AddAssetBuyOffer

AddAssetBuyOffer is used to add a buy offer for a specific asset. If a buy offer already exists for the asset, it will be updated.

A buy offer is used by the node to selectively accept or reject incoming asset sell quote requests before price is considered.

Source: rfqrpc/rfq.proto

gRPC

rpc AddAssetBuyOffer (AddAssetBuyOfferRequest) returns (AddAssetBuyOfferResponse);

REST

HTTP Method	Path
POST	/v1/taproot-assets/rfq/buyoffer/asset-id/{asset_specifier.asset_id_str}

Code Samples

gRPC

Javascript

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

const GRPC_HOST = 'localhost:10029'
const MACAROON_PATH = 'TAPROOT-ASSETS_DIR/regtest/taproot-assets.macaroon'
const TLS_PATH = 'TAPROOT-ASSETS_DIR/tls.cert'

const loaderOptions = {
  keepCase: true,
  longs: String,
  enums: String,
  defaults: true,
  oneofs: true,
};
const packageDefinition = protoLoader.loadSync('rfqrpc/rfq.proto', loaderOptions);
const rfqrpc = grpc.loadPackageDefinition(packageDefinition).rfqrpc;
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 rfqrpc.Rfq(GRPC_HOST, creds);
let request = {
  asset_specifier: <AssetSpecifier>,
  max_units: <uint64>,
};
client.addAssetBuyOffer(request, function(err, response) {
  console.log(response);
});
// Console output:
//  {
//  }

Python

import codecs, grpc, os
# Generate the following 2 modules by compiling the rfqrpc/rfq.proto with the grpcio-tools.
# See https://github.com/lightningnetwork/lnd/blob/master/docs/grpc/python.md for instructions.
import rfq_pb2 as rfqrpc, rfq_pb2_grpc as rfqstub

GRPC_HOST = 'localhost:10029'
MACAROON_PATH = 'TAPROOT-ASSETS_DIR/regtest/taproot-assets.macaroon'
TLS_PATH = 'TAPROOT-ASSETS_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 = rfqstub.RfqStub(channel)
request = rfqrpc.AddAssetBuyOfferRequest(
  asset_specifier=<AssetSpecifier>,
  max_units=<uint64>,
)
response = stub.AddAssetBuyOffer(request)
print(response)
# {
# }

REST

Javascript

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

const REST_HOST = 'localhost:8089'
const MACAROON_PATH = 'TAPROOT-ASSETS_DIR/regtest/taproot-assets.macaroon'

let requestBody = {
  asset_specifier: <object>, // <AssetSpecifier> 
  max_units: <string>, // <uint64> 
};
let options = {
  url: `https://${REST_HOST}/v1/taproot-assets/rfq/buyoffer/asset-id/{asset_specifier.asset_id_str}`,
  // 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:8089'
MACAROON_PATH = 'TAPROOT-ASSETS_DIR/regtest/taproot-assets.macaroon'
TLS_PATH = 'TAPROOT-ASSETS_DIR/tls.cert'

url = f'https://{REST_HOST}/v1/taproot-assets/rfq/buyoffer/asset-id/{asset_specifier.asset_id_str}'
macaroon = codecs.encode(open(MACAROON_PATH, 'rb').read(), 'hex')
headers = {'Grpc-Metadata-macaroon': macaroon}
data = {
  'asset_specifier': <AssetSpecifier>,
  'max_units': <uint64>,
}
r = requests.post(url, headers=headers, data=json.dumps(data), verify=TLS_PATH)
print(r.json())
# {
# }

Shell

# There is no CLI command for this RPC

Messages

rfqrpc.AddAssetBuyOfferRequest

Source: rfqrpc/rfq.proto

Field	gRPC Type	REST Type	REST Placement
asset_specifier asset_specifier is the subject asset. Nested REST Parameters asset_specifier.asset_id_str: string in path asset_specifier: object in body	AssetSpecifier	object	mixed
max_units max_units is the maximum amount of the asset to buy.	uint64	string	body

rfqrpc.AddAssetBuyOfferResponse

Source: rfqrpc/rfq.proto

note

This response has no parameters.

Nested Messages

rfqrpc.AssetSpecifier

Field	gRPC Type	REST Type
asset_id The 32-byte asset ID specified as raw bytes (gRPC only).	bytes	string
asset_id_str The 32-byte asset ID encoded as a hex string (use this for REST).	string	string
group_key The 32-byte asset group key specified as raw bytes (gRPC only).	bytes	string
group_key_str The 32-byte asset group key encoded as hex string (use this for REST).	string	string