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.TH "LIGHTNING-HSMTOOL" "8" "" "" "lightning-hsmtool"
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.SH NAME
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lightning-hsmtool - Tool for working with software HSM secrets of lightningd
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.SH SYNOPSIS
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.nf
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.RS
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lightning-hsmtool method [ARGUMENTS]...
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.RE
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.fi
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.SH DESCRIPTION
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\fBlightning-hsmtool\fR performs various operations on the \fBhsm_secret\fR
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file used by the software HSM component of \fBlightningd\fR\.
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This can be used to encrypt and decrypt the \fBhsm_secret\fR file,
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as well as derive secrets used in channel commitments\.
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.SH METHODS
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\fBencrypt\fR \fIhsm_secret\fR \fIpassword\fR
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Encrypt the \fBhsm_secret\fR file so that it can only be decrypted at
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\fBlightningd\fR startup\.
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You must give the option \fB--encrypted-hsm\fR to \fBlightningd\fR\.
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The password of the \fBhsm_secret\fR file will be asked whenever you
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start \fBlightningd\fR\.
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\fBdecrypt\fR \fIhsm_secret\fR \fIpassword\fR
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Decrypt the \fBhsm_secret\fR file that was encrypted with the \fBencrypt\fR
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method\.
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\fBdumpcommitments\fR \fInode_id\fR \fIchannel_dbid\fR \fIdepth\fR \fIhsm_secret\fR [\fIpassword\fR]
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Show the per-commitment secret and point of up to \fIdepth\fR commitments,
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of the specified channel with the specified peer,
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identified by the channel database index\.
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Specify \fIpassword\fR if the \fBhsm_secret\fR is encrypted\.
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\fBguesstoremote\fR \fIp2wpkh\fR \fInode_id\fR \fImax_channel_dbid\fR \fIhsm_secret\fR [\fIpassword\fR]
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Brute-force the private key to our funds from a remote unilateral close
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of a channel, in a case where we have lost all database data except for
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our \fBhsm_secret\fR\.
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The peer must be the one to close the channel (and the funds will remain
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unrecoverable until the channel is closed)\.
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\fImax_channel_dbid\fR is your own guess on what the \fIchannel_dbid\fR was,
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or at least the maximum possible value,
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and is usually no greater than the number of channels that the node has
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ever had\.
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Specify \fIpassword\fR if the \fBhsm_secret\fR is encrypted\.
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.SH BUGS
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You should report bugs on our github issues page, and maybe submit a fix
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to gain our eternal gratitude!
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.SH AUTHOR
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ZmnSCPxj < \fIZmnSCPxj@protonmail.com\fR > wrote the initial version of
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this man page, but many others did the hard work of actually implementing
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\fBlightning-hsmtool\fR\.
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.SH SEE ALSO
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\fBlightningd\fR(8), \fBlightningd-config\fR(5)
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.SH RESOURCES
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Main web site: \fIhttps://github.com/ElementsProject/lightning\fR
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.SH COPYING
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Note: the modules in the ccan/ directory have their own licenses, but
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the rest of the code is covered by the BSD-style MIT license\.
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Main web site: \fIhttps://github.com/ElementsProject/lightning\fR
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\" SHA256STAMP:11b3e6c050eb31e7faac10e8b75c3f7b7d57269f7f8c47c67f6d115b7a479c09
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