From 216f1ccf3667a018d95e09b00be8096e1c52b4a8 Mon Sep 17 00:00:00 2001
From: Javier Esses <javiesses@hotmail.com>
Date: Thu, 24 Sep 2020 13:29:25 -0300
Subject: [PATCH] Authentication module (#49)

* initialize, add and delete credentials

* Authentication reducer

* serviceLogin operation

* npm audit fix

* Changed auth operations to prevent it to fail

* Added tests and validation to auth operations

* Improved tests, readability and return the token to be used by the callback after succesful login

* Rebase

* Moved internal closures out of the function with needed params curried

* Update rif-id-daf version
---
 .gitignore                                    |   3 +
 README.md                                     |   1 +
 package-lock.json                             |  89 ++-
 packages/rif-id-core/package-lock.json        | 657 ++----------------
 packages/rif-id-core/package.json             |   6 +-
 .../src/operations/authentication.ts          |  52 ++
 .../src/reducers/authentication.ts            |  42 ++
 .../test/operations/authentication.test.ts    | 134 ++++
 .../test/reducers/authentication.test.ts      | 179 +++++
 packages/rif-id-core/test/util.ts             |   1 +
 10 files changed, 536 insertions(+), 628 deletions(-)
 create mode 100644 packages/rif-id-core/src/operations/authentication.ts
 create mode 100644 packages/rif-id-core/src/reducers/authentication.ts
 create mode 100644 packages/rif-id-core/test/operations/authentication.test.ts
 create mode 100644 packages/rif-id-core/test/reducers/authentication.test.ts

diff --git a/.gitignore b/.gitignore
index d7b6d1d..a04d660 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,6 @@ lib
 coverage
 junit.xml
 *.sqlite
+
+# logs
+*.log
\ No newline at end of file
diff --git a/README.md b/README.md
index 4714942..fc4b27e 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,7 @@ Setup:
 ```
 npm install
 npm run setup
+npm run build
 ```
 
