Transaction Data¶

Transaction data allows you to include additional context in the OID4VP authorization request. This is useful for scenarios where the verifier needs to convey transaction-specific information that the wallet can display to the user for informed consent.

Overview¶

When requesting credentials from a user's wallet, you may need to provide context about why the credentials are being requested. Transaction data enables this by:

Providing transaction context to the wallet and user
Enabling informed consent by showing what the credentials will be used for
Supporting various use cases like payments, contract signing, or access control

Configuration¶

Transaction data is defined as an array of objects. It can be configured at two levels:

Presentation Configuration - Default transaction data for all requests using this configuration
Request Time - Override or provide transaction data when creating a specific presentation request

In Presentation Configuration¶

Add transaction data to your presentation configuration:

{
    "id": "payment-verification",
    "description": "Payment verification with transaction details",
    "dcql_query": {
        "credentials": [
            {
                "id": "pid",
                "format": "dc+sd-jwt",
                "meta": {
                    "vct_values": ["urn:eudi:pid:1"]
                }
            }
        ]
    },
    "transaction_data": [
        {
            "type": "payment",
            "credential_ids": ["pid"],
            "amount": 100,
            "currency": "EUR",
            "merchant": "Example Store"
        }
    ]
}

At Request Time¶

When creating a presentation request via the /verifier/offer endpoint, you can provide or override transaction data:

{
    "requestId": "payment-verification",
    "response_type": "uri",
    "transaction_data": [
        {
            "type": "payment",
            "credential_ids": ["pid"],
            "amount": 250,
            "currency": "EUR",
            "merchant": "Different Store"
        }
    ]
}

Override Behavior

When transaction_data is provided in the request, it completely replaces any transaction data defined in the presentation configuration. The two are not merged.

Fields¶

Each transaction data object must include the following required fields:

Field	Type	Required	Description
`type`	string	Yes	Identifies the type of transaction (e.g., `"payment"`, `"age_verification"`, `"contract_signing"`)
`credential_ids`	string[]	Yes	Array of credential IDs from the DCQL query that this transaction data relates to

Additional properties can be added based on the transaction type to provide context-specific information.

Use Cases¶

Payment Authorization¶

Include payment details so users can verify the transaction before sharing credentials:

{
    "type": "payment",
    "credential_ids": ["pid"],
    "amount": 49.99,
    "currency": "EUR",
    "merchant": "Online Shop GmbH",
    "reference": "ORDER-12345"
}

Age Verification¶

Specify the minimum age requirement for age-restricted services:

{
    "type": "age_verification",
    "credential_ids": ["pid"],
    "minimum_age": 18,
    "service": "Alcohol Purchase"
}

Contract Signing¶

Reference document details for contract or agreement signing:

{
    "type": "contract_signing",
    "credential_ids": ["pid"],
    "document_hash": "sha256:abc123...",
    "document_title": "Service Agreement",
    "signing_date": "2026-01-25"
}

Access Control¶

Include resource or permission information for access control scenarios:

{
    "type": "access_control",
    "credential_ids": ["employee_badge"],
    "resource": "Building A - Floor 3",
    "access_level": "visitor",
    "valid_until": "2026-01-25T18:00:00Z"
}

Best Practices¶

Be specific with types - Use clear, descriptive type values that indicate the purpose
Include relevant context - Add properties that help users understand what they're consenting to
Match credential_ids - Ensure the credential_ids reference valid credentials from your DCQL query
Keep it minimal - Only include information necessary for informed consent