Blocklet SDK (Node.js)

ArcBlock
2024-04-25 07:42
· edited
Blocklet SDK for blocklet developer
Install#yarn add @blocklet/sdkor
npm install @blocklet/sdkWallet#const { getWallet } = require('@blocklet/sdk');

// wallet is an instance of @ocap/wallet
const wallet = getWallet();
const { address, secretKey, publicKey } = wallet;Auth#Get Client#const { Auth } = require('@blocklet/sdk');

const client = new Auth();getUser#client.getUser(did)
Get user by user did
@param did string
@return { code, user }
getOwner#client.getOwner()
Get owner of the app
@param did string
@return { code, user }
getUsers#Get users of the app
By Default#client.getUsers();
client.getUsers({ paging: { page: 2 } });
client.getUsers({ query: { role: 'admin' } });
client.getUsers({ query: { approved: true } });
client.getUsers({ query: { search: 'Bob' } });
client.getUsers({ sort: { updatedAt: -1 } });@param paging Object
paging.pageSize 
The value of pageSize cannot exceed 100
paging.page 
@param query Object
query.role String Match users by role name
$none: Match users which does not have a role
query.approved Boolean Match users by approved
query.search String Match users by did or name
Search results by name are fuzzy matches
Search results by did are exact matches
@param sort Object
-1: The latest time is at first. 1: The latest time is at last. Default sort is { createdAt: -1 }
sort.createdAt Number
sort.updatedAt Number
sort.lastLoginAt Number
@return { code, users, paging }
Paging {
  total: number of users
  pageSize: number of users per page
  pageCount: number of page
  page: current page number
}By User DID#client.getUsers({ dids: ['did1', 'did2', ...] });
client.getUsers({ dids: ['did1', 'did2', ...], query: { approved: true } });@param Array<string> dids The user did list
> The length of dids cannot exceed 100
@param query Object
query.approved Boolean Match users by approved
@return { code, users }
Tips:
If you don't pass the dids parameter, the API will run by default
If you pass in a non-existing DID, the API will not report an error
updateUserApproval#Enable or disable a user by DID. A disabled user will not login to the blocklet again.
@param did string
@param approved boolean
@return { code, user }
client.updateUserApproval(did, true); // enable the user
client.updateUserApproval(did, false); // disable the usergetPermissionsByRole#client.getPermissionsByRole(role)
Get all permissions of a role
@param role string
@return { code, permissions }
getRoles#client.getRoles()
Get all roles of the app
@return { code, roles }
createRole#client.createRole({ name, title, description })
@param name string the key of the role, should be unique
@param title string
@param description string
@return { code, role }
updateRole#client.updateRole(name, { title, description })
@param name string the key of the role
@param title string
@param description string
@return { code, role }
deleteRole#client.deleteRole(name, { title, description })
@param name string the key of the role
@return { code }
issuePassportToUser#client.issuePassportToUser({ userDid, role })
@param userDid string
@param role string the key of the role. e.g. owner, admin, member
@return { code, user }
enableUserPassport#client.enableUserPassport({ userDid, passportId })
set passport status to valid
@param userDid string
@param passportId string passportId (get from user.passports)
@return { code, user }
revokeUserPassport#client.revokeUserPassport({ userDid, passportId })
set passport status to revoked
@param userDid string
@param passportId string passportId (get from user.passports)
@return { code, user }
grantPermissionForRole#client.grantPermissionForRole(role, permission)
@param role string the name of the role
@param permission string the name of the permission
@return { code }
revokePermissionFromRole#client.revokePermissionFromRole(role, permission)
@param role string the name of the role
@param permission string the name of the permission
@return { code }
updatePermissionsForRole#client.updatePermissionsForRole(role, permissions)
Full update permissions of a role
@param role string the name of the role
@param permissions array<string> name of the permissions
@return { code, role }
hasPermission#client.hasPermission(role, permission)
@param role string the name of the role
@param permission string the name of the permission
@return { code, result }
result boolean
getPermissions#client.getPermissions()
Get all permissions of the app
@return { code, permissions }
createPermission#client.createPermission({ name, title, description })
@param name Permission the key of the permission, should be unique
format: <action>_<resource>. e.g. query_article, mutate_user
@param description string
@return { code, role }
updatePermission#client.updatePermission(name, { title, description })
@param name string the key of the role
@param title string
@param description string
@return { code }
deletePermission#client.deletePermission(name, { title, description })
@param name string the key of the permission
@return { code }
login#client.login({ provider, did, pk, avatar, email, fullName, id, locale })
@return { user, token, refreshToken }
refreshSession#client.refreshSession({ refreshToken })
@param refreshToken string the refresh token 
@return { user, token, refreshToken }
Notification#const { Notification } = require('@blocklet/sdk');sendToUser#Notification.sendToUser(receiver, notification)
Send notification to an account
const userDid = 'xxxxxxxx';

