- Transactions with version number set to 3 are now treated as standard on all networks (#29496), subject to Opt-in Topologically Restricted Until Confirmation (TRUC) Transactions policy as described in BIP 431. The policy includes limits on spending unconfirmed outputs (#28948), eviction of a previous descendant if a more incentive-compatible one is submitted (#29306), and a maximum transaction size of 10,000vB (#29873). These restrictions simplify the assessment of incentive compatibility of accepting or replacing TRUC transactions, thus ensuring any replacements are more profitable for the node and making fee-bumping more reliable.