{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "title": "signParameters",
  "type": "object",
  "properties": {
    "txJSON": {
      "type": "string",
      "description": "Transaction represented as a JSON string in rippled format."
    },
    "secret": {
      "type": "string",
      "format": "secret",
      "description": "The secret of the account that is initiating the transaction. (This field cannot be used with keypair)."
    },
    "keypair": {
      "type": "object",
      "properties": {
        "privateKey": {
          "type": "privateKey",
          "description": "The uppercase hexadecimal representation of the secp256k1 or Ed25519 private key. Ed25519 keys are prefixed with 0xED. You can read about how keys are derived [here](https://xrpl.org/cryptographic-keys.html)."
        },
        "publicKey": {
          "type": "publicKey",
          "description": "The uppercase hexadecimal representation of the secp256k1 or Ed25519 public key. Ed25519 keys are prefixed with 0xED. You can read about how keys are derived [here](https://xrpl.org/cryptographic-keys.html)."
        }
      },
      "description": "The private and public key of the account that is initiating the transaction. (This field cannot be used with secret).",
      "required": ["privateKey", "publicKey"],
      "additionalProperties": false
    },
    "options": {
      "type": "object",
      "description": "Options that control the type of signature to create.",
      "properties": {
        "signAs": {
          "$ref": "address",
          "description": "The account that the signature should count for in multisigning."
        }
      },
      "additionalProperties": false
    }
  },
  "additionalProperties": false,
  "required": ["txJSON"],
  "oneOf": [
    {
      "required": ["secret"],
      "not": {"required": ["keypair"]}
    },
    {
      "required": ["keypair"],
      "not": {"required": ["secret"]}
    }
  ]
}