欢迎使用 DREP Blockchain SDK For PC

如果您是一位 PC 端区块链游戏开发者，并且想在游戏中开发基于区块链的支付体系，那么这篇教程很适合您。DREP Blockchain SDK将为您提供现实可用的开发环境，相信通过这篇教程您可以开发出优质的区块链游戏。本教程将以 DREP 测试网为例（SDK 同样支持 ETH 和 BTC）手把手教您使用 DREP SDK，开发教程分为以下几个步骤：

• 下载 DREP 区块链钱包，并获取 DREP 测试网代币（Windows/Mac）
• 申请 apikey 和 secretkey
• 使用 websocket 和本地 DREP 区块链钱包通信
• 正式环境如何使用

DREP 区块链钱包

DREP 区块链钱包是基于区块链的离线版钱包，目前支持的币种有 BTC、ETH、DREP(Test net)。DREP Blockchain 的详细信息请访问DREP 官网

1. 下载 DREP 钱包

下载 DREP wallet 并安装.

2. 创建 ETH（ropsten）私钥对并获取 ETH 测试网代币

请参考Wallet introductions 获取测试网代币：open https://faucet.ropsten.be/ ,and enter your eth testnet address

3.获取 apikey 与 secretkey

$ npm i drep-wallet-client-sdk -S 开发环境下:

const SDK = require('drep-wallet-client-sdk');
//dev
async function getKeys() {
  let result = SDK.getKeys('http://120.27.12.168:3018').data;
  const { apikey, secretkey } = result;
  console.log(result); //here are your keys
}

getKeys();

正式环境

const SDK = require('drep-wallet-client-sdk');
//prod
async function getKeys() {
  let result = SDK.getKeys('http://149.129.172.91:3018').data;
  const { apikey, secretkey } = result;
  console.log(result); //here are your keys
}

getKeys();

4. 本地测试环境中使用 websocket 连接 DREP PC 版钱包

javascript example

const SDK = require('./index');
const uuid = SDK.uuid;
let apikey =
  'MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAI7PLWeDmIV/kqa/v44WUK0JDNJEub5l\nHd2+l0QdKEJZJETafTTXHM115LSdfcuaWf25LOhOAKkLHhaNqicOuKMCAwEAAQ==';
let privKey =
  '\nMIIBVQIBADANBgkqhkiG9w0BAQEFAASCAT8wggE7AgEAAkEAjs8tZ4OYhX+Spr+/\njhZQrQkM0kS5vmUd3b6XRB0oQlkkRNp9NNcczXXktJ19y5pZ/bks6E4AqQseFo2q\nJw64owIDAQABAkBtenPjVCXbybXiMUMnKQJF9JcoptkCFcB0msSZygRv/4MuJUP5\nSjoIMjT/jDfPRc/KphA60TahFOtC52buKO2hAiEAwzFEJY3KUe5GWI1mZlD/kf9Z\nQqMjsSnh/fNsncntR1ECIQC7TFFQWRLMYL8LVN6Gq0shBNI2KDx36YkM8EIILCdr\nswIhALQKo1MIYFAGOni/pG5H1BS0tX6Tv/5QJZX6jHtWoDihAiBqQD8Yr48kdfWq\nvfiGuQGjt5Jwup6i/86JknpDHJk4VQIhALnEgA0jgKkvtdbvQkanXMeoH/2Rfel3\npZhTyjlQZzEC\n';

const sdk = new SDK(apikey, privKey, 'ws://127.0.0.1:12131/sdk'); //yourApiKey is the apikey you get in step 3, yourPrivKey is the secretKey you get in step 3
const client = sdk.client;
const sign = sdk.sign;
sdk.connect(); //connect wallet client
//add event handler
client.on('connectFailed', function(error) {
  console.log('Connect Error:' + error.toString());
});
let ws;
client.on('connect', function(connection) {
  ws = connection;
  //send transaction request to wallet client if user send a transfer request
  ws.send(
    sign({
      token_type: 'dreperc20',
      amount: '0.00001',
      to: '0xf54c3929B14D2deaf34A6572828D98338F43B789',
      id: uuid()
    })
  );
  console.log('WebSocket Client a Connected');
  connection.on('error', function(error) {
    console.log('Connection Error: ' + error.toString());
  });
  connection.on('close', function() {
    console.log('wallet Connection Closed');
  });
  connection.on('message', data => {
    let resJson = JSON.parse(data.utf8Data);
    console.log(resJson);
    if (resJson.authenticated) {
      if (Number(resJson.authenticated) === 1) {
        console.log('you have been authenticated');
      } else {
        throw new Error(
          'you are not be authenticated,please check your apikey and prikey'
        );
      }
    } else {
      throw new Error('wallet error');
    }
  });
});

5. 正式环境

example:

• 1.node drep-wallet-client-sdk/example-prod/server.js
• 2.node drep-wallet-client-sdk/example-prod/example-prod.js

Tips:

• 获取的 secretkey 必需放在服务器上对交易信息签名

6. websocket API

####Request API

| Key | Value | Description | | ---------- | ------ | ------------------------------------- | | token_type | string | the type of token you will transfer | | amount | string | the amount of token you will transfer | | to | string | the address of token you will send | | id | string | the id of this transaction |

####Response API

| Key | Value | Description | | ------------- | ------ | ---------------------------------------------------- | | authenticated | number | 0:authenticated successfully ,1:authenticated failed | | hash | string | the hash of transaction you had sent | | error | string | the error when transferring | | id | string | the id of this transaction |

7. Error Detail

| code | detail | | ---- | -------------------------------------------------------------- | | 1000 | user cancel | | 1001 | Server validation failed(game developer) | | 1002 | internet server error | | 1003 | Transaction signature failed | | 1004 | user password incorrect | | 1005 | local wallet error | | 1006 | balance is not enough | | 1007 | the address of this token is not exist,please create it later! | | 1008 | error when send transaction. |

8. Github

DREP SDK

9. 如其他问题请提 issues