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Liana daemon API

lianad exposes a JSON-RPC 2.0 interface over a Unix Domain socket.

Commands must be sent as valid JSONRPC 2.0 requests, ending with a \n.

Command Description
stop Stops liana daemon
getinfo Get general information about the daemon
getnewaddress Get a new receiving address
listaddresses List addresses given start_index and count
listcoins List all wallet transaction outputs.
createspend Create a new Spend transaction
updatespend Store a created Spend transaction
listspendtxs List all stored Spend transactions
delspendtx Delete a stored Spend transaction
broadcastspend Finalize a stored Spend PSBT, and broadcast it
rbfpsbt Create a new RBF Spend transaction
startrescan Start rescanning the block chain from a given date
listconfirmed List of confirmed transactions of incoming and outgoing funds
listtransactions List of transactions with the given txids
createrecovery Create a recovery transaction to sweep expired coins
updatelabels Update the labels
getlabels Get the labels for the given addresses, txids and outpoints

Reference

General

stop

Stops the Liana daemon.

Response

Returns an empty response.

Field Type Description

getinfo

General information about the daemon

Request

This command does not take any parameter for now.

Field Type Description

Response

Field Type Description
version string Version following the SimVer format
network string Answer can be mainnet, testnet, regtest
block_height integer The block height we are synced at.
sync float The synchronization progress as percentage (0 < sync < 1)
descriptors object Object with the name of the descriptor as key and the descriptor string as value
rescan_progress float or null Progress of an ongoing rescan as a percentage (between 0 and 1) if there is any
timestamp integer Unix timestamp of wallet creation date

getnewaddress

Get a new address for receiving coins. This will always generate a new address regardless of whether it was used or not.

Request

This command does not take any parameter for now.

Field Type Description

Response

Field Type Description
address string A Bitcoin address
derivation_index integer The derivation index for this address

listaddresses

List receive and change addresses given start_index and count. Both arguments are optional. Default value for start_index is 0. If no value is passed for count the maximum generated index between receive and change is selected.

Request

Field Type Description
start_index integer(optional) Index of the first address to list
count integer(optional) Number of addresses to list

Response

Field Type Description
index integer Derivation index
receive string Receive address
change string Change address

listcoins

List all our transaction outputs, optionally filtered by status and/or outpoint.

Request

Field Type Description
statuses list of string List of statuses to filter coins by (see below).
outpoints list of string List of outpoints to filter coins by, as txid:vout.

A coin may have one of the following four statuses:

  • unconfirmed: deposit transaction has not yet been included in a block and coin has not been included in a spend transaction
  • confirmed: deposit transaction has been included in a block and coin has not been included in a spend transaction
  • spending: coin (whose deposit transaction may not yet have been confirmed) has been included in an unconfirmed spend transaction
  • spent: coin has been included in a confirmed spend transaction

Response

Field Type Description
address string Address containing the script pubkey of the coin
amount int Value of the TxO in satoshis.
derivation_index int Derivation index used to create the coin deposit address.
outpoint string Transaction id and output index of this coin.
block_height int or null Block height the transaction was confirmed at, or null.
spend_info object Information about the transaction spending this coin. See Spending transaction info.
is_immature bool Whether this coin was created by a coinbase transaction that is still immature.
is_change bool Whether the coin deposit address was derived from the change descriptor.
Spending transaction info
Field Type Description
txid str Spending transaction's id.
height int or null Block height the spending tx was included at, if confirmed.

createspend

Create a transaction spending one or more of our coins. All coins must exist and not be spent.

If no coins are specified in outpoints, they will be selected automatically from the set of confirmed coins together with any unconfirmed coins that are change outputs (see listcoins for coin status definitions).

Will error if the given coins are not sufficient to cover the transaction cost at 90% (or more) of the given feerate. If on the contrary the transaction is more than sufficiently funded, it will create a change output when economically rationale to do so.

You can create a send-to-self transaction by not specifying any destination. This command will create a single change output. This may be useful to "refresh" coins whose timelocked recovery path may be close to expiry without having to bear the complexity of computing the correct amount for the change output.

The optional change_address parameter allows the caller to specify what address to use for the leftover funds after all destinations have been set. This can be used to "sweep" the wallet: use all the unspent coins as input, set the other destination(s), if any, then set the change_address to the address of the wallet to sweep the funds to. Note however this output would only be created if there is enough remaining funds after sending to the specified destinations. This command WILL NOT ERROR if there isn't enough leftover funds to create the change/sweep output.

This command will refuse to create any output worth less than 5k sats.

Request

Field Type Description
destinations object Map from Bitcoin address to value.
outpoints list of string List of the coins to be spent, as txid:vout.
feerate integer Target feerate for the transaction, in satoshis per virtual byte.
change_address string Address to be used for leftover amount, if any.

Response

If the spend is created successfully, the following response will be received:

Field Type Description
psbt string PSBT of the spending transaction, encoded as base64.
warnings list of string Warnings, if any, generated during spend creation.

