Method signMessage

Parameters: {
  message: string, // message to sign
  address?: string, // bitcoin address
}

Returns: {
  signature: string, // hex encoded bytes of the signature
  messageHash?: string, // hex encoded bytes of the message hash
  address: string, // bitcoin address used to sign
}

window.btc.request("signMessage", {
  message: "Hello, world!",
  address: "1KXrWXciRDZUpQwQmuM1DbwsKDLYAYsVLR",
});