core-lightning/doc/lightning-datastore.7.md
niftynei ba7d4a8f6b make-schema: don't include tools/fromschema.py in SHASUMS
We were including the entire list of prerequisites when generating a
shastamp, which for schemas includes the `tools/fromschema.py` doc.

This meant all of our shasums were updating anytime this tool file
changed.

Instead, we just include the first prerequisite.

See: https://www.gnu.org/software/make/manual/html_node/Automatic-Variables.html#Automatic-Variables
2022-07-14 12:24:48 -05:00

69 lines
2.2 KiB
Markdown

lightning-datastore -- Command for storing (plugin) data
========================================================
SYNOPSIS
--------
**datastore** *key* [*string*] [*hex*] [*mode*] [*generation*]
DESCRIPTION
-----------
The **datastore** RPC command allows plugins to store data in the
Core Lightning database, for later retrieval.
*key* is an array of values (though a single value is treated as a
one-element array), to form a hierarchy. Using the first element of
the key as the plugin name (e.g. `[ "summary" ]`) is recommended.
A key can either have children or a value, never both: parents are
created and removed automatically.
*mode* is one of "must-create" (default, fails if it already exists),
"must-replace" (fails if it doesn't already exist),
"create-or-replace" (never fails), "must-append" (must already exist,
append this to what's already there) or "create-or-append" (append if
anything is there, otherwise create).
*generation*, if specified, means that the update will fail if the
previously-existing data is not exactly that generation. This allows
for simple atomicity. This is only legal with *mode* "must-replace"
or "must-append".
RETURN VALUE
------------
[comment]: # (GENERATE-FROM-SCHEMA-START)
On success, an object is returned, containing:
- **key** (array of strings):
- Part of the key added to the datastore
- **generation** (u64, optional): The number of times this has been updated
- **hex** (hex, optional): The hex data which has been added to the datastore
- **string** (string, optional): The data as a string, if it's valid utf-8
[comment]: # (GENERATE-FROM-SCHEMA-END)
The following error codes may occur:
- 1202: The key already exists (and mode said it must not)
- 1203: The key does not exist (and mode said it must)
- 1204: The generation was wrong (and generation was specified)
- 1205: The key has children already.
- 1206: One of the parents already exists with a value.
- -32602: invalid parameters
AUTHOR
------
Rusty Russell <<rusty@rustcorp.com.au>> is mainly responsible.
SEE ALSO
--------
lightning-listdatastore(7), lightning-deldatastore(7)
RESOURCES
---------
Main web site: <https://github.com/ElementsProject/lightning>
[comment]: # ( SHA256STAMP:ce6a72f08dd7f6026eab58bb6ea732aead4512e714fab4f9a1cf54cdb1374f59)