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lightning-checkmessage -- Command to check a signature is from a node
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=====================================================================
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SYNOPSIS
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--------
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**checkmessage** *message* *zbase* \[*pubkey*\]
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DESCRIPTION
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-----------
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The **checkmessage** RPC command is the counterpart to
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**signmessage**: given a node id (*pubkey*), signature (*zbase*) and a
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*message*, it verifies that the signature was generated by that node
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for that message (more technically: by someone who knows that node's
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secret).
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As a special case, if *pubkey* is not specified, we will try every
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known node key (as per *listnodes*), and verification succeeds if it
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matches for any one of them. Note: this is implemented far more
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efficiently than trying each one, so performance is not a concern.
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RETURN VALUE
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------------
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On correct usage, an object with attribute *verified* will be
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returned.
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If *verified* is true, the signature was generated by the returned
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*pubkey* for that given message. *pubkey* is the one specified as
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input, or if none was specified, the known node which must have
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produced this signature.
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If *verified* is false, the signature is meaningless. *pubkey* may
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also be returned, which is they *pubkey* (if any) for which this
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signature would be valid. This is usually not useful.
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AUTHOR
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------
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Rusty Russell <<rusty@rustcorp.com.au>> is mainly responsible.
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SEE ALSO
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--------
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lightning-signmessage(7)
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RESOURCES
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---------
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Main web site: <https://github.com/ElementsProject/lightning>
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