diff --git a/.eslintrc.yml b/.eslintrc.yml
deleted file mode 100644
index 019c7c0..0000000
--- a/.eslintrc.yml
+++ /dev/null
@@ -1,3 +0,0 @@
-extends: cheminfo
-env:
-  browser: true
diff --git a/.gitignore b/.gitignore
index 739dc8c..f0f54cf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,9 @@ logs
 *.log
 npm-debug.log*
 
+# editors
+.idea
+
 # Runtime data
 pids
 *.pid
@@ -36,4 +39,5 @@ jspm_packages
 # Optional REPL history
 .node_repl_history
 
-test.js
+lib
+lib-es6
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..354f5c8
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,4 @@
+language: node_js
+node_js:
+  - 10
+  - 8
diff --git a/LICENSE b/LICENSE
index 4ea500b..1a08146 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2016 Cheminfo
+Copyright (c) 2018 cheminfo
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/package-lock.json b/package-lock.json
index 1d018a0..f77bc5c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,1570 +4,4538 @@
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-      "dev": true
+    "@babel/code-frame": {
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+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0.tgz",
+      "integrity": "sha512-OfC2uemaknXr87bdLUkWog7nYuliM9Ij5HUcajsVcMCpQrcLmtxRbVFTIqmcSkSeYRBFBRxs2FiUqFJDLdiebA==",
+      "dev": true,
+      "requires": {
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+      }
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-    "acorn-jsx": {
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-      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-3.0.1.tgz",
-      "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
+    "@babel/core": {
+      "version": "7.4.0",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.4.0.tgz",
+      "integrity": "sha512-Dzl7U0/T69DFOTwqz/FJdnOSWS57NpjNfCwMKHABr589Lg8uX1RrlBIJ7L5Dubt/xkLsx0xH5EBFzlBVes1ayA==",
       "dev": true,
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+        "@babel/code-frame": "^7.0.0",
+        "@babel/generator": "^7.4.0",
+        "@babel/helpers": "^7.4.0",
+        "@babel/parser": "^7.4.0",
+        "@babel/template": "^7.4.0",
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+        "convert-source-map": "^1.1.0",
+        "debug": "^4.1.0",
+        "json5": "^2.1.0",
+        "lodash": "^4.17.11",
+        "resolve": "^1.3.2",
+        "semver": "^5.4.1",
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 }
diff --git a/package.json b/package.json
index d3551b0..ab840f6 100644
--- a/package.json
+++ b/package.json
@@ -1,25 +1,48 @@
 {
   "name": "rest-on-couch-client",
   "version": "1.0.0",
-  "description": "A rest-on-couch client for node.js",
-  "main": "src/Roc.js",
-  "repository": "git@github.com:cheminfo/rest-on-couch-client.git",
-  "author": "Daniel Kostro <kostro.d@gmail.com>",
-  "license": "MIT",
+  "description": "A nodejs / browser client for rest-on-couch backend",
+  "main": "./lib/index.js",
+  "module": "./lib-es6/index.js",
+  "types": "./lib/index.d.ts",
+  "files": [
+    "lib",
+    "lib-es6"
+  ],
   "scripts": {
-    "eslint": "eslint src",
-    "test": "npm run eslint",
-    "eslint-fix": "eslint src --fix"
+    "clean": "rimraf lib lib-es6",
+    "prepare": "npm run tsc",
+    "test": "npm run test-only",
+    "test-only": "jest",
+    "test-coverage": "jest --coverage",
+    "tsc": "npm run clean && npm run tsc-es5 && npm run tsc-es6",
+    "tsc-es5": "tsc",
+    "tsc-es6": "tsc --project tsconfig.es6.json"
   },
-  "dependencies": {
-    "detect-node": "^2.0.3",
-    "superagent": "^3.8.3"
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/cheminfo/rest-on-couch-client.git"
+  },
+  "keywords": [],
+  "author": "Daniel Kostro",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/cheminfo/rest-on-couch-client/issues"
+  },
+  "homepage": "https://github.com/cheminfo/rest-on-couch-client#readme",
+  "jest": {
+    "preset": "ts-jest",
+    "testEnvironment": "node"
   },
   "devDependencies": {
-    "eslint": "^4.19.1",
-    "eslint-config-cheminfo": "^1.18.0",
-    "eslint-plugin-import": "^2.13.0",
-    "eslint-plugin-jest": "^21.18.0",
-    "eslint-plugin-no-only-tests": "^1.1.0"
+    "@types/jest": "^24.0.11",
+    "jest": "^24.5.0",
+    "rimraf": "^2.6.3",
+    "ts-jest": "^24.0.0",
+    "typescript": "^3.3.4000"
+  },
+  "dependencies": {
+    "axios": "^0.18.0",
+    "immer": "^2.1.4"
   }
 }
diff --git a/src/Error.ts b/src/Error.ts
new file mode 100644
index 0000000..97e2c5a
--- /dev/null
+++ b/src/Error.ts
@@ -0,0 +1,22 @@
+export class RocHTTPError extends Error {
+  public code: number;
+  constructor(code: number, message: string) {
+    if (typeof code !== 'number') {
+      throw new Error('ROCHTTPError code must be a number');
+    }
+    if (typeof message !== 'string') {
+      throw new Error('ROCHTTPError message must be a string');
+    }
+    super(message);
+    this.code = code;
+  }
+}
+
+export class RocClientError extends Error {
+  constructor(message: string) {
+    if (typeof message !== 'string') {
+      throw new Error('ROCClientError message must be a string');
+    }
+    super(message);
+  }
+}
diff --git a/src/base/BaseRoc.ts b/src/base/BaseRoc.ts
new file mode 100644
index 0000000..4d72c51
--- /dev/null
+++ b/src/base/BaseRoc.ts
@@ -0,0 +1,23 @@
+import { BaseRocReduceQuery } from '.';
+import {
+  ICouchUser,
+  INewDocument,
+  IQueryOptions,
+  IReduceQueryOptions
+} from '../types';
+import BaseRocDocument from './BaseRocDocument';
+import BaseRocQuery from './BaseRocQuery';
+
+export default abstract class BaseRoc {
+  public abstract getUser(): Promise<ICouchUser>;
+  public abstract getDocument(uuid: string): BaseRocDocument;
+  public abstract getQuery<KeyType = any, ValueType = any>(
+    viewName: string,
+    options?: IQueryOptions
+  ): BaseRocQuery<KeyType, ValueType>;
+  public abstract getReduceQuery<KeyType = any, ValueType = any>(
+    viewName: string,
+    options?: IReduceQueryOptions
+  ): BaseRocReduceQuery<KeyType, ValueType>;
+  public abstract create(newDocument: INewDocument): Promise<BaseRocDocument>;
+}
diff --git a/src/base/BaseRocDocument.ts b/src/base/BaseRocDocument.ts
new file mode 100644
index 0000000..c557bb7
--- /dev/null
+++ b/src/base/BaseRocDocument.ts
@@ -0,0 +1,74 @@
+import { RocClientError } from '../Error';
+import {
+  IAttachment,
+  IDocument,
+  IFetchAttachmentOptions,
+  INewAttachment
+} from '../types';
+
+export default abstract class BaseRocDocument {
+  public uuid: string;
+  public rev?: string;
+
+  protected value?: IDocument;
+  constructor(uuid: string) {
+    this.uuid = uuid;
+  }
+
+  public getAttachmentList(): IAttachment[] {
+    if (this.value === undefined) {
+      throw new RocClientError(
+        'You must fetch the document in order to get the attachment list'
+      );
+    }
+
+    // value must be defined after fetch
+    const doc = this.value!;
+    const attachments = doc._attachments || {};
+    const list = [];
+    for (const key in attachments) {
+      list.push(this.getAttachment(key));
+    }
+    return list;
+  }
+
+  public getAttachment(name: string): IAttachment {
+    if (this.value === undefined) {
+      throw new RocClientError(
+        'You must fetch the document in order to get an attachment'
+      );
+    }
+    const doc = this.value!;
+    const attachments = doc._attachments || {};
+    if (!attachments[name]) {
