SettleInvoice

SettleInvoice settles an accepted invoice. If the invoice is already settled, this call will succeed.

Source: invoicesrpc/invoices.proto

gRPC

rpc SettleInvoice (SettleInvoiceMsg) returns (SettleInvoiceResp);

REST

HTTP Method	Path
POST	/v2/invoices/settle

Code Samples

gRPC

Javascript

const fs = require('fs');
const grpc = require('@grpc/grpc-js');
const protoLoader = require('@grpc/proto-loader');

const GRPC_HOST = 'localhost:10009'
const MACAROON_PATH = 'LND_DIR/data/chain/bitcoin/regtest/admin.macaroon'
const TLS_PATH = 'LND_DIR/tls.cert'

const loaderOptions = {
  keepCase: true,
  longs: String,
  enums: String,
  defaults: true,
  oneofs: true,
};
const packageDefinition = protoLoader.loadSync(['lightning.proto', 'invoicesrpc/invoices.proto'], loaderOptions);
const invoicesrpc = grpc.loadPackageDefinition(packageDefinition).invoicesrpc;
process.env.GRPC_SSL_CIPHER_SUITES = 'HIGH+ECDSA';
const tlsCert = fs.readFileSync(TLS_PATH);
const sslCreds = grpc.credentials.createSsl(tlsCert);
const macaroon = fs.readFileSync(MACAROON_PATH).toString('hex');
const macaroonCreds = grpc.credentials.createFromMetadataGenerator(function(args, callback) {
  let metadata = new grpc.Metadata();
  metadata.add('macaroon', macaroon);
  callback(null, metadata);
});
let creds = grpc.credentials.combineChannelCredentials(sslCreds, macaroonCreds);
let client = new invoicesrpc.Invoices(GRPC_HOST, creds);
let request = {
  preimage: <bytes>,
};
client.settleInvoice(request, function(err, response) {
  console.log(response);
});
// Console output:
//  {
//  }

Python

import codecs, grpc, os
# Generate the following 2 modules by compiling the invoicesrpc/invoices.proto with the grpcio-tools.
# See https://github.com/lightningnetwork/lnd/blob/master/docs/grpc/python.md for instructions.
import invoices_pb2 as invoicesrpc, invoices_pb2_grpc as invoicesstub

GRPC_HOST = 'localhost:10009'
MACAROON_PATH = 'LND_DIR/data/chain/bitcoin/regtest/admin.macaroon'
TLS_PATH = 'LND_DIR/tls.cert'

# create macaroon credentials
macaroon = codecs.encode(open(MACAROON_PATH, 'rb').read(), 'hex')
def metadata_callback(context, callback):
  callback([('macaroon', macaroon)], None)
auth_creds = grpc.metadata_call_credentials(metadata_callback)
# create SSL credentials
os.environ['GRPC_SSL_CIPHER_SUITES'] = 'HIGH+ECDSA'
cert = open(TLS_PATH, 'rb').read()
ssl_creds = grpc.ssl_channel_credentials(cert)
# combine macaroon and SSL credentials
combined_creds = grpc.composite_channel_credentials(ssl_creds, auth_creds)
# make the request
channel = grpc.secure_channel(GRPC_HOST, combined_creds)
stub = invoicesstub.InvoicesStub(channel)
request = invoicesrpc.SettleInvoiceMsg(
  preimage=<bytes>,
)
response = stub.SettleInvoice(request)
print(response)
# {
# }

REST

Javascript

const fs = require('fs');
const request = require('request');

const REST_HOST = 'localhost:8080'
const MACAROON_PATH = 'LND_DIR/data/chain/bitcoin/regtest/admin.macaroon'

let requestBody = {
  preimage: <string>, // <bytes> (base64 encoded)
};
let options = {
  url: `https://${REST_HOST}/v2/invoices/settle`,
  // Work-around for self-signed certificates.
  rejectUnauthorized: false,
  json: true,
  headers: {
    'Grpc-Metadata-macaroon': fs.readFileSync(MACAROON_PATH).toString('hex'),
  },
  form: JSON.stringify(requestBody),
}
request.post(options, function(error, response, body) {
  console.log(body);
});
// Console output:
//  {
//  }

Python

import base64, codecs, json, requests

REST_HOST = 'localhost:8080'
MACAROON_PATH = 'LND_DIR/data/chain/bitcoin/regtest/admin.macaroon'
TLS_PATH = 'LND_DIR/tls.cert'

url = f'https://{REST_HOST}/v2/invoices/settle'
macaroon = codecs.encode(open(MACAROON_PATH, 'rb').read(), 'hex')
headers = {'Grpc-Metadata-macaroon': macaroon}
data = {
  'preimage': base64.b64encode(<bytes>),
}
r = requests.post(url, headers=headers, data=json.dumps(data), verify=TLS_PATH)
print(r.json())
# {
# }

Shell

$ lncli settleinvoice --help

NAME:
   lncli settleinvoice - Reveal a preimage and use it to settle the corresponding invoice.

USAGE:
   lncli settleinvoice [command options] preimage

CATEGORY:
   Invoices

DESCRIPTION:
   
  Todo.

OPTIONS:
   --preimage value  the hex-encoded preimage (32 byte) which will allow settling an incoming HTLC payable to this preimage.
   

Messages

invoicesrpc.SettleInvoiceMsg

Source: invoicesrpc/invoices.proto

Field	gRPC Type	REST Type	REST Placement
preimage Externally discovered pre-image that should be used to settle the hold invoice.	bytes	string	body

invoicesrpc.SettleInvoiceResp

Source: invoicesrpc/invoices.proto

note

This response has no parameters.