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基于 Mixin Network 的 Nodejs 比特币开发教程: 创建比特币钱包
我们已经创建过一个回复消息的机器人和一个能自动支付比特币的机器人.
通过本教程的学习，你可以学到如下内容
如何创建一个比特币钱包.
如何读取比特币钱包的余额.
如何支付比特币并即时确认.
如何将 Mixin Network 的比特币提现到你的冷钱包或第三方交易所.
前期准备：你要有一个 Mixin Network 账户。下面的代码创建一个帐号，并写到 csv 文件里。
console.log(“create wallet ….”);
const {generateKeyPairSync} = require(‘crypto’);
const {publicKey, privateKey} = generateKeyPairSync(‘rsa’,
{modulusLength: 1024, // the length of your key in bits
publicKeyEncoding: {
type: ‘spki’, // recommended to be ‘spki’ by the Node.js docs
format: ‘pem’
},
privateKeyEncoding: {
type: ‘pkcs1’, // recommended to be ‘pkcs8’ by the Node.js docs
format: ‘pem’,
//cipher: ‘aes-256-cbc’, // *optional*
//passphrase: ‘top secret’ // *optional*
}
});
publicKey1 = publicKey.replace(“—–BEGIN PUBLIC KEY—–“,””);
publicKey2 = publicKey1.replace(“—–END PUBLIC KEY—–“,””);
publicKey3 = publicKey2.replace(/\r?\n|\r/g, “”);
console.log(publicKey);
console.log(publicKey3);
(async () => {
const info = await clientBot.createUser({full_name : “nodejs bitcoin wallet”,
session_secret: publicKey3,
});
上面的语句会在本地创建一个 RSA 密钥对，然后调用 Mixin Network 来创建帐号，最后保存帐号信息到 csv 文件.
let aesKey = ”;
const privateKeyBytes = pem.decode(Buffer.from(privateKey));
const aesKeyBuffer = await oaepDecrypt(
Buffer.from(info.pin_token, ‘base64’),
privateKeyBytes,
‘SHA-256’,
Buffer.from(info.session_id)
);
aesKey = Buffer.from(aesKeyBuffer).toString(‘base64’);
console.log(aesKey);
var csvStream = csv.createWriteStream({headers: false, ignoreEmpty: true}),
writableStream = fs.createWriteStream(WalletName, {flags: ‘a’});
writableStream.on(“finish”, function(){
console.log(“Bitcoin wallet DONE!”);
});
csvStream.pipe(writableStream);
csvStream.write({a: privateKey, b: info.pin_token,
c: info.session_id, d: info.user_id,
e: “123456”}
);
csvStream.end();
fs.appendFile(WalletName, require(“os”).EOL, function(){});
const newUserConfig = {clientId: info.user_id, aesKey: aesKey,
privateKey: privateKey, sessionId: info.session_id,
clientSecret: “do not need”, assetPin: “123456”};
console.log(newUserConfig);
const newUserClient = new HttpClient(newUserConfig);
var info2 = await newUserClient.updatePin({oldPin : “”,
newPin: “123456”,
});
console.log(info2);
const verifyPin = await newUserClient.verifyPin(“123456”);
console.log({verifyPin});
现在你需要小心保管好你的帐号信息，在读取该账户的比特币资产余额或者进行其他操作时，将需要用到这些信息.
给新建的帐号创建一个比特币钱包
新账号并不默认内置比特币钱包，现在读一下比特币余额就可以创建一个比特币钱包。
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);
创建的帐号的比特币资产详细信息如下，其中 public key 就是比特币的存币地址:
Make your choose(select the uuid for open the specified wallet): 0b10471b-1aed-3944-9eda-5ab947562761
You select the : 0b10471b-1aed-3944-9eda-5ab947562761
You select the wallet 0b10471b-1aed-3944-9eda-5ab947562761
?
Make your choose 1: Read Bitcoin Balance & Address
You choice to : {type: ‘1: Read Bitcoin Balance & Address’}
You wallet is : 0b10471b-1aed-3944-9eda-5ab947562761
Bitcoin address is 15MySY7UnA827TRMQWuCKGiogCYXUmt21M
Bitcoin balance is 0
Bitcoin price is (USD) 5029.59915767
You select the : 0b10471b-1aed-3944-9eda-5ab947562761
You select the wallet 0b10471b-1aed-3944-9eda-5ab947562761
这个 API 能够提供若干与比特币有关的信息:
存币地址:[public_key]
Logo: [icon_url]
资产名字:[name]
资产在 Mixin Network 的 uuid: [asset_key]
对美元的价格 (Coinmarketcap.com 提供): [price_usd]
存币时确认的区块数量:[confirmations]
比特币私钥呢？
比特币的私钥呢？这个私钥被 Mixin Network 通过多重签名保护，所以对用户来说是不可见的, 比特币资产的提现和转账都需要用户提供正确的的 RSA 签名,PIN 代码与会话密钥才能完成.
不只是比特币，还有以太坊，EOS 等
这个帐号不只支持比特币，还支持以太坊，EOS 等, 完整的区块链支持列表. 这个账户同时也支持所有的 ERC20 代币与 EOS 代币.
创建其它的币的钱包与创建比特币钱包过程一样，读对应的资产余额就可以.
Mixin Network 当前支持的加密货币 (2019-02-19)
crypto
uuid in Mixin Network
EOS
6cfe566e-4aad-470b-8c9a-2fd35b49c68d
CNB
965e5c6e-434c-3fa9-b780-c50f43cd955c
BTC
c6d0c728-2624-429b-8e0d-d9d19b6592fa
ETC
2204c1ee-0ea2-4add-bb9a-b3719cfff93a
XRP
23dfb5a5-5d7b-48b6-905f-3970e3176e27
XEM
27921032-f73e-434e-955f-43d55672ee31
ETH
43d61dcd-e413-450d-80b8-101d5e903357
DASH
6472e7e3-75fd-48b6-b1dc-28d294ee1476
DOGE
6770a1e5-6086-44d5-b60f-545f9d9e8ffd
LTC
76c802a2-7c88-447f-a93e-c29c9e5dd9c8
SC
990c4c29-57e9-48f6-9819-7d986ea44985
ZEN
a2c5d22b-62a2-4c13-b3f0-013290dbac60
ZEC
c996abc9-d94e-4494-b1cf-2a3fd3ac5714
BCH
fd11b6e3-0b87-41f1-a41f-f0e9b49e5bf0
EOS 的存币地址与其它的币有些不同，它由两部分组成：account_name and account tag, 如果你向 Mixin Network 存入 EOS，你需要填两项数据：account name 是 eoswithmixin, 备注里输入你的 account_tag, 比如 0aa2b00fad2c69059ca1b50de2b45569.
EOS 的资产余额返回结果如下:
Make your choose 3: Read EOS Balance & Address
You choice to : {type: ‘3: Read EOS Balance & Address’}
You wallet is : 0b10471b-1aed-3944-9eda-5ab947562761
EOS account name is eoswithmixin tag is 30f0c36057b9b22151173b309bd0d79c
EOS balance is 0
EOS price is (USD) 5.26225922
You select the : 0b10471b-1aed-3944-9eda-5ab947562761
You select the wallet 0b10471b-1aed-3944-9eda-5ab947562761
存入比特币与读取比特币余额
现在，你可以向比特币的钱包存币了。
当然，在比特币网络里转币，手续费是相当贵的，费用的中位数在 0.001BTC, 按当前 4000 美元的价格，在 4 美元左右，有一个方便的办法，如果你有 Mixin Messenger 帐号，里面并且有比特币的话，可以直接提现比特币到新创建的帐号的比特币充值地址，它们在同一个 Mixin Network 网络内，手续费为 0，而且 1 秒到账。
下面的代码，可以读取比特币钱包余额.
