first commit

wangzhibo

2026-05-09 53418655c061ac26f66058253f39200aced1ab1d

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/*
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
 
import { InteractionType } from "./BrowserConstants.js";
import {
    ICrypto,
    RequestStateObject,
    ProtocolUtils,
    createClientAuthError,
    ClientAuthErrorCodes,
} from "@azure/msal-common/browser";
 
export type BrowserStateObject = {
    interactionType: InteractionType;
};
 
/**
 * Extracts the BrowserStateObject from the state string.
 * @param browserCrypto
 * @param state
 */
export function extractBrowserRequestState(
    browserCrypto: ICrypto,
    state: string
): BrowserStateObject | null {
    if (!state) {
        return null;
    }
 
    try {
        const requestStateObj: RequestStateObject =
            ProtocolUtils.parseRequestState(browserCrypto.base64Decode, state);
        return requestStateObj.libraryState.meta as BrowserStateObject;
    } catch (e) {
        throw createClientAuthError(ClientAuthErrorCodes.invalidState);
    }
}