JavaScript SDK

This page explains how to use App2App JavaScript SDK to use Klip with your BApp.

Prerequisites

(When using npm) node 10 or higher

Environment Setup

Klip JavaScript SDK doesn't require a separate registration process and works in any environments where HTTP communication is possible. But since user's consent is received using Klip located in the More[…] tab in the mobile app KakaoTalk, you need to have KakaoTalk installed to make the requests.

When using npm

Install using the npm install klip-sdk or yarn add klip-sdk command. It should be imported as an ES module as shown below:

import { prepare, request, getResult, getCardList } from 'klip-sdk'

When downloading the file directly

Download Klip JavaScript SDK in the Download tab. Place the file in the repository and insert a script tag in the HTML file as shown below:

<script src="./lib/klipSDK-2.0.0.min.js"></script>

Access each method using the klipSDK variable declared in the global namespace.

klipSDK.prepare(...)
klipSDK.request(...)
klipSDK.getResult(...)
klipSDK.getCardList(...)

API

Overview

App2App API requests are made in the order: prepare, request, and getResult.

prepare is the step in which requests (from of a total of five) are defined
request is the step in which the function is called and the signing takes place on Klip
getResult is the step in which the result is returned from the function call

In addition, getCardList is a function for the convenience of BApp developers that returns a list of NFTs of Klip users. If you need help with this document or Klip in general, please visit our Developer Forum.

prepare

Prepares a App2App API request and obtains a request key.

prepare.auth

Obtains user information.

Parameters

Name

Type

Description

bappName

string

The name of the BApp displayed to users

successLink

string

(optional) The return link after obtaining user consent

failLink

string

(optional) The return link in case of a problem while obtaining user consent

Example

const bappName = 'my app'
const successLink = 'myApp://...'
const failLink = 'myApp://...'
const res = await prepare.auth({ bappName, successLink, failLink })
if (res.err) {
  // Handle error
} else if (res.request_key) {
  // Store request_key
}

If you need help with this document or Klip in general, please visit our [Developer Forum](https://forum.klaytn.com/c/klip-api/28).

prepare.sendKLAY

A request to send a user's KLAY to a certain address.

Parameters

Name

Type

Description

bappName

string

The name of the BApp displayed to users

string

The address of the recipient

amount

string

The amount of KLAY to send (Unit: KLAY, up to the 6th decimal place)

from

string

(optional) To check if the Klip account address matches with the from address

successLink

string

(optional) The return link after obtaining user consent

failLink

string

(optional) The return link in case of a problem while obtaining user consent

Example

const bappName = 'my app'
const from = '0xB21F0285d27beb2373EC...'
const to = '0xD8b1dC332...'
const amount = '13.2'
const successLink = 'myApp://...'
const failLink = 'myApp://...'
const res = await prepare.sendKLAY({ bappName, from, to, amount, successLink, failLink })
if (res.err) {
  // Handle error
} else if (res.request_key) {
  // Store request_key
}

If you need help with this document or Klip in general, please visit our [Developer Forum](https://forum.klaytn.com/c/klip-api/28).

prepare.sendToken

A request to send a user's tokens to a certain address.

Parameters

Name

Type

Description

bappName

string

The name of the BApp displayed to users

string

The address of the recipient

amount

string

The amount of tokens to send (Unit: The default unit of the token, up to the 6th decimal place)

contract

string

The address of the token contract

from

string

(optional) To check if the Klip account address matches with the from address

successLink

string

(optional) The return link after obtaining user consent

failLink

string

(optional) The return link in case of a problem while obtaining user consent

Example

const bappName = 'my app'
const from = '0xB21F0285d27beb2373EC...'
const to = '0xD8b1dC332...'
const amount = '10.123'
const contract = '0x813FB7677BbBAA...'
const successLink = 'myApp://...'
const failLink = 'myApp://...'
const res = await prepare.sendToken({ bappName, from, to, amount, contract, successLink, failLink })
if (res.err) {
  // Handle error
} else if (res.request_key) {
  // Store request_key
}

If you need help with this document or Klip in general, please visit our [Developer Forum](https://forum.klaytn.com/c/klip-api/28).

prepare.sendCard

A request to send a user's NFT to a certain address.

