Machine-readable reasons a payment failed verification (v1.2 §5.4).
REFERENCE_MISMATCH is the v1.2 addition: the transaction exists but
is not an execution of THIS request. Fail-safe rule for consumers:
unknown runtime values MUST be treated as REJECTED (never as
success).
Machine-readable reasons a payment failed verification (v1.2 §5.4).
REFERENCE_MISMATCHis the v1.2 addition: the transaction exists but is not an execution of THIS request. Fail-safe rule for consumers: unknown runtime values MUST be treated asREJECTED(never as success).