 First installs global dependencies, then links inner packages, finally installs inner packages dependencies.
diff --git a/package-lock.json b/package-lock.json
index 99279ac..48b8d6b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4768,23 +4768,29 @@
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-          "integrity": "sha1-G3CK8JSknJoOfbyteQq6U52sEXc=",
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+          "resolved": "https://registry.npmjs.org/dot-prop/-/dot-prop-5.3.0.tgz",
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           "dev": true,
           "requires": {
-            "is-obj": "^1.0.0"
+            "is-obj": "^2.0.0"
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+          "resolved": "https://registry.npmjs.org/is-obj/-/is-obj-2.0.0.tgz",
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+          "dev": true
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@@ -4835,13 +4841,40 @@
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+      "resolved": "https://registry.npmjs.org/conventional-changelog-angular/-/conventional-changelog-angular-5.0.11.tgz",
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       "dev": true,
       "requires": {
-        "compare-func": "^1.3.1",
+        "compare-func": "^2.0.0",
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+          "resolved": "https://registry.npmjs.org/compare-func/-/compare-func-2.0.0.tgz",
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+          "dev": true,
+          "requires": {
+            "array-ify": "^1.0.0",
+            "dot-prop": "^5.1.0"
+          }
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+        "dot-prop": {
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+          "resolved": "https://registry.npmjs.org/dot-prop/-/dot-prop-5.3.0.tgz",
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+          "dev": true,
+          "requires": {
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+          }
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+          "resolved": "https://registry.npmjs.org/is-obj/-/is-obj-2.0.0.tgz",
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+          "dev": true
+        }
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@@ -4942,12 +4975,12 @@
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+      "version": "4.0.17",
+      "resolved": "https://registry.npmjs.org/conventional-changelog-writer/-/conventional-changelog-writer-4.0.17.tgz",
+      "integrity": "sha512-IKQuK3bib/n032KWaSb8YlBFds+aLmzENtnKtxJy3+HqDq5kohu3g/UdNbIHeJWygfnEbZjnCKFxAW0y7ArZAw==",
       "dev": true,
       "requires": {
-        "compare-func": "^1.3.1",
+        "compare-func": "^2.0.0",
         "conventional-commits-filter": "^2.0.6",
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@@ -5666,9 +5699,9 @@
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+      "resolved": "https://registry.npmjs.org/dot-prop/-/dot-prop-4.2.1.tgz",
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@@ -11964,9 +11997,9 @@
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-      "resolved": "https://registry.npmjs.org/neo-async/-/neo-async-2.6.1.tgz",
-      "integrity": "sha512-iyam8fBuCUpWeKPGpaNMetEocMt364qkCsfL9JuhjXX6dRnguRVOfk2GZaDpPjcOKiiXCPINZC1GczQ7iTq3Zw==",
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/neo-async/-/neo-async-2.6.2.tgz",
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       "dev": true
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@@ -11982,9 +12015,9 @@
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@@ -14481,9 +14514,9 @@
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diff --git a/packages/rif-id-core/package-lock.json b/packages/rif-id-core/package-lock.json
index 086c674..3f3017f 100644
--- a/packages/rif-id-core/package-lock.json
+++ b/packages/rif-id-core/package-lock.json
@@ -33,47 +33,6 @@
         "ethr-did-registry": "0.0.3"
       }
     },
-    "@rsksmart/rif-id-daf": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/@rsksmart/rif-id-daf/-/rif-id-daf-0.0.3.tgz",
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-      "requires": {
-        "@rsksmart/rif-id-ethr-did": "0.0.1",