Parameters

Name

Type

Description

bappName

string

The name of the BApp displayed to users

string

The address of the recipient

string

ID of the NFT

contract

string

The address of the NFT contract

from

string

(optional) To check if the Klip account address matches with the from address

successLink

string

(optional) The return link after obtaining user consent

failLink

string

(optional) The return link in case of a problem while obtaining user consent

Example

const res = await prepare.sendCard({ bappName, from, to, id, contract, successLink, failLink })
if (res.err) {
  setErrorMsg(res.err)
} else {
  setRequestKey(res.request_key)
}

If you need help with this document or Klip in general, please visit our [Developer Forum](https://forum.klaytn.com/c/klip-api/28).

prepare.executeContract

A request for the user to execute the functino of a certain contract.

Parameters

Name

Type

Description

bappName

string

The name of the BApp displayed to users

string

The address of the contract

value

string

Amount of KLAY to be sent during contract execution (unit: peb)

abi

string

ABI of the function to execute

params

string

List of parameters of the function to execute

from

string

(optional) To check if the Klip account address matches with the from address

successLink

string

(optional) The return link after obtaining user consent

failLink

string

(optional) The return link in case of a problem while obtaining user consent

Example

const bappName = 'my app'
const from = '0xB21F0285d27beb2373EC...'
const to = '0xD8b1dC332...'
const value = '800000000'
const abi = "{\"constant\":false,\"inputs\":[{\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"buyCard\",\"outputs\":[],\"payable\":true,\"stateMutability\":\"payable\",\"type\":\"function\"}"
const params =  "[\"2829\"]"
const successLink = 'myApp://...'
const failLink = 'myApp://...'
const res = await prepare.executeContract({ bappName, from, to, value, abi, params, successLink, failLink })
if (res.err) {
  // Handle error
} else if (res.request_key) {
  // Store request_key 
}

If you need help with this document or Klip in general, please visit our [Developer Forum](https://forum.klaytn.com/c/klip-api/28).

Klip request

Request authentification or signature using deep link. If the device doesn't have KakaoTalk installed, or the version of the installed KakaoTalk doesn't support Klip, it redirects automatically to the download page on Google Play. You need to pass the request key obtained during the prepare step as a parameter. To implement the request step using QR code, please refer to QR Code Tutorial.

Parameters

Name

Type

Description

requestKey

String

Request number

onUnsupportedEnvironment

Function

(optional) The callback function to execute in a non-mobile environment

Example

request('b37f873d-32ce-4d5d-b72e-08d528e7fb8e', () => alert('Please execute in a mobile environment'))

If you need help with this document or Klip in general, please visit our [Developer Forum](https://forum.klaytn.com/c/klip-api/28).

getResult

Returns the response of an App2App API request.

Parameters

Name

Type

Description

requestKey

String

Request number

Example

getResult('b37f873d-32ce-4d5d-b72e-08d528e7fb8e')

If you need help with this document or Klip in general, please visit our [Developer Forum](https://forum.klaytn.com/c/klip-api/28).

getCardList

Returns a list of a user's Cards (NFTs). You have to know the contract address of the NFTs that you want to return. It must be a contract supported on Klip.

Parameters

Name

Type

Description

contract

String

The contract address of the Cards to retrieve

eoa

String

Address of the user to retrieve

cursor

String

(optional) The pointer after which the next request will retrieve the next 100 items if the number of Cards exceeds 100

Example

const contract = '0xB21F0285d27beb2373EC...'
const eoa = '0xD8b1dC332...'
const cursor = ''
getCardList({ contract, eoa, cursor })

If you need help with this document or Klip in general, please visit our [Developer Forum](https://forum.klaytn.com/c/klip-api/28).

Error Code

Http Status

Error Code

Description

Same as

If you need help with this document or Klip in general, please visit our [Developer Forum](https://forum.klaytn.com/c/klip-api/28).

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Last updated 3 years ago