113 - Median time-past as endpoint for lock-time calculations
BIP: 113 source Layer: Consensus (soft fork) Title: Median time-past as endpoint for lock-time calculations Authors: Thomas Kerin Mark Friedenbach Status: Deployed Type: Specification Assigned: 2015-08-10 License: PD Table of ContentsAbstractMotivationSpecificationDeploymentAcknowledgementsCompatibilityReferencesCopyright 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 for miners to lie about the time of their blocks in orde...
67 - Deterministic Pay-to-script-hash multi-signature addresses through public key sorting
BIP: 67 source Layer: Applications Title: Deterministic Pay-to-script-hash multi-signature addresses through public key sorting Authors: Thomas Kerin Jean-Pierre Rupp Ruben de Vries Status: Complete Type: Specification Assigned: 2015-02-08 License: PD Table of ContentsAbstractMotivationSpecificationCompatibilityTest vectorsAcknowledgementsUsage & ImplementationsReferencesCopyright 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[1]) is a transaction type that allows funding of arbitrary scripts, where the recipient carries the cost of fee's associated with using longer, more complex scripts. Multi-signature pay-to-script-hash trans...
123 - BIP Classification
BIP: 123 source Title: BIP Classification Authors: Eric Lombrozo Status: Deployed Type: Process Assigned: 2015-08-26 License: CC0-1.0 OR FSFAP Table of ContentsAbstractCopyrightMotivationSpecification1. Consensus LayerSoft ForksHard Forks2. Peer Services Layer3. API/RPC Layer4. Applications LayerClassification of existing BIPs 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 FSF 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 implementers a choice of whether to su...