contract2.gm

{
  "name": "commit",
  "base": "",
  "fields": [
    {
      "name": "oracle_id",
      "type": "name"
    },
    {
      "name": "epoch",
      "type": "uint64"
    },
    {
      "name": "commit",
      "type": "checksum256"
    }
  ]
}