tx_code sent in the Token Request when offered

OID4VCI 1.0 §4.1.1 and 6.1MUSTRoles: wallet

Requirement as recorded in the ProtocolSoup registry

If the Wallet decides to use the Pre-Authorized Code Flow and a tx_code object was present in the Credential Offer (including if empty), the Transaction Code value MUST be sent in the Token Request tx_code parameter as defined in Section 6.1.

Read §4.1.1 and 6.1 in OID4VCI 1.0

Self-test verdict

PassCommit 97df6a8Evaluated 2026-10-11

This is ProtocolSoup's result against its own implementation at the commit shown. It is not a certification of ProtocolSoup or of any other product.

Tests

TestIssueFromExternalIssuerRequiresTxCode
./cmd/walletharness
Pass

Implementation

backend/cmd/walletharness/oid4vci_external.go

Related requirements

CW-001credential_offer not present when credential_offer_uri is present CI-014Pre-authorized code single use and tx_code error mapping

All OID4VCI 1.0 requirements · OID4VCI protocol page