BumpAccountFee

BumpAccountFee attempts to bump the fee of an account's transaction through child-pays-for-parent (CPFP). Since the CPFP is performed through the backing lnd node, the account transaction must contain an output under its control for a successful bump. If a CPFP has already been performed for an account, and this RPC is invoked again, then a replacing transaction (RBF) of the child will be broadcast.

Source: poolrpc/trader.proto

gRPC

rpc BumpAccountFee (BumpAccountFeeRequest) returns (BumpAccountFeeResponse);

REST

HTTP Method	Path
POST	/v1/pool/accounts/bump

Code Samples

gRPC

Javascript

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

const GRPC_HOST = 'localhost:12010'
const MACAROON_PATH = 'POOL_DIR/regtest/pool.macaroon'
const TLS_PATH = 'POOL_DIR/tls.cert'

const loaderOptions = {
  keepCase: true,
  longs: String,
  enums: String,
  defaults: true,
  oneofs: true,
};
const packageDefinition = protoLoader.loadSync('poolrpc/trader.proto', loaderOptions);
const poolrpc = grpc.loadPackageDefinition(packageDefinition).poolrpc;
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 poolrpc.Trader(GRPC_HOST, creds);
let request = {
  trader_key: <bytes>,
  fee_rate_sat_per_kw: <uint64>,
};
client.bumpAccountFee(request, function(err, response) {
  console.log(response);
});
// Console output:
//  {
//  }

Python

import codecs, grpc, os
# Generate the following 2 modules by compiling the poolrpc/trader.proto with the grpcio-tools.
# See https://github.com/lightningnetwork/lnd/blob/master/docs/grpc/python.md for instructions.
import trader_pb2 as poolrpc, trader_pb2_grpc as traderstub

GRPC_HOST = 'localhost:12010'
MACAROON_PATH = 'POOL_DIR/regtest/pool.macaroon'
TLS_PATH = 'POOL_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 = traderstub.TraderStub(channel)
request = poolrpc.BumpAccountFeeRequest(
  trader_key=<bytes>,
  fee_rate_sat_per_kw=<uint64>,
)
response = stub.BumpAccountFee(request)
print(response)
# {
# }

REST

Javascript

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

const REST_HOST = 'localhost:8281'
const MACAROON_PATH = 'POOL_DIR/regtest/pool.macaroon'

let requestBody = {
  trader_key: <string>, // <bytes> (base64 encoded)
  fee_rate_sat_per_kw: <string>, // <uint64> 
};
let options = {
  url: `https://${REST_HOST}/v1/pool/accounts/bump`,
  // 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:8281'
MACAROON_PATH = 'POOL_DIR/regtest/pool.macaroon'
TLS_PATH = 'POOL_DIR/tls.cert'

url = f'https://{REST_HOST}/v1/pool/accounts/bump'
macaroon = codecs.encode(open(MACAROON_PATH, 'rb').read(), 'hex')
headers = {'Grpc-Metadata-macaroon': macaroon}
data = {
  'trader_key': base64.b64encode(<bytes>),
  'fee_rate_sat_per_kw': <uint64>,
}
r = requests.post(url, headers=headers, data=json.dumps(data), verify=TLS_PATH)
print(r.json())
# {
# }

Shell

$ pool accounts bumpfee --help

NAME:
   pool accounts bumpfee - bump the fee of an account in a pending state

USAGE:
   pool accounts bumpfee [command options] trader_key sat_per_vbyte

DESCRIPTION:
   
  This command allows users to bump the fee of an account's unconfirmed
  transaction through child-pays-for-parent (CPFP). Since the CPFP is
  performed through the backing lnd node, the account transaction must
  contain an output under its control for a successful bump. If a CPFP has
  already been performed for an account, and this RPC is invoked again,
  then a replacing transaction (RBF) of the child will be broadcast.
  

OPTIONS:
   --trader_key value     the trader key associated with the account to bump the fee of
   --sat_per_vbyte value  the fee rate expressed in sat/vbyte that should be used for the CPFP (default: 0)
   

Messages

poolrpc.BumpAccountFeeRequest

Source: poolrpc/trader.proto

Field	gRPC Type	REST Type	REST Placement
trader_key The trader key associated with the account that will have its fee bumped.	bytes	string	body
fee_rate_sat_per_kw The new fee rate, in satoshis per kw, to use for the child of the account transaction.	uint64	string	body

poolrpc.BumpAccountFeeResponse

Source: poolrpc/trader.proto

note

This response has no parameters.