lightning-utxopsbt -- Command to populate PSBT inputs from given UTXOs ================================================================ SYNOPSIS -------- **utxopsbt** *satoshi* *feerate* *startweight* *utxos* \[*reserve*\] \[*reservedok*\] \[*locktime*\] \[*min_witness_weight*\] \[*excess_as_change*\] 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. *min_witness_weight* is an optional minimum weight to use for a UTXO's witness. If the actual witness weight is greater than the provided minimum, the actual witness weight will be used. *excess_as_change* is an optional boolean to flag to add a change output for the excess sats. 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*. If *excess_as_change* is true and the excess is enough to cover an additional output above the `dust_limit`, then an output is added to the PSBT for the excess amount. The *excess_msat* will be zero. A *change_outnum* will be returned with the index of the change output. 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 <> is mainly responsible. SEE ALSO -------- lightning-fundpsbt(7). RESOURCES --------- Main web site: