@exromany/lido-csm-sdk/dist/esm/deposit-data-sdk/cached-keys/cached-keys.js

[](https://github.com/lidofinance/lido-csm-sdk/blob/main/LICENSE.txt) [](h

import { getFromLocalStorage, saveToLocalStorage, } from '../local-storage/index.js';
const KEY_TTL_IN_BLOCKS = 93_000; // ~ 2 weeks: 60 * 60 * 24 * 7 * 2 / 13
const getStorageKey = (chainId) => `lido-csm-keys-${chainId}`;
const setKeys = (chainId, keys) => saveToLocalStorage(getStorageKey(chainId), keys);
const getKeys = (chainId) => getFromLocalStorage(getStorageKey(chainId)) || {};
const getIsKeyToKeep = (keyBlock, currentBlock) => {
    if (!keyBlock || !currentBlock)
        return true;
    const age = Math.max(currentBlock - keyBlock, 0);
    const isOld = age >= KEY_TTL_IN_BLOCKS;
    return !isOld;
};
const cleanKeys = (keys, blockNumber) => {
    return Object.entries(keys).reduce((updatedKeys, [pubKey, keyBlockNumber]) => {
        const keepKey = getIsKeyToKeep(keyBlockNumber, blockNumber);
        if (keepKey) {
            updatedKeys[pubKey] = keyBlockNumber;
        }
        return updatedKeys;
    }, {});
};
export const saveKeys = (pubKeys, chainId, blockNumber) => {
    const storedKeys = getKeys(chainId);
    const updatedKeys = pubKeys.reduce((mergedKeys, pubKey) => {
        mergedKeys[pubKey] = blockNumber;
        return mergedKeys;
    }, cleanKeys(storedKeys, blockNumber));
    setKeys(chainId, updatedKeys);
};
export const removeKeys = (pubKeys, chainId, blockNumber) => {
    const storedKeys = getKeys(chainId);
    const updatedKeys = pubKeys.reduce((mergedKeys, pubKey) => {
        delete mergedKeys[pubKey];
        return mergedKeys;
    }, cleanKeys(storedKeys, blockNumber));
    setKeys(chainId, updatedKeys);
};
export const checkKeys = (pubKeys, chainId, blockNumber) => {
    const storedKeys = getKeys(chainId);
    return pubKeys.filter((pubKey) => {
        const keyBlockNumber = storedKeys[pubKey];
        return keyBlockNumber ? getIsKeyToKeep(keyBlockNumber, blockNumber) : false;
    });
};
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