SubscribeChannelGraph - 订阅通道图事件
SubscribeChannelGraph 创建一个流式RPC来支持调用者获取通道图拓扑的任何变化通知。 通知的事件包括:新节点上线、节点属性更新、新通道广播、通道路由策略更新等等。
gRPC请求 - GraphTopologySubscription
无字段。
gRPC响应 - GraphTopologyUpdate (Streaming)
字段如下:
- node_updates:NodeUpdate对象数组
- channel_updates:ChannelEdgeUpdate对象数组
- closed_chans:ClosedChannelUpdate对象数组
示例代码
Python示例代码
>>> import codecs, grpc, os
>>> import rpc_pb2 as ln, rpc_pb2_grpc as lnrpc
>>> macaroon = codecs.encode(open('LND_DIR/data/chain/bitcoin/simnet/admin.macaroon', 'rb').read(), 'hex')
>>> os.environ['GRPC_SSL_CIPHER_SUITES'] = 'HIGH+ECDSA'
>>> cert = open('LND_DIR/tls.cert', 'rb').read()
>>> ssl_creds = grpc.ssl_channel_credentials(cert)
>>> channel = grpc.secure_channel('localhost:10009', ssl_creds)
>>> stub = lnrpc.LightningStub(channel)
>>> request = ln.GraphTopologySubscription()
>>> for response in stub.SubscribeChannelGraph(request):
print(response)
{
"node_updates": <array NodeUpdate>,
"channel_updates": <array ChannelEdgeUpdate>,
"closed_chans": <array ClosedChannelUpdate>,
}
JavaScript示例代码
> var fs = require('fs');
> var grpc = require('grpc');
> var lnrpc = grpc.load('rpc.proto').lnrpc;
> process.env.GRPC_SSL_CIPHER_SUITES = 'HIGH+ECDSA'
> var lndCert = fs.readFileSync('LND_DIR/tls.cert');
> var sslCreds = grpc.credentials.createSsl(lndCert);
> var macaroonCreds = grpc.credentials.createFromMetadataGenerator(function(args, callback) {
var macaroon = fs.readFileSync("LND_DIR/data/chain/bitcoin/simnet/admin.macaroon").toString('hex');
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 request = {}
> var call = lightning.subscribeChannelGraph(request)
> call.on('data', function(response) {
// A response was received from the server.
console.log(response);
});
> call.on('status', function(status) {
// The current status of the stream.
});
> call.on('end', function() {
// The server has closed the stream.
});
{
"node_updates": <array NodeUpdate>,
"channel_updates": <array ChannelEdgeUpdate>,
"closed_chans": <array ClosedChannelUpdate>,
}