+      throw new RocClientError(`attachment ${name} does not exist`);
+    }
+    return {
+      ...attachments[name],
+      name,
+      url: `${this.getBaseUrl()}${doc._id}/${name}`
+    };
+  }
+
+  public abstract fetchAttachment(
+    name: string,
+    options?: IFetchAttachmentOptions
+  ): Promise<Buffer | string>;
+  public abstract fetch(rev?: string): Promise<IDocument>;
+  public abstract update(
+    content: object,
+    newAttachments?: INewAttachment[],
+    deleteAttachments?: string[]
+  ): Promise<IDocument>;
+  public abstract addGroups(groups: string | string[]): Promise<string[]>;
+
+  public getValue() {
+    return this.value;
+  }
+
+  public toJSON() {
+    return this.getValue();
+  }
+
+  protected abstract getBaseUrl(): string;
+}
diff --git a/src/base/BaseRocQuery.ts b/src/base/BaseRocQuery.ts
new file mode 100644
index 0000000..fe09508
--- /dev/null
+++ b/src/base/BaseRocQuery.ts
@@ -0,0 +1,19 @@
+import { IQueryOptions, IQueryResult, PromisedQueryResult } from '../types';
+
+export default abstract class BaseRocQuery<KeyType = any, ValueType = any> {
+  public readonly viewName: string;
+  protected baseOptions: IQueryOptions;
+  constructor(viewName: string, options: IQueryOptions) {
+    this.viewName = viewName;
+    this.baseOptions = options;
+  }
+
+  public then(
+    resolve: (value: Array<IQueryResult<KeyType, ValueType>>) => void
+  ) {
+    this.fetch().then(resolve);
+  }
+  public abstract fetch(
+    options?: IQueryOptions
+  ): PromisedQueryResult<KeyType, ValueType>;
+}
diff --git a/src/base/BaseRocReduceQuery.ts b/src/base/BaseRocReduceQuery.ts
new file mode 100644
index 0000000..d0b3be4
--- /dev/null
+++ b/src/base/BaseRocReduceQuery.ts
@@ -0,0 +1,25 @@
+import {
+  IReduceQueryOptions,
+  IReduceQueryResult,
+  PromisedReduceQueryResult
+} from '../types';
+
+export default abstract class BaseRocReduceQuery<
+  KeyType = any,
+  ValueType = any
+> {
+  public readonly viewName: string;
+  constructor(viewName: string) {
+    this.viewName = viewName;
+  }
+
+  public then(
+    resolve: (value: Array<IReduceQueryResult<KeyType, ValueType>>) => void
+  ) {
+    this.fetch().then(resolve);
+  }
+
+  public abstract async fetch(
+    options?: IReduceQueryOptions
+  ): PromisedReduceQueryResult<KeyType, ValueType>;
+}
diff --git a/src/base/index.ts b/src/base/index.ts
new file mode 100644
index 0000000..63019b8
--- /dev/null
+++ b/src/base/index.ts
@@ -0,0 +1,5 @@
+import BaseRoc from './BaseRoc';
+import BaseRocDocument from './BaseRocDocument';
+import BaseRocQuery from './BaseRocQuery';
+import BaseRocReduceQuery from './BaseRocReduceQuery';
+export { BaseRoc, BaseRocDocument, BaseRocQuery, BaseRocReduceQuery };
diff --git a/src/fake/__tests__/attachments.ts b/src/fake/__tests__/attachments.ts
new file mode 100644
index 0000000..ab1ebf7
--- /dev/null
+++ b/src/fake/__tests__/attachments.ts
@@ -0,0 +1,95 @@
+import { FakeRoc } from '..';
+import { INewAttachment } from '../../types';
+import { getTestData } from '../fixtures/data';
+
+import { RocClientError } from '../../Error';
+
+describe('fake attachments', () => {
+  it('add attachment', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const doc = roc.getDocument('uuid1');
+    await doc.fetch();
+    const attachment: INewAttachment = {
+      content_type: 'text/plain',
+      name: 'attachment2',
+      data: Buffer.from('test', 'utf-8')
+    };
+    await doc.update(doc.getValue().$content, [attachment]);
+    expect(doc.getValue()._attachments.attachment2).toBeDefined();
+
+    const attachmentContent = await doc.fetchAttachment('attachment2');
+    expect(attachmentContent).toEqual('test');
+  });
+
+  it('delete attachment', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const doc = roc.getDocument('uuid1');
+    await doc.fetch();
+    await doc.update(doc.getValue().$content, null, ['attachment1']);
+    expect(doc.getValue()._attachments).toEqual({});
+    expect(doc.fetchAttachment('attachment1')).rejects.toThrow(
+      /does not exist/
+    );
+  });
+
+  it('get list of attachments', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const doc = roc.getDocument('uuid1');
+    await doc.fetch();
+    const list = doc.getAttachmentList();
+    expect(list).toEqual([
+      {
+        digest: 'digest',
+        content_type: 'text/plain',
+        revpos: 1,
+        length: 4,
+        stub: true,
+        name: 'attachment1',
+        url: 'https://mydb.cheminfo.org/db/eln/entry/uuid1/attachment1'
+      }
+    ]);
+  });
+
+  it('get an attachment', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const doc = roc.getDocument('uuid1');
+    await doc.fetch();
+    const attachment = doc.getAttachment('attachment1');
+    expect(attachment).toEqual({
+      digest: 'digest',
+      content_type: 'text/plain',
+      revpos: 1,
+      length: 4,
+      stub: true,
+      name: 'attachment1',
+      url: 'https://mydb.cheminfo.org/db/eln/entry/uuid1/attachment1'
+    });
+  });
+
+  it('get a non-existing attachment should throw', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const doc = roc.getDocument('uuid1');
+    await doc.fetch();
+    function getNonExisting() {
+      doc.getAttachment('non-existing');
+    }
+    expect(getNonExisting).toThrowError(RocClientError);
+    expect(getNonExisting).toThrowError(/does not exist/);
+  });
+
+  it('get an attachment before fetch should throw', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const doc = roc.getDocument('uuid1');
+    function getAttachment() {
+      doc.getAttachment('attachment1');
+    }
+    expect(getAttachment).toThrowError(RocClientError);
+    expect(getAttachment).toThrowError(/must fetch/);
+  });
+});
diff --git a/src/fake/__tests__/document.ts b/src/fake/__tests__/document.ts
new file mode 100644
index 0000000..44e32e7
--- /dev/null
+++ b/src/fake/__tests__/document.ts
@@ -0,0 +1,57 @@
+import { FakeRoc } from '..';
+import { INewDocument } from '../../types';
+import { getTestData } from '../fixtures/data';
+
+describe('fake document', () => {
+  it('create document', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const newDoc: INewDocument = {
+      $kind: 'kind',
+      $id: 'newDocument',
+      $content: {
+        test: 42
+      },
+      $owners: ['group1', 'group2', 'group1']
+    };
+    const document = await roc.create(newDoc);
+    expect(document.getValue().$content).toEqual({ test: 42 });
+    expect(document.getValue().$owners).toEqual([
+      'test@test.com',
+      'group1',
+      'group2'
+    ]);
+    expect(document.getValue().$kind).toEqual('kind');
+    expect(document.getValue()._id).toHaveLength(32);
+    expect(document.getValue()._rev.substr(0, 1)).toEqual('1');
+  });
+
+  it('get document', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const document = roc.getDocument('uuid1');
+    const doc = await document.fetch(); // Fetch latest revision if it's out of sync
+    expect(doc).toEqual(data.documents.uuid1[0]);
+    //   await document.forceFetch(); // Fetch latest revision even if revision is up to date
+    const val = document.getValue(); // document json
+    expect(val).toEqual(data.documents.uuid1[0]);
+  });
+
+  it('document update content', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const document = roc.getDocument('uuid1');
+    const newDocument = await document.update({
+      test: 43
+    });
