[BITCOIN] Lightning Network toàn thư – hồi 2 : Giao tiếp với lightning network bằng gRPC !!!

Thứ Ba, 19/11/2019

Tram Ho

Trong phần này, chúng ta sẽ tìm hiểu cách thiết lập và tương tác với lnd thông qua giao thức gRPC . Trước khi bắt đầu bước này , hãy đảm bảo bạn đã cài đặt btcd và lnd các bạn có thể xem ở đây và ngoài ra là node và npm nhé .
Tài liệu tham khảo tại đây , đây là web về docs API cho lncli (CLI) có thể tương tác bằng Python và JavaScript giao tiếp với local LND thông qua gRPC. Nó dành cho những người đã hiểu LND các bạn có thể đọc tại đây. Ngoài ra LND cũng cung cấp một phương thức tương tác vs LND khác đó là REST các bạn có thể đọc tại đây

Các ví dụ dưới đây giả định rằng đang chạy LND local và kết nối cổng gRPC ở cổng 10009.
File rpc.proto có thể download tại đây

Init wallet

Mình sẽ sử dụng repo của mình đã setup đầy đủ hết môi trường docker các bạn có thể clone tại https://github.com/vinhyenvodoi98/LightningNetwork-Nodejs

Lướt qua nhanh các bước để start 1 mạng LND nào
bạn chỉ cần chạy lệnh

scripts/simnet-env.sh

1 2	scripts/simnet-env.sh

Sau khi chạy lệnh này xong một chúng sẽ tạo ra :

một mạng bitcoin simnet
3 Bitcoin LND node (đồng thời đã kết nối các peer giữa các node)

Chú thích: đặt tên 3 node này là alice, bob, charlie và chúng ta sẽ thao tác với node alice trong bài viết này

Sau đó để có biến môi trường chúng ta cần chạy

scripts/simnet-env.sh

1 2	scripts/simnet-env.sh

cop phần LND_MACAROON và LND_CERT của Alice vào file .env

Setting gRPC

Chúng ta sử dụng đoạn code này để setup connet bằng gRPC

<span class="token function">require</span><span class="token punctuation">(</span><span class="token string">"dotenv"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">config</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> grpc <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">"grpc"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> protoLoader <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">"@grpc/proto-loader"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token keyword">const</span> packageDefinition <span class="token operator">=</span> protoLoader<span class="token punctuation">.</span><span class="token function">loadSync</span><span class="token punctuation">(</span><span class="token string">"./rpc.proto"</span><span class="token punctuation">,</span> <span class="token punctuation">{</span>
  keepCase<span class="token punctuation">:</span> <span class="token boolean">true</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> lnrpc <span class="token operator">=</span> grpc<span class="token punctuation">.</span><span class="token function">loadPackageDefinition</span><span class="token punctuation">(</span>packageDefinition<span class="token punctuation">)</span><span class="token punctuation">.</span>lnrpc<span class="token punctuation">;</span>

