int

The CandidType object int corresponds to the Candid type int, is inferred to be a TypeScript bigint, and will be decoded into a JavaScript BigInt at runtime.

TypeScript or JavaScript:

import { Canister, int, query } from 'azle';

export default Canister({
    getInt: query([], int, () => {
        return 170_141_183_460_469_231_731_687_303_715_884_105_727n;
    }),
    printInt: query([int], int, (int) => {
        console.log(typeof int);
        return int;
    })
});

Candid:

service : () -> {
    getInt : () -> (int) query;
    printInt : (int) -> (int) query;
}

dfx:

dfx canister call candid_canister printInt '(170_141_183_460_469_231_731_687_303_715_884_105_727 : int)'
(170_141_183_460_469_231_731_687_303_715_884_105_727 : int)