-        "@rsksmart/rif-id-mnemonic": "0.0.1",
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-        "daf-ethr-did": "^6.1.2",
-        "typeorm": "0.2.24"
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-    "@rsksmart/rif-id-ethr-did": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/@rsksmart/rif-id-ethr-did/-/rif-id-ethr-did-0.0.1.tgz",
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-        "@types/node": "^14.0.23",
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-        "ethr-did": "^1.1.0",
-        "keccak": "^3.0.0",
-        "lodash": "^4.17.19",
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-    },
-    "@rsksmart/rif-id-mnemonic": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/@rsksmart/rif-id-mnemonic/-/rif-id-mnemonic-0.0.1.tgz",
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@@ -216,7 +146,8 @@
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     },
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@@ -224,14 +155,6 @@
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-          "integrity": "sha1-79qpjqdFEyTQkrKyFjpqHXqaIUc="
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+      "integrity": "sha512-6rt+RN7aOi1nGMyC4Xa5DdYiukl2UWCbcJft7YhxReBGQD7OAM8Pbxw6YMo4r2diNEA8FEmu32YOn9rhaiE5yw==",
+      "dev": true
     },
     "tweetnacl-util": {
       "version": "0.15.1",
       "resolved": "https://registry.npmjs.org/tweetnacl-util/-/tweetnacl-util-0.15.1.tgz",
-      "integrity": "sha512-RKJBIj8lySrShN4w6i/BonWp2Z/uxwC3h4y7xsRrpP59ZboCd0GpEVsOnMDYLMmKBpYhb5TgHzZXy7wTfYFBRw=="
+      "integrity": "sha512-RKJBIj8lySrShN4w6i/BonWp2Z/uxwC3h4y7xsRrpP59ZboCd0GpEVsOnMDYLMmKBpYhb5TgHzZXy7wTfYFBRw==",
+      "dev": true
     },
     "type-is": {
       "version": "1.6.18",
@@ -2487,11 +1965,6 @@
         "mime-types": "~2.1.24"
       }
     },
-    "typeforce": {
-      "version": "1.18.0",
-      "resolved": "https://registry.npmjs.org/typeforce/-/typeforce-1.18.0.tgz",
-      "integrity": "sha512-7uc1O8h1M1g0rArakJdf0uLRSSgFcYexrVoKo+bzJd32gd4gDy2L/Z+8/FjPnU9ydY3pEnVPtr9FyscYY60K1g=="
-    },
     "typeorm": {
       "version": "0.2.24",
       "resolved": "https://registry.npmjs.org/typeorm/-/typeorm-0.2.24.tgz",
@@ -2528,11 +2001,6 @@
         "buffer": "^5.2.1"
       }
     },
-    "util-deprecate": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
-    },
     "utils-merge": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
@@ -2565,14 +2033,6 @@
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
       "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
     },
-    "wif": {
-      "version": "2.0.6",
-      "resolved": "https://registry.npmjs.org/wif/-/wif-2.0.6.tgz",
-      "integrity": "sha1-CNP1IFbGZnkplyb63g1DKudLRwQ=",
-      "requires": {
-        "bs58check": "<3.0.0"
-      }
-    },
     "wrap-ansi": {
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
@@ -2615,7 +2075,8 @@
     "xhr2": {
       "version": "0.1.3",
       "resolved": "https://registry.npmjs.org/xhr2/-/xhr2-0.1.3.tgz",
-      "integrity": "sha1-y/xHWaabSoiOeM9PILBRA4dXvRE="
+      "integrity": "sha1-y/xHWaabSoiOeM9PILBRA4dXvRE=",
+      "dev": true
     },
     "xml2js": {
       "version": "0.4.23",
diff --git a/packages/rif-id-core/package.json b/packages/rif-id-core/package.json
index f636013..da86a07 100644
--- a/packages/rif-id-core/package.json
+++ b/packages/rif-id-core/package.json
@@ -24,10 +24,12 @@
   "homepage": "https://github.com/rsksamrt/rif-identity.js#readme",
   "dependencies": {
     "@reduxjs/toolkit": "^1.4.0",
-    "@rsksmart/rif-id-daf": "0.0.3",
+    "@rsksmart/rif-id-daf": "0.0.5",
     "daf-core": "^6.1.2",
     "daf-did-comm": "^6.3.0",
-    "daf-selective-disclosure": "^6.3.0"
+    "daf-selective-disclosure": "^6.3.0",
+    "daf-w3c": "^6.3.0",
+    "axios": "^0.20.0"
   },
   "devDependencies": {
     "@rsksmart/ethr-did-utils": "^1.0.1",
diff --git a/packages/rif-id-core/src/operations/authentication.ts b/packages/rif-id-core/src/operations/authentication.ts
new file mode 100644
index 0000000..deb5f39
--- /dev/null
+++ b/packages/rif-id-core/src/operations/authentication.ts
@@ -0,0 +1,52 @@
+import { Dispatch } from '@reduxjs/toolkit'