process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">GRPC_SSL_CIPHER_SUITES</span> <span class="token operator">=</span> <span class="token string">"HIGH+ECDSA"</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> lndCert <span class="token operator">=</span> Buffer<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">(</span>process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">LND_CERT</span><span class="token punctuation">,</span> <span class="token string">"utf8"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> sslCreds <span class="token operator">=</span> grpc<span class="token punctuation">.</span>credentials<span class="token punctuation">.</span><span class="token function">createSsl</span><span class="token punctuation">(</span>lndCert<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token keyword">var</span> macaroonCreds <span class="token operator">=</span> grpc<span class="token punctuation">.</span>credentials<span class="token punctuation">.</span><span class="token function">createFromMetadataGenerator</span><span class="token punctuation">(</span><span class="token keyword">function</span><span class="token punctuation">(</span>
  args<span class="token punctuation">,</span>
  callback
<span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">var</span> macaroon <span class="token operator">=</span> process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">LND_MACAROON</span><span class="token punctuation">;</span>
  <span class="token keyword">var</span> metadata <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">grpc<span class="token punctuation">.</span>Metadata</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
  metadata<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token string">"macaroon"</span><span class="token punctuation">,</span> macaroon<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token function">callback</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">,</span> metadata<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token keyword">var</span> creds <span class="token operator">=</span> grpc<span class="token punctuation">.</span>credentials<span class="token punctuation">.</span><span class="token function">combineChannelCredentials</span><span class="token punctuation">(</span>sslCreds<span class="token punctuation">,</span> macaroonCreds<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> lightning <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">lnrpc<span class="token punctuation">.</span>Lightning</span><span class="token punctuation">(</span><span class="token string">"localhost:10009"</span><span class="token punctuation">,</span> creds<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token keyword">var</span> creds <span class="token operator">=</span> grpc<span class="token punctuation">.</span>credentials<span class="token punctuation">.</span><span class="token function">combineChannelCredentials</span><span class="token punctuation">(</span>sslCreds<span class="token punctuation">,</span> macaroonCreds<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">var</span> lightning <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">lnrpc<span class="token punctuation">.</span>Lightning</span><span class="token punctuation">(</span><span class="token string">'localhost:10001'</span><span class="token punctuation">,</span> creds<span class="token punctuation">)</span><span class="token punctuation">;</span>

require("dotenv").config();

var grpc = require("grpc");

var protoLoader = require("@grpc/proto-loader");

const packageDefinition = protoLoader.loadSync("./rpc.proto", {

keepCase: true

});

const lnrpc = grpc.loadPackageDefinition(packageDefinition).lnrpc;

process.env.GRPC_SSL_CIPHER_SUITES = "HIGH+ECDSA";

var lndCert = Buffer.from(process.env.LND_CERT, "utf8");

var sslCreds = grpc.credentials.createSsl(lndCert);

var macaroonCreds = grpc.credentials.createFromMetadataGenerator(function(

args,

callback

) {

var macaroon = process.env.LND_MACAROON;

var metadata = new grpc.Metadata();

metadata.add("macaroon", macaroon);

callback(null, metadata);

});

var creds = grpc.credentials.combineChannelCredentials(sslCreds, macaroonCreds);

var lightning = new lnrpc.Lightning("localhost:10009", creds);

});

var lightning = new lnrpc.Lightning('localhost:10001', creds);

Test thử một chút với hàm getinfo nhỉ :

  <span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
  lightning<span class="token punctuation">.</span><span class="token function">getInfo</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>err<span class="token punctuation">,</span> response<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
  
  <span class="token comment">//ket qua</span>
  <span class="token punctuation">{</span> 
      identity_pubkey<span class="token punctuation">:</span>
           <span class="token string">'02b91a3e09cc9e207aea58a6a172b94fd6946cc7f364b13b9419c17fee56b6dca1'</span><span class="token punctuation">,</span>
      alias<span class="token punctuation">:</span> <span class="token string">'02b91a3e09cc9e207aea'</span><span class="token punctuation">,</span>
      num_peers<span class="token punctuation">:</span> <span class="token number">2</span><span class="token punctuation">,</span>
      block_height<span class="token punctuation">:</span> <span class="token number">2040</span><span class="token punctuation">,</span>
      block_hash<span class="token punctuation">:</span>
           <span class="token string">'789f790ed8190bb034ec1b8cbafda3b9db0ebfb743d67b1c3b35f4177fdebcb2'</span><span class="token punctuation">,</span>
      synced_to_chain<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
      uris<span class="token punctuation">:</span>
           <span class="token punctuation">[</span> <span class="token string">'02b<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="95aca4f4a6f0a5acf6f6acf0a7a5a2f4f0f4a0adf4a3f4a4a2a7f7aca1f3f1a3aca1a3f6f6a2f3a6a3a1f7a4a6f7aca1a4acf6a4a2f3f0f0a0a3f7a3f1f6f4a4d5">[email protected]</a>172.26.0.3:9735'</span> <span class="token punctuation">]</span><span class="token punctuation">,</span>
      best_header_timestamp<span class="token punctuation">:</span> Long <span class="token punctuation">{</span> low<span class="token punctuation">:</span> <span class="token number">1573662914</span><span class="token punctuation">,</span> high<span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">,</span> unsigned<span class="token punctuation">:</span> <span class="token boolean">false</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
      version<span class="token punctuation">:</span> <span class="token string">'0.8.0-beta commit=v0.8.0-beta'</span><span class="token punctuation">,</span>
      chains<span class="token punctuation">:</span> <span class="token punctuation">[</span> <span class="token punctuation">{</span> chain<span class="token punctuation">:</span> <span class="token string">'bitcoin'</span><span class="token punctuation">,</span> network<span class="token punctuation">:</span> <span class="token string">'simnet'</span> <span class="token punctuation">}</span> <span class="token punctuation">]</span><span class="token punctuation">,</span>
      color<span class="token punctuation">:</span> <span class="token string">'#3399ff'</span><span class="token punctuation">,</span>
      synced_to_graph<span class="token punctuation">:</span> <span class="token boolean">true</span> 
  <span class="token punctuation">}</span>

