Coin Dance

Enable OP_2MUL & OP_2DIV

 nChain

It would decrease the script sizes for elliptic curve operations.

Restore the original 2016 blocks DAA

 nChain

Restoring the difficulty adjustment algorithm to the original 2016 blocks interval.

Establish symbol for the Satoshi (unit)

Increase or remove unconfirmed ancestor limit

 nChain

Enable faster spending of UTXOs.

Remove the dust limit

 nChain

Secondary Mempool

 nChain

Improves the ability for honest miners to respect the first-seen rule by retaining low-fee transactions that would normally be ignored.

Enable OP_VER

 nChain

Enables secondary consensus rules. Scheduled to be re-enabled in Chronicle update (expected early-mid 2021)

Bitcoin Server Network aka Teranode

 nChain

Focuses on communications between enterprise-tier servers rather than the “P2P” interactions people often refer to. To do this, nChain developers have “gone back to the beginning,” identifying blockchain users and their needs. This included big data paradigms and horizontal scaling.

Re-enable IP to IP payments

 nChain

The original version of the Bitcoin node client had the facility to conduct IP to IP payments where a receiver could give a payer their IP address. New payment processes are in development and will allow network peers to interact securely using cryptographically verified IP addresses.

Accumulator Multisig

 nChain

Incremental Block Building

 nChain

Compact Merkle Tree Proofs

 nChain

Original idea described in https://www.yours.org/content/the-infinite-stream-of-transactions-attack-that-isn-t-ddf01a5e3787 (updated link: https://shilch.me/the-infinite-stream-of-transactions-attack-that-isnt/)

Merchant Services API

 nChain

Allow miners to provide additional services for companies to leverage.

Miner Pseudo ID

 nChain

Allow miners to establish cryptographically-verifiable reputations.

Full support for the original sighash algo

 nChain

Would allow to spend any existing utxo with the original Bitcoin sighash algorithm and undo the strong replay protection with BTC

Parallel block validation

 nChain

Default to an unlimited block size

 nChain

This limit will still exist as a configuration option for miners however the default will be changed to no limit at all. After Genesis it will be a miners responsibility to manage this limit if they choose to impose it at all.

Replace 32 math op codes with BigNum version

 nChain

Limited support for original sighash algo

 nChain

Limited support for the original sighash algorithm to ensure any legacy transaction that have been kept offline become valid on BSV again.

Allow non-standard scripts

 nChain

Current Bitcoin Node accept non-standard TX in Block, it just reject non-standard TX received from p2p network. So it's campatible with existing consensus, new Node pack non-standard TX in block, old Node don't. But they both accept non-standard TX in block.

Remove P2SH from Standard

 nChain

Sunsetting P2SH is part of the Genesis upgrade

Restoration of OP_RETURN functionality

 nChain

Restoration of original OP_RETURN functionality (with a fix for the OP_1 OP_RETURN vulnerability)

Changes to OP_RETURN

 nChain

Our next roadmap article will describe the upcoming changes to OP_RETURN because this is a change we want the Bitcoin ecosystem to be aware of as far in advance as possible. The mechanism of that change is what this post is about and the reason we explain it separately is because it is a concept we will be reusing in many ways.

Parallel Transaction Validation

 nChain

BIP 270

 nChain

P2P payments where the receiver is responsible for broadcasting transactions.

Paymail

 nChain

Paymail is a way of attaching a human-readable names to authenticated services based on OpenCAP, enabling signatures, encryption, and legal contracts on chain.

Raise OP_RETURN limit to 100kB

 nChain

Update the soft cap limit of OP_RETURNs to 100kB.

This was made the default in Bitcoin SV v0.2.0.

Increase the default max block size to 2GB

 nChain

Consider all blocks in size up to 2GB to be valid by default.

Implemented optional fixed broadcastdelay

 nChain

Added broadcastdelay configuration parameter. Sets the number of milliseconds to wait before relaying transactions. When set, this replaces the random delay.

Increase the default max block size to 128MB

 nChain

Consider all blocks in size up to 128MB to be valid by default.

Script Instructions Restriction

 nChain

Loosen the restriction on the number of instructions executed per script (currently 201) to 500.

Restore OP Codes

 nChain

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