+import { Agent, Credential, Message } from 'daf-core'
+import { Callback, callbackify } from './util'
+import axios from 'axios'
+import { ActionSignW3cVc } from 'daf-w3c'
+import { addServiceToken } from '../reducers/authentication'
+
+const makeLoginCredentialPayload = (issuer: string, subject: string) => (challenge: string) => {
+  if (!challenge) {
+    throw new Error('Server did not return any challenge to login')
+  }
+
+  return {
+    '@context': ['https://www.w3.org/2018/credentials/v1'],
+    type: ['VerifiableCredential'],
+    issuer,
+    credentialSubject: {
+      id: subject,
+      claims: [{ claimType: 'challenge', claimValue: challenge }]
+    }
+  }
+}
+
+const verifyServiceDid = (expectedDid: string) => (message: Message): Credential => {
+  const credential = message.credentials[0]
+
+  if (credential.issuer.did !== expectedDid) {
+    throw new Error('The issuer of the auth credential is not the expected did')
+  }
+
+  return credential
+}
+
+export const serviceAuthenticationFactory = (agent: Agent) => (serviceUrl: string, serviceDid: string, did: string, cb?: Callback<string>) => (dispatch: Dispatch) => callbackify(
+  async () => axios.post(`${serviceUrl}/request-auth`, { did })
+    .then(res => res.status === 200 && !!res.data && res.data.challenge)
+    .then(challenge => makeLoginCredentialPayload(did, serviceDid)(challenge))
+    .then(payload => agent.handleAction({
+      type: 'sign.w3c.vc.jwt',
+      save: false,
+      data: payload
+    } as ActionSignW3cVc))
+    .then(({ raw }) => axios.post(`${serviceUrl}/auth`, { jwt: raw }))
+    .then(res => res.status === 200 && !!res.data && res.data.token)
+    .then(token => agent.handleMessage({ raw: token, metaData: [], save: false }))
+    .then(message => verifyServiceDid(serviceDid)(message))
+    .then(vc => {
+      dispatch(addServiceToken({ identity: did, serviceDid: vc.issuer.did, token: vc.raw }))
+      return vc.raw
+    }),
+  cb
+)
diff --git a/packages/rif-id-core/src/reducers/authentication.ts b/packages/rif-id-core/src/reducers/authentication.ts
new file mode 100644
index 0000000..bd00d96
--- /dev/null
+++ b/packages/rif-id-core/src/reducers/authentication.ts
@@ -0,0 +1,42 @@
+import { createSlice, PayloadAction } from '@reduxjs/toolkit'
+
+export interface ServiceTokens {
+  [serviceDid: string]: string
+}
+
+export interface AuthenticationState {
+  [identity: string]: ServiceTokens
+}
+
+const initialState: AuthenticationState = {}
+
+interface AddServiceTokenPayload {
+  identity: string
+  serviceDid: string
+  token: string
+}
+
+interface RemoveServiceTokenPayload {
+  identity: string
+  serviceDid: string
+}
+
+const authenticationSlice = createSlice({
+  name: 'authentication',
+  initialState,
+  reducers: {
+    addServiceToken (state: AuthenticationState, { payload: { identity, serviceDid, token } }: PayloadAction<AddServiceTokenPayload>) {
+      if (!state[identity]) state[identity] = {}
+      state[identity][serviceDid] = token
+    },
+    removeServiceToken (state: AuthenticationState, { payload: { identity, serviceDid } }: PayloadAction<RemoveServiceTokenPayload>) {
+      if (state[identity]) delete state[identity][serviceDid]
+    }
+  }
+})
+
+export const { addServiceToken, removeServiceToken } = authenticationSlice.actions
+
+export const selectServiceTokenByIdentity = (state: AuthenticationState, identity: string, serviceDid: string) => state[identity] && state[identity][serviceDid]
+
+export default authenticationSlice.reducer
diff --git a/packages/rif-id-core/test/operations/authentication.test.ts b/packages/rif-id-core/test/operations/authentication.test.ts
new file mode 100644
index 0000000..a5bd977
--- /dev/null
+++ b/packages/rif-id-core/test/operations/authentication.test.ts
@@ -0,0 +1,134 @@
+import { Store, AnyAction, configureStore } from '@reduxjs/toolkit'
+import { generateMnemonic } from '@rsksmart/rif-id-mnemonic'
+import { AbstractIdentity, Agent } from 'daf-core'
+import { createAgent, deleteDatabase, did, issueTestCredential } from '../util'
+import authenticationReducer, { AuthenticationState } from '../../src/reducers/authentication'
+import { serviceAuthenticationFactory } from '../../src/operations/authentication'
