Intro
ParyonUSD was announced at the Bliss 2025 conference, now 2.5 months later on BCH Day, it seems like a great time for us to fill everyone in with a ‘Development Update’ of what we’ve been up to! But first of all: happy BCH Day everyone! 🎉
State of Development
Development on ParyonUSD has been going great! There’s a lot of ground to cover with many moving parts, to give you an idea here’s the main parts:
- the ParyonUSD smart contracts
- the ParyonUSD TypeScript library
- the ParyonUSD web platform
- the ParyonUSD transaction server
- the ParyonUSD interest manager
- the ParyonUSD monitoring dashboard
- the ParyonUSD chipnet setup
Our full techstack is leveraging TypeScript, with the exception of the smart contracts which are written in CashScript.
The ParyonUSD transaction server is using the TypeScript Effect library/framework for best safety practices in error handling and testability.
Advancing the Ecosystem
With ParyonUSD we have the explicit goal of advancing the Bitcoin Cash and CashTokens ecosystem. While developing solutions we keep it in front-of-mind to enable others to use the solutions also. A recent example of this is the WalletConnect integration into CashScript (as part of v0.11.1 and v0.11.2) which will make development much easier for other builders also.
ParyonUSD smart contract development has inspired a list of improvements for CashScript. Recently new .slice(x, y) syntax was introduced as an alternative to .split(x)[1].split(y-x)[0] and better type safety when using .split or .slice in the language.
We also created a chaingraph-ts library to share our learnings from working with ChainGraph for ParyonUSD.
Additionally as part of ParyonUSD development we’re also making improvements to Cashonize on an ongoing basis.
BCH Indexers
Early on in ParyonUSD development we started leveraging the advanced capabilities of the ChainGraph indexer to enable arbitrary queries and subscriptions to Bitcoin Cash blockchain info. However, while ChainGraph providers very powerful new capabilities, it is currently undergoing a full rewrite to a new database backend and is generally not stable enough to be powering an application with high reliability requirements like ParyonUSD.
Recently after extended internal usage we have decided to exclusively rely on Electrum Indexers (Fulcrum) for the core ParyonUSD functionality while separating the ChainGraph usage into an extension class which enables optional “nice-to-have” details like user history and historical loan info.
This dual-indexer usage guarantees ParyonUSD can meet high-reliability requirements while also being able to offer advanced features which do not have the strict requirements of the core functionality. This way ParyonUSD will be able to offer both high-reliability as well as detailed insights for users about historical loan info and user history (for loans, staking and redemptions).
BCH Network Upgrades
ParyonUSD does not require any BCH Network upgrades. As ParyonUSD is planned for Q4 2025 it wouldn’t be using any new features introduced later. The proposal which would likely have the largest benefit for DeFi projects like ParyonUSD is a reduction in blocktimes. We’ll explore the impact of blocktime on BCH DeFi in more detail in our whitepaper.
The pay-to-script CHIP which extends the maximum nft-commitment length would also have benefitted ParyonUSD’s design somewhat by removing the need for state side-cars when nft state exceeds the current 40-bytes limit.
What’s next?
We plan to start writing our whitepaper and have a running smart contract code audit over the coming month. At this stage we’ll mainly be focusing on internal testing of all the components and their interactions.
BCH Day
Today, on August 1st 2025, Bitcoin Cash turns 8 years old. It’s been quite a journey and not without its bumps in the road. The past few years however the trajectory has been remarkably steady with regular big, impactful improvements to the network. In the coming 2 years for BCH’s 10th anniversary, we expect BCH DeFi to take off in big ways. Not just ParyonUSD as a single dapp but the whole interoperable CashTokens ecosystem with many wallets, DEXes, lending & borrowing platforms, marketplaces and more. In the chaotic crypto industry with experimentation in all directions, this focus and alignment of the BCH ecosystem will prove to be one of its main selling points.
Happy BCH Day everyone 💚, let us take all the BCH growth and usage graphs up and to the right! 📈
Join the Conversation
Stay informed about our progress and dive deeper into the details of the ParyonUSD project by following our updates. We invite you to be part of the discussion and join the community.
- Follow ParyonUSD on X: x.com/ParyonUSD
- Join the ParyonUSD group on Telegram: t.me/ParyonUSD
In our Telegram group, you’ll have the opportunity to engage directly with the team and developers—ask questions, share your thoughts, and be part of the ongoing conversation as we build ParyonUSD together!