+    expect(newDocument._rev.substr(0, 1)).toEqual('2');
+  });
+
+  it('document toJSON', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const doc = roc.getDocument('uuid1');
+    const val = JSON.parse(JSON.stringify(await doc.fetch()));
+    expect(val).toEqual(data.documents.uuid1[0]);
+  });
+});
diff --git a/src/fake/__tests__/groups.ts b/src/fake/__tests__/groups.ts
new file mode 100644
index 0000000..ec4c1fb
--- /dev/null
+++ b/src/fake/__tests__/groups.ts
@@ -0,0 +1,26 @@
+import { FakeRoc } from '../..';
+import { getTestData } from '../fixtures/data';
+
+describe('fake groups', () => {
+  it('add group', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const doc = roc.getDocument('uuid1');
+    const groups = await doc.addGroups('group1');
+    expect(groups).toEqual(['test@test.com', 'group1']);
+    expect(doc.getValue().$owners).toEqual(['test@test.com', 'group1']);
+  });
+
+  it('add groups', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const doc = roc.getDocument('uuid1');
+    const groups = await doc.addGroups(['group1', 'group2', 'group1']);
+    expect(groups).toEqual(['test@test.com', 'group1', 'group2']);
+    expect(doc.getValue().$owners).toEqual([
+      'test@test.com',
+      'group1',
+      'group2'
+    ]);
+  });
+});
diff --git a/src/fake/__tests__/query.ts b/src/fake/__tests__/query.ts
new file mode 100644
index 0000000..c6a2daa
--- /dev/null
+++ b/src/fake/__tests__/query.ts
@@ -0,0 +1,32 @@
+import { FakeRoc } from '../..';
+import { RocHTTPError } from '../../Error';
+import { getTestData } from '../fixtures/data';
+
+describe('fake queries', () => {
+  it('fetch', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const query = roc.getQuery('documentByOwner');
+    const queryResult = await query.fetch();
+    expect(queryResult).toHaveLength(11);
+  });
+
+  it('fetch view not found', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const query = roc.getQuery('inexistant');
+    async function fetchQuery() {
+      await query.fetch();
+    }
+    expect(fetchQuery()).rejects.toThrowError(RocHTTPError);
+    expect(fetchQuery()).rejects.toThrowError(/not a view with owner/);
+  });
+
+  it('getQuery can be awaited', async () => {
+    const data = getTestData();
+    const roc = new FakeRoc(data);
+    const query = roc.getQuery('documentByOwner');
+    const queryResult = await query;
+    expect(queryResult).toHaveLength(11);
+  });
+});
diff --git a/src/fake/__tests__/user.ts b/src/fake/__tests__/user.ts
new file mode 100644
index 0000000..41633ea
--- /dev/null
+++ b/src/fake/__tests__/user.ts
@@ -0,0 +1,14 @@
+import { FakeRoc } from '../..';
+import { getTestData } from '../fixtures/data';
+
+it('fake roc get user', async () => {
+  const data = getTestData();
+  const roc = new FakeRoc(data);
+  const user = await roc.getUser();
+  expect(user).toEqual({
+    username: 'test@test.com',
+    provider: 'test',
+    authenticated: true,
+    admin: false
+  });
+});
diff --git a/src/fake/fixtures/data.ts b/src/fake/fixtures/data.ts
new file mode 100644
index 0000000..7f354c6
--- /dev/null
+++ b/src/fake/fixtures/data.ts
@@ -0,0 +1,41 @@
+import { IFakeRocData } from '..';
+
+import sampleToc from './sampleToc';
+
+export function getTestData(): IFakeRocData {
+  return {
+    documents: {
+      uuid1: [
+        {
+          _id: 'uuid1',
+          _rev: '1-db302401f0df79e06b79f10f79c1f0f9',
+          $id: 'uuid1',
+          $type: 'entry',
+          $content: {},
+          $modificationDate: 0,
+          $creationDate: 0,
+          $lastModification: 'test@test.com',
+          $kind: 'kind',
+          $owners: ['test@test.com'],
+          _attachments: {
+            attachment1: {
+              digest: 'digest',
+              content_type: 'text/plain',
+              revpos: 1,
+              length: 4,
+              stub: true
+            }
+          }
+        }
+      ]
+    },
+    attachments: {
+      uuid1: {
+        attachment1: 'dGVzdA=='
+      }
+    },
+    query: {
+      documentByOwner: sampleToc
+    }
+  };
+}
diff --git a/src/fake/fixtures/sampleToc.ts b/src/fake/fixtures/sampleToc.ts
new file mode 100644
index 0000000..00ce052
--- /dev/null
+++ b/src/fake/fixtures/sampleToc.ts
@@ -0,0 +1,1699 @@
+import { IQueryResult } from '../../types';
+
+const data: IQueryResult[] = [
+  {
+    id: 'aaa5f97c7cde94741de2938b105a97c4',
+    key: ['anonymousRead', '10-90-2 '],
+    value: {
+      hasNmr: 1,
+      has1d: true,
+      has2d: false,
+      nb1d: 1,
+      nb2d: 0,
+      nb1h: 1,
+      nb13c: 0,
+      modificationDate: 1479735881852,
+      b64ShortId: 'qqX5fHze',
+      names: [],
+      reference: '10-90-2 '
+    },
+    doc: {
+      _id: 'aaa5f97c7cde94741de2938b105a97c4',
+      _rev: '2-7f02ab68d0430249abf23aee8fa02ef9',
+      $type: 'entry',
+      $id: ['10-90-2', null],
+      $kind: 'sample',
+      $owners: ['sample@cheminfo.org', 'anonymousRead', 'sampleRW'],
+      $content: {
+        general: {},
+        identifier: { cas: [{ value: '10-90-2' }] },
+        physical: {},
+        spectra: {
+          nmr: [
+            {
+              dimension: 1,
+              nucleus: ['1H'],
+              isFid: false,
+              isFt: true,
+              title: '10-90-2 -',
+              solvent: 'CDCl3',
+              pulse: 'zg',
+              experiment: '1d',
+              temperature: 303,
+              frequency: 400.112,
+              type: 'NMR SPECTRUM',
+              date: '2004-02-03T12:08:21.000Z',
+              range: [
+                {
+                  from: 7.278150727338177,
+                  to: 7.293204961898503,
+                  integral: 0.5608078455161883,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 's',
+                      kind: '',
+                      remark: '',
+                      delta: 7.28567784461834
+                    }
+                  ]
+                },
+                {
+                  from: 3.6774016163063687,
+                  to: 3.743792156722481,
+                  integral: 35.49955275645598,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 'quint',
+                      kind: '',
+                      remark: '',
+                      j: [
+                        { coupling: 4.576492846887959, multiplicity: 'quint' }
+                      ],
+                      delta: 3.7105968865144248
+                    }
+                  ]
+                },
+                {
+                  from: 2.3633781218254977,
+                  to: 2.438972804082467,
+                  integral: 34.968410246154875,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 'quint',
+                      kind: '',
+                      remark: '',
+                      j: [
+                        { coupling: 4.267367262143466, multiplicity: 'quint' }
+                      ],
+                      delta: 2.4011754629539825
+                    }
+                  ]
+                },
+                {
+                  from: 2.265052792310393,
+                  to: 2.306503372560658,
+                  integral: 5.665557412623038,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 's',
+                      kind: '',
+                      remark: '',
+                      delta: 2.2857780824355256
+                    }
+                  ]
+                },
+                {