If there are insufficient funds to create the required spend, then the following response will be received:

Field Type Description
missing integer Additional sats required to create the spend.

updatespend

Store the PSBT of a Spend transaction in database, updating it if it already exists.

Will merge the partial signatures for all inputs if a PSBT for a transaction with the same txid exists in DB.

Request

Field Type Description
psbt string Base64-encoded PSBT of a Spend transaction.

Response

This command does not return anything for now.

Field Type Description

listspendtxs

List stored Spend transactions.

If txids is specified, only list transactions whose txid is in txids(empty list of txids is not allowed).

Request

Field Type Description
txids array of string (optional) Ids of the transactions to retrieve

Response

Field Type Description
spend_txs array Array of Spend tx entries
Spend tx entry
Field Type Description
psbt string Base64-encoded PSBT of the Spend transaction.
updated_at int or null UNIX timestamp of the last time this PSBT was updated.

delspendtx

Request

Field Type Description
txid string Hex encoded txid of the Spend transaction to delete

Response

This command does not return anything for now.

Field Type Description

broadcastspend

Request

Field Type Description
txid string Hex encoded txid of the Spend transaction to broadcast

Response

This command does not return anything for now.

Field Type Description

rbfpsbt

Create PSBT to replace the given transaction, which must point to a PSBT in our database, using RBF.

This command can be used to either:

  • "cancel" the transaction: the replacement will include at least one input from the previous transaction and will have only a single output (change).
  • bump the fee: the replacement will include all inputs from the previous transaction and all non-change outputs will be kept the same, with only the change amount being modified as required.

In both cases, the replacement transaction may include additional confirmed coins as inputs if required in order to pay the higher fee (this applies also when replacing a self-send).

If the transaction includes a change output to one of our own change addresses, this same address will be used for change in the replacement transaction, if required.

If the transaction pays to more than one of our change addresses, then the one receiving the highest value will be used as a change address in the replacement and the others will be treated as non-change outputs (i.e. removed for cancel or otherwise kept the same).

If feerate is not passed to the command, the target feerate of the replacement will be set to the minimum value allowed in order to replace this transaction using RBF (see https://github.com/bitcoin/bitcoin/blob/master/doc/policy/mempool-replacements.md#current-replace-by-fee-policy for further details about this and other conditions that must be satisfied when using RBF).

Request

Field Type Description
txid string Hex encoded txid of the Spend transaction to be replaced.
is_cancel bool Whether to "cancel" the transaction or simply bump the fee.
feerate integer(optional) Target feerate for the RBF transaction (in sat/vb).

Response

The response is the same as for createspend.

startrescan

Request

Field Type Description
timestamp int Date to start rescanning from, as a UNIX timestamp

Response

This command does not return anything for now.

Field Type Description

listconfirmed

listconfirmed retrieves a paginated and ordered list of transactions that were confirmed within a given time window. Confirmation time is based on the timestamp of blocks.

Request

Field Type Description
start int Inclusive lower bound of the time window
end int Inclusive upper bound of the time window
limit int Maximum number of transactions to retrieve

Response

Field Type Description
transactions array Array of Transaction resource
Transaction Resource
Field Type Description
height int or null Block height of the transaction, null if the transaction is unconfirmed
time int or null Block time of the transaction, null if the transaction is unconfirmed
tx string hex encoded bitcoin transaction

listtransactions

listtransactions retrieves the transactions with the given txids.

Request

Field Type Description
txids array of string Ids of the transactions to retrieve

Response

Field Type Description
transactions array Array of Transaction resource

createrecovery

Create a transaction that sweeps all coins for which a timelocked recovery path is currently available to a provided address with the provided feerate.

The timelock parameter can be used to specify which recovery path to use. By default, we'll use the first recovery path available. If created for a later timelock a recovery transaction may be satisfied using an earlier timelock but not the opposite.

Due to the fact coins are generally received at different block heights, not all coins may be spendable through a single recovery path at the same time.

This command will error if no such coins are available or the sum of their value is not enough to cover the requested feerate.

Request

Field Type Description
address str The Bitcoin address to sweep the coins to.
feerate integer Target feerate for the transaction, in satoshis per virtual byte.
timelock int or null Recovery path to be used, identified by the number of blocks after which it is available.

Response

Field Type Description
psbt string PSBT of the recovery transaction, encoded as base64.

updatelabels

Update the labels from a given map of key/value, with the labelled bitcoin addresses, txids and outpoints as keys and the label as value. If a label already exists for the given item, the new label overrides the previous one. If a null value is passed, the label is deleted.

Request

Field Type Description
labels object A mapping from an item to be labelled (an address, a txid or an outpoint) to a label string (at most 100 chars long).

getlabels

Retrieve a map of items and their respective labels from a list of addresses, txids and outpoints. Items without labels are not present in the response map.

Request

Field Type Description
items string array Items (address, txid or outpoint) of which to fetch the label.

Response

Field Type Description
labels object A mapping of bitcoin addresses, txids and outpoints as keys, and string as values