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通过 Nodejs 买卖 Bitcoin
Github Repo
方案一: 通过 ExinCore API 进行币币交易
Exincore 提供了基于 Mixin Network 的币币交易 API.
你可以支付 USDT 给 ExinCore, ExinCore 会以最低的价格，最优惠的交易费将你购买的比特币转给你, 每一币交易都是匿名的，并且可以在区块链上进行验证，交易的细节只有你与 ExinCore 知道！
ExinCore 也不知道你是谁，它只知道你的 UUID.
预备知识:
你先需要创建一个机器人, 方法在 教程一.
安装依赖包
正如教程一里我们介绍过的，我们需要依赖 mixin-node-client, 你应该先安装过它了，这儿我们再安装其它的软件包.
yarn add fast-csv inquirer msgpack5 path pem-file
or
npm i fast-csv inquirer msgpack5 path pem-file
充币到 Mixin Network, 并读出它的余额.
通过 ExinCore API, 可以进行 BTC, USDT, EOS, ETH 等等交易，此处演示用 USDT 购买 BTC 或者 用 BTC 购买 USDT。交易前，先检查一下钱包地址。完整的步骤如下:
检查比特币或 USDT 的余额，钱包地址。并记下钱包地址。
从第三方交易所或者你的冷钱包中，将币充到上述钱包地址。
再检查一下币的余额，看到帐与否。(比特币的到帐时间是 5 个区块的高度，约 100 分钟)。
比特币与 USDT 的充值地址是一样的。
let aesKey = ”;
const privateKeyBytes = pem.decode(Buffer.from(data[0]));
const aesKeyBuffer = await oaepDecrypt(
Buffer.from(data[1], ‘base64’),
privateKeyBytes,
‘SHA-256’,
Buffer.from(data[2])
);
aesKey = Buffer.from(aesKeyBuffer).toString(‘base64’);
// console.log(aesKey);
const newUserConfig = {clientId: data[3], aesKey: aesKey,
privateKey: data[0], sessionId: data[2],
clientSecret: “do not need”, assetPin: data[4]};
// console.log(newUserConfig);
const newUserClient = new HttpClient(newUserConfig);
if (args.type === TYPE_ASSETS_INFO) {
const assetsInfo = await newUserClient.getUserAssets();
console.log(assetsInfo);
} else if (args.type === TYPE_BITCOIN_INFO) {
// console.log(‘You choice to 1:’, args);
const assetInfo = await newUserClient.getUserAsset(BTC_ASSET_ID);
console.log(“Bitcoin address is “, assetInfo.public_key);
console.log(“Bitcoin balance is “, assetInfo.balance);
console.log(“Bitcoin price is (USD) “, assetInfo.price_usd);
查询 ExinCore 市场的价格信息
如何来查询 ExinCore 市场的价格信息呢？你要先了解你交易的基础币是什么，如果你想买比特币，卖出 USDT, 那么基础货币就是 USDT; 如果你想买 USDT, 卖出比特币，那么基础货币就是比特币.
if (args.type === TYPE_FETCH_USDT_MARKETINFO) {
// Make a request
var instance = axios.create({
baseURL: ‘https://exinone.com/exincore/markets’,
timeout: 3000,
headers: {‘X-Custom-Header’: ‘foobar’}
});
instance.get(‘?base_asset=’ + USDT_ASSET_ID)
.then(function(response) {
console.log(response.data.data);
});
} else if (args.type === TYPE_FETCH_BTC_MARKETINFO) {
var instance = axios.create({
baseURL: ‘https://exinone.com/exincore/markets’,
timeout: 3000,
headers: {‘X-Custom-Header’: ‘foobar’}
});
instance.get(‘?base_asset=’ + BTC_ASSET_ID)
.then(function(response) {
console.log(response.data.data);
});
}
交易前，创建一个 Memo!
