Compact.js

Compact.js provides a TypeScript-based execution environment for smart contracts compiled with the Compact compiler. When a Compact smart contract is compiled, the output includes a JavaScript file and a TypeScript declaration file.

Compact.js uses these files at runtime to execute the circuits. The circuit execution results are then used by higher-level tools and frameworks (such as Midnight.js) to create and submit transactions to the Midnight blockchain.

For more information, see the Compact language documentation.

Version

Status

Release 2.5.0LATEST

20 March 2026

Artifacts

NPM Package

Summary

Adds --input-ledger-params support to the circuit command in @midnight-ntwrk/compact-js-command.
Defaults to initial ledger parameters when --input-ledger-params is not provided.
Built against @midnight-ntwrk/compact-runtime 0.15.0 and requires compact-compiler 0.30.0.
Contracts must be recompiled against the updated dependencies.