+                  from: 2.2550061188419503,
+                  to: 2.312812274938926,
+                  integral: 22.315572729348943,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 'd',
+                      kind: '',
+                      remark: '',
+                      j: [{ coupling: 8.015482114918314, multiplicity: 'd' }],
+                      delta: 2.283909196890438
+                    }
+                  ]
+                }
+              ],
+              jcamp: { filename: 'spectra/nmr/168.jdx' }
+            }
+          ]
+        },
+        misc: { externalID: 421 }
+      },
+      $lastModification: 'sample@cheminfo.org',
+      $modificationDate: 1479735881852,
+      $creationDate: 1479735881813,
+      _attachments: {
+        'spectra/nmr/168.jdx': {
+          content_type: 'chemical/x-jcamp-dx',
+          revpos: 1,
+          digest: 'md5-4OLZEJfiE3GN7NRCRC3HeA==',
+          length: 187769,
+          stub: true
+        }
+      }
+    }
+  },
+  {
+    id: 'aaa5f97c7cde94741de2938b106656e6',
+    key: ['anonymousRead', '100-00-5 '],
+    value: {
+      mf: 'C6H4NO2Cl',
+      mw: 157.554629,
+      ocl: {
+        value: 'deVDaNFPbNf^RYWZf`@f@@',
+        coordinates: '!Bb@JH_x@b@JH@ox@b@JH_x@'
+      },
+      nb1d: 0,
+      nb2d: 0,
+      nb1h: 0,
+      nb13c: 0,
+      modificationDate: 1479736117430,
+      b64ShortId: 'qqX5fHze',
+      names: [],
+      reference: '100-00-5 '
+    },
+    doc: {
+      _id: 'aaa5f97c7cde94741de2938b106656e6',
+      _rev: '4-88a5afbcff4f8dbe2d5d68d7468b8f38',
+      $type: 'entry',
+      $id: ['100-00-5', null],
+      $kind: 'sample',
+      $owners: ['sample@cheminfo.org', 'anonymousRead', 'sampleRW'],
+      $content: {
+        general: {
+          mf: 'C6H4NO2Cl',
+          mw: 157.554629,
+          em: 156.9930560563,
+          molfile:
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+      $owners: ['sample@cheminfo.org', 'anonymousRead', 'sampleRW'],
+      $content: {
+        general: {
+          mf: 'C8H8',
+          mw: 104.149413,
+          em: 104.0626002566,
+          molfile:
+            'C(=C)C1(=CC=CC=C1)\n\n\n  8  8  0  0  0  0  0  0  0  0999 V2000\n    0.8660    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.7320   -0.5000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.0000   -0.5000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   -0.8660    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.0000   -1.4999    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   -0.8660   -1.9999    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   -1.7320   -0.4999    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   -1.7320   -1.4999    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  2  1  2  0  0  0  0\n  3  1  1  0  0  0  0\n  4  3  2  0  0  0  0\n  5  3  1  0  0  0  0\n  6  5  2  0  0  0  0\n  7  4  1  0  0  0  0\n  8  6  1  0  0  0  0\n  8  7  2  0  0  0  0\nM  END\n\n\n',
+          ocl: {
+            value: 'daD@@DjUZxHD@@',
+            coordinates: '!Bg~HK_|bOvH_[_}bOp',
+            index: [
+              1090523136,
+              8192,
+              0,
+              256,
+              -2147483648,
+              0,
+              262144,
+              0,
+              0,
+              0,
+              0,
+              0,
+              0,
+              0,
+              0,
+              0
+            ]
+          }
+        },
+        identifier: { cas: [{ value: '100-42-5' }] },
+        physical: {},
+        spectra: {},
+        misc: { externalID: 264 }
+      },
+      $lastModification: 'sample@cheminfo.org',
+      $modificationDate: 1479735870307,
+      $creationDate: 1479735870295,
+      _attachments: {}
+    }
+  },
+  {
+    id: 'aaa5f97c7cde94741de2938b105e5682',
+    key: ['anonymousRead', '100-46-9 '],
+    value: {
+      mf: 'C7H9N',
+      mw: 107.153321,
+      ocl: { value: 'daF@@@RVU[j@@@@', coordinates: '!BbOrH_ybOrHXa}bOp' },
+      hasNmr: 1,
+      has1d: true,
+      has2d: false,
+      nb1d: 1,
+      nb2d: 0,
+      nb1h: 1,
+      nb13c: 0,
+      modificationDate: 1479735965108,
+      b64ShortId: 'qqX5fHze',
+      names: [],
+      reference: '100-46-9 '
+    },
+    doc: {
+      _id: 'aaa5f97c7cde94741de2938b105e5682',
+      _rev: '4-73cdd22169365b5bffe296831fd17946',
+      $type: 'entry',
+      $id: ['100-46-9', null],
+      $kind: 'sample',
+      $owners: ['sample@cheminfo.org', 'anonymousRead', 'sampleRW'],
+      $content: {
+        general: {
+          mf: 'C7H9N',
+          mw: 107.153321,
+          em: 107.0734992935,
+          molfile:
+            'NCC1(=CC=CC=C1)\n\n\n  8  8  0  0  0  0  0  0  0  0999 V2000\n    1.7320   -0.5000    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    0.0000   -0.5000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.8660    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   -0.8660    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.0000   -1.4999    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   -0.8660   -1.9999    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   -1.7320   -0.4999    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n   -1.7320   -1.4999    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  2  3  1  0  0  0  0\n  3  1  1  0  0  0  0\n  4  2  2  0  0  0  0\n  5  2  1  0  0  0  0\n  6  5  2  0  0  0  0\n  7  4  1  0  0  0  0\n  8  6  1  0  0  0  0\n  7  8  2  0  0  0  0\nM  END\n\n\n',
+          ocl: {
+            value: 'daF@@@RVU[j@@@@',
+            coordinates: '!BbOrH_ybOrHXa}bOp',
+            index: [
+              -1056665600,
+              268443648,
+              268435456,
+              16777216,
+              -2147483648,
+              0,
+              0,
+              0,
+              0,
+              0,
+              0,
+              0,
+              0,
+              0,
+              0,
+              1048704
+            ]
+          }
+        },
+        identifier: { cas: [{ value: '100-46-9' }] },
+        physical: {},
+        spectra: {
+          nmr: [
+            {
+              dimension: 1,
+              nucleus: ['1H'],
+              isFid: false,
+              isFt: true,
+              title: '100-46-9 -',
+              solvent: 'CDCl3',
+              pulse: 'zg',
+              experiment: '1d',
+              temperature: 303,
+              frequency: 400.112,
+              type: 'NMR SPECTRUM',
+              date: '2005-07-20T13:32:38.000Z',
+              range: [
+                {
+                  from: 7.2165425385410416,
+                  to: 7.386059811809865,
+                  integral: 4.728837136948755,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 'm',
+                      kind: '',
+                      remark: '',
+                      delta: 7.332282453577131
+                    }
+                  ]
+                },
+                {
+                  from: 3.835711482966662,
+                  to: 3.8682445446433835,
+                  integral: 2.173307795111299,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 's',
+                      kind: '',
+                      remark: '',
+                      delta: 3.851978013805023
+                    }
+                  ]
+                },
+                {
+                  from: 1.3724408812384348,
+                  to: 1.4727473898844372,
