lightning-checkmessage -- Command to check if a signature is from a node ===================================================================== SYNOPSIS -------- **checkmessage** *message* *zbase* [*pubkey*] DESCRIPTION ----------- The **checkmessage** RPC command is the counterpart to **signmessage**: given a node id (*pubkey*), signature (*zbase*) and a *message*, it verifies that the signature was generated by that node for that message (more technically: by someone who knows that node's secret). As a special case, if *pubkey* is not specified, we will try every known node key (as per *listnodes*), and verification succeeds if it matches for any one of them. Note: this is implemented far more efficiently than trying each one, so performance is not a concern. On failure, an error is returned and core lightning exit with the following error code: - -32602: Parameter missed or malformed; - 1301: *pubkey* not found in the graph. RETURN VALUE ------------ [comment]: # (GENERATE-FROM-SCHEMA-START) On success, an object is returned, containing: - **verified** (boolean): whether the signature was valid (always *true*) - **pubkey** (pubkey): the *pubkey* parameter, or the pubkey found by looking for known nodes [comment]: # (GENERATE-FROM-SCHEMA-END) AUTHOR ------ Rusty Russell <> is mainly responsible. SEE ALSO -------- lightning-signmessage(7) RESOURCES --------- Main web site: [comment]: # ( SHA256STAMP:2e39c4cb816b9585d5e8262a09b873a9eaa0f04ac8f1281bfb36e08f71e5c923)