doTransaction - Nayax Developer Portal

The doTransaction method initiates and processes payment transactions within the TweezerComm protocol. It enables client applications, such as point-of-sale (POS) systems or electronic cash registers (ECRs), to interact with the Agamento payment terminal for secure transaction execution. This method supports multiple transaction types, including:

Regular Transactions (PreSelection): Standard payments using credit cards or closed-loop payment methods.
Pre-Authorization (initiation): Reserve a specified amount on a customer’s card for later confirmation.
Pre-Authorization Completion and Cancellation: Completing or voiding previously authorized transactions.
MOTO (Mail Order/Telephone Order) Transactions: Processing card-not-present transactions securely.
Refunds: Partial or full refunds of previous transactions.
Deferred Payments: Approving transactions even in cases where there is no immediate network connectivity.

The sections below will describe the request parameters in more detail:

Requests

JSON-RPC 2.0All methods in TweezerComm follow a JSON-RPC 2.0 structure. See Get Started for more details on how the requests are structured and sent.

In the request, the method field needs to be set to doTransaction, the transaction is defined by the tranCode parameter. Check the example request for each transaction type on the tabs below:

Mandatory Fieldsvuid, amount and tranType are mandatory for all requests. All others depend on the type of transaction made.

Regular Transaction
Pre-Authorization
Complete Pre-Authorization
Cancel Pre-Authorization
MOTO

For a regular transaction, set the tranType parameter to 1. The code block shows a request example for a regular transaction:

{
    "jsonrpc": "2.0",
    "method": "doTransaction",
    "id": "123454352",
    "params": [
        "engine",
        {
            "vuid": "44d96006",
            "amount": 100,
            "tranType": 1
        }
    ]
}

Parameter Definitions

The table below describes all parameters available in this request:

Name	Type	Description
`vuid`	string	Vendor (client) unique transaction identifier.
`amount`	integer	Amount in cents.
`tranType`	integer	The transaction type code. 1: Single Step Transaction.

For initiating a Pre-Authorization transaction, set the tranType parameter to 3. The code block shows a request example for initiating a Pre-Authorization transaction:

{
"jsonrpc": "2.0",
"method": "doTransaction",
"id": "1696161997899",
"params": [
"engine",
{
    "vuid": "80b458684",
    "tranType": 3,
    "amount": 100,
    }
]
}

Parameter Definitions

The table below describes all parameters available in this request:

Name	Type	Description
`vuid`	string	Vendor (client) unique transaction identifier.
`tranType`	integer	Transaction type. 3: Pre-Authorization.
`amount`	integer	Amount in cents.

For completing a Pre-Authorization transaction, set the tranType parameter to 6. The code block shows a request example for completing a Pre-Authorization transaction:

{
"jsonrpc": "2.0",
"method": "doTransaction",
"id": "1696161997899",
"params": [
"engine",
{
    "vuid": "80b458654",
    "tranType": 6,
    "amount": 100,
    "originalTransactionId":"2022052432"
    }
]
}

Parameter Definitions

The table below describes all parameters available in this request:

Name	Type	Description
`vuid`	string	Vendor (client) unique transaction identifier.
`tranType`	integer	Transaction type. 6: Complete Pre-Authorization.
`amount`	integer	Amount in cents.
`originalTransactionId`	string	The ID of the original pre-authorization transaction.

For canceling a Pre-Authorization transaction which has been initiated, set the tranType parameter to 7. The code block shows a request example for such cancellation:

{
"jsonrpc": "2.0",
"method": "doTransaction",
"id": "1696161997899",
"params": [
"engine",
{
    "vuid": "80b458654",
    "tranType": 7,
    "amount": 100,
    "originalTransactionId":"2022052432"
    }
]
}

Parameter Definitions

The table below describes all parameters available in this request:

Name	Type	Description
`vuid`	string	Vendor (client) unique transaction identifier.
`tranType`	integer	Transaction type. 7: Cancel Pre-Authorization.
`amount`	integer	Amount in cents.
`originalTransactionId`	string	The ID of the original pre-authorization transaction.