+                  integral: 2.0978550679399453,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 's',
+                      kind: '',
+                      remark: '',
+                      delta: 1.422594135561436
+                    }
+                  ]
+                }
+              ],
+              jcamp: { filename: 'spectra/nmr/1497.jdx' }
+            }
+          ]
+        },
+        misc: { externalID: 7234 }
+      },
+      $lastModification: 'sample@cheminfo.org',
+      $modificationDate: 1479735965108,
+      $creationDate: 1479735965069,
+      _attachments: {
+        'spectra/nmr/1497.jdx': {
+          content_type: 'chemical/x-jcamp-dx',
+          revpos: 1,
+          digest: 'md5-HrF9KwlW2a7yujR7swGqVQ==',
+          length: 178814,
+          stub: true
+        }
+      }
+    }
+  },
+  {
+    id: 'aaa5f97c7cde94741de2938b105bebdc',
+    key: ['anonymousRead', '100-61-8 '],
+    value: {
+      mf: 'C7H9N',
+      mw: 107.153321,
+      ocl: { value: 'daF@@@Rfu[j@@@@', coordinates: '!BmvH[\\Bg~w[_}g|' },
+      keyword: [],
+      hasNmr: 1,
+      hasIR: 1,
+      hasMass: 0,
+      has1d: true,
+      has2d: false,
+      nb1d: 1,
+      nb2d: 0,
+      nb1h: 1,
+      nb13c: 0,
+      modificationDate: 1510262471670,
+      b64ShortId: 'qqX5fHze',
+      names: [],
+      reference: '100-61-8 '
+    },
+    doc: {
+      _id: 'aaa5f97c7cde94741de2938b105bebdc',
+      _rev: '6-1fdf84232b6c4c1812478f90573e2d1d',
+      $type: 'entry',
+      $id: ['100-61-8', null],
+      $kind: 'sample',
+      $owners: ['sample@cheminfo.org', 'anonymousRead', 'sampleRW'],
+      $content: {
+        general: {
+          mf: 'C7H9N',
+          mw: 107.153321,
+          em: 107.0734992935,
+          molfile:
+            'N(C1(=CC=CC=C1))C\n\n\n  8  8  0  0  0  0  0  0  0  0999 V2000\n    0.8660    0.0000    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0\n    1.7320   -0.5000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    0.0000   -0.5000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    1.7320   -1.5000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.5980    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.4641   -0.5000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    2.5980   -2.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n    3.4641   -1.5000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0\n  2  1  1  0  0  0  0\n  3  1  1  0  0  0  0\n  4  2  2  0  0  0  0\n  5  2  1  0  0  0  0\n  6  5  2  0  0  0  0\n  7  4  1  0  0  0  0\n  8  6  1  0  0  0  0\n  8  7  2  0  0  0  0\nM  END\n\n\n',
+          ocl: {
+            value: 'daF@@@Rfu[j@@@@',
+            coordinates: '!BmvH[\\Bg~w[_}g|',
+            index: [
+              151425032,
+              37814272,
+              128,
+              0,
+              -2147483648,
+              0,
+              0,
+              134217728,
+              0,
+              0,
+              0,
+              16384,
+              0,
+              262144,
+              0,
+              524352
+            ]
+          },
+          description: '',
+          title: '',
+          name: [],
+          keyword: [],
+          sequence: '',
+          kind: ''
+        },
+        identifier: { cas: [{ value: '100-61-8' }] },
+        physical: {},
+        spectra: {
+          nmr: [
+            {
+              dimension: 1,
+              nucleus: ['1H'],
+              isFid: false,
+              isFt: true,
+              title: '100-61-8 -',
+              solvent: 'CDCl3',
+              pulse: 'zg',
+              experiment: '1d',
+              temperature: 296.3,
+              frequency: 400.1321303162,
+              type: 'NMR SPECTRUM',
+              date: '2004-03-15T10:11:23.000Z',
+              range: [
+                {
+                  from: 7.241328871419086,
+                  to: 7.30153227384648,
+                  integral: 1.7268915905388775,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 't',
+                      kind: '',
+                      remark: '',
+                      j: [{ coupling: 7.886768257294534, multiplicity: 't' }],
+                      delta: 7.271430572632783
+                    }
+                  ]
+                },
+                {
+                  from: 6.755698138979067,
+                  to: 6.831863014505465,
+                  integral: 0.8899409427170921,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 't',
+                      kind: '',
+                      remark: '',
+                      j: [{ coupling: 7.339686566027922, multiplicity: 't' }],
+                      delta: 6.793780576742266
+                    }
+                  ]
+                },
+                {
+                  from: 6.667640751911187,
+                  to: 6.713568752185619,
+                  integral: 1.7651061978292772,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 'd',
+                      kind: '',
+                      remark: '',
+                      j: [{ coupling: 8.100600767097603, multiplicity: 'd' }],
+                      delta: 6.6906047520484035
+                    }
+                  ]
+                },
+                {
+                  from: 3.6607108067032232,
+                  to: 3.8682225501879994,
+                  integral: 1.0309795404751116,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 'br s',
+                      kind: '',
+                      remark: '',
+                      delta: 3.7644666784456113
+                    }
+                  ]
+                },
+                {
+                  from: 2.8775273640447687,
+                  to: 2.906590142864133,
+                  integral: 3.1712746132789866,
+                  signal: [
+                    {
+                      nbAtoms: 0,
+                      diaID: [],
+                      multiplicity: 's',
+                      kind: '',
+                      remark: '',
+                      delta: 2.892058753454451
+                    }
+                  ]
+                }
+              ],
+              jcamp: { filename: 'spectra/nmr/258.jdx' }
+            }
+          ],
+          chromatogram: [],
+          differentialScanningCalorimetry: [],
+          ir: [{ jcamp: { filename: 'spectra/ir/ir.jdx' } }],
+          mass: [],
+          raman: [],
+          thermogravimetricAnalysis: [],
+          xray: []
+        },
+        misc: { externalID: 596 },
+        image: []
+      },
+      $lastModification: 'admin@cheminfo.org',
+      $modificationDate: 1510262471670,
+      $creationDate: 1479735914540,
+      _attachments: {
+        'spectra/nmr/258.jdx': {
+          content_type: 'chemical/x-jcamp-dx',
+          revpos: 1,
+          digest: 'md5-DxD4TzulqKPkrCmhfFCF3Q==',
+          length: 182046,
+          stub: true
+        },
+        'spectra/ir/ir.jdx': {
+          content_type: 'chemical/x-jcamp-dx',
+          revpos: 4,
+          digest: 'md5-b01XCJdRAJr4qDMvsuWv9Q==',
+          length: 8399,
+          stub: true
+        }
+      }
+    }
+  }
+];
+
+export default data;
diff --git a/src/fake/index.ts b/src/fake/index.ts
new file mode 100644
index 0000000..3370f5f
--- /dev/null
+++ b/src/fake/index.ts
@@ -0,0 +1,297 @@
+import { randomBytes } from 'crypto';
+
+import { BaseRocReduceQuery } from '../base';