+import axios from 'axios'
+
+jest.mock('axios')
+const mockedAxios = axios as jest.Mocked<typeof axios>
+
+const mockAxios = (
+  expectedServiceUrl: string, challenge: string, token?: string
+) => {
+  const mockedImplementation = (url: string) => {
+    expect(url.startsWith(expectedServiceUrl)).toBeTruthy()
+
+    let data
+    if (url.indexOf('/request-auth') > -1) {
+      data = { challenge }
+    } else if (url.indexOf('/auth') > -1) {
+      data = { token }
+    } else {
+      return Promise.resolve({ status: 404 })
+    }
+    return Promise.resolve({
+      data,
+      status: 200,
+      statusText: 'OK'
+    })
+  }
+
+  if (token) {
+    return mockedAxios.post
+      .mockImplementationOnce(mockedImplementation)
+      .mockImplementationOnce(mockedImplementation)
+  }
+
+  return mockedAxios.post.mockImplementationOnce(mockedImplementation)
+}
+
+describe('authentication operations', () => {
+  let agent: Agent
+  let database: string
+  let store: Store<AuthenticationState, AnyAction>
+  let serviceAuthentication: ReturnType<typeof serviceAuthenticationFactory>
+  let identity: AbstractIdentity
+  const serviceUrl = 'https://the.service'
+
+  beforeEach(async () => {
+    const mnemonic = generateMnemonic(12)
+    database = `test.rif-id-core.operations.login.${new Date().getTime()}.sqlite`
+    agent = await createAgent(database, { mnemonic })
+    store = configureStore({ reducer: authenticationReducer })
+    serviceAuthentication = serviceAuthenticationFactory(agent)
+
+    identity = await agent.identityManager.createIdentity()
+  })
+
+  afterEach(() => deleteDatabase(agent, database))
+
+  test('should save a login token', async () => {
+    const testCredential = await issueTestCredential(identity.did)
+    const challengeToReturn = '123456789qwerty'
+    const tokenToReturn = testCredential.raw
+    mockAxios(serviceUrl, challengeToReturn, tokenToReturn)
+
+    await serviceAuthentication(serviceUrl, testCredential.issuer.did, identity.did)(store.dispatch)
+
+    const state = store.getState()
+    expect(state[identity.did]).toBeTruthy()
+    expect(state[identity.did][testCredential.issuer.did]).toEqual(tokenToReturn)
+  })
+
+  describe('expect to throw errors', () => {
+    let expectedState: AuthenticationState, actualState: AuthenticationState
+
+    beforeEach(() => {
+      expectedState = store.getState()
+    })
+
+    afterEach(() => {
+      actualState = store.getState()
+      expect(actualState).toEqual(expectedState)
+    })
+
+    test('should throw an error if not expected service did', async () => {
+      const testCredential = await issueTestCredential(identity.did)
+      const challengeToReturn = '123456789qwerty'
+      const tokenToReturn = testCredential.raw
+
+      mockAxios(serviceUrl, challengeToReturn, tokenToReturn)
+
+      const notServiceDid = did
+
+      await serviceAuthentication(serviceUrl, notServiceDid, identity.did)(store.dispatch).catch(e => {
+        expect(e.message).toEqual('The issuer of the auth credential is not the expected did')
+      })
+    })
+
+    test('should throw an error if the server does not send a proper challenge', async () => {
+      const challengeToReturn = undefined
+
+      mockAxios(serviceUrl, challengeToReturn)
+
+      await serviceAuthentication(serviceUrl, 'does not matter', identity.did)(store.dispatch).catch(e => {
+        expect(e.message).toEqual('Server did not return any challenge to login')
+      })
+    })
+
+    test('should throw the agent error if received invalid token', async () => {
+      const challengeToReturn = '123456789qwerty'
+      const tokenToReturn = 'invalid'
+      mockAxios(serviceUrl, challengeToReturn, tokenToReturn)
+
+      await serviceAuthentication(serviceUrl, 'does not matter', identity.did)(store.dispatch).catch(e => {
+        expect(e.message).toContain('Unsupported message type')
+      })
+    })
+
+    test
+      .each(['400', '401', '404', '500'])('should throw the axios error %s', async (errorCode: string) => {
+        // emulates the error thrown in https://github.com/axios/axios/blob/master/lib/core/settle.js#L18
