core-lightning/doc/lightning-fetchinvoice.7.md
Rusty Russell eb6b8551d4 tools/fromschema.py: don't try to handle more complex cases.
We only handle top-level objects with an array of objects:
make sure it is one before we call the routines.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2023-01-30 15:15:41 -06:00

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lightning-fetchinvoice -- Command for fetch an invoice for an offer
===================================================================
SYNOPSIS
--------
**(WARNING: experimental-offers only)**
**fetchinvoice** *offer* [*amount\_msat*] [*quantity*] [*recurrence\_counter*] [*recurrence\_start*] [*recurrence\_label*] [*timeout*] [*payer\_note*]
DESCRIPTION
-----------
The **fetchinvoice** RPC command contacts the issuer of an *offer* to get
an actual invoice that can be paid. It highlights any changes between the
offer and the returned invoice.
If **fetchinvoice-noconnect** is not specified in the configuation, it
will connect to the destination in the (currently common!) case where it
cannot find a route which supports `option_onion_messages`.
The offer must not contain *send\_invoice*; see lightning-sendinvoice(7).
*amount\_msat* is required if the *offer* does not specify
an amount at all, otherwise it is not allowed.
*quantity* is is required if the *offer* specifies
*quantity\_min* or *quantity\_max*, otherwise it is not allowed.
*recurrence\_counter* is required if the *offer*
specifies *recurrence*, otherwise it is not allowed.
*recurrence\_counter* should first be set to 0, and incremented for
each successive invoice in a given series.
*recurrence\_start* is required if the *offer*
specifies *recurrence\_base* with *start\_any\_period* set, otherwise it
is not allowed. It indicates what period number to start at.
*recurrence\_label* is required if *recurrence\_counter* is set, and
otherwise is not allowed. It must be the same as prior fetchinvoice
calls for the same recurrence, as it is used to link them together.
*timeout* is an optional timeout; if we don't get a reply before this
we fail (default, 60 seconds).
*payer\_note* is an optional payer note to include in the fetched invoice.
RETURN VALUE
------------
[comment]: # (GENERATE-FROM-SCHEMA-START)
On success, an object is returned, containing:
- **invoice** (string): The BOLT12 invoice we fetched
- **changes** (object): Summary of changes from offer:
- **description\_appended** (string, optional): extra characters appended to the *description* field.
- **description** (string, optional): a completely replaced *description* field
- **vendor\_removed** (string, optional): The *vendor* from the offer, which is missing in the invoice
- **vendor** (string, optional): a completely replaced *vendor* field
- **amount\_msat** (msat, optional): the amount, if different from the offer amount multiplied by any *quantity* (or the offer had no amount, or was not in BTC).
- **next\_period** (object, optional): Only for recurring invoices if the next period is under the *recurrence\_limit*:
- **counter** (u64): the index of the next period to fetchinvoice
- **starttime** (u64): UNIX timestamp that the next period starts
- **endtime** (u64): UNIX timestamp that the next period ends
- **paywindow\_start** (u64): UNIX timestamp of the earliest time that the next invoice can be fetched
- **paywindow\_end** (u64): UNIX timestamp of the latest time that the next invoice can be fetched
[comment]: # (GENERATE-FROM-SCHEMA-END)
The following error codes may occur:
- -1: Catchall nonspecific error.
- 1002: Offer has expired.
- 1003: Cannot find a route to the node making the offer.
- 1004: The node making the offer returned an error message.
- 1005: We timed out trying to fetch an invoice.
AUTHOR
------
Rusty Russell <<rusty@rustcorp.com.au>> is mainly responsible.
SEE ALSO
--------
lightning-sendinvoice(7), lightning-pay(7).
RESOURCES
---------
Main web site: <https://github.com/ElementsProject/lightning>
[comment]: # ( SHA256STAMP:c14601b72fda248cbc8b86253bda6399a0886fc1fd0332d3acbc1d8800342126)