var request = {};

lightning.getInfo(request, function(err, response) {

console.log(response);

});

//ket qua

{

identity_pubkey:

'02b91a3e09cc9e207aea58a6a172b94fd6946cc7f364b13b9419c17fee56b6dca1',

alias: '02b91a3e09cc9e207aea',

num_peers: 2,

block_height: 2040,

block_hash:

'789f790ed8190bb034ec1b8cbafda3b9db0ebfb743d67b1c3b35f4177fdebcb2',

synced_to_chain: true,

uris:

[ '02b<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="95aca4f4a6f0a5acf6f6acf0a7a5a2f4f0f4a0adf4a3f4a4a2a7f7aca1f3f1a3aca1a3f6f6a2f3a6a3a1f7a4a6f7aca1a4acf6a4a2f3f0f0a0a3f7a3f1f6f4a4d5">[email protected]</a>172.26.0.3:9735' ],

best_header_timestamp: Long { low: 1573662914, high: 0, unsigned: false },

version: '0.8.0-beta commit=v0.8.0-beta',

chains: [ { chain: 'bitcoin', network: 'simnet' } ],

color: '#3399ff',

synced_to_graph: true

}

Get walletbalance

<span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token punctuation">}</span> 
lightning<span class="token punctuation">.</span><span class="token function">walletBalance</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>err<span class="token punctuation">,</span> response<span class="token punctuation">)</span> <span class="token punctuation">{</span>
  console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token comment">// ket qua tra ve o dang long nen ban nen su dung ham BigInt cua js nhe</span>

var request = {}

lightning.walletBalance(request, function(err, response) {

})

