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40 lines
1.3 KiB
40 lines
1.3 KiB
import grpc from 'grpc'
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import config from '../config'
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import { getDeadline, validateHost, createSslCreds, createMacaroonCreds } from './util'
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/**
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* Creates an LND grpc client lightning service.
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* @returns {rpc.lnrpc.Lightning}
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*/
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const lightning = async () => {
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const lndConfig = config.lnd()
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const { host, rpcProtoPath, cert, macaroon } = lndConfig
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// Verify that the host is valid before creating a gRPC client that is connected to it.
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return await validateHost(host).then(async () => {
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// Load the gRPC proto file.
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const rpc = grpc.load(rpcProtoPath)
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// Create ssl and macaroon credentials to use with the gRPC client.
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const [sslCreds, macaroonCreds] = await Promise.all([
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createSslCreds(cert),
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createMacaroonCreds(macaroon)
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])
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const credentials = grpc.credentials.combineChannelCredentials(sslCreds, macaroonCreds)
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// Create a new gRPC client instance.
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const lnd = new rpc.lnrpc.Lightning(host, credentials)
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// Call the getInfo method to ensure that we can make successful calls to the gRPC interface.
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return new Promise((resolve, reject) => {
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lnd.getInfo({}, { deadline: getDeadline(2) }, err => {
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if (err) {
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return reject(err)
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}
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return resolve(lnd)
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})
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})
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})
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}
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export default lightning
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