initial commit: @arbiter/core authorization engine with js-rigor hardening
Zanzibar-style authorization graph engine (direct/chain/TTU/defeasible/ binary modes, condensed snapshots, value relations) with 39 rigor test campaigns. Includes fixes for snapshot binary writer/reader format mismatch (snapshot-of-snapshot corruption), possibility write-boundary validation, empty-graph snapshot serialization, relation lookup cache direction collision, config-redefinition cache invalidation, binary threshold semantics, defeasible compiled routing, and comparator reason whitelisting.
This commit is contained in:
John Dvorak
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import { describe, test } from 'node:test';
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import assert from 'node:assert/strict';
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import fs from 'node:fs';
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import os from 'node:os';
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import path from 'node:path';
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import { CondensedGraph } from '../../src/core/CondensedGraph.js';
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import { ShardedSnapshotBuilder } from '../../src/core/shards/ShardedSnapshotBuilder.js';
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import { ShardedSnapshot } from '../../src/core/shards/ShardedSnapshot.js';
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import { FileShardStorage } from '../../src/core/shards/FileShardStorage.js';
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import { DeltaShardBinary } from '../../src/core/shards/DeltaShardBinary.js';
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import { WaveletShardBinary } from '../../src/core/shards/WaveletShardBinary.js';
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function buildSnapshot(bucketSize = 4) {
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const graph = new CondensedGraph();
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const nodes = [];
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for (let i = 0; i < 6; i++) {
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nodes.push(graph._ensureNode(`node:${i}`));
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}
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graph.addEdge(nodes[0], 'risk_score', nodes[1], 1.0, { value: 0.4 });
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graph.addEdge(nodes[0], 'risk_score', nodes[2], 1.0, { value: 0.9 });
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graph.addEdge(nodes[3], 'risk_score', nodes[4], 1.0, { value: 0.5 });
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graph.addEdge(nodes[1], 'risk_limit', nodes[1], 1.0, { value: 0.6 });
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graph.addEdge(nodes[2], 'risk_limit', nodes[2], 1.0, { value: 0.6 });
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graph.addEdge(nodes[4], 'risk_limit', nodes[4], 1.0, { value: 0.6 });
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graph.finalizePerfectHash();
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graph.finalizeWaveletAdjacency({ dropAdjacencyList: true });
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const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'sharded-delta-comp-'));
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const builder = new ShardedSnapshotBuilder({ bucketSize, includeDirections: ['out', 'in'] });
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const manifest = builder.build(graph, dir);
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const storage = new FileShardStorage(dir);
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const snapshot = new ShardedSnapshot(manifest, storage, { cacheLimit: 8 });
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snapshot.initializeSync();
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return { snapshot, manifest, dir, nodes };
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}
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function writeDeltaLayer(snapshot, dir, entries, mode = 'override') {
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fs.mkdirSync(dir, { recursive: true });
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const merged = new Map();
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for (const entry of entries) {
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const shardMeta = snapshot._selectShardMeta(entry.relationId, entry.direction, entry.srcId);
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assert.ok(shardMeta, 'Missing shard meta for delta entry');
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const localSource = snapshot._localSource(entry.srcId, shardMeta);
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const key = shardMeta.cacheKey;
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let bucket = merged.get(key);
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if (!bucket) {
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bucket = { shardMeta, additions: [], removals: [] };
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merged.set(key, bucket);
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}
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for (const add of entry.additions) {
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bucket.additions.push({
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srcLocal: localSource,
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otherId: add.dstId,
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possBits: add.possBits,
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relBits: add.relBits
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});
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}
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for (const rem of entry.removals) {
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bucket.removals.push({
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srcLocal: localSource,
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otherId: rem.dstId
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});
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}
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}
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const shards = [];
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for (const bucket of merged.values()) {
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const shardMeta = bucket.shardMeta;
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const buffer = DeltaShardBinary.serialize({
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relationId: shardMeta.relationId,
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direction: shardMeta.direction,
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rangeStart: shardMeta.rangeStart,
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rangeEnd: shardMeta.rangeEnd,
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nodeCount: snapshot.nodeCount,
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additions: bucket.additions,
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removals: bucket.removals
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});
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const shardKey = `delta-${shardMeta.key}`;
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fs.writeFileSync(path.join(dir, shardKey), new Uint8Array(buffer));
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shards.push({
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key: shardKey,
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relationId: shardMeta.relationId,
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direction: shardMeta.direction,
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rangeStart: shardMeta.rangeStart,
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rangeEnd: shardMeta.rangeEnd,
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cacheKey: shardMeta.cacheKey
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});
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}
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return { shards, storage: new FileShardStorage(dir), mode };
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}
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function compactLayer(snapshot, layer, manifest, outputDir, baseDir) {
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fs.rmSync(outputDir, { recursive: true, force: true });
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fs.mkdirSync(outputDir, { recursive: true });
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if (manifest.nodeTableKey) {
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fs.copyFileSync(path.join(baseDir, manifest.nodeTableKey), path.join(outputDir, manifest.nodeTableKey));
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}
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if (manifest.componentKey) {
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fs.copyFileSync(path.join(baseDir, manifest.componentKey), path.join(outputDir, manifest.componentKey));
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}
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for (const shard of manifest.shards || []) {
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const basePath = path.join(baseDir, shard.key);
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fs.copyFileSync(basePath, path.join(outputDir, shard.key));
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}
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for (const shardMeta of layer.shards) {
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const base = snapshot._cacheIndex.get(shardMeta.cacheKey);
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if (!base) continue;
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const shard = snapshot._loadShardSync(base.relationId, base.direction, base.rangeStart);
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if (!shard) continue;
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const deltaBuffer = layer.storage.getSync(shardMeta.key);
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if (!deltaBuffer) continue;
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const deltaShard = DeltaShardBinary.deserialize(deltaBuffer);
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const rangeSize = shard.rangeEnd - shard.rangeStart;
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const sