verae-archive-aggregator/src/aggregate.js

66 lines
1.8 KiB
JavaScript

/**
* Fan-out archive query and merge replies until timeout.
* @module aggregate
*/
/**
* @param {object} opts
* @param {string} opts.sha256
* @param {string} opts.tenantId
* @param {string[]} [opts.kinds]
* @param {Array<{ archiveId: string, query: (sha: string) => object[]|null }>} opts.archives
* @param {number} [opts.timeoutMs=50] unused in in-process mock (archives are sync)
* @returns {{ archivesQueried: boolean, archiveReplies: number, records: object[], silent: string[] }}
*/
export function aggregateAttached({ sha256, tenantId, kinds = ['publicMeta', 'privateMeta', 'file'], archives }) {
const records = [];
const silent = [];
for (const arch of archives) {
const hit = arch.query(sha256);
if (hit == null) {
silent.push(arch.archiveId);
continue;
}
for (const rec of hit) {
if (!kinds.length || kinds.includes(rec.kind)) records.push(rec);
}
}
return {
sha256,
tenantId,
archivesQueried: true,
archiveReplies: archives.length - silent.length,
silent,
records,
};
}
/**
* Merge chain receipts with archive records.
* @param {object[]} chainReceipts
* @param {object[]} archiveRecords
*/
export function mergeReceipts(chainReceipts, archiveRecords) {
const extra = archiveRecords.map((r) => {
if (r.kind === 'tree') {
return {
kind: 'tree-leaf',
archiveId: r.archiveId,
attachedAt: r.storedAt,
itemizedOnMainChain: false,
merkleRoot: r.record?.merkleRoot,
proof: r.record?.proof,
leafIndex: r.record?.leafIndex,
chainSealJobId: r.record?.chainSealJobId,
...r.record,
};
}
return {
kind: r.kind === 'file' ? 'file-attach' : 'metadata-attach',
archiveId: r.archiveId,
attachedAt: r.storedAt,
...r.record,
};
});
return [...chainReceipts, ...extra];
}