Network, Relay & Client Sync • Estimated 55m

Version 3 Transaction Relay

protocol.version-3-transaction-relay

Version 3 transaction relay, also called TRUC, adds opt-in relay rules that restrict unconfirmed transaction topology to reduce pinning attacks and make fee-bumping more reliable for contract protocols. It is a policy-layer relay mechanism rather than a consensus change.

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Curated resources (3)

• Bitcoin Optech Topic: Version 3 Transaction Relay (article) Canonical overview of TRUC, its anti-pinning goals, and its relationship to package relay and ephemeral anchors.
• BIP 431: Topology Restrictions for Pinning (article) Primary specification for TRUC transaction signaling, topology limits, and intended fee-bumping behavior.
• Mastering Bitcoin (book) Broad technical reference for transaction relay, fee-bumping, and mempool policy context.

Direct prerequisites (1)

• Transaction Pinning

Direct dependents (0)

• None

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