2025 Bitcoin Cash Improvement Proposals

On behalf of Bitauth IDE, Chaingraph, and Libauth, I'm endorsing two Bitcoin Cash Improvement Proposals (CHIPs) for the 2025 upgrade cycle:

• CHIP-2021-05 VM Limits: Targeted Virtual Machine Limits
• CHIP-2024-07 BigInt: High-Precision Arithmetic for Bitcoin Cash

For the VM Limits CHIP, I submit this statement:

The VM Limits CHIP retargets Bitcoin Cash's Denial-of-Service limits to extend compute for real contracts by more than 100x while reducing worst-case node compute usage by 50%. By reducing overhead, the retargeted limits simplify contracts, reduce transaction sizes, streamline contract audits, and improve overall security.

By improving contract efficiency, this upgrade also makes important use cases more practical, including post-quantum cryptography, stronger escrow and settlement strategies, zero-knowledge proofs, homomorphic encryption, and other crucial innovations for the future security and competitiveness of Bitcoin Cash.

Finally, this upgrade raises the bar by contributing new tooling and a cross-implementation benchmarking methodology to continuously verify node performance. Beyond empirically verifying the safety and correctness of the upgrade, these tools will simplify development of new production-ready implementations, prevent regressions in existing implementations, and reduce the cost of verifying implementation-specific software updates.

I'm confident in the extensive cross-implementation testing and verification performed for this CHIP, and I recommend activation in Bitcoin Cash's 2025 upgrade.

— Jason Dreyzehner, Bitauth IDE, Chaingraph, Libauth

For the BigInt CHIP, I submit this statement:

The BigInt CHIP enables high-precision math for Bitcoin Cash, offering over 10x reductions in contract lengths and making previously-theoretical use cases immediately practical: more advanced automated market making and exchange protocols, decentralized stablecoins, collateralized loan protocols, cross-chain and sidechain bridges, zero-knowledge proofs, post-quantum cryptography, homomorphic encryption, and more.

This upgrade takes full advantage of Bitcoin Cash's fundamentally more scalable architecture to offer math capabilities which exceed those of Ethereum: "bare metal" performance, more byte-efficient transactions, far lower transaction fees, and protocol-level simplicity that eliminates whole classes of Ethereum contract vulnerabilities. These capabilities are available to Bitcoin Cash contracts on "layer one" – ensuring security, censorship resistance, and cross-contract compatibility – without increasing compute requirements: fully-archiving Bitcoin Cash nodes can continue to run on inexpensive, consumer hardware.

I'm confident in the extensive cross-implementation testing and verification performed for this CHIP, and I recommend activation in Bitcoin Cash's 2025 upgrade.

— Jason Dreyzehner, Bitauth IDE, Chaingraph, Libauth

I encourage all Bitcoin Cash users, businesses, and organizations to submit public approval statements to help demonstrate wide ecosystem support for lock-in before November 15, 2024:

• Submit a statement for VM Limits CHIP →
• Submit a statement for BigInt CHIP →

October 3, 2024: expanded statements, latest revision emailed to subscribers.