+import BaseRoc from '../base/BaseRoc';
+import BaseRocDocument from '../base/BaseRocDocument';
+import BaseRocQuery from '../base/BaseRocQuery';
+import { RocClientError, RocHTTPError } from '../Error';
+import {
+  ICouchAttachments,
+  IDocument,
+  IFetchAttachmentOptions,
+  INewAttachment,
+  INewDocument,
+  INewRevisionMeta,
+  IQueryOptions,
+  IQueryResult,
+  IReduceQueryOptions,
+  IReduceQueryResult
+} from '../types';
+
+export interface IFakeRocData {
+  documents: {
+    [key: string]: IDocument[];
+  };
+  attachments: {
+    // document uuid
+    [key: string]: {
+      // attachment name
+      [key: string]: string; // attachment data base64
+    };
+  };
+  query: {
+    [key: string]: IQueryResult[];
+  };
+  reducer?: {
+    [key: string]: IReduceQueryResult[];
+  };
+}
+
+export class FakeQuery<A, B> extends BaseRocQuery {
+  protected roc: FakeRoc;
+  constructor(roc: FakeRoc, viewName: string, baseOptions: IQueryOptions) {
+    super(viewName, baseOptions);
+    this.roc = roc;
+  }
+
+  public async fetch(
+    option: IQueryOptions = {}
+  ): Promise<Array<IQueryResult<A, B>>> {
+    if (!this.roc.data.query[this.viewName]) {
+      throw new RocHTTPError(401, `${this.viewName} is not a view with owner`);
+    }
+    return this.roc.data.query[this.viewName];
+  }
+}
+
+export class FakeReduceQuery<A, B> extends BaseRocReduceQuery {
+  protected roc: FakeRoc;
+  constructor(roc: FakeRoc, viewName: string) {
+    super(viewName);
+    this.roc = roc;
+  }
+
+  public async fetch(
+    option: IReduceQueryOptions = {}
+  ): Promise<Array<IReduceQueryResult<A, B>>> {
+    throw new Error('not implemented');
+  }
+}
+
+export class FakeDocument extends BaseRocDocument {
+  protected roc: FakeRoc;
+  constructor(roc: FakeRoc, data: string | IDocument) {
+    if (typeof data === 'string') {
+      super(data);
+    } else {
+      super(data._id);
+      this.value = data;
+    }
+    this.roc = roc;
+  }
+
+  public async fetchAttachment(
+    name: string,
+    options: IFetchAttachmentOptions = {
+      type: 'text'
+    }
+  ) {
+    const attachments = this.roc.data.attachments[this.uuid];
+    if (attachments) {
+      const data = attachments[name];
+      if (data) {
+        const buffer = Buffer.from(data, 'base64');
+        if (options.type === 'buffer') {
+          return buffer;
+        } else if (options.type === 'text') {
+          return buffer.toString();
+        } else {
+          throw new RocClientError('unsupported fetch attachment options');
+        }
+      }
+    }
+    throw new RocClientError('attachment does not exist');
+  }
+  public async fetch(rev?: string) {
+    const revs = this.roc.data.documents[this.uuid];
+    if (!revs) {
+      throw new RocHTTPError(404, 'document not found');
+    }
+    const doc: IDocument | undefined = rev
+      ? revs.find((d) => d._rev === rev)
+      : revs[revs.length - 1];
+
+    if (doc === undefined) {
+      throw new RocHTTPError(404, 'revision does not exist ');
+    }
+    this.value = doc;
+    return doc;
+  }
+
+  public async update(
+    content: object,
+    newAttachments?: INewAttachment[],
+    deleteAttachments?: string[]
+  ) {
+    if (this.value === undefined) {
+      await this.fetch();
+    }
+
+    this.checkConflict();
+    // value must be defined after fetch
+    const doc = this.value!;
+
+    if (deleteAttachments) {
+      for (const attachment of deleteAttachments) {
+        const att = this.roc.data.documents[this.uuid][0]._attachments;
+        if (!att || !att[attachment]) {
+          throw new RocClientError('attachment to delete does not exist');
+        }
+        delete att[attachment];
+        delete this.roc.data.attachments[this.uuid][attachment];
+      }
+    }
+
+    const newMeta = getNewRevisionMeta(doc._rev);
+
+    const attachments = doc._attachments || {};
+    const updatedAttachments: ICouchAttachments = Object.assign(
+      {},
+      attachments
+    );
+    if (newAttachments) {
+      for (const attachment of newAttachments) {
+        const prevAttachment = attachments[attachment.name];
+        let revpos = 1;
+        if (prevAttachment) {
+          revpos = prevAttachment.revpos! + 1;
+        }
+        this.saveAttachment(this.uuid, attachment.name, attachment.data);
+        if (
+          Buffer.isBuffer(attachment.data) ||
+          typeof attachment.data === 'string'
+        ) {
+          updatedAttachments[attachment.name] = {
+            content_type: attachment.content_type,
+            length: attachment.data.length,
+            revpos,
+            digest: Math.random()
+              .toString(36)
+              .substr(2),
+            stub: true
+          };
+        }
+      }
+    }
+
+    const newDocument: IDocument = {
+      ...doc,
+      $content: content,
+      ...newMeta,
+      _attachments: updatedAttachments
+    };
+
+    this.roc.data.documents[this.uuid].push(newDocument);
+
+    this.value = newDocument;
+    return newDocument;
+  }
+
+  public async addGroups(groups: string | string[]) {
+    if (this.value === undefined) {
+      await this.fetch();
+    }
+
+    this.checkConflict();
+    const doc = this.value!;
+    const owners = new Set(doc.$owners);
+    if (typeof groups === 'string') {
+      owners.add(groups);
+    } else {
+      groups.forEach((group) => owners.add(group));
+    }
+    doc.$owners = Array.from(owners);
+    return doc.$owners.slice();
+  }
+
+  protected getBaseUrl() {
+    return `https://${this.roc.fakeHost}/db/${this.roc.fakeDatabase}/entry/`;
+  }
+
+  private saveAttachment(uuid: string, name: string, data: Buffer | string) {
+    const attachments = this.roc.data.attachments[uuid] || {};
+    if (Buffer.isBuffer(data)) {
+      attachments[name] = data.toString('base64');
+    } else {
+      attachments[name] = data;
+    }
+  }
+
+  private checkConflict() {
+    return;
+  }
+}
+
+function getNewRevisionMeta(oldRev: string): INewRevisionMeta {
+  const revMatch = oldRev.match(/^(\d+)/);
+  let oldInc: string;
+  if (!revMatch) {
+    oldInc = '0';
+  } else {
+    oldInc = revMatch[0];
+  }
+  const newInc = +oldInc + 1;
+  const rev = randomBytes(16).toString('hex');
+  return {
+    _rev: `${newInc}-${rev}`,
+    $modificationDate: Date.now()
+  };
+}
+
+export class FakeRoc extends BaseRoc {
+  public data: IFakeRocData;
+  public fakeDatabase: string;
+  public fakeHost: string;
+
+  constructor(rocData: IFakeRocData) {
+    super();
+    this.data = rocData;
+    this.fakeDatabase = 'eln';
+    this.fakeHost = 'mydb.cheminfo.org';
+  }
+
+  public getDocument(uuid: string) {
+    return new FakeDocument(this, uuid);
+  }
+
+  public getQuery<KeyType = any, ValueType = any>(
+    viewName: string,
+    options: IQueryOptions = {}
+  ) {
+    return new FakeQuery<KeyType, ValueType>(this, viewName, options);
+  }
+
+  public getReduceQuery<KeyType = any, ValueType = any>(viewName: string) {
+    return new FakeReduceQuery<KeyType, ValueType>(this, viewName);
+  }
+
+  public async create(newDocument: INewDocument) {
+    const uuid = randomBytes(16).toString('hex');
+    const rev = `1-${randomBytes(16).toString('hex')}`;
+    const document: IDocument = {
+      ...newDocument,
+      _id: uuid,
+      _rev: rev,
+      $type: 'entry',
+      $lastModification: 'test@test.com',
+      $modificationDate: Date.now(),
+      $creationDate: Date.now(),
