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WebAssembly

A portable, near-native-speed binary instruction format that several blockchains use as their smart contract execution engine.

FBFenwei BianAuthorVZVictor ZhouEditorJuly 2, 2026
  • glossary

WebAssembly (Wasm) is "a binary instruction format for a stack-based virtual machine," originally built as "a portable compilation target for programming languages" that "aims to execute at native speed" in browsers and servers. Several blockchain ecosystems reuse this general-purpose, battle-tested runtime as their smart contract engine instead of designing a bespoke bytecode format: CosmWasm, the dominant platform across Cosmos SDK chains such as Osmosis, Neutron, and Injective, compiles smart contracts written in Rust down to Wasm and executes them on an optimized Wasm runtime. Using Wasm means any language with a Wasm compiler — Rust, C, C++, Go — can, in principle, target the chain, in contrast to Ethereum's Solidity-first EVM. For Web3 infrastructure built on-chain, including tokenized assets, the choice between a Wasm-based VM and the EVM affects which developer tooling and existing contracts port over without a rewrite.

Related keywords

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  • stack-based virtual machine
  • WebAssembly
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Contributors

Fenwei Bian

Software Developer & Writer • Namefi
Author

Fenwei Bian is a software developer in her thirties who spends her working hours in pull requests and her weekends with her hands in soil or sawdust. Years of open source on GitHub taught her that names are interfaces: a good one is clear, honest about what it does, and kind to whoever has to use it next.

She gardens because it rewards patience and punishes wishful thinking, and she does woodwork because a joint either fits or it doesn't. Both habits show up in how she writes about naming — measure twice, check the source, and don't sand over a rough spot and hope no one notices.

For Namefi she writes about how domain markets actually move, the practical trade-offs of tokenizing and flipping names, and picking a domain you'll still be glad you own in twenty years.

GitHub

Victor Zhou

Founder & Standards Editor • Namefi
Editor

Victor Zhou is a technology founder and standards editor focused on digital identity and trust. He founded Namefi, edits Ethereum Improvement Proposals, and previously led smart-contract architecture work at Google Labs.

His work sits at the intersection of naming, ownership, and the systems people use to establish identity online. That perspective makes him especially interested in the way names move between personal meaning, public recognition, and digital infrastructure.

For Namefi, Victor edits and writes about domains as durable digital identity: how names become ownable onchain assets, how tokenization changes custody and trust, and what naming can learn from the systems people use to establish identity online.

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