SubscribeSendEvents
SubscribeSendEvents allows a caller to subscribe to send events for outgoing asset transfers.
Source: taprootassets.proto
gRPC
info
This is a server-streaming RPC
rpc SubscribeSendEvents (SubscribeSendEventsRequest) returns (stream SendEvent);
REST
HTTP Method | Path |
---|---|
POST | /v1/taproot-assets/events/asset-send |
Code Samples
- gRPC
- REST
- Shell
- Javascript
- Python
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('taprootassets.proto', loaderOptions);
const taprpc = grpc.loadPackageDefinition(packageDefinition).taprpc;
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 taprpc.TaprootAssets(GRPC_HOST, creds);
let request = {
filter_script_key: <bytes>,
};
let call = client.subscribeSendEvents(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.
});
// Console output:
// {
// "timestamp": <int64>,
// "send_state": <string>,
// "parcel_type": <ParcelType>,
// "addresses": <Addr>,
// "virtual_packets": <bytes>,
// "passive_virtual_packets": <bytes>,
// "anchor_transaction": <AnchorTransaction>,
// "transfer": <AssetTransfer>,
// "error": <string>,
// }
import codecs, grpc, os
# Generate the following 2 modules by compiling the taprootassets.proto with the grpcio-tools.
# See https://github.com/lightningnetwork/lnd/blob/master/docs/grpc/python.md for instructions.
import taprootassets_pb2 as taprpc, taprootassets_pb2_grpc as taprootassetsstub
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 = taprootassetsstub.TaprootAssetsStub(channel)
request = taprpc.SubscribeSendEventsRequest(
filter_script_key=<bytes>,
)
for response in stub.SubscribeSendEvents(request):
print(response)
# {
# "timestamp": <int64>,
# "send_state": <string>,
# "parcel_type": <ParcelType>,
# "addresses": <Addr>,
# "virtual_packets": <bytes>,
# "passive_virtual_packets": <bytes>,
# "anchor_transaction": <AnchorTransaction>,
# "transfer": <AssetTransfer>,
# "error": <string>,
# }
- Javascript
- Python
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 = {
filter_script_key: <string>, // <bytes> (base64 encoded)
};
let options = {
url: `https://${REST_HOST}/v1/taproot-assets/events/asset-send`,
// Work-around for self-signed certificates.
rejectUnauthorized: false,
json: true,
headers: {
'Grpc-Metadata-macaroon': fs.readFileSync(MACAROON_PATH).toString('hex'),
},
form: JSON.stringify(requestBody),
}
request.post(options, function(error, response, body) {
console.log(body);
});
// Console output:
// {
// "timestamp": <string>, // <int64>
// "send_state": <string>, // <string>
// "parcel_type": <string>, // <ParcelType>
// "addresses": <array>, // <Addr>
// "virtual_packets": <array>, // <bytes>
// "passive_virtual_packets": <array>, // <bytes>
// "anchor_transaction": <object>, // <AnchorTransaction>
// "transfer": <object>, // <AssetTransfer>
// "error": <string>, // <string>
// }
// --------------------------
// Example with websockets:
// --------------------------
const WebSocket = require('ws');
const fs = require('fs');
const REST_HOST = 'localhost:8089'
const MACAROON_PATH = 'TAPROOT-ASSETS_DIR/regtest/taproot-assets.macaroon'
let ws = new WebSocket(`wss://${REST_HOST}/v1/taproot-assets/events/asset-send?method=POST`, {
// Work-around for self-signed certificates.
rejectUnauthorized: false,
headers: {
'Grpc-Metadata-Macaroon': fs.readFileSync(MACAROON_PATH).toString('hex'),
},
});
let requestBody = {
filter_script_key: <bytes>, // <bytes> (base64 encoded)
};
ws.on('open', function() {
ws.send(JSON.stringify(requestBody));
});
ws.on('error', function(err) {
console.log('Error: ' + err);
});
ws.on('message', function(body) {
console.log(body);
});
// Console output:
// {
// "timestamp": <string>, // <int64>
// "send_state": <string>, // <string>
// "parcel_type": <string>, // <ParcelType>
// "addresses": <array>, // <Addr>
// "virtual_packets": <array>, // <bytes>
// "passive_virtual_packets": <array>, // <bytes>
// "anchor_transaction": <object>, // <AnchorTransaction>
// "transfer": <object>, // <AssetTransfer>
// "error": <string>, // <string>
// }
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/events/asset-send'
macaroon = codecs.encode(open(MACAROON_PATH, 'rb').read(), 'hex')
headers = {'Grpc-Metadata-macaroon': macaroon}
data = {
'filter_script_key': base64.b64encode(<bytes>),
}
r = requests.post(url, headers=headers, stream=True, data=json.dumps(data), verify=TLS_PATH)
for raw_response in r.iter_lines():
json_response = json.loads(raw_response)
print(json_response)
# {
# "timestamp": <int64>,
# "send_state": <string>,
# "parcel_type": <ParcelType>,
# "addresses": <Addr>,
# "virtual_packets": <bytes>,
# "passive_virtual_packets": <bytes>,
# "anchor_transaction": <AnchorTransaction>,
# "transfer": <AssetTransfer>,
# "error": <string>,
# }
$ tapcli events send --help
NAME:
tapcli events send - Subscribe to events around sending outbound assets
USAGE:
tapcli events send [command options] [arguments...]