在第二章里, 基于 Mixin Network 的 Nodejs 比特币开发教程: 机器人接受比特币并立即退还用户, 我们学习过退还用户比特币，在这里，我们除了给 ExinCore 支付币外，还要告诉他我们想购买的币是什么，即将想购买的币存到 memo 里。
const bytes = Buffer.from(
BTC_ASSET_ID.replace(/-/g, ”),
‘hex’
);
const memo = msgpack
.encode({
A: bytes,
})
.toString(‘base64’);
console.log(memo);
币币交易的完整流程
转币给 ExinCore 时，将 memo 写入你希望购买的币，否则，ExinCore 会直接退币给你！如果你想卖出比特币买入 USDT, 调用方式如下：
const EXIN_BOT = “61103d28-3ac2-44a2-ae34-bd956070dab1”;
const BTC_ASSET_ID = “c6d0c728-2624-429b-8e0d-d9d19b6592fa”;
const EOS_ASSET_ID = “6cfe566e-4aad-470b-8c9a-2fd35b49c68d”;
const USDT_ASSET_ID = “815b0b1a-2764-3736-8faa-42d694fa620a”;
//change to your third exchange/cold btc wallet address
const BTC_WALLET_ADDR = “14T129GTbXXPGXXvZzVaNLRFPeHXD1C25C”;
const EOS_WALLET_NAME = “huobideposit”;
const EOS_WALLET_TAG = “1872050”;
//change to your mixin messenger account ‘s uuid
const MASTER_UUID = “0b4f49dc-8fb4-4539-9a89-fb3afc613747″;
else if (args.type === TYPE_EXCHANGE_BTC_USDT) {
// Pack memo
const bytes = Buffer.from(
USDT_ASSET_ID.replace(/-/g, ”),
‘hex’
);
const memo = msgpack
.encode({
A: bytes,
})
.toString(‘base64’);
console.log(memo); // gaFBxBDG0McoJiRCm44N2dGbZZL6
const assetInfo = await newUserClient.getUserAsset(BTC_ASSET_ID);
console.log(“The Wallet ‘s BTC balance is “, assetInfo.balance);
if (assetInfo.balance >= 0.0001) {
const Obj = {
assetId: BTC_ASSET_ID,
recipientId: EXIN_BOT,
traceId: newUserClient.getUUID(),
amount: “0.0001”,
memo: memo,
}
console.log(Obj);
newUserClient.transferFromBot(Obj);
} else {
console.log(“Not enough BTC!”);
}
}
如果你想卖出 USDT 买入比特币, 调用方式如下：
else if (args.type === TYPE_EXCHANGE_USDT_BTC) {
// Pack memo
const bytes = Buffer.from(
BTC_ASSET_ID.replace(/-/g, ”),
‘hex’
);
const memo = msgpack
.encode({
A: bytes,
})
.toString(‘base64’);
console.log(memo);
const assetInfo = await newUserClient.getUserAsset(USDT_ASSET_ID);
console.log(“The Wallet ‘s BTC balance is “, assetInfo.balance);
if (assetInfo.balance >= 1) {
const Obj = {
assetId: USDT_ASSET_ID,
recipientId: EXIN_BOT,
traceId: newUserClient.getUUID(),
amount: “1”,
memo: memo,
}
console.log(Obj);
newUserClient.transferFromBot(Obj);
} else {
console.log(“Not enough USDT!”);
}
}
交易完成后，Exincore 会将你需要的币转到你的帐上，同样，会在 memo 里，记录成交价格，交易费用等信息！你只需要按下面的方式解开即可！
getSnapshots 读取钱包的交易记录。
if (args.type === TYPE_READ_SNAPSHOTS) {
const prompts = [
{
name: ‘datetime’,
type: ‘input’,
message: “Input iso8601 datetime: “,
},
];
const answers = await inquirer.prompt(prompts);
console.log(answers);
console.log(encodeURIComponent(answers.datetime));
const snapshots = await newUserClient.getSnapshots({limit: 10, asset: USDT_ASSET_ID, offset: answers.datetime, order: “ASC”});
// console.log(snapshots);
snapshots.forEach(function(element) {
if (element.amount > 0) {
if (element.data != null) {
console.log(element.amount);
console.log(element.data);
const buf = Buffer.from(element.data, ‘base64’);