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);
Mixin Network 网内免手续费的，并且即时确认
任何币在 Mixin Network 内部的交易，都是无手续费的，并且立刻到账。前期准备：账户设置了 PIN
对于新创建的帐号，我们通过 updatePin 来设置新 PIN 码, 代码如下：
var info2 = await newUserClient.updatePin({oldPin : “”,
newPin: “123456”,
});
console.log(info2);
const verifyPin = await newUserClient.verifyPin(“123456”);
console.log({verifyPin});
Mixin Network 帐号之间的比特币支付
通过 Mixin Messenger，我们可以先转比特币给机器人，然后让机器人转币给新用户。
const assetInfo = await newUserClient.getUserAsset(EOS_ASSET_ID);
console.log(“The Wallet ‘s EOS balance is “, assetInfo.balance);
if (assetInfo.balance > 0) {
const Obj = {
assetId: BTC_ASSET_ID,
recipientId: MASTER_UUID,
traceId: newUserClient.getUUID(),
amount: assetInfo.balance,
memo: ”,
};
console.log(Obj);
newUserClient.transferFromBot(Obj);
}
读取 Bitcoin 的余额，来确认比特币是不是转成功了！注意 newUserClient 是新用户的。
const assetInfo = await newUserClient.getUserAsset(BTC_ASSET_ID);
console.log(“Bitcoin address is “, assetInfo.public_key);
console.log(“Bitcoin balance is “, assetInfo.balance);
如何将比特币存入你的冷钱包或者第三方交易所
如果你希望将币存入你的冷钱包或者第三方交易所, 先要得到冷钱包或者你在第三方交易所的钱包地址，然后将钱包地址提交到 Mixin Network.
要点提示: 提现是需要支付收续费的, 准备好比特币包地址!
增加目的钱包地址到 Mixin Network
调用 createAddress API, 将会返回一个 address_id, 下一步的提现操作会用到这个 id。
const withdrawAddress = await newUserClient.createWithdrawAddress({
assetId: BTC_ASSET_ID,
label: ‘BTC withdraw’,
publicKey: BTC_WALLET_ADDR,
});
这里的 14T129GTbXXPGXXvZzVaNLRFPeHXD1C25C 就是一个比特币钱包地址, 如下所示，提现费用是 0.0025738 BTC, address_id 是 ”345855b5-56a5-4f3b-ba9e-d99601ef86c1″.
Make your choose 9: BTC withdraw
You choice to : {type: ‘9: BTC withdraw’}
You wallet is : 0b10471b-1aed-3944-9eda-5ab947562761
{type: ‘address’,
address_id: ‘a513da38-a18a-4536-abe4-d1c29ca3a1a8’,
asset_id: ‘c6d0c728-2624-429b-8e0d-d9d19b6592fa’,
public_key: ’14T129GTbXXPGXXvZzVaNLRFPeHXD1C25C’,
label: ‘BTC withdraw’,
account_name: ”,
account_tag: ”,
fee: ‘0.00212232’,
reserve: ‘0’,
dust: ‘0.0001’,
updated_at: ‘2019-04-04T02:20:42.552274992Z’ }
? Input you BTC amount:
创建提现地址成功后，你可以用 readAddress 读取最新的提现费。
const addressList = await newUserClient.getWithdrawAddress(BTC_ASSET_ID);
console.log(addressList);
提交提现请求，Mixin Network 会即时处理提现请求.
提交提现请求到 Mixin Network, withdrawAddress.address_id 就是 createAddress 创建的。
console.log(withdrawAddress);
const prompts = [
{
name: ‘amount’,
type: ‘input’,
message: “Input you BTC amount: “,
},
];
const answers = await inquirer.prompt(prompts);
console.log(answers);
const withdrawResult = await newUserClient.withdraw({
addressId: withdrawAddress.address_id,
assetId: BTC_ASSET_ID,
amount: answers.amount,
memo: ‘withdraw by nodejs’,
});
console.log(withdrawResult);
可以通过 blockchain explore 来查看进度.
完整的代码在这儿
