BIPs bitcoin improvement proposals

140 - Normalized TXID

<pre> BIP: 140 Layer: Consensus (soft fork) Title: Normalized TXID Author: Christian Decker <decker.christian@gmail.com> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0140 Status: Rejected Type: Standards Track Created: 2015-10-14 License: PD </pre> == Abstract == This BIP describes the use of normalized transaction IDs (NTXIDs) in order to eliminate transaction malleability, both in the third-party modification scenario as well as the participant modification scenario. The transaction ID is normalized by removing the signature scripts from transactions before computing its hash. The normalized transaction hashes are then used during the signature creation and signature verification of dependent transactions. == Motivation == Transaction malleability refers to the fact that transactions can be modified, either by one of the signers by re-signing the transaction or a third-party by modifying the signature repre...

118 - SIGHASH_ANYPREVOUT for Taproot Scripts

<pre> BIP: 118 Layer: Consensus (soft fork) Title: SIGHASH_ANYPREVOUT for Taproot Scripts Author: Christian Decker <decker.christian@gmail.com> Anthony Towns <aj@erisian.com.au> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0118 Status: Draft Type: Standards Track Created: 2017-02-28 License: BSD-3-Clause Requires: 340, 341, 342 </pre> == Introduction == === Abstract === This BIP describes a new type of public key for tapscript ([[bip-0342.mediawiki|BIP 342]]) transactions. It allows signatures for these public keys to not commit to the exact UTXO being spent. This enables dynamic binding of transactions to different UTXOs, provided they have compatible scripts. === Copyright === This document is licensed under the 3-clause BSD license. === Motivation === Off-chain protocols make use of transactions that are not yet broadcast to the Bitcoin network in order to renegotiate the final state that sh...