For a MOTO transaction, set the tranCode parameter to 5. The code block shows a request example for a MOTO transaction:

{
"jsonrpc": "2.0",
"method": "doTransaction",
"id": "1696161997899",
"params": [
"engine",
{
    "vuid": "80b458654",
    "tranType": 5,
    "amount": 100,
    "pan": "1234567812345678",
    "exp": "0927",
    "cvv": "987"
    }
]
}

Parameter Definitions

The table below describes all parameters available in this request:

Name	Type	Description
`vuid`	string	Vendor (client) unique transaction identifier.
`tranType`	integer	Transaction type. 5: MOTO.
`amount`	integer	Amount in cents.
`pan`	string	Required: The 16-digit card number.
`exp`	string	Required: Card expiration date (MMYY).
`cvv`	string	Required: 3-digit security code.

Responses

The service will return a response structured similarly to the examples provided in the code blocks below:

Regular Transaction
Pre-Authorization
Complete Pre-Authorization
Cancel Pre-Authorization
MOTO

{
  "jsonrpc": "2.0",
  "id": "123454352",
  "result": {
      "statusCode": 0,
      "statusMessage": "TRANSACTION APPROVED",
      "appVersion": "01.06.62",
      "vuid": "12354",
      "amount": 100,
      "transactionId": "2038584332",
      "entryMode": 4,
      "transactionOriginalRequestId": "6439809e-619f-414b-8c3e-f1a9f3c3bc49",
      "transactionOriginalTime": "2025-03-05 23:08:06.597",
      "transactionOriginalAmount": 100,
      "serverResultMessage": "Sale is Approved",
      "tranType": 1,
      "dtId": "1741244869236399011",
      "rrn": "250306070806",
      "maskedPan": "541333******4111",
      "currencyCode": "USD",
      "currencyISOCode": "840",
      "originalSiteId": 1,
      "mainBoardSerial": "000177234933444",
      "hwSerial": "0900044624102737"
  }
}

Response Parameters

Below is a table with all the possible response parameters and their description:

Name	Type	Description
`statusCode`	integer	Result of the request (0 for success).
`statusMessage`	string	Text description of the status.
`appVersion`	string	Version of the payment application.
`vuid`	string	Vendor unique transaction identifier.
`amount`	integer	Final transaction amount in cents.
`transactionId`	string	Unique gateway transaction ID.
`entryMode`	integer	Method used to read the card (e.g., Chip, Contactless).
`transactionOriginalRequestId`	string	ID of the original request.
`transactionOriginalTime`	string	Timestamp of the original transaction.
`transactionOriginalAmount`	integer	Original amount requested.
`serverResultMessage`	string	Detailed message from the processing server.
`tranType`	integer	Transaction type code (1 for Regular).
`dtId`	string	Device Transaction Identifier.
`rrn`	string	Retrieval Reference Number.
`maskedPan`	string	The masked card number used for the transaction.
`currencyCode`	string	Alphanumeric currency code (e.g., USD).
`currencyISOCode`	string	Numeric ISO currency code (e.g., 840).
`originalSiteId`	integer	Identifier of the originating site.
`mainBoardSerial`	string	Serial number of the device main board.
`hwSerial`	string	Hardware serial number.

{
"jsonrpc": "2.0",
"id": "123454352",
"result": {
    "statusCode": 0,
    "statusMessage": "TRANSACTION APPROVED",
    "appVersion": "01.06.38",
    "vuid": "80b45894",
    "tranType": 3,
    "amount": 100,
    "currencyCode": "GBP",
    "currencyISOCode": "826",
    "transactionId": "2022052432",
    "dtId": "1721134022667243531",
    "rrn": "240716123742",
    "maskedPan": "374245*****1007"
}
}

Response Parameters

Below is a table with all the possible response parameters and their description:

Name	Type	Description
`statusCode`	integer	Result of the request (0 for success).
`statusMessage`	string	Text description of the status.
`appVersion`	string	Version of the payment application.
`vuid`	string	Vendor unique transaction identifier.
`tranType`	integer	Transaction type code (3 for Pre-Auth).
`amount`	integer	Reserved amount in cents.
`currencyCode`	string	Alphanumeric currency code.
`currencyISOCode`	string	Numeric ISO currency code.
`transactionId`	string	Unique gateway transaction ID.
`dtId`	string	Device Transaction Identifier.
`rrn`	string	Retrieval Reference Number.
`maskedPan`	string	Masked card number used for reservation.