// ket qua tra ve o dang long nen ban nen su dung ham BigInt cua js nhe

Kiểm tra các peer

<span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
  lightning<span class="token punctuation">.</span><span class="token function">listPeers</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>err<span class="token punctuation">,</span> response<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// ket qua</span>
<span class="token punctuation">{</span> peers<span class="token punctuation">:</span>
   <span class="token punctuation">[</span> <span class="token punctuation">{</span> pub_key<span class="token punctuation">:</span>
        <span class="token string">'02d61e6b1e69f56e1be75fc270abdb9daade494df32ce4b7bb008a0caed5e4bb3c'</span><span class="token punctuation">,</span>
       address<span class="token punctuation">:</span> <span class="token string">'172.26.0.4:9735'</span><span class="token punctuation">,</span>
       bytes_sent<span class="token punctuation">:</span> <span class="token punctuation">[</span>Long<span class="token punctuation">]</span><span class="token punctuation">,</span>
       bytes_recv<span class="token punctuation">:</span> <span class="token punctuation">[</span>Long<span class="token punctuation">]</span><span class="token punctuation">,</span>
       ping_time<span class="token punctuation">:</span> <span class="token punctuation">[</span>Long<span class="token punctuation">]</span><span class="token punctuation">,</span>
       sync_type<span class="token punctuation">:</span> <span class="token number">1</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
     <span class="token punctuation">{</span> pub_key<span class="token punctuation">:</span>
        <span class="token string">'02c9c7b15e75e9c33671fd6c82d8218f5b4dca825c7d831c77902b941330da04c9'</span><span class="token punctuation">,</span>
       address<span class="token punctuation">:</span> <span class="token string">'172.26.0.5:37356'</span><span class="token punctuation">,</span>
       bytes_sent<span class="token punctuation">:</span> <span class="token punctuation">[</span>Long<span class="token punctuation">]</span><span class="token punctuation">,</span>
       bytes_recv<span class="token punctuation">:</span> <span class="token punctuation">[</span>Long<span class="token punctuation">]</span><span class="token punctuation">,</span>
       inbound<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
       ping_time<span class="token punctuation">:</span> <span class="token punctuation">[</span>Long<span class="token punctuation">]</span><span class="token punctuation">,</span>
       sync_type<span class="token punctuation">:</span> <span class="token number">1</span> <span class="token punctuation">}</span> 
    <span class="token punctuation">]</span> 
<span class="token punctuation">}</span>

lightning.listPeers(request, function(err, response) {

});

// ket qua

{ peers:

[ { pub_key:

'02d61e6b1e69f56e1be75fc270abdb9daade494df32ce4b7bb008a0caed5e4bb3c',

address: '172.26.0.4:9735',

bytes_sent: [Long],

bytes_recv: [Long],

ping_time: [Long],

sync_type: 1 },

{ pub_key:

'02c9c7b15e75e9c33671fd6c82d8218f5b4dca825c7d831c77902b941330da04c9',

address: '172.26.0.5:37356',

bytes_sent: [Long],

bytes_recv: [Long],

inbound: true,

ping_time: [Long],

sync_type: 1 }

]

}

Tạo Channel

<span class="token keyword">var</span> pubkey <span class="token operator">=</span>
    <span class="token string">"02d61e6b1e69f56e1be75fc270abdb9daade494df32ce4b7bb008a0caed5e4bb3c"</span><span class="token punctuation">;</span> <span class="token comment">//public key mình đã lấy cua 1 peer ben tren</span>
  <span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token punctuation">{</span>
    node_pubkey_string<span class="token punctuation">:</span> pubkey<span class="token punctuation">,</span>
    local_funding_amount<span class="token punctuation">:</span> <span class="token number">5000000</span><span class="token punctuation">,</span>
    push_sat<span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
    target_conf<span class="token punctuation">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
    <span class="token keyword">private</span><span class="token punctuation">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
    min_confs<span class="token punctuation">:</span> <span class="token number">3</span><span class="token punctuation">,</span>
    spend_unconfirmed<span class="token punctuation">:</span> <span class="token boolean">false</span>
  <span class="token punctuation">}</span><span class="token punctuation">;</span>
  lightning<span class="token punctuation">.</span><span class="token function">openChannelSync</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>err<span class="token punctuation">,</span> response<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

var pubkey =

"02d61e6b1e69f56e1be75fc270abdb9daade494df32ce4b7bb008a0caed5e4bb3c"; //public key mình đã lấy cua 1 peer ben tren

var request = {

node_pubkey_string: pubkey,

local_funding_amount: 5000000,

push_sat: 0,

target_conf: 1,

private: false,

min_confs: 3,

spend_unconfirmed: false

};

lightning.openChannelSync(request, function(err, response) {

});

