BIPs bitcoin improvement proposals

113 - Median time-past as endpoint for lock-time calculations

<pre> BIP: 113 Layer: Consensus (soft fork) Title: Median time-past as endpoint for lock-time calculations Author: Thomas Kerin <me@thomaskerin.io> Mark Friedenbach <mark@friedenbach.org> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0113 Status: Final Type: Standards Track Created: 2015-08-10 License: PD </pre> ==Abstract== This BIP is a proposal to redefine the semantics used in determining a time-locked transaction's eligibility for inclusion in a block. The median of the last 11 blocks is used instead of the block's timestamp, ensuring that it increases monotonically with each block. ==Motivation== At present, transactions are excluded from inclusion in a block if the present time or block height is less than or equal to that specified in the locktime. Since the consensus rules do not mandate strict ordering of block timestamps, this has the unfortunate outcome of creating a perverse incentive ...

67 - Deterministic Pay-to-script-hash multi-signature addresses through public key sorting

<pre> BIP: 67 Layer: Applications Title: Deterministic Pay-to-script-hash multi-signature addresses through public key sorting Author: Thomas Kerin <me@thomaskerin.io> Jean-Pierre Rupp <root@haskoin.com> Ruben de Vries <ruben@rubensayshi.com> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0067 Status: Proposed Type: Standards Track Created: 2015-02-08 License: PD </pre> ==Abstract== This BIP describes a method to deterministically generate multi-signature pay-to-script-hash transaction scripts. It focuses on defining how the public keys must be encoded and sorted so that the redeem script and corresponding P2SH address are always the same for a given set of keys and number of required signatures. ==Motivation== Pay-to-script-hash (BIP-0011<ref>[https://github.com/bitcoin/bips/blob/master/bip-0011.mediawiki BIP-0011]</ref>) is a transaction type that allows funding of arbitrary scripts, wher...

123 - BIP Classification

<pre> BIP: 123 Title: BIP Classification Author: Eric Lombrozo <elombrozo@gmail.com> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0123 Status: Active Type: Process Created: 2015-08-26 License: CC0-1.0 GNU-All-Permissive </pre> ==Abstract== This document describes a classification scheme for BIPs. BIPs are classified by system layers with lower numbered layers involving more intricate interoperability requirements. The specification defines the layers and sets forth specific criteria for deciding to which layer a particular standards BIP belongs. ==Copyright== This BIP is dual-licensed under the Creative Commons CC0 1.0 Universal and GNU All-Permissive licenses. ==Motivation== Bitcoin is a system involving a number of different standards. Some standards are absolute requirements for interoperability while others can be considered optional, giving implementors a choice of whether to support them. ...