Consideration

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://opensea.io/schemas/Consideration",
  "title": "Consideration",
  "type": "object",
  "properties": {
    "itemType": {
      "type": "integer",
      "format": "int32"
    },
    "token": {
      "type": "string"
    },
    "identifierOrCriteria": {
      "type": "string",
      "description": "For criteria-based offers, this is the merkle root of eligible token IDs. For trait offers on supported collections, this will be '0' \u2014 trait matching is validated server-side at fulfillment time instead of via onchain merkle proof."
    },
    "startAmount": {
      "type": "string"
    },
    "endAmount": {
      "type": "string"
    },
    "recipient": {
      "type": "string"
    }
  },
  "required": [
    "endAmount",
    "identifierOrCriteria",
    "itemType",
    "recipient",
    "startAmount",
    "token"
  ]
}