{
"jsonrpc": "2.0",
"id": "1696161997899",
"result": {
     "statusCode": 0,
     "statusMessage": "TRANSACTION APPROVED",
     "appVersion": "01.06.64",
      "vuid": "80b458654",
      "amount": 100,
     "transactionId": "2022052432",
     "entryMode": 4096,
      "transactionOriginalAmount": 128,
      "tranType": 6,
      "dtId": "1743763936600399011",
     "currencyCode": "USD",
      "currencyISOCode": "840"
}
}

Response Parameters

Below is a table with all the possible response parameters and their description:

Name	Type	Description
`statusCode`	integer	Result of the request.
`statusMessage`	string	Text description of the status.
`appVersion`	string	Version of the payment application.
`vuid`	string	Vendor unique transaction identifier.
`amount`	integer	Final captured amount in cents.
`transactionId`	string	Unique gateway transaction ID.
`entryMode`	integer	Method used for the capture.
`transactionOriginalAmount`	integer	Amount reserved in the initial pre-auth.
`tranType`	integer	Transaction type code (6 for Completion).
`dtId`	string	Device Transaction Identifier.
`currencyCode`	string	Alphanumeric currency code.
`currencyISOCode`	string	Numeric ISO currency code.

{
"jsonrpc": "2.0",
"id": "123454352",
"result": {
    "statusCode": 0,
    "statusMessage": "TRANSACTION APPROVED",
    "appVersion": "01.06.38",
    "vuid": "80b45894",
    "tranType": 7,
    "amount": 100,
    "currencyCode": "GBP",
    "currencyISOCode": "826",
    "transactionId": "2022052432",
    "dtId": "1721134022667243531",
    "rrn": "240716123742",
    "maskedPan": "374245*****1007"
}
}

Response Parameters

Below is a table with all the possible response parameters and their description:

Name	Type	Description
`statusCode`	integer	Result of the request.
`statusMessage`	string	Text description of the status.
`appVersion`	string	Version of the payment application.
`vuid`	string	Vendor unique transaction identifier.
`tranType`	integer	Transaction type code (7 for Cancellation).
`amount`	integer	Amount released in cents.
`currencyCode`	string	Alphanumeric currency code.
`currencyISOCode`	string	Numeric ISO currency code.
`transactionId`	string	Unique gateway transaction ID.
`dtId`	string	Device Transaction Identifier.
`rrn`	string	Retrieval Reference Number.
`maskedPan`	string	Masked card number associated with the void.

{
"jsonrpc": "2.0",
"id": "123454352",
"result": {
    "statusCode": 0,
    "statusMessage": "TRANSACTION APPROVED",
    "appVersion": "01.06.38",
    "vuid": "80b45894",
    "tranType": 5,
    "amount": 100,
    "currencyCode": "GBP",
    "currencyISOCode": "826",
    "transactionId": "2022052432",
    "dtId": "1721134022667243531",
    "rrn": "240716123742",
    "maskedPan": "374245*****1007"
}
}

Response Parameters

Below is a table with all the possible response parameters and their description:

Name	Type	Description
`statusCode`	integer	Result of the request (0 for success).
`statusMessage`	string	Text description of the status.
`appVersion`	string	Version of the payment application.
`vuid`	string	Vendor unique transaction identifier.
`tranType`	integer	Transaction type code (5 for MOTO).
`amount`	integer	Transaction amount in cents.
`currencyCode`	string	Alphanumeric currency code (e.g., GBP).
`currencyISOCode`	string	Numeric ISO currency code (e.g., 826).
`transactionId`	string	Unique gateway transaction ID.
`dtId`	string	Device Transaction Identifier.
`rrn`	string	Retrieval Reference Number.
`maskedPan`	string	The masked card number entered manually.

TweezerComm Guides

​Requests

​Parameter Definitions

​Parameter Definitions

​Parameter Definitions

​Parameter Definitions

​Parameter Definitions

​Responses

​Response Parameters

​Response Parameters

​Response Parameters

​Response Parameters

​Response Parameters

Requests

Parameter Definitions

Parameter Definitions

Parameter Definitions

Parameter Definitions

Parameter Definitions

Responses

Response Parameters

Response Parameters

Response Parameters

Response Parameters

Response Parameters