const notification = {
  title: 'xxx',
  body: 'xxx',
  attachments: [
    {
      type: 'asset',
      data: {
        did: 'xxx',
        chainHost: 'https://chainhost',
      },
    },
  ],
  actions: [
    {
      name: 'xxx',
      title: 'Go To Website',
      link: 'https://arcblock.io',
    },
  ],
};

const content = { message: 'this is a message' };
const actions = [];

await Notification.sendToUser(userDid, notification);

await Notification.sendToUser(userDid, [notification, anotherNotification]);
await Notification.sendToUser([userDid, anotherUserDid], notification);
await Notification.sendToUser([userDid, anotherUserDid], [notification, anotherNotification]);notification Notification
receiver string | array<string> required
broadcast#Notification.broadcast(notification, options)
Broadcast notification to a channel
const notification = {
  title: 'xxx',
  body: 'xxx',
};

await Notification.broadcast(notification);
await Notification.broadcast(notification, { socketDid: 'did' });notification Notification
options
socketDid: String send notification to a specific socket by socketDid
socketId: String send notification to a specific socket by socketId
channel: String send notification to which channel (Default: app public channel)
event: String send notification to which event (Default: 'message')
Notification Type#notification object | array<object> required
notification.title string
notification.body string
notification.attachments array<object>
attachment.type enum 'asset', 'vc', 'token' required
attachment.data object
type: text
type string
message string
type: asset
did string
chainHost string uri
type: vc
credential object
tag string
type: token
address string did
amount string
symbol string
senderDid string
chainHost string
decimal integer
notification.actions array<object>
name string required
title string
color string
bgColor string
link string uri
on#Notification.on()
Listen for system notification
Notification.on('hi', () => {});off#Notification.off()
Cancel listening for system messages
const handler = () => {};

Notification.on('hi', handler);
Notification.off('hi', handler);System Events#'hi'#When the client joins the app public channel
Notification.on('hi', ({ sender: { socketId, did } }) => {});sender object
sender.socketId string
sender.did string
DID Connect#import AuthStorage from '@arcblock/did-auth-storage-nedb';
import { WalletAuthenticator, WalletHandlers } from '@blocklet/sdk';

const authenticator = new WalletAuthenticator();

const handlers = new WalletHandlers({
  authenticator,
  tokenGenerator: () => Date.now().toString(),
  tokenStorage: new AuthStorage({
    dbPath: path.join(process.env.BLOCKLET_DATA_DIR, 'auth.db'),
    onload: (err) => {
      if (err) {
        // eslint-disable-next-line no-console
        console.error(`Failed to load database from ${path.join(process.env.BLOCKLET_DATA_DIR, 'auth.db')}`, err);
      }
    },
  }),
});Database#A database library for develop blocklet, it's a wrapper of nedb.
Supply a simpler way to use nedb. Just use new Database([dbName]), or you can pass a object option as second parameter to create a database as origin nedb way new Database([dbName], [options])
Supply full-promise and typescript support.
import { Database } from '@blocklet/sdk';

// Getting Started
(async () => {
  const db = new Database('demo.db');
  const inserted = await db.insert({ key: 'value' });
  const docs = await db.find({});
  const paginated = await db.cursor({}).skip(1).limit(10).exec();
})();

// Extend with class
(async () => {
  class MyDatabase extends Database {
    async extraFn() {
      return 'extra';
    }
  }
  const db = new MyDatabase('demo.db');
  const inserted = await db.insert({ key: 'value' });
  const docs = await db.find({});
  const paginated = await db.cursor({}).skip(1).limit(10).exec();
  const extra = await db.extraFn();
})();Environment#import { env } from '@blocklet/sdk';

const {
  appId, // the did of the app
  appPid, // the permenant did of the app
  appIds, // all did's that the application has previously used
  appName, // the title of the app, used to display to user
  appDescription, // the description of the app
  appUrl, // the web url of the app
  appStorageEndpoint // the endpoint of the DID Spaces of the app
  componentDid, // the did of the blocklet
  dataDir, // the data dir of the blocklet
  cacheDir, // the cache dir of the blocklet
  mode, // in which mode the blocklet is running
  serverVersion: // the version of the server where the app is running
  preferences, // blocklet preferences. default: {}
} = env;Please reference Blocklet Preferences for how to change the structure and value in env.preferences.
mode#In which mode the blocklet is running
env.mode === 'development'; // The blocklet is running in the development mode
env.mode === 'production'; // The blocklet is running in the production modeConfig#Unlike Environment, the information in Config will be updated in real time, the application does not need to be restarted, and events will be thrown when updating
import { env, components, events, Events } from '@blocklet/sdk/lib/config'env same as env in Environment
appId the did of the app
appPid the permenant did of the app
appIds all did's that the application has previously used
appName the title of the app, used to display to user
appDescription the description of the app
appUrl the web url of the app
appStorageEndpoint the endpoint of the DID Spaces of the app
componentDid 组件 DID
dataDir the data dir of the blocklet
cacheDir the cache dir of the blocklet
mode in which mode the blocklet is running
serverVersion the version of the server where the app is running
preferences blocklet preferences. default: {}
components Array\<object\>
title component title
did component did
name component name
version component version
mountPoint e.g. '/', '/blog'
status import(@blocklet/constant).BlockletStatus
port e.g. 5678
webEndpoint e.g. http://127.0.0.1:5678
resources Array<string> component resource path
events.on(Events.componentAdded, (components) => {});
events.on(Events.componentRemoved, (components) => {});
events.on(Events.componentStarted, (components) => {});
events.on(Events.componentStopped, (components) => {});
events.on(Events.componentUpdated, (components) => {});