console.log(msgpack.decode(buf));
const codeInt = msgpack.decode(buf).C;
if (codeInt === 1000) {
console.log(“Successful Exchange”);
} else {console.log(“Go to there get more info https://github.com/exinone/exincore#code error code: ” + codeStr);}
const hexStr = Buffer.from(msgpack.decode(buf).FA).toString(‘hex’);
const uuid = `${hexStr.slice(0,8)}-${hexStr.slice(8,12)}-${hexStr.slice(12,16)}-${hexStr.slice(16,20)}-${hexStr.slice(20)}`;
console.log(“Asset uuid is :” + uuid);
const priceStr = msgpack.decode(buf).P;
console.log(“Price is :” + priceStr);
const feeStr = msgpack.decode(buf).F;
console.log(“Fee is :” + feeStr);
console.log(“percent of Fee is :” + (feeStr/element.amount)* 100 + ” %”);
const tStr = msgpack.decode(buf).T;
console.log(“T is :” + tStr);
}
}
});
}
一次成功的交易如下：
Make your choose 16: Read snapshots
You choice to : {type: ’16: Read snapshots’}
You wallet is : 0b10471b-1aed-3944-9eda-5ab947562761
? Input iso8601 datetime: 2019-04-08T05:16:33.615253Z
{datetime: ‘2019-04-08T05:16:33.615253Z’}
2019-04-08T05%3A16%3A33.615253Z
0.5228004
hqFDzQPooVCnNTI0OC45OKFGqTAuMDAxMDQ5OKJGQcQQgVsLGidkNzaPqkLWlPpiCqFUoVKhT8QQeJyt3MrqSGOpbqzFXy5JUw==
{C: 1000,
P: ‘5248.98’,
F: ‘0.0010498’,
FA: <Buffer 81 5b 0b 1a 27 64 37 36 8f aa 42 d6 94 fa 62 0a>,
T: ‘R’,
O: <Buffer 78 9c ad dc ca ea 48 63 a9 6e ac c5 5f 2e 49 53> }
Successful Exchange
Asset uuid is :815b0b1a-2764-3736-8faa-42d694fa620a
Price is :5248.98
Fee is :0.0010498
percent of Fee is :0.2008032128514056 %
T is :R
You select the : 0b10471b-1aed-3944-9eda-5ab947562761
You select the wallet 0b10471b-1aed-3944-9eda-5ab947562761
读取币的余额
通过读取币的余额，来确认交易情况！
if (args.type === TYPE_BITCOIN_INFO) {
// console.log(‘You choice to 1:’, args);
const assetInfo = await newUserClient.getUserAsset(BTC_ASSET_ID);
console.log(“Bitcoin address is “, assetInfo.public_key);
console.log(“Bitcoin balance is “, assetInfo.balance);
console.log(“Bitcoin price is (USD) “, assetInfo.price_usd);
}
源代码执行
编译执行，即可开始交易了.
[x] node bitcoin-wallet-nodejs.js 编译项目.
本代码执行时的命令列表:
Make your choose(select the uuid for open the specified wallet): 0b10471b-1aed-3944-9eda-5ab947562761 You select the : 0b10471b-1aed-3944-9eda-5ab947562761You select the wallet 0b10471b-1aed-3944-9eda-5ab947562761?Make your choose (Use arrow keys)
0: Read All Asssets Balance
1: Read Bitcoin Balance & Address
2: Read USDT Balance & Address
3: Read EOS Balance & Address
4: Transfer BTC from Bot to Wallet
5: Transfer EOS from Bot to Wallet
6: Transfer BTC from Wallet to Master
7: Transfer EOS from Wallet to Master
8: Verify Wallet PIN
9: BTC withdraw
10: EOS withdraw
11: Fetch BTC withdrawal info
12: Fetch EOS withdrawal info
13: Fetch USDT Market info
14: Fetch BTC Market info
14: Transfer 0.0001 BTC buy USDT
15: Transfer USDT $1 buy BTC
16: Read snapshots
Exit
完整代码
Solution Two: List your order on Ocean.One exchange
