DRA

eCash Open Discussion X Space - July 15, 2026

July 15, 2026Original source

On July 15, 2026, Paul hosted an eCash Open Discussion X Space with community participants covering eCash launch preparation, Drivechain and BIP300/301 sidechain design, programmable L2s, high-volume fee economics, and modular Bitcoin upgrades through CUSF.

Highlights

Key Takeaways

CUSF as a modular upgrade path

The discussion outlined how CUSF, or Core Untouched Soft Fork, could preserve close compatibility with Bitcoin Core while placing new consensus features in separate, replaceable software. A second CUSF client introduced four quantum-resistant signature options, with OP_CAT, OP_CTV, and OpVault among the additions considered across current or future clients. This modular structure lets eCash inherit upstream Bitcoin changes, minimize modifications to its L1 codebase, and support both conservative and experimental configurations. Multiple CUSF clients could therefore form a maintainable stack of optional upgrades without burdening the base client.

A programmable sidechain model

Participants examined a proposed smart-contract sidechain under BIP300/301, including the commitments needed to connect its blocks securely to L1. The design combined rapid pre-consensus, native two-minute blocks, and five-block bundles settling to L1 every ten minutes, giving users several confirmation levels suited to different transactions. Its economic model separated a universal base fee paid to L1 miners from programmable contract fees that could support developers and an L2 treasury. The broader Drivechain architecture remained open to specialized chains, an EVM implementation, and additional designs created by independent teams.

Scale through specialized chains and volume

The Space connected eCash launch preparation with a widening Drivechain ecosystem already encompassing Signet deployments, dry runs, Elements Plus, an EVM sidechain, privacy-oriented systems, and BitAssets. Speakers emphasized that abundant low-cost transactions can provide miners with substantial aggregate fee revenue, making throughput more productive than treating block space solely as a luxury product. Community testing, wallet development, Discord coordination, and mobile and web distribution were discussed as practical parts of shipping the system. Together, BIP300/301 sidechains and Blind Merged Mining offered a path for diverse applications to contribute fees while keeping L1 focused and stable.