stable structures

This section is a work in progress.

Examples:

• audio_recorder
• ethereum_json_rpc
• func_types
• http_counter
• inline_types
• persistent-storage
• pre_and_post_upgrade
• stable_structures

import {
    bool,
    Canister,
    nat64,
    nat8,
    Opt,
    query,
    StableBTreeMap,
    text,
    Tuple,
    update,
    Vec
} from 'azle/experimental';

const Key = nat8;
type Key = typeof Key.tsType;

const Value = text;
type Value = typeof Value.tsType;

let map = StableBTreeMap<Key, Value>(0);

export default Canister({
    containsKey: query([Key], bool, (key) => {
        return map.containsKey(key);
    }),

    get: query([Key], Opt(Value), (key) => {
        return map.get(key);
    }),

    insert: update([Key, Value], Opt(Value), (key, value) => {
        return map.insert(key, value);
    }),

    isEmpty: query([], bool, () => {
        return map.isEmpty();
    }),

    items: query([], Vec(Tuple(Key, Value)), () => {
        return map.items();
    }),

    keys: query([], Vec(Key), () => {
        return Uint8Array.from(map.keys());
    }),

    len: query([], nat64, () => {
        return map.len();
    }),

    remove: update([Key], Opt(Value), (key) => {
        return map.remove(key);
    }),

    values: query([], Vec(Value), () => {
        return map.values();
    })
});