{
  "$schema": "http://json-schema.org/draft-04/schema",
  "title": "Sha256SignedMessage",
  "description": "Signed sha256 message",
  "type": "object",
  "properties": {
    "type": {
      "description": "Cryptographic signature algorithm",
      "type": "string",
      "enum": ["sha256"]
    },
    "digest": {
      "description": "Base64-encoded hash of the transfer id, state, and ledger signature",
      "$ref": "Base64.json"
    },
    "signer": {
      "description": "(Optional) IRI of signer",
      "$ref": "Iri.json"
    },
    "condition_state": {
      "description": "Requested state of transfer; used to compute condition_digest",
      "oneOf": [{
        "$ref": "TransferState.json"
      }, {
        "enum": ["nonexistent"]
      }]
    },
    "condition_digest": {
      "description": "Base64-encoded hash of the transfer id, condition_state, and ledger signature",
      "$ref": "Base64.json"
    },
    "message": {
      "type": "object"
    }
  },
  "required": ["type", "digest"],
  "additionalProperties": false
}