@trezor/connect-common/lib/storage.js

Collection of assets and utils used by trezor-connect library.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.storage = void 0;
const utils_1 = require("@trezor/utils");
const storageVersion = 2;
const storageName = `storage_v${storageVersion}`;
const getEmptyState = () => ({
  origin: {}
});
let memoryStorage = getEmptyState();
const getPermanentStorage = () => {
  const ls = localStorage.getItem(storageName);
  return ls ? JSON.parse(ls) : getEmptyState();
};
class Storage extends utils_1.TypedEmitter {
  save(getNewState, temporary = false) {
    if (temporary || !global.window) {
      memoryStorage = getNewState(memoryStorage);
      return;
    }
    try {
      const newState = getNewState(getPermanentStorage());
      localStorage.setItem(storageName, JSON.stringify(newState));
      this.emit('changed', newState);
    } catch {
      console.warn('long term storage not available');
      memoryStorage = getNewState(memoryStorage);
    }
  }
  saveForOrigin(getNewState, origin, temporary = false) {
    this.save(state => ({
      ...state,
      origin: {
        ...state.origin,
        [origin]: getNewState(state.origin?.[origin] || {})
      }
    }), temporary);
  }
  load(temporary = false) {
    if (temporary || !global?.window?.localStorage) {
      return memoryStorage;
    }
    try {
      return getPermanentStorage();
    } catch {
      console.warn('long term storage not available');
      return memoryStorage;
    }
  }
  loadForOrigin(origin, temporary = false) {
    const state = this.load(temporary);
    return state.origin?.[origin] || {};
  }
}
const storage = new Storage();
exports.storage = storage;
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