Oracles

note

This is an experimental feature that is not fully documented. If you notice any outdated information or potential improvements to this page, pull request contributions are very welcome: https://github.com/noir-lang/noir

Noir has support for Oracles via RPC calls. This means Noir will make an RPC call and use the return value for proof generation.

Since Oracles are not resolved by Noir, they are unconstrained functions

You can declare an Oracle through the #[oracle(<name>)] flag. Example:

#[oracle(get_number_sequence)]
unconstrained fn get_number_sequence(_size: Field) -> [Field] {}

The timeout for when using an external RPC oracle resolver can be set with the NARGO_FOREIGN_CALL_TIMEOUT environment variable. This timeout is in units of milliseconds.