433 - Pay to Anchor (P2A)
BIP: 433 source Layer: Applications Title: Pay to Anchor (P2A) Author: Gregory Sanders Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0433 Status: Draft Type: Informational Created: 2025-12-08 License: BSD-3-Clause Post-History: 2024-06-27: https://github.com/bitcoin/bitcoin/pull/30352 Github PR 2024-10-10: https://bitcoinops.org/en/bitcoin-core-28-wallet-integration-guide/ wallet integration guide Table of ContentsAbstractMotivationSpecificationImplementationRelated WorkBackward CompatibilityAcknowledgementsReferences and Rationale Abstract This document describes a new standard output script called Pay to Anchor (P2A) and prescribes making spending of this output type standard. This output is "keyless" meaning no signature or witness data at all are required to spend this output typea. Motivation The "anchor" output type is a commonly used pattern in Bitcoin layer 2 systems such as Lightning Network and beyond. This pattern allows ...