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doc: document output descriptors in hsmtool

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Touch a bit about it as a backup/recovery mechanism in the FAQ

Signed-off-by: Antoine Poinsot <darosior@protonmail.com>
This commit is contained in:
Antoine Poinsot
2020-11-02 00:14:20 +01:00
committed by neil saitug
parent fc964edc06
commit 6b347e1895
3 changed files with 22 additions and 2 deletions
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1
doc/FAQ.md
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@@ -108,7 +108,6 @@ C-lightning has an internal bitcoin wallet, which you can use to make "on-chain"
transactions, (see [withdraw](https://lightning.readthedocs.io/lightning-withdraw.7.html).
These on-chain funds are backed up via the HD wallet seed, stored in byte-form in `hsm_secret`.
and which you can backup thanks to a seed stored in the `hsm_secret`.
`lightningd` also stores information for funds locked in Lightning Network channels, which are stored
in a database. This database is required for on-going channel updates as well as channel closure.
There is no single-seed backup for funds locked in channels.

13
doc/lightning-hsmtool.8
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@@ -55,6 +55,17 @@ Specify \fIpassword\fR if the \fBhsm_secret\fR is encrypted\.
\fBgeneratehsm\fR \fIhsm_secret_path\fR
Generates a new hsm_secret using BIP39\.
\fBdumponchaindescriptors\fR \fIhsm_secret\fR [\fIpassword\fR] [\fInetwork\fR]
Dump output descriptors for our onchain wallet\.
The descriptors can be used by external services to be able to generate
addresses for our onchain wallet\. (for example on \fBbitcoind\fR using the
\fBimportmulti\fR or \fBimportdescriptors\fR RPC calls)
We need the path to the hsm_secret containing the wallet seed, and an optional
(skip using \fB""\fR) password if it was encrypted\.
To generate descriptors using testnet master keys, you may specify \fItestnet\fR as
the last parameter\. By default, mainnet-encoded keys are generated\.
.SH BUGS
You should report bugs on our github issues page, and maybe submit a fix
@@ -80,4 +91,4 @@ Note: the modules in the ccan/ directory have their own licenses, but
the rest of the code is covered by the BSD-style MIT license\.
Main web site: \fIhttps://github.com/ElementsProject/lightning\fR
\" SHA256STAMP:918981692d3840344e15c539b007b473d5ea0ad481145eccff092bf61ec6ddb0
\" SHA256STAMP:3d847c486363271e0635336caca4fd14f5007a3ff463c223fb5bdb52dbf7b98e

10
doc/lightning-hsmtool.8.md
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@@ -51,6 +51,16 @@ Specify *password* if the `hsm_secret` is encrypted.
**generatehsm** *hsm\_secret\_path*
Generates a new hsm_secret using BIP39.
**dumponchaindescriptors** *hsm_secret* \[*password*\] \[*network*\]
Dump output descriptors for our onchain wallet.
The descriptors can be used by external services to be able to generate
addresses for our onchain wallet. (for example on `bitcoind` using the
`importmulti` or `importdescriptors` RPC calls)
We need the path to the hsm_secret containing the wallet seed, and an optional
(skip using `""`) password if it was encrypted.
To generate descriptors using testnet master keys, you may specify *testnet* as
the last parameter. By default, mainnet-encoded keys are generated.
BUGS
----