events.on(Events.envUpdate, (envs: {key: string; value: string}[]) => {});Component#import { Component } from '@blocklet/sdk';getComponentWebEndpoint#Component.getComponentWebEndpoint(name)
Get endpoint of component of app
@param name string the name or title or did of the component bundle
If the blocklet.yml of component is
did: did1
name: demo-blocklet
title: Demo Blockletthe blocklet should use like this:
Component.getComponentWebEndpoint('did1')
Component.getComponentWebEndpoint('demo-blocklet')
Component.getComponentWebEndpoint('Demo Blocklet')@return endpoint of the first-level component. e.g. http://127.0.0.1:5678
getComponentMountPoint#Component.getComponentMountPoint(name)
Get mount point of component of app
@param name string the name or title or did of the component bundle
If the blocklet.yml of component is
did: did1
name: demo-blocklet
title: Demo Blockletthe blocklet should use like this:
Component.getComponentMountPoint('did1')
Component.getComponentMountPoint('demo-blocklet')
Component.getComponentMountPoint('Demo Blocklet')@return mount point of the first-level component. e.g. /abc
call#Communicate with component component safely
Component.call({ name, path, data })
@param name string the name or title or did of the component bundle
@param path string the http api. e.g. /api/xxx
@param data object the payload
@param method object http method
@param responseType undefined | 'stream' response type
@return object the response of axios https://github.com/axios/axios#response-schema
e.g.
component-1:
import { Component, middlewares } from '@blocklet/sdk';

const app = express();

app.post(
  '/api/component-2',

  // You should use verifySig middleware to prevent unknown request
  middlewares.component.verifySig,

  (req, res) => {
    // req.body is { msg: "ping from component-2" } if the request is from component-2

    res.json({ msg: 'pong from component-1' });
  }
);

// data: { msg: 'pong from component-2' }
const { data } = await Component.call({
  name: 'component-1',
  path: '/api/component-2',
  data: { msg: 'ping from component-1' },
});component-2:
const app = express();

app.post(
  '/api/component-2',

  // You should use verifySig middleware to prevent unknown request
  middlewares.component.verifySig,

  (req, res) => {
    // req.body is { msg: "ping from component-1" } if the request is from component-1

    res.json({ msg: 'pong from component-2' });
  }
);

// data: { msg: 'pong from component-1' }
const { data } = await Component.call({
  path: '/api/component-1',
  data: 'ping from component-2',
});Middlewares#User#import express from 'express';
import { middlewares } from '@blocklet/sdk';

const app = express();

app.get('/', middlewares.user(), (req, res) => {
  const { did, fullName, role } = req.user;
});Access#import express from 'express';
import { middlewares } from '@blocklet/sdk';

const app = express();

app.get('/auth1', middlewares.auth(), (req, res) => {
  // will return 401 if user is not connected
});

app.get('/auth2', middlewares.auth({ roles: ['admin', 'owner'] }), (req, res) => {
  // will return 401 if user is not connected
  // will return 403 if user role is neither owner nor admin
});

app.get('/auth3', middlewares.auth({ permissions: ['mutate_data', 'query_data'] }), (req, res) => {
  // will return 401 if user is not connected
  // will return 403 if neither 'mutate_data' nor 'query data' in user permissions
});

app.get(
  '/auth4',
  middlewares.auth({ roles: ['admin', 'owner'], permissions: ['mutate_data', 'query_data'] }),
  (req, res) => {
    // will return 401 if user is not connected
    // will return 403 if user role is neither owner nor admin
    // will return 403 if neither 'mutate_data' nor 'query data' in user permissions
  }
);Secure communication between components#import express from 'express';
import { middlewares } from '@blocklet/sdk';

const app = express();

app.post('/component-private-api', middlewares.component.verifySig, (req, res) => {
  // will return 400 if sig not found in req
  // will return 401 if verify sig failed
});Security#When blocklet needs to encrypt and decrypt sensitive information, the security module comes to help:
const assert = require('assert');
const { Security } = require('@blocklet/sdk');

const message = 'some sensitive info';
const encrypted = Security.encrypt(message);
const decrypted = Security.decrypt(encrypted);
assert.notEqual(encrypted, message);
assert.notEqual(encrypted, decrypted);
assert.equal(decrypted, message);
The security module uses AES encryption internally, all encryption params are derived from blocklet server secret key using a deterministic algorithm.
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