{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://coldai.org/siontology/docs/agent/commerce/instrument.schema.json",
  "title": "org.siontology.ledger instrument",
  "description": "An ACP payment instrument for the handler org.siontology.ledger: a Siontology transaction signed against the handler's requirements and not submitted.",
  "type": "object",
  "required": ["handler_id", "type", "credential"],
  "properties": {
    "id": {"type": "string"},
    "handler_id": {"type": "string"},
    "type": {"const": "sion_transaction"},
    "credential": {
      "type": "object",
      "required": ["type", "token"],
      "properties": {
        "type": {"const": "signed_transaction"},
        "token": {"type": "string", "pattern": "^[0-9a-f]+$", "description": "The signed transaction's Borsh encoding, in hex: a USD transfer to pay_to of the amount, or an AgentPay under the payer's Agent Charter whose purpose is the requirements' purpose. ACP's instrument requires its credential's token."},
        "transaction": {"type": "string", "pattern": "^[0-9a-f]+$", "description": "The same, as the handler's first version named it; still taken when token is absent."}
      }
    }
  }
}