DESCRIPTION:
Get live updates on the status of outbound asset transfers to the local node. This command will block until aborted manually by hitting Ctrl+C.
OPTIONS:
--script_key value (optional) the script key to receive events for; if not set, events for all transfers will be shown
Messages
taprpc.SubscribeSendEventsRequest
Source: taprootassets.proto
Field | gRPC Type | REST Type | REST Placement |
---|---|---|---|
filter_script_key | bytes | string | body |
taprpc.SendEvent
Source: taprootassets.proto
Field | gRPC Type | REST Type |
---|---|---|
timestamp | int64 | string |
send_state | string | string |
parcel_type | ParcelType | string |
addresses | Addr[] | array |
virtual_packets | bytes[] | array |
passive_virtual_packets | bytes[] | array |
anchor_transaction | AnchorTransaction | object |
transfer | AssetTransfer | object |
error | string | string |
Nested Messages
taprpc.Addr
Field | gRPC Type | REST Type |
---|---|---|
encoded | string | string |
asset_id | bytes | string |
asset_type | AssetType | string |
amount | uint64 | string |
group_key | bytes | string |
script_key | bytes | string |
internal_key | bytes | string |
tapscript_sibling | bytes | string |
taproot_output_key | bytes | string |
proof_courier_addr | string | string |
asset_version | AssetVersion | string |
address_version | AddrVersion | string |
taprpc.AnchorTransaction
Field | gRPC Type | REST Type |
---|---|---|
anchor_psbt | bytes | string |
change_output_index | int32 | integer |
chain_fees_sats | int64 | string |
target_fee_rate_sat_kw | int32 | integer |
lnd_locked_utxos | OutPoint[] | array |
final_tx | bytes | string |
taprpc.AssetTransfer
Field | gRPC Type | REST Type |
---|---|---|
transfer_timestamp | int64 | string |
anchor_tx_hash | bytes | string |
anchor_tx_height_hint | uint32 | integer |
anchor_tx_chain_fees | int64 | string |
inputs | TransferInput[] | array |
outputs | TransferOutput[] | array |
anchor_tx_block_hash | ChainHash | object |
taprpc.ChainHash
Field | gRPC Type | REST Type |
---|---|---|
hash | bytes | string |
hash_str | string | string |
taprpc.OutPoint
Field | gRPC Type | REST Type |
---|---|---|
txid | bytes | string |
output_index | uint32 | integer |
taprpc.TransferInput
Field | gRPC Type | REST Type |
---|---|---|
anchor_point | string | string |
asset_id | bytes | string |
script_key | bytes | string |
amount | uint64 | string |
taprpc.TransferOutput
Field | gRPC Type | REST Type |
---|---|---|
anchor | TransferOutputAnchor | object |
script_key | bytes | string |
script_key_is_local | bool | boolean |
amount | uint64 | string |
new_proof_blob | bytes | string |
split_commit_root_hash | bytes | string |
output_type | OutputType | string |
asset_version | AssetVersion | string |
lock_time | uint64 | string |
relative_lock_time | uint64 | string |
proof_delivery_status | ProofDeliveryStatus | string |
taprpc.TransferOutputAnchor
Field | gRPC Type | REST Type |
---|---|---|
outpoint | string | string |
value | int64 | string |
internal_key | bytes | string |
taproot_asset_root | bytes | string |
merkle_root | bytes | string |
tapscript_sibling | bytes | string |
num_passive_assets | uint32 | integer |
Enums
taprpc.AddrVersion
Name | Number |
---|---|
ADDR_VERSION_UNSPECIFIED | 0 |
ADDR_VERSION_V0 | 1 |
ADDR_VERSION_V1 | 2 |
taprpc.AssetType
Name | Number |
---|---|
NORMAL | 0 |
COLLECTIBLE | 1 |
taprpc.AssetVersion
Name | Number |
---|---|
ASSET_VERSION_V0 | 0 |
ASSET_VERSION_V1 | 1 |
taprpc.OutputType
Name | Number |
---|---|
OUTPUT_TYPE_SIMPLE | 0 |
OUTPUT_TYPE_SPLIT_ROOT | 1 |
taprpc.ParcelType
Name | Number |
---|---|
PARCEL_TYPE_ADDRESS | 0 |
PARCEL_TYPE_PRE_SIGNED | 1 |
PARCEL_TYPE_PENDING | 2 |
PARCEL_TYPE_PRE_ANCHORED | 3 |
taprpc.ProofDeliveryStatus
Name | Number |
---|---|
PROOF_DELIVERY_STATUS_NOT_APPLICABLE | 0 |
PROOF_DELIVERY_STATUS_COMPLETE | 1 |
PROOF_DELIVERY_STATUS_PENDING | 2 |