core-lightning/doc/lightning-utxopsbt.7.md
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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2020-08-25 12:53:13 +09:30

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Markdown

lightning-utxopsbt -- Command to populate PSBT inputs from given UTXOs
================================================================
SYNOPSIS
--------
**utxopsbt** *satoshi* *feerate* *startweight* *utxos* \[*reserve*\] \[*reservedok*\] \[*locktime*\]
DESCRIPTION
-----------
*utxopsbt* is a low-level RPC command which creates a PSBT using unreserved
inputs in the wallet, optionally reserving them as well.
It deliberately mirrors the parameters and output of
lightning-fundpsbt(7) except instead of an optional *minconf*
parameter to select unreserved outputs from the wallet, it takes a
compulsory list of outputs to use.
*utxos* must be an array of "txid:vout", each of which must be
reserved or available: the total amount must be sufficient to pay for
the resulting transaction plus *startweight* at the given *feerate*,
with at least *satoshi* left over (unless *satoshi* is **all**, which
is equivalent to setting it to zero).
Unless *reservedok* is set to true (default is false) it will also fail
if any of the *utxos* are already reserved.
*locktime* is an optional locktime: if not set, it is set to a recent
block height.
RETURN VALUE
------------
On success, returns the *psbt* containing the inputs, *feerate_per_kw*
showing the exact numeric feerate it used, *estimated_final_weight* for
the estimated weight of the transaction once fully signed, and
*excess_msat* containing the amount above *satoshi* which is
available. This could be zero, or dust. If *satoshi* was "all",
then *excess_msat* is the entire amount once fees are subtracted
for the weights of the inputs and *startweight*.
If *reserve* was true, then a *reservations* array is returned,
exactly like *reserveinputs*.
On error the returned object will contain `code` and `message` properties,
with `code` being one of the following:
- -32602: If the given parameters are wrong.
- -1: Catchall nonspecific error.
- 301: Insufficient UTXOs to meet *satoshi* value.
AUTHOR
------
Rusty Russell <<rusty@rustcorp.com.au>> is mainly responsible.
SEE ALSO
--------
lightning-fundpsbt(7).
RESOURCES
---------
Main web site: <https://github.com/ElementsProject/lightning>