Bây giờ chúng ta cần khai thác 5 khối để kênh được coi là hợp lệ :

docker-compose run simnet-btcctl generate 5 &gt; /dev/null

1 2	docker-compose run simnet-btcctl generate 5 > /dev/null

Chú ý việc tạo kênh ở đây là tạo kênh 1 hướng nghĩa là khi kênh đc tạo ra thì sẽ chỉ có ng tạo nạp tiền vào kênh thôi . Đây đc gọi là single-funded channel còn kênh được tạo ra với 2 người đều nạp tiền vào được gọi là mutually funded channels và bên phát triển LND vào những bản cập nhật tiếp theo . Có một số giải pháp được đề xuất các bạn có thể đọc tại đây :
https://bitcoin.stackexchange.com/questions/80792/how-to-create-bidirectional-channels-using-lnd

Thực hiện giao dịch giữa các channel

Tạo một hóa đơn


 <span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token punctuation">{</span>
    amt_paid<span class="token punctuation">:</span> <span class="token number">10000</span>
  <span class="token punctuation">}</span><span class="token punctuation">;</span>
  lightning<span class="token punctuation">.</span><span class="token function">addInvoice</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>err<span class="token punctuation">,</span> response<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">//ket qua</span>

r_hash<span class="token punctuation">:</span>
   <span class="token operator">&lt;</span>Buffer <span class="token number">9</span>b <span class="token number">45</span> <span class="token number">92</span> <span class="token number">99</span> d6 eb <span class="token number">5</span>f <span class="token number">47</span> <span class="token number">80</span> <span class="token number">81</span> <span class="token number">51</span> ba <span class="token number">54</span> f1 <span class="token number">29</span> <span class="token number">4</span>b <span class="token number">39</span> <span class="token number">11</span> <span class="token number">34</span> <span class="token number">56</span> <span class="token number">64</span> <span class="token number">02</span> <span class="token number">41</span> d2 c8 a3 <span class="token number">8</span>f <span class="token number">31</span> dd <span class="token number">84</span> <span class="token number">9</span>e <span class="token number">2</span>e<span class="token operator">&gt;</span><span class="token punctuation">,</span>
  payment_request<span class="token punctuation">:</span>
   <span class="token string">'lnsb1pwuc0q7pp5ndze9xwkad050qyp2xa9fufffvu3zdzkvspyr5kg5w8nrhvynchqdqqcqzpgdeu379ry7ceatpsmguqhpj988wsta6vuka44kqr2zjyth0jyrnfyazekukh25glnkd9tdlpnsecwmawue7edxv5s8gnnxpg499fm3lqp6spfxw'</span><span class="token punctuation">,</span>
  add_index<span class="token punctuation">:</span> Long <span class="token punctuation">{</span> low<span class="token punctuation">:</span> <span class="token number">1</span><span class="token punctuation">,</span> high<span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">,</span> unsigned<span class="token punctuation">:</span> <span class="token boolean">true</span> <span class="token punctuation">}</span> <span class="token punctuation">}</span>

var request = {

amt_paid: 10000

};

lightning.addInvoice(request, function(err, response) {

});

//ket qua

r_hash:

<Buffer 9b 45 92 99 d6 eb 5f 47 80 81 51 ba 54 f1 29 4b 39 11 34 56 64 02 41 d2 c8 a3 8f 31 dd 84 9e 2e>,

payment_request:

'lnsb1pwuc0q7pp5ndze9xwkad050qyp2xa9fufffvu3zdzkvspyr5kg5w8nrhvynchqdqqcqzpgdeu379ry7ceatpsmguqhpj988wsta6vuka44kqr2zjyth0jyrnfyazekukh25glnkd9tdlpnsecwmawue7edxv5s8gnnxpg499fm3lqp6spfxw',

