@stacks/auth/dist/esm/protocolEchoDetection.js

Authentication for Stacks apps.

const GLOBAL_DETECTION_CACHE_KEY = '_blockstackDidCheckEchoReply';
const ECHO_REPLY_PARAM = 'echoReply';
const AUTH_CONTINUATION_PARAM = 'authContinuation';
function getQueryStringParams(query) {
    if (!query) {
        return {};
    }
    const trimmed = /^[?#]/.test(query) ? query.slice(1) : query;
    return trimmed.split('&').reduce((params, param) => {
        const [key, value] = param.split('=');
        params[key] = value ? decodeURIComponent(value.replace(/\+/g, ' ')) : '';
        return params;
    }, {});
}
export function protocolEchoReplyDetection() {
    let globalScope;
    if (typeof self !== 'undefined') {
        globalScope = self;
    }
    else if (typeof window !== 'undefined') {
        globalScope = window;
    }
    else {
        return false;
    }
    if (!globalScope.location || !globalScope.localStorage) {
        return false;
    }
    const existingDetection = globalScope[GLOBAL_DETECTION_CACHE_KEY];
    if (typeof existingDetection === 'boolean') {
        return existingDetection;
    }
    const searchParams = getQueryStringParams(globalScope.location.search);
    const echoReplyParam = searchParams[ECHO_REPLY_PARAM];
    if (echoReplyParam) {
        globalScope[GLOBAL_DETECTION_CACHE_KEY] = true;
        const echoReplyKey = `echo-reply-${echoReplyParam}`;
        globalScope.localStorage.setItem(echoReplyKey, 'success');
        globalScope.setTimeout(() => {
            const authContinuationParam = searchParams[AUTH_CONTINUATION_PARAM];
            globalScope.location.href = authContinuationParam;
        }, 10);
        return true;
    }
    return false;
}
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