+      $owners: ['test@test.com', ...new Set(newDocument.$owners)],
+      _attachments: {}
+    };
+    if (!this.data.documents[uuid]) {
+      this.data.documents[uuid] = [];
+    }
+    this.data.documents[uuid].push(document);
+    return new FakeDocument(this, document);
+  }
+
+  public async getUser() {
+    return {
+      username: 'test@test.com',
+      provider: 'test',
+      authenticated: true,
+      admin: false
+    };
+  }
+}
diff --git a/src/index.ts b/src/index.ts
new file mode 100644
index 0000000..7ebfb2e
--- /dev/null
+++ b/src/index.ts
@@ -0,0 +1,4 @@
+export * from './fake';
+export * from './real';
+export * from './base';
+export * from './types';
diff --git a/src/Roc.js b/src/old.js
similarity index 100%
rename from src/Roc.js
rename to src/old.js
diff --git a/src/real/Query.ts b/src/real/Query.ts
new file mode 100644
index 0000000..3120309
--- /dev/null
+++ b/src/real/Query.ts
@@ -0,0 +1,25 @@
+import { AxiosInstance } from 'axios';
+import BaseRocQuery from '../base/BaseRocQuery';
+import { IQueryOptions, PromisedQueryResult } from '../types';
+
+export default class Query<A, B> extends BaseRocQuery {
+  private request: AxiosInstance;
+  constructor(
+    viewName: string,
+    options: IQueryOptions,
+    request: AxiosInstance
+  ) {
+    super(viewName, options);
+    this.request = request;
+  }
+
+  public async fetch(options: IQueryOptions = {}): PromisedQueryResult<A, B> {
+    const params = Object.assign({}, this.baseOptions, options);
+
+    const response = await this.request({
+      url: '',
+      params
+    });
+    return response.data;
+  }
+}
diff --git a/src/real/ReduceQuery.ts b/src/real/ReduceQuery.ts
new file mode 100644
index 0000000..26fe68a
--- /dev/null
+++ b/src/real/ReduceQuery.ts
@@ -0,0 +1,37 @@
+import { AxiosInstance } from 'axios';
+
+import { BaseRocReduceQuery } from '../base';
+import {
+  IReduceQueryOptions,
+  IRocReduceQueryParams,
+  PromisedReduceQueryResult
+} from '../types';
+
+export default class ReduceQuery<A, B> extends BaseRocReduceQuery {
+  private request: AxiosInstance;
+  private baseOptions: IReduceQueryOptions;
+  constructor(
+    viewName: string,
+    options: IReduceQueryOptions,
+    request: AxiosInstance
+  ) {
+    super(viewName);
+    this.request = request;
+    this.baseOptions = options;
+  }
+
+  public async fetch(
+    options: IReduceQueryOptions = {}
+  ): PromisedReduceQueryResult<A, B> {
+    const requestOptions: IRocReduceQueryParams = {
+      ...this.baseOptions,
+      ...options,
+      reduce: true
+    };
+    const response = await this.request({
+      url: '',
+      params: requestOptions
+    });
+    return response.data;
+  }
+}
diff --git a/src/real/Roc.ts b/src/real/Roc.ts
new file mode 100644
index 0000000..c97fd4c
--- /dev/null
+++ b/src/real/Roc.ts
@@ -0,0 +1,91 @@
+import axios, { AxiosInstance } from 'axios';
+import { BaseRocReduceQuery } from '../base';
+import BaseRoc from '../base/BaseRoc';
+import BaseRocDocument from '../base/BaseRocDocument';
+import BaseRocQuery from '../base/BaseRocQuery';
+import {
+  ICouchUser,
+  INewDocument,
+  IQueryOptions,
+  IReduceQueryOptions
+} from '../types';
+import Query from './Query';
+import ReduceQuery from './ReduceQuery';
+import RocDocument from './RocDocument';
+
+export interface IRocConfig {
+  url: string;
+  database: string;
+}
+
+function createAxios(url: string) {
+  return axios.create({
+    baseURL: url,
+    withCredentials: true,
+    paramsSerializer(params) {
+      const keysToProcess = ['key', 'startkey', 'endkey'];
+      const searchParams = new URLSearchParams();
+      const keys = Object.keys(params);
+      for (const key of keys) {
+        if (keysToProcess.includes(key)) {
+          searchParams.append(key, JSON.stringify(params[key]));
+        } else {
+          searchParams.append(key, params[key]);
+        }
+      }
+      return searchParams.toString();
+    }
+  });
+}
+
+export default class Roc extends BaseRoc {
+  private url: string;
+  private dbUrl: string;
+  private request: AxiosInstance;
+  private dbRequest: AxiosInstance;
+
+  constructor(config: IRocConfig) {
+    super();
+    this.url = config.url;
+    this.request = createAxios(this.url);
+    this.dbUrl = new URL(`db/${config.database}/`, config.url).href;
+    this.dbRequest = createAxios(this.dbUrl);
+  }
+
+  public async create(newDocument: INewDocument): Promise<BaseRocDocument> {
+    const response = await this.dbRequest.post('entry', newDocument);
+    return this.getDocument(response.data.id);
+  }
+
+  public getDocument(uuid: string): RocDocument {
+    const url = new URL(`entry/${uuid}/`, this.dbUrl).href;
+    return new RocDocument(uuid, createAxios(url));
+  }
+
+  public getQuery<KeyType = any, ValueType = any>(
+    viewName: string,
+    options: IQueryOptions = {}
+  ): BaseRocQuery<KeyType, ValueType> {
+    return new Query<KeyType, ValueType>(
+      viewName,
+      options,
+      createAxios(new URL(`_query/${viewName}`, this.dbUrl).href)
+    );
+  }
+
+  public getReduceQuery<KeyType = any, ValueType = any>(
+    viewName: string,
+    options: IReduceQueryOptions = {}
+  ): BaseRocReduceQuery<KeyType, ValueType> {
+    return new ReduceQuery<KeyType, ValueType>(
+      viewName,
+      options,
+      createAxios(new URL(`_view/${viewName}`, this.dbUrl).href)
+    );
+  }
+
+  public async getUser(): Promise<ICouchUser> {
+    const response = await this.request.get('auth/session');
+    return response.data;
+  }
+}
diff --git a/src/real/RocDocument.ts b/src/real/RocDocument.ts
new file mode 100644
index 0000000..71d30d9
--- /dev/null
+++ b/src/real/RocDocument.ts
@@ -0,0 +1,85 @@
+import { AxiosInstance } from 'axios';
+
+import BaseRocDocument from '../base/BaseRocDocument';
+import {
+  IDocument,
+  IDocumentDraft,
+  IFetchAttachmentOptions,
+  INewAttachment
+} from '../types';
+import { addInlineUploads, deleteInlineUploads } from './utils';
+
+export default class RocDocument extends BaseRocDocument {
+  private request: AxiosInstance;
+
+  constructor(uuid: string, request: AxiosInstance) {
+    super(uuid);
+    this.request = request;
+  }
+
+  public async fetchAttachment(
+    name: string,
+    options: IFetchAttachmentOptions = {
+      type: 'text'
+    }
+  ): Promise<Buffer | string> {
+    const url = new URL(name, this.getBaseUrl()).href;
+    const response = await this.request({
+      url,
+      responseType: options.type
+    });
+    return response.data;
+  }
+
+  public async fetch(rev?: string): Promise<IDocument> {
+    if (rev) {
+      throw new Error('UNIMPLEMENTED fetch with rev');
+    }
+    const response = await this.request.get('');
+    this.value = response.data;
+    return response.data;
+  }
+
+  public async update(
+    content: object,
+    newAttachments?: INewAttachment[],
+    deleteAttachments?: string[]
+  ): Promise<IDocument> {
+    await this._fetchIfUnfetched();
+    let newDoc: IDocumentDraft = {
+      ...this.value!,
+      $content: content
+    };
+
+    if (deleteAttachments !== undefined) {
+      newDoc = deleteInlineUploads(newDoc, deleteAttachments);
+    }
+
+    if (newAttachments !== undefined) {
+      newDoc = await addInlineUploads(newDoc, newAttachments);
+    }
+
+    // Send the new doc
+    await this.request.put('', newDoc);
+
+    // Get the new document
+    // With updated properties ($lastModifification...)
