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World Congress 2025 • Aug 20, 2025 • Session details

Justice for All! Diving into JsTz, a Native JavaScript Environment for Web3 Development

Arthur Breitman

Ditch proprietary smart contract stacks for a native V8 JavaScript engine. JsTz lets you build decentralized applications using familiar Node environments, asynchronous execution, and standard NPM libraries.

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#1 about 2 min

Introduction to native JavaScript execution on Tezos

JSTZ operates as a layer two solution providing an uncompiled, native JavaScript environment.

#2 about 2 min

Why JavaScript is the target for Web3 development

The massive global developer base and rich tooling ecosystem make JavaScript ideal for large language model code generation.

#3 about 2 min

Evaluating previous attempts at JavaScript smart contracts

Previous smart contract approaches relied on custom domain-specific languages or limited feature subsets rather than pure execution.

#4 about 2 min

Replicating standard web development with native V8 execution

JSTZ maintains standard HTTP request patterns and asynchronous execution to provide a familiar serverless development environment.

#5 about 2 min

Integrating npm packages and standard testing frameworks

Developers bundle dependencies directly and utilize typical CLI tooling and Chrome inspector protocols without web3-specific setups.

#6 about 2 min

Secure API calls using trusted execution environments

Built-in oracle services allow applications to fetch real-world data and external APIs transparently.

#7 about 2 min

Account abstraction for simplified social and biometric login

Native protocol support for passkeys and biometric authentication removes the user friction of managing wallet seed phrases.

#8 about 2 min

Sponsoring operations for frictionless application onboarding

Sponsored operations let users interact with decentralized applications without acquiring tokens or paying gas fees up front.

#9 about 3 min

Integrated cross-chain bridging and unified distributed liquidity

Built-in networking allows seamless asset transfers and multi-chain capabilities without relying on third-party bridge setups.

#10 about 2 min

Leveraging EtherLink for cross-compatibility with EVM tools

Connecting with the EVM layer grants JavaScript applications access to established exchange protocols and auditing solutions.

#11 about 3 min

Testnet deployment and the developer feedback roadmap

Access to private networks using Deno and V8 APIs provides early testing before mainnet maturation.

#12 about 3 min

Adopting a hybrid progressive rollout for product maturity

Unlike entirely non-custodial rollups, JSTZ uses a structured deployment to test trusted enclaves and adapt to new use cases iteratively.

#13 about 1 min

Joining the ecosystem and developer community resources

Connect via the web portal to experiment with network integration and provide platform feedback.

Matching moments

3:20 min

Decentralized applications and EVM compatibility on Tezos layer two

Arthur Breitman Arthur Breitman +2 · WWC 2024

1:53 min

Bringing JavaScript developers into web artificial intelligence

Jason Mayes · Coffee With Developers

5:27 min

Overview of the Lisk blockchain and JavaScript SDK

Nazar Hussain · LIVE

1:14 min

Enabling cross-language library interoperability with the JSII framework

Markus Ziller Markus Ziller · WWC 2024

2:33 min

Expanding JavaScript horizons with WebAssembly and backend possibilities

Sasha Shynkevich · LIVE

1:47 min

Implementing unified platform web standard APIs inside backend environments

Alfonso Graziano Alfonso Graziano · WWC Europe 2026

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