add_index: Long { low: 1, high: 0, unsigned: true } }

Chúng ta lấy payment_request rồi gửi thanh toán trong lênh của alice -> bob

Tạo thanh toán

Chúng ta chạy commad đối vs node của bob

docker<span class="token operator">-</span>compose exec simnet<span class="token operator">-</span>lnd<span class="token operator">-</span>btcd<span class="token operator">-</span>bob lncli <span class="token operator">--</span>macaroonpath<span class="token operator">=</span><span class="token operator">~</span><span class="token operator">/</span><span class="token punctuation">.</span>lnd<span class="token operator">/</span>data<span class="token operator">/</span>chain<span class="token operator">/</span>bitcoin<span class="token operator">/</span>simnet<span class="token operator">/</span>admin<span class="token punctuation">.</span>macaroon sendpayment <span class="token operator">--</span>pay_req<span class="token operator">=</span><span class="token operator">&lt;</span>payment_request<span class="token operator">&gt;</span>

docker-compose exec simnet-lnd-btcd-bob lncli --macaroonpath=~/.lnd/data/chain/bitcoin/simnet/admin.macaroon sendpayment --pay_req=<payment_request>

payment_request lấy ở bên trên nhé .
sau đó chúng ta sẽ xác nhận

Confirm payment (yes / no) yes

1 2	Confirm payment (yes / no) yes

Là hoàn thành rồi

Đóng Channel

<span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token punctuation">{</span>
    channel_point<span class="token punctuation">:</span> <span class="token punctuation">{</span>
      funding_txid_str<span class="token punctuation">:</span>
        <span class="token string">"229e6fbbe4942c1e405fdf50c55174a609440fb39f20e822eec34286aadab098"</span><span class="token punctuation">,</span>
      output_index<span class="token punctuation">:</span> <span class="token number">0</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span><span class="token punctuation">;</span>
  <span class="token keyword">var</span> call <span class="token operator">=</span> lightning<span class="token punctuation">.</span><span class="token function">closeChannel</span><span class="token punctuation">(</span>request<span class="token punctuation">)</span><span class="token punctuation">;</span>
  call<span class="token punctuation">.</span><span class="token function">on</span><span class="token punctuation">(</span><span class="token string">"data"</span><span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

var request = {

channel_point: {

funding_txid_str:

"229e6fbbe4942c1e405fdf50c55174a609440fb39f20e822eec34286aadab098",

output_index: 0

}

};

var call = lightning.closeChannel(request);

call.on("data", function(response) {

});

Phụ Lục

Bạn có thể tự tạo 1 node bên ngoài hoặc start thêm 1 container nữa rồi connect với các node còn lại rồi tạo channel giống như trên .

Creating the P2P Network

Bây h 2 tài khoản đã có một số Bitcoin trên mạng simnet rồi hãy kết nối 2 tài khoản đấy vs nhau nào

Chúng ta lấy public Key của Alice và biết được port của Alice là 10012

<span class="token keyword">var</span> <span class="token function-variable function">getInfo</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
  <span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
  lightning<span class="token punctuation">.</span><span class="token function">getInfo</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>err<span class="token punctuation">,</span> response<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>

<span class="token comment">//Kết quả</span>
<span class="token punctuation">{</span> 
    <span class="token string">"identity_pubkey"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>string<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"alias"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>string<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"num_pending_channels"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>uint32<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"num_active_channels"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>uint32<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"num_peers"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>uint32<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"block_height"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>uint32<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"block_hash"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>string<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"synced_to_chain"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>bool<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"testnet"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>bool<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"uris"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>array string<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"best_header_timestamp"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>int64<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"version"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>string<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"num_inactive_channels"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>uint32<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"chains"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>array Chain<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"color"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>string<span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token string">"synced_to_graph"</span><span class="token punctuation">:</span> <span class="token operator">&lt;</span>bool<span class="token operator">&gt;</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span>

var getInfo = () => {

});

};