+    // And new attachment list
+
+    await this.fetch();
+    return this.value!;
+  }
+
+  public addGroups(groups: string | string[]): Promise<string[]> {
+    throw new Error('UNIMPLEMENTED addGroups');
+  }
+
+  protected getBaseUrl() {
+    return this.request.defaults.baseURL || '';
+  }
+  private async _fetchIfUnfetched() {
+    if (this.value === undefined) {
+      await this.fetch();
+    }
+  }
+}
diff --git a/src/real/index.ts b/src/real/index.ts
new file mode 100644
index 0000000..2b57fd8
--- /dev/null
+++ b/src/real/index.ts
@@ -0,0 +1,5 @@
+import Query from './Query';
+import ReduceQuery from './ReduceQuery';
+import Roc from './Roc';
+import RocDocument from './RocDocument';
+export { Roc, RocDocument, Query, ReduceQuery };
diff --git a/src/real/utils.ts b/src/real/utils.ts
new file mode 100644
index 0000000..df95f79
--- /dev/null
+++ b/src/real/utils.ts
@@ -0,0 +1,46 @@
+import { produce } from 'immer';
+
+import {
+  ICouchInlineAttachment,
+  IDocumentDraft,
+  INewAttachment
+} from '../types';
+
+export async function addInlineUploads(
+  entry: IDocumentDraft,
+  attachments: INewAttachment[]
+) {
+  const attachmentsBase64 = await Promise.all(
+    attachments.map((attachment) => {
+      if (typeof attachment.data === 'string') {
+        return Promise.resolve(attachment.data);
+      } else {
+        // Buffer
+        return Promise.resolve(attachment.data.toString('base64'));
+      }
+    })
+  );
+
+  const newEntry = produce(entry, (draft: IDocumentDraft) => {
+    for (let i = 0; i < attachments.length; i++) {
+      const newAttachment: ICouchInlineAttachment = {
+        content_type: attachments[i].content_type,
+        data: attachmentsBase64[i]
+      };
+      draft._attachments[attachments[i].name] = newAttachment;
+    }
+  });
+
+  return newEntry;
+}
+
+export function deleteInlineUploads(
+  entry: IDocumentDraft,
+  attachmentNames: string[]
+) {
+  return produce(entry, (draft) => {
+    for (const name of attachmentNames) {
+      delete draft._attachments[name];
+    }
+  });
+}
diff --git a/src/types.ts b/src/types.ts
new file mode 100644
index 0000000..6b8b18f
--- /dev/null
+++ b/src/types.ts
@@ -0,0 +1,159 @@
+import {} from 'axios';
+
+// ============================
+// Roc
+// ============================
+export interface IRocOptions {
+  url: string;
+  database: string;
+  username?: string;
+  password?: string;
+  authTimeout?: number;
+}
+
+// ============================
+// Document
+// ============================
+export interface IRocDocumentOptions {
+  pollInterval?: number;
+}
+
+export interface INewDocument {
+  $id: any;
+  $content: object;
+  $kind: string;
+  $owners: string[];
+}
+
+export interface INewRevisionMeta {
+  $modificationDate: number;
+  _rev: string;
+}
+
+export interface IBaseDocument extends INewDocument, INewRevisionMeta {
+  _id: string;
+  $type: 'entry' | 'group';
+  $creationDate: number;
+  $lastModification: string;
+}
+
+export interface IDocument extends IBaseDocument {
+  _attachments: {
+    [key: string]: ICouchAttachmentStub;
+  };
+}
+
+export interface IDocumentDraft extends IBaseDocument {
+  _attachments: {
+    [key: string]: ICouchAttachment | ICouchInlineAttachment;
+  };
+}
+
+// ============================
+// Attachments
+// ============================
+interface ICouchAttachmentBase {
+  /* The resource's mime type */
+  content_type: string;
+}
+
+interface ICouchAttachment extends ICouchAttachmentBase {
+  /* base64 md5 digest of the resource */
+  digest: string;
+  /* Length in bytes of the resource */
+  length: number;
+  revpos: number;
+}
+export interface INewAttachment extends ICouchAttachmentBase {
+  /* The name of the resource */
+  name: string;
+  /* Buffer or base64 encoded url containing attachment data */
+  /* TODO: add Blob support for the browser */
+  data: Buffer | string;
+}
+
+export interface ICouchInlineAttachment extends ICouchAttachmentBase {
+  /* base64 string with attachment data */
+  data: string;
+}
+export interface IAttachment extends ICouchAttachmentStub {
+  /* The name of the resource */
+  name: string;
+  /* The url of the resource */
+  url: string;
+}
+export interface ICouchAttachmentStub extends ICouchAttachment {
+  stub: true;
+}
+
+export interface ICouchAttachmentData extends ICouchAttachment {
+  data: string;
+}
+
+export interface ICouchAttachments {
+  [key: string]: ICouchAttachmentStub;
+}
+
+// This will be exported in the next version of axios
+type ResponseType =
+  | 'arraybuffer'
+  | 'blob'
+  | 'document'
+  | 'json'
+  | 'text'
+  | 'stream';
+export interface IFetchAttachmentOptions {
+  type: ResponseType | 'buffer';
+}
+
+// ============================
+// View and Query
+// ============================
+export interface ICouchViewBase {
+  startKey?: any;
+  endKey?: any;
+  key?: any;
+}
+
+// Queries
+export interface IQueryOptions extends ICouchViewBase {
+  mine?: boolean;
+  includeDocs?: boolean;
+}
+
+// Views
+export interface IReduceQueryOptions extends ICouchViewBase {
+  group?: boolean;
+  groupLevel?: number;
+}
+
+export interface IRocReduceQueryParams extends IReduceQueryOptions {
+  reduce: true;
+}
+
+export interface IQueryResult<KeyType = any, ValueType = any> {
+  id: string;
+  key: KeyType;
+  doc?: IDocument;
+  value: ValueType;
+}
+
+export interface IReduceQueryResult<KeyType = any, ValueType = any> {
+  key: KeyType;
+  value: ValueType;
+}
+
+export type PromisedQueryResult<KeyType, ValueType> = Promise<
+  Array<IQueryResult<KeyType, ValueType>>
+>;
+
+export type PromisedReduceQueryResult<KeyType, ValueType> = Promise<
+  Array<IReduceQueryResult<KeyType, ValueType>>
+>;
+
+export interface ICouchUser {
+  username: string;
+  admin: boolean;
+  provider: string;
+  authenticated: boolean;
+}
diff --git a/tsconfig.base.json b/tsconfig.base.json
new file mode 100644
index 0000000..30c7611
--- /dev/null
+++ b/tsconfig.base.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "outDir": "./lib",
+    "target": "ESNext",
+    "module": "commonjs",
+    "strictNullChecks": false,
+    "strict": true,
+    "moduleResolution": "node",
+    "declaration": true
+  }
+}
diff --git a/tsconfig.es6.json b/tsconfig.es6.json
new file mode 100644
index 0000000..aa5ede5
--- /dev/null
+++ b/tsconfig.es6.json
@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "ES6",
+    "outDir": "lib-es6",
+    "declaration": false
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..83b2a2d
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,5 @@
+{
+  "extends": "./tsconfig.base.json",
+  "include": ["./src/**/*"],
+  "exclude": ["./src/**/__tests__"]
+}