+        const axiosError = `Request failed with status code ${errorCode}`
+        mockedAxios.post.mockImplementationOnce(() => {
+          return Promise.reject(new Error(axiosError))
+        })
+
+        await serviceAuthentication(serviceUrl, 'does not matter', identity.did)(store.dispatch).catch(e => {
+          expect(e.message).toEqual(axiosError)
+        })
+      })
+  })
+})
diff --git a/packages/rif-id-core/test/reducers/authentication.test.ts b/packages/rif-id-core/test/reducers/authentication.test.ts
new file mode 100644
index 0000000..f0f00a1
--- /dev/null
+++ b/packages/rif-id-core/test/reducers/authentication.test.ts
@@ -0,0 +1,179 @@
+import { AnyAction, configureStore, Store } from '@reduxjs/toolkit'
+import { did, did2, did3, did4 } from '../util'
+import authenticationReducer, { addServiceToken, AuthenticationState, removeServiceToken, selectServiceTokenByIdentity } from '../../src/reducers/authentication'
+
+describe('authentication reducer', () => {
+  const token = 'theToken'
+  const anotherToken = 'another'
+
+  describe('reducer', () => {
+    let store: Store<AuthenticationState, AnyAction>
+    let expectedState: AuthenticationState
+
+    beforeEach(() => {
+      store = configureStore({ reducer: authenticationReducer })
+    })
+
+    afterEach(() => {
+      expect(store.getState()).toEqual(expectedState)
+    })
+
+    test('no tokens', () => {
+      expectedState = {}
+    })
+
+    test('adds token for one identity with one service', () => {
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did2, token }))
+
+      expectedState = {}
+      expectedState[did] = {}
+      expectedState[did][did2] = token
+    })
+
+    test('adds token for one identity with two services', () => {
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did2, token }))
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did3, token: anotherToken }))
+
+      expectedState = {}
+      expectedState[did] = {}
+      expectedState[did][did2] = token
+      expectedState[did][did3] = anotherToken
+    })
+
+    test('adds token for two identities with one service each', async () => {
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did2, token }))
+      store.dispatch(addServiceToken({ identity: did3, serviceDid: did4, token: anotherToken }))
+
+      expectedState = {}
+      expectedState[did] = {}
+      expectedState[did][did2] = token
+      expectedState[did3] = {}
+      expectedState[did3][did4] = anotherToken
+    })
+
+    test('adds tokens for two identities with two services each', async () => {
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did2, token }))
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did4, token: anotherToken }))
+      store.dispatch(addServiceToken({ identity: did3, serviceDid: did2, token }))
+      store.dispatch(addServiceToken({ identity: did3, serviceDid: did4, token: anotherToken }))
+
+      expectedState = {}
+      expectedState[did] = {}
+      expectedState[did][did2] = token
+      expectedState[did][did4] = anotherToken
+      expectedState[did3] = {}
+      expectedState[did3][did2] = token
+      expectedState[did3][did4] = anotherToken
+    })
+
+    test('removes the unique token from one identity with one service', () => {
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did2, token }))
+      store.dispatch(removeServiceToken({ identity: did, serviceDid: did2 }))
+
+      expectedState = {}
+      expectedState[did] = {}
+    })
+
+    test('removes just one token from one identity with two services', () => {
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did2, token }))
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did3, token: anotherToken }))
+      store.dispatch(removeServiceToken({ identity: did, serviceDid: did2 }))
+
+      expectedState = {}
+      expectedState[did] = {}
+      expectedState[did][did3] = anotherToken
+    })
+
+    test('removes one token from two identities with one token each', () => {
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did2, token }))
+      store.dispatch(addServiceToken({ identity: did3, serviceDid: did4, token: anotherToken }))
+      store.dispatch(removeServiceToken({ identity: did3, serviceDid: did4 }))
+
+      expectedState = {}
+      expectedState[did] = {}
+      expectedState[did3] = {}
+      expectedState[did][did2] = token
+    })
+
+    test('removes one token for each identities when two identities with two tokens each', () => {
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did2, token }))
+      store.dispatch(addServiceToken({ identity: did, serviceDid: did4, token: anotherToken }))
+      store.dispatch(addServiceToken({ identity: did3, serviceDid: did2, token }))
+      store.dispatch(addServiceToken({ identity: did3, serviceDid: did4, token: anotherToken }))
+      store.dispatch(removeServiceToken({ identity: did, serviceDid: did2 }))
+      store.dispatch(removeServiceToken({ identity: did3, serviceDid: did4 }))
+
+      expectedState = {}
+      expectedState[did] = {}
+      expectedState[did][did4] = anotherToken
+      expectedState[did3] = {}
+      expectedState[did3][did2] = token
+    })
+  })
+
+  describe('action creators', () => {
+    test('add service token', () => {
+      const payload = { identity: did, serviceDid: did2, token }
+      expect(addServiceToken(payload)).toEqual({ payload, type: addServiceToken.type })
+    })
+
+    test('remove service token', () => {
+      const payload = { identity: did, serviceDid: did2 }
+      expect(removeServiceToken(payload)).toEqual({ payload, type: removeServiceToken.type })
+    })
+  })
+
+  describe('selectors', () => {
+    test('initial state', () => {
+      const initialState: AuthenticationState = {}
+
+      expect(selectServiceTokenByIdentity(initialState, did, did2)).toBeUndefined()
+    })
+
+    test('select existing value one service one token state', () => {
+      const state: AuthenticationState = {}
+      state[did] = {}
+      state[did][did2] = token
+
+      expect(selectServiceTokenByIdentity(state, did, did2)).toEqual(token)
+    })
+
+    test('select non existing value one service one token state', () => {
+      const state: AuthenticationState = {}
+      state[did] = {}
+      state[did][did2] = token
+
+      expect(selectServiceTokenByIdentity(state, did3, did4)).toBeUndefined()
+    })
+
+    test('select existing values two services two tokens each state', () => {
+      const state: AuthenticationState = {}
+      state[did] = {}
+      state[did4] = {}
+      state[did][did2] = token
+      state[did][did3] = anotherToken
+      state[did4][did2] = anotherToken
+      state[did4][did3] = token
+
+      expect(selectServiceTokenByIdentity(state, did, did2)).toEqual(token)
+      expect(selectServiceTokenByIdentity(state, did4, did3)).toEqual(token)
+      expect(selectServiceTokenByIdentity(state, did4, did2)).toEqual(anotherToken)
+      expect(selectServiceTokenByIdentity(state, did, did3)).toEqual(anotherToken)
+    })
+
+    test('select non existing values two services two tokens each state', () => {
+      const state: AuthenticationState = {}
+      state[did] = {}
+      state[did4] = {}
+      state[did][did2] = token
+      state[did][did3] = anotherToken
+      state[did4][did2] = anotherToken
+      state[did4][did3] = token
+
+      expect(selectServiceTokenByIdentity(state, did3, did4)).toBeUndefined()
+      expect(selectServiceTokenByIdentity(state, did2, did4)).toBeUndefined()
+      expect(selectServiceTokenByIdentity(state, did, did4)).toBeUndefined()
+      expect(selectServiceTokenByIdentity(state, did4, did)).toBeUndefined()
+    })
+  })
+})
diff --git a/packages/rif-id-core/test/util.ts b/packages/rif-id-core/test/util.ts
index f782e05..f410457 100644
--- a/packages/rif-id-core/test/util.ts
+++ b/packages/rif-id-core/test/util.ts
@@ -123,6 +123,7 @@ export const deleteDatabase = (agent: Daf.Agent, database: string) => agent.dbCo
 export const did = 'did:ethr:rsk:testnet:0xf3beac30c498d9e26865f34fcaa57dbb935b0d74'
 export const did2 = 'did:ethr:rsk:testnet:0xdcbe93e98e0dcebe677c39a84f5f212b85ba7ef0'
 export const did3 = 'did:ethr:rsk:testnet:0xbe935f08e079e7a7c898bcbde5dceba214fe6f2'
+export const did4 = 'did:ethr:rsk:testnet:0xc78b1d101938ea2f1e6dc5c16766627cf88b7a28'
 
 export const issueTestCredential = async (subject: string): Promise<Daf.Credential> => {
   const mnemonic = generateMnemonic(12)