//Kết quả

{

"identity_pubkey": <string>,

"alias": <string>,

"num_pending_channels": <uint32>,

"num_active_channels": <uint32>,

"num_peers": <uint32>,

"block_height": <uint32>,

"block_hash": <string>,

"synced_to_chain": <bool>,

"testnet": <bool>,

"uris": <array string>,

"best_header_timestamp": <int64>,

"version": <string>,

"num_inactive_channels": <uint32>,

"chains": <array Chain>,

"color": <string>,

"synced_to_graph": <bool>,

}

Trong đó identity_pubkey là Public key của mình

Connect peer

<span class="token keyword">var</span> <span class="token function-variable function">connectPeer</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
  <span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token punctuation">{</span>
    addr<span class="token punctuation">:</span> <span class="token punctuation">{</span>
      pubkey<span class="token punctuation">:</span> <span class="token string">'030074bd051c3399de6d1f980b4f8bd2b4e6b73bb276049ebf9e6944187f5a5886'</span><span class="token punctuation">,</span>
      host<span class="token punctuation">:</span> <span class="token string">'localhost:10012'</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    perm<span class="token punctuation">:</span> <span class="token boolean">true</span>
  <span class="token punctuation">}</span><span class="token punctuation">;</span>
  lightning<span class="token punctuation">.</span><span class="token function">connectPeer</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>err<span class="token punctuation">,</span> response<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>

var connectPeer = () => {

var request = {

addr: {

pubkey: '030074bd051c3399de6d1f980b4f8bd2b4e6b73bb276049ebf9e6944187f5a5886',

host: 'localhost:10012'

},

perm: true

};

lightning.connectPeer(request, function(err, response) {

});

};

sau đó chúng ta có thể check peer

<span class="token keyword">var</span> <span class="token function-variable function">checkPeer</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=&gt;</span> <span class="token punctuation">{</span>
  <span class="token keyword">var</span> request <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
  lightning<span class="token punctuation">.</span><span class="token function">listPeers</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span>err<span class="token punctuation">,</span> response<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>response<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token comment">// Ket qua</span>
<span class="token punctuation">{</span> peers<span class="token punctuation">:</span>
   <span class="token punctuation">[</span> <span class="token punctuation">{</span> pubKey<span class="token punctuation">:</span>
        <span class="token string">'030074bd051c3399de6d1f980b4f8bd2b4e6b73bb276049ebf9e6944187f5a5886'</span><span class="token punctuation">,</span>
       address<span class="token punctuation">:</span> <span class="token string">'127.0.0.1:10012'</span><span class="token punctuation">,</span>
       bytesSent<span class="token punctuation">:</span> <span class="token punctuation">[</span>Long<span class="token punctuation">]</span><span class="token punctuation">,</span>
       bytesRecv<span class="token punctuation">:</span> <span class="token punctuation">[</span>Long<span class="token punctuation">]</span><span class="token punctuation">,</span>
       pingTime<span class="token punctuation">:</span> <span class="token punctuation">[</span>Long<span class="token punctuation">]</span><span class="token punctuation">,</span>
       syncType<span class="token punctuation">:</span> <span class="token number">1</span> 
       <span class="token punctuation">}</span> 
   <span class="token punctuation">]</span> 
<span class="token punctuation">}</span>

var checkPeer = () => {

});

};

// Ket qua

{ peers:

[ { pubKey:

'030074bd051c3399de6d1f980b4f8bd2b4e6b73bb276049ebf9e6944187f5a5886',

address: '127.0.0.1:10012',

bytesSent: [Long],

bytesRecv: [Long],

pingTime: [Long],

syncType: 1

}

]

}

Như vậy chúng ta đã kết nối được với Alice rồi.

tài liệu tham khảo :

https://github.com/RadarTech/ln-api-boilerplate#simnet-suite

https://api.lightning.community/#lnd-grpc-api-reference

Chia sẻ bài viết ngay

Nguồn bài viết : Viblo

[BITCOIN] Lightning Network toàn thư – hồi 2 : Giao tiếp với lightning network bằng gRPC !!!

Init wallet

Setting gRPC

Tạo Channel

Thực hiện giao dịch giữa các channel

Tạo một hóa đơn

Tạo thanh toán

Đóng Channel

Phụ Lục

Creating the P2P Network

Connect peer

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