {
       },
     })
   } catch (error) {
-    // eslint-disable-next-line no-console
+    // biome-ignore lint/suspicious/noConsole: no logger present
     console.log(error)
     return null
   }
 }
 
-export default connection
+export { connection }
diff --git a/federation/test/extensions.ts b/federation/test/extensions.ts
index 262a9bcdb..e27dc54ab 100644
--- a/federation/test/extensions.ts
+++ b/federation/test/extensions.ts
@@ -1,8 +1,8 @@
-/* eslint-disable @typescript-eslint/no-unsafe-call */
-/* eslint-disable @typescript-eslint/no-unsafe-member-access */
-/* eslint-disable @typescript-eslint/restrict-template-expressions */
-/* eslint-disable @typescript-eslint/no-empty-interface */
-/* eslint-disable @typescript-eslint/no-unsafe-argument */
+
+
+
+
+
 
 import { Decimal } from 'decimal.js-light'
 
@@ -28,7 +28,7 @@ interface CustomMatchers<R = unknown> {
 }
 
 declare global {
-  // eslint-disable-next-line @typescript-eslint/no-namespace
+
   namespace jest {
     interface Expect extends CustomMatchers {}
     interface Matchers<R> extends CustomMatchers<R> {}
diff --git a/federation/test/helpers.ts b/federation/test/helpers.ts
index 67feea5fa..f240e4a36 100644
--- a/federation/test/helpers.ts
+++ b/federation/test/helpers.ts
@@ -1,9 +1,9 @@
-/* eslint-disable @typescript-eslint/unbound-method */
-/* eslint-disable @typescript-eslint/no-unsafe-assignment */
-/* eslint-disable @typescript-eslint/no-unsafe-member-access */
-/* eslint-disable @typescript-eslint/no-explicit-any */
-/* eslint-disable @typescript-eslint/no-unsafe-call */
-/* eslint-disable @typescript-eslint/no-unsafe-return */
+
+
+
+
+
+
 
 import { entities } from '@entity/index'
 import { createTestClient } from 'apollo-server-testing'
diff --git a/federation/yarn.lock b/federation/yarn.lock
index 30b56b378..f8f1525ff 100644
--- a/federation/yarn.lock
+++ b/federation/yarn.lock
@@ -335,6 +335,60 @@
   resolved "https://registry.yarnpkg.com/@bcoe/v8-coverage/-/v8-coverage-0.2.3.tgz#75a2e8b51cb758a7553d6804a5932d7aace75c39"
   integrity sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==
 
+"@biomejs/biome@1.9.4":
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/@biomejs/biome/-/biome-1.9.4.tgz#89766281cbc3a0aae865a7ff13d6aaffea2842bf"
+  integrity sha512-1rkd7G70+o9KkTn5KLmDYXihGoTaIGO9PIIN2ZB7UJxFrWw04CZHPYiMRjYsaDvVV7hP1dYNRLxSANLaBFGpog==
+  optionalDependencies:
+    "@biomejs/cli-darwin-arm64" "1.9.4"
+    "@biomejs/cli-darwin-x64" "1.9.4"
+    "@biomejs/cli-linux-arm64" "1.9.4"
+    "@biomejs/cli-linux-arm64-musl" "1.9.4"
+    "@biomejs/cli-linux-x64" "1.9.4"
+    "@biomejs/cli-linux-x64-musl" "1.9.4"
+    "@biomejs/cli-win32-arm64" "1.9.4"
+    "@biomejs/cli-win32-x64" "1.9.4"
+
+"@biomejs/cli-darwin-arm64@1.9.4":
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/@biomejs/cli-darwin-arm64/-/cli-darwin-arm64-1.9.4.tgz#dfa376d23a54a2d8f17133c92f23c1bf2e62509f"
+  integrity sha512-bFBsPWrNvkdKrNCYeAp+xo2HecOGPAy9WyNyB/jKnnedgzl4W4Hb9ZMzYNbf8dMCGmUdSavlYHiR01QaYR58cw==
+
+"@biomejs/cli-darwin-x64@1.9.4":
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/@biomejs/cli-darwin-x64/-/cli-darwin-x64-1.9.4.tgz#eafc2ce3849d385fc02238aad1ca4a73395a64d9"
+  integrity sha512-ngYBh/+bEedqkSevPVhLP4QfVPCpb+4BBe2p7Xs32dBgs7rh9nY2AIYUL6BgLw1JVXV8GlpKmb/hNiuIxfPfZg==
+
+"@biomejs/cli-linux-arm64-musl@1.9.4":
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/@biomejs/cli-linux-arm64-musl/-/cli-linux-arm64-musl-1.9.4.tgz#d780c3e01758fc90f3268357e3f19163d1f84fca"
+  integrity sha512-v665Ct9WCRjGa8+kTr0CzApU0+XXtRgwmzIf1SeKSGAv+2scAlW6JR5PMFo6FzqqZ64Po79cKODKf3/AAmECqA==
+
+"@biomejs/cli-linux-arm64@1.9.4":
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/@biomejs/cli-linux-arm64/-/cli-linux-arm64-1.9.4.tgz#8ed1dd0e89419a4b66a47f95aefb8c46ae6041c9"
+  integrity sha512-fJIW0+LYujdjUgJJuwesP4EjIBl/N/TcOX3IvIHJQNsAqvV2CHIogsmA94BPG6jZATS4Hi+xv4SkBBQSt1N4/g==
+
+"@biomejs/cli-linux-x64-musl@1.9.4":
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/@biomejs/cli-linux-x64-musl/-/cli-linux-x64-musl-1.9.4.tgz#f36982b966bd671a36671e1de4417963d7db15fb"
+  integrity sha512-gEhi/jSBhZ2m6wjV530Yy8+fNqG8PAinM3oV7CyO+6c3CEh16Eizm21uHVsyVBEB6RIM8JHIl6AGYCv6Q6Q9Tg==
+
+"@biomejs/cli-linux-x64@1.9.4":
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/@biomejs/cli-linux-x64/-/cli-linux-x64-1.9.4.tgz#a0a7f56680c76b8034ddc149dbf398bdd3a462e8"
+  integrity sha512-lRCJv/Vi3Vlwmbd6K+oQ0KhLHMAysN8lXoCI7XeHlxaajk06u7G+UsFSO01NAs5iYuWKmVZjmiOzJ0OJmGsMwg==
+
+"@biomejs/cli-win32-arm64@1.9.4":
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/@biomejs/cli-win32-arm64/-/cli-win32-arm64-1.9.4.tgz#e2ef4e0084e76b7e26f0fc887c5ef1265ea56200"
+  integrity sha512-tlbhLk+WXZmgwoIKwHIHEBZUwxml7bRJgk0X2sPyNR3S93cdRq6XulAZRQJ17FYGGzWne0fgrXBKpl7l4M87Hg==
+
+"@biomejs/cli-win32-x64@1.9.4":
+  version "1.9.4"
+  resolved "https://registry.yarnpkg.com/@biomejs/cli-win32-x64/-/cli-win32-x64-1.9.4.tgz#4c7afa90e3970213599b4095e62f87e5972b2340"
+  integrity sha512-8Y5wMhVIPaWe6jw2H+KlEm4wP/f7EW3810ZLmDlrEEy5KvBsb9ECEfu/kMWD484ijfQ8+nIi0giMgu9g1UAuuA==
+
 "@cspotcode/source-map-support@^0.8.0":
   version "0.8.1"
   resolved "https://registry.yarnpkg.com/@cspotcode/source-map-support/-/source-map-support-0.8.1.tgz#00629c35a688e05a88b1cda684fb9d5e73f000a1"