rxdb
Version:
A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/
32 lines (30 loc) • 1.31 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.isMasterInWebRTCReplication = isMasterInWebRTCReplication;
exports.sendMessageAndAwaitAnswer = sendMessageAndAwaitAnswer;
var _rxjs = require("rxjs");
/**
* To deterministically define which peer is master and
* which peer is fork, we compare the storage tokens.
* But we have to hash them before, to ensure that
* a storageToken like 'aaaaaa' is not always the master
* for all peers.
*/
async function isMasterInWebRTCReplication(hashFunction, ownStorageToken, otherStorageToken) {
var isMaster = (await hashFunction([ownStorageToken, otherStorageToken].join('|'))) > (await hashFunction([otherStorageToken, ownStorageToken].join('|')));
return isMaster;
}
/**
* Send a message to the peer and await the answer.
* @throws with an EmptyErrorImpl if the peer connection
* was closed before an answer was received.
*/
function sendMessageAndAwaitAnswer(handler, peer, message) {
var requestId = message.id;
var answerPromise = (0, _rxjs.firstValueFrom)(handler.response$.pipe((0, _rxjs.filter)(d => d.peer === peer), (0, _rxjs.filter)(d => d.response.id === requestId), (0, _rxjs.map)(d => d.response)));
handler.send(peer, message);
return answerPromise;
}
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