{
  "$schema": "../rpc-schema-draft.json",
  "type": "object",
  "additionalProperties": false,
  "rpc": "signmessage",
  "title": "Command to create a signature from this node",
  "description": [
    "The **signmessage** RPC command creates a digital signature of *message* using this node's secret key. A receiver who knows your node's *id* and the *message* can be sure that the resulting signature could only be created by something with access to this node's secret key."
  ],
  "request": {
    "required": [
      "message"
    ],
    "properties": {
      "message": {
        "type": "string",
        "description": [
          "Less than 65536 characters long message to be signed by the node."
        ]
      }
    }
  },
  "response": {
    "required": [
      "signature",
      "recid",
      "zbase"
    ],
    "properties": {
      "signature": {
        "type": "hex",
        "description": [
          "The signature."
        ],
        "minLength": 128,
        "maxLength": 128
      },
      "recid": {
        "type": "hex",
        "description": [
          "The recovery id (0, 1, 2 or 3)."
        ],
        "minLength": 2,
        "maxLength": 2
      },
      "zbase": {
        "type": "string",
        "description": [
          "*signature* and *recid* encoded in a style compatible with **lnd**'s [SignMessageRequest](https://api.lightning.community/#grpc-request- signmessagerequest)."
        ]
      }
    }
  },
  "example_json_request": [
    {
      "id": "example:signmessage#1",
      "method": "signmessage",
      "params": {
        "message": "this is a test!"
      }
    },
    {
      "id": "example:signmessage#2",
      "method": "signmessage",
      "params": {
        "message": "message for you"
      }
    }
  ],
  "example_json_response": [
    {
      "signature": "a2ec227012795f9d6b80a3f5ea98374c6d2886917517c05336799923fcf37caf08344c0431275e1a8189da01b444ae978007fe70f0cc9009f38cabe074ade87d",
      "recid": "00",
      "zbase": "d6tqaeuonjhi98mmont9m4wag7gg4krg1f4txonug3h31e9h6p6k6nbwjondnj46dkyausobstnk7fhyy998bhgc1yr98dfmhb4k54d7"
    },
    {
      "signature": "85843b010bc517b32eaafe70232e2c44bb5a354c74d2202390af1b272e4c6ac23ac3f97ea663d8b49116ad6c2d080515b43bcdf1ea4f38cdb18af0edf8209cd8",
      "recid": "00",
      "zbase": "d6naeqabbxntxc3qim98ye3qftnmsstijt4prebd1nztsj3qjticrqsd9f9kca6as1etpmmcfwrykfpw8xg9d41x8dg5dnzo7zhnb8ga"
    }
  ],
  "author": [
    "Rusty Russell <<rusty@rustcorp.com.au>> is mainly responsible."
  ],
  "see_also": [
    "lightning-checkmessage(7)"
  ],
  "resources": [
    "Main web site: <https://github.com/ElementsProject/lightning>",
    "",
    "[SignMessageRequest](https://api.lightning.community/#grpc-request-signmessagerequest)"
  ]
}