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Coin Dance

Bitcoin Cash Platform & Protocol Development

11 Under Discussion

17 Under Development

2 Pending Activation

20 Completed

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Under Development

Bitcoin Cash Proposals Currently Under Development or Under Preliminary Discussion

Under Discussion
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Mandatory CashAddr for P2SH

 

Refuse sending BCH transactions to addresses starting with a 3.

Last Updated:
2 months ago
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Under Discussion
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Blocktorrent

 

Blocktorrent is a method for breaking a block into small independently verifiable chunks for transmission, where each chunk is about one IP packet (a bit less than 1500 bytes) in size. In the same way that Bittorrent was faster than Napster, Blocktorrent should be faster than Xthin(ner).

Last Updated:
3 months ago
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Under Discussion
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Metadata Subtree

 Bitcoin ABC | Lokad SAS

Support for better, more detailed block-level metadata.

Last Updated:
3 months ago
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Merklix Trees

 Bitcoin ABC | Lokad SAS

Last Updated:
3 months ago
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Under Discussion
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Time Delay Penalty Based on Multiple Blocks

 

Prevent deep re-org attacks by penalizing alternate chaintips by a factor that is calculated by averaging the delays (in seconds) of each opposing block.

Last Updated:
3 months ago
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Under Discussion
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Avalanche

 Team Rocket

Allow miners to come to consensus on double spend transactions before they have been mined into a block (pre-consensus).

Last Updated:
4 months ago
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Revised DAA (w/ PID control)

 Bitcoin ABC | Bitcoin XT

Revise Difficulty Adjustment Algorithm to further improve block times using a new PID control algorithm

Last Updated:
4 months ago
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Bobtail

 

A Proof-of-Work Target that Minimizes Blockchain Mining Variance

Last Updated:
4 months ago
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One Way Aggregate Signatures

 Electron Cash

A non-interactive fungibility solution for transactional privacy.

Last Updated:
4 months ago
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Under Discussion
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Improved 0-conf via security deposits

 Bitcoin Unlimited

the consumer will make a special ZCF transaction that pays the merchant and simultaneously posts a security deposit. If the transaction is honest, the consumer can later reclaim his deposit. If he tries to double spend, he necessarily reveals a second signature over the same public key which is then used by miners to claim his deposit for themselves. Pretty clever!

Last Updated:
4 months ago
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Switch standard denomination to 'bits'

 

Switch the standard denomination of Bitcoin Cash to 'bits' (1 millionth of a Bitcoin) and switch the ticker from 'BCH' to 'BIT'.

Last Updated:
4 months ago
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Xthinner

 Independent

Improved xthin that leverages canonical block ordering.

Last Updated:
1 week ago
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Under Development
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OpenCAP alias protocol

 Independent

OpenCAP is a protocol that defines the standard by which cryptocurrency wallets can communicate with servers to relate aliases to cryptocurrency addresses.

The protocol allows for the decentralization of the alias -> address relationship.

Last Updated:
1 week ago
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Increase unconfirmed ancestor limit

 Bitcoin.com

Enable faster spending of UTXOs.

Last Updated:
1 week ago
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Restore OP Codes

 Bitcoin Unlimited | Bitcoin ABC

Re-activate the following additional opcodes: OP_MUL, OP_LSHIFT, OP_RSHIFT, and OP_INVERT.

Last Updated:
1 month ago
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Allow <100 byte txs except those of 64 bytes

 Bitcoin ABC

This rule prevents a hash griding attack, where SPV wallets can confuse a 64 byte transaction for a merkle node. The amount of entropy in each 32-byte sections of the transaction is insufficient to prevent a preimage attack. In this case, a valid transaction could be found with a hash equal to the first, or last, 32 bytes of a 64-byte transaction.

Last Updated:
1 month ago
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Enable Schnorr Signatures on OP_CHECKMULTISIG

 Bitcoin ABC

OP_CHECKMULTISIG and OP_CHECKMULTISIGVERIFY will be upgraded to accept Schnorr signatures in a way that is compatible with batch verification.

