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Validation errors occur after the request has successfully made it into the internal transaction handlers, but further value validation, or business rules, have determined one or more errors.
Response Structure: Validation Error
{
  "data": { "nameOfMutation": null },
  "errors": [
    {
      "message": "<text description of the error>",
      "path": ["<name of mutation or query>"],
      "extensions": {
        "code": "<a specific error code for the error>",
        "advice": "<advice for resolving the error>",
        "valueInError": "<the value provided that is in error>"
      }
    }
  ]
}
Response: Capture - Payment Is Already Captured
{
  "data": null,
  "errors": [
    {
      "message": "Payment is already fully captured",
      "path": ["captureAuthorization"],
      "extensions": {
        "code": "PAYMENT_IS_ALREADY_CAPTURED",
        "advice": "Review error details and fix internal system",
        "valueInError": "<guid>"
      }
    }
  ]
}
Response: Capture - Capture Amount Exceeds Authorized Amount
{
  "data": null,
  "errors": [
    {
      "message": "Cannot capture more than what was authorized",
      "path": ["captureAuthorization"],
      "extensions": {
        "code": "CAPTURE_AMOUNT_EXCEEDS_AUTHORIZED_AMOUNT",
        "advice": "Review error details and fix internal system",
        "valueInError": "<decimal>"
      }
    }
  ]
}
Response: Refund - Payment Not Settled
{
  "data": null,
  "errors": [
    {
      "message": "Cannot refund a payment that hasn't been settled",
      "path": ["refundWithReference"],
      "extensions": {
        "code": "PAYMENT_NOT_SETTLED",
        "advice": "Review error details and fix internal system",
        "valueInError": "<guid>"
      }
    }
  ]
}
Response: Refund - Original Transaction Was Declined
{
  "data": null,
  "errors": [
    {
      "message": "Transaction to be refunded must have been approved",
      "path": ["refundWithReference"],
      "extensions": {
        "code": "ORIGINAL_TRANSACTION_WAS_DECLINED",
        "advice": "Review error details and fix internal system",
        "valueInError": "<guid>"
      }
    }
  ]
}
Response: Refund - Amount Exceeds Outstanding Balance
{
  "data": null,
  "errors": [
    {
      "message": "Refund amount exceeds outstanding balance",
      "path": ["refundWithReference"],
      "extensions": {
        "code": "REFUND_AMOUNT_EXCEEDS_OUTSTANDING_BALANCE",
        "advice": "Review error details and fix internal system",
        "valueInError": "<decimal>"
      }
    }
  ]
}
Response: Refund - Amount Must Be Greater Than Zero
{
  "data": null,
  "errors": [
    {
      "message": "Refund amount must be greater than zero",
      "path": ["refundWithReference"],
      "extensions": {
        "code": "REFUND_AMOUNT_MUST_BE_GREATER_THAN_ZERO",
        "advice": "Review error details and fix internal system",
        "valueInError": "<decimal>"
      }
    }
  ]
}
Response: Refund - Merchant ID Doesn't Match Prior Authorization
{
  "data": null,
  "errors": [
    {
      "message": "Merchant ID does not match that of previous transaction",
      "path": ["refundWithReference"],
      "extensions": {
        "code": "MERCHANT_ID_DOESNT_MATCH_PRIOR_AUTH",
        "advice": "Review error details and fix internal system",
        "valueInError": "<guid>"
      }
    }
  ]
}
Response: Refund - Invalid Transaction Type For Refund
{
  "data": null,
  "errors": [
    {
      "message": "Payment must be captured to be refunded",
      "path": ["refundWithReference"],
      "extensions": {
        "code": "PAYMENT_MUST_BE_SETTLED",
        "advice": "Review error details and fix internal system",
        "valueInError": "<guid>"
      }
    }
  ]
}
Response: Reversal - Original Transaction Was Declined
{
  "data": null,
  "errors": [
    {
      "message": "Transaction to be reversed must have been approved",
      "path": ["reverseTransaction"],
      "extensions": {
        "code": "ORIGINAL_TRANSACTION_WAS_DECLINED",
        "advice": "Review error details and fix internal system",
        "valueInError": "<guid>"
      }
    }
  ]
}
Response: Reversal - Invalid Transaction Type For Reversal
{
  "data": null,
  "errors": [
    {
      "message": "<text description of the error>",
      "path": ["reverseTransaction"],
      "extensions": {
        "code": "INVALID_TRANSACTION_TYPE_FOR_REVERSAL",
        "advice": "Review error details and fix internal system",
        "valueInError": "<guid>"
      }
    }
  ]
}
Response: Reversal - Reversal Amount Exceeds Authorized Amount
{
  "data": null,
  "errors": [
    {
      "message": "Reversal amount too high",
      "path": ["reverseTransaction"],
      "extensions": {
        "code": "REVERSAL_AMOUNT_GREATER_THAN_ORIGINAL_AUTHORIZATION_AMOUNT",
        "advice": "Review error details and fix internal system",
        "valueInError": "<decimal>"
      }
    }
  ]
}
Response: Reversal - Payment Already Settled
{
  "data": null,
  "errors": [
    {
      "message": "Cant reverse a transaction that has already been cleared",
      "path": ["reverseTransaction"],
      "extensions": {
        "code": "PAYMENT_ALREADY_SETTLED",
        "advice": "Review error details and fix internal system",
        "valueInError": "<guid>"
      }
    }
  ]
}
Response: Reversal - Merchant ID Doesn't Match Prior Authorization
{
  "data": null,
  "errors": [
    {
      "message": "Merchant ID does not match that of previous transaction",
      "path": ["reverseTransaction"],
      "extensions": {
        "code": "PRIOR_AUTH_MID_MUST_MATCH_REQUEST_MID",
        "advice": "Review error details and fix internal system",
        "valueInError": "<guid>"
      }
    }
  ]
}
Response: Reversal - Amounts Don't Equal Requested Amount
{
  "data": null,
  "errors": [
    {
      "message": "Sum of amount details does not match TransactionAmount",
      "path": ["reverseTransaction"],
      "extensions": {
        "code": "AMOUNTS_DO_NOT_ADD_UP_TO_TOTAL_REQUESTED_AMOUNT",
        "advice": "Review error details and fix internal system",
        "valueInError": "<decimal>"
      }
    }
  ]
}