ibc.prove

{
  "name": "lastproof",
  "base": "",
  "fields": [
    {
      "name": "id",
      "type": "uint64"
    },
    {
      "name": "block_height",
      "type": "uint32"
    },
    {
      "name": "block_merkle_root",
      "type": "checksum256"
    },
    {
      "name": "expiry",
      "type": "time_point"
    }
  ]
}