Last Updated:
1 month ago
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CashDB

 Lokad SAS

CashDB delivers a specialized storage dedicated to the UTXO dataset of Bitcoin Cash. This component is intended to support livechain apps such as Bitcoin ABC or ElectrumX.

Last Updated:
3 months ago
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Maxblocksize Based on Median Block Size

 Bitcoin Unlimited

The basic idea is that we look at recent block history. We calculate recent usage and use it to set a new limit that is much higher. We adjust every time a new block is found. With this the blocks are unlikely to ever go full, even at load peaks.

Last Updated:
3 months ago
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Bi-directional Overlay Network

 BCHD

A generic overlay network based on IPFS’s libp2p.

Last Updated:
4 months ago
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Under Development
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OpenSwap (atomic swaps)

 Electron Cash

Atomic swaps using Electron Cash.

Last Updated:
4 months ago
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Under Development
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Enforce minimal pushdata

 Bitcoin ABC

As per existing standardness checks, enforce that all pushed data is a minimal representation at the script layer.

Last Updated:
4 months ago
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Graphene v2

 Bitcoin Unlimited

Introduce a set of improvements (phase 1) and extensions (phase 2) to improve both the performance and functionality of the Graphene block relay protocol.

Last Updated:
4 months ago
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CompactBlocks

 Bitcoin Unlimited

Supporting CB in BU would strengthen the connections between the BU peers and the rest of the network, without having to rely on intermediates.

Last Updated:
4 months ago
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Enforce NULLDUMMY (BIP 147)

 Bitcoin ABC

As per BIP 147, enforce that the dummy element in OP_CHECKMULSIG(VERIFY) is a null stack element. This will go into effect at the consensus layer.

Last Updated:
4 months ago
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Modified fee structure

 Bitcoin ABC

Modified fee structure to allow for an order of magnitude decrease in fees for typical transactions (not strictly a consensus change, but an important change being included with the release).

Last Updated:
4 months ago
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BUIP087 nomenclature for 1/1,000,000 BCH

 Bitcoin Unlimited

Add "cash" in addition to "bit" as a term for 100 (one hundred) satoshi or 1/1,000,000 (one one-millionth) of a bitcoin cash BCH (i.e. 0.000001 BCH). Further, we propose the unofficial ISO code "XCH" to represent a cash unit (millionth of a BCH unit). -- UPDATE: For French translations only.

Last Updated:
4 months ago
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UTXO commitments

 Bitcoin ABC | bitCrust

The construction of a 32-byte hash that is uniquely defined for a UTXO set, that is, the set of all unspent transaction outputs that exist at a certain block in the blockchain

Last Updated:
4 months ago
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Completed

Bitcoin Cash Proposals Either Completed or Currently Pending Activation on Mainnet

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SegWit Recovery Exception

 Bitcoin ABC

With the last protocol upgrade, the enforcement of the CLEANSTACK rule made it impossible to recover funds from Segwit transactions. With the upgrade, there will be an exception to this rule to enable recovery of these funds once again.

Last Updated:
1 month ago
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Pending Activation
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Enable Schnorr signatures

 Bitcoin ABC

Schnorr signatures are provably non-malleable and allow multiple parties can collaborate to produce a signature that is valid for the sum of their public keys. This is the building block for various higher-level constructions that improve efficiency and privacy.

Last Updated:
1 month ago
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Completed
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Neutrino (BIP 157 & BIP 158)

 BCHD

Implemented as part of the Neutrino Wallet for Bitcoin Cash, Neutrino (BIP 157 & BIP 158) allows the creation of lightweight SPV wallets with strong network level privacy.

Last Updated:
2 weeks ago
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Cash ID

 

CashID is an open protocol that allows secure authentication based on the public key cryptography infrastructure that is currently present in the Bitcoin Cash ecosystem. Each user can prove to a service provider that they control a specific Bitcoin Cash address by signing a challenge request, as well as provide optional metadata.

Last Updated:
3 weeks ago
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CashShuffle

 Electron Cash

CashShuffle is a protocol for allowing users to combine their transactions with others, creating obfuscation. It builds upon CoinShuffle and adds a matching service. As such, it is a more complete and usable protocol.

Last Updated:
1 month ago
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Simple Ledger Protocol

 Electron Cash

Simple Ledger Protocol (SLP) uses the meta data in OP_RETURN for the issuance and transfer of tokens in conjunction with standard transaction outputs that each represent a number of token units specified by the sender.

Last Updated:
1 month ago
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Revised DAA

 Bitcoin ABC

Revise Difficulty Adjustment Algorithm

Last Updated:
1 month ago
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Fast Sync via IPFS

 BCHD

Support faster syncing by downloading a previous UTXO set from IPFS.

Last Updated:
3 months ago
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Cash Accounts

 Electron Cash

Cash Accounts is a naming system that can be used alongside regular bitcoin addresses and payment codes to simplify the process of sharing payment information.

Last Updated:
3 months ago
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Graphene v1

 Bitcoin Unlimited

An efficient method of announcing new blocks.

Last Updated:
4 months ago
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XVersionMessage

 Bitcoin Unlimited

BCH node extended version and configuration fields for transporting a generic key-value map that is meant to hold the configuration and version parameters to communicate capabilities with other nodes (such as transmission protocols like Graphene).

Last Updated:
4 months ago
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Enforce Push-Only for scriptSig

 Bitcoin ABC

Transactions shall be considered invalid if an opcode with number greater than 96 (hex encoding 0x60) appears in a scriptSig.

Last Updated:
4 months ago
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Clean Stack

 Bitcoin ABC

For a transaction to be valid, only a single non-zero item must remain on the stack upon completion of Script evaluation. If any extra data elements remain on the stack, the script evaluates to false. This is the same as BIP 62 rule #6.

Last Updated:
4 months ago
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Generalized version bits voting (BIP 135)

 Bitcoin Unlimited

BIP 135 extends the semantics of the signaling bits to cover arbitrary consensus changes, referred to under the general term 'forks'. The same range of version bits is used for signaling.

Last Updated:
4 months ago
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OP_CHECKDATASIG

 Bitcoin Unlimited | Bitcoin ABC

OP_CHECKDATASIG and OP_CHECKDATASIGVERIFY check whether a signature is valid with respect to a message and a public key. OP_CHECKDATASIG permits data to be imported into a script, and have its validity checked against some signing authority such as an "Oracle".

Last Updated:
4 months ago
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Re-enable Satoshi Opcodes

 Bitcoin ABC | nChain

Re-enable the previously disabled opcodes which were part of the original Bitcoin design. This should enable smart contract compilers, and a variety of functionality on Bitcoin Cash.

Last Updated:
4 months ago
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Default to 32MB blocks

 Bitcoin ABC

Start accepting blocks up to 32MB by default.

Last Updated:
4 months ago
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Increase default datacarriersize to 220 bytes

 Bitcoin ABC

To disincentivize the use of other methods to embed data into the chain, in particular via P2SH, the default datacarriersize is raised from 80 byte to 220 bytes, so it becomes the "cheapest" way of embedding data into the chain.

Last Updated:
4 months ago
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Double spend proof creation and forwarding

 Bitcoin Unlimited

Update to inform other nodes of double spend attempts immediately to improve the reliability of 0-conf transactions.

Last Updated:
4 months ago
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Base32 addresses

 Bitcoin ABC | Bitcoin XT | Copay (Bitpay)

Support Base32 address format

Last Updated:
4 months ago
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Enforce minimum transaction size

 Bitcoin ABC

Transactions that are smaller than 100 bytes shall be considered invalid. This protects against a Merkle tree vulnerability that allows attackers to spoof transactions against SPV wallets.

Last Updated:
4 months ago
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Canonical Transaction Ordering

 Bitcoin ABC | Bitcoin XT

With the exception of the coinbase transaction, transactions within a block must be sorted in numerically ascending order of the transaction id. This proposal is also known as Lexical Transaction Order. It simultaneously removes the existing Topological Transaction Order constraint.

Last Updated:
4 months ago
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