minecraft-bedrock-json-schemas/source/behavior/entities/format/behaviors/barter.json

{
  "$id": "blockception.minecraft.behavior.entities.minecraft.behavior.barter",
  "type": "object",
  "title": "Barter",
  "description": "Enables the mob to barter for items that have been configured as barter currency. Must be used in combination with the barter component",
  "additionalProperties": false,
  "properties": { "priority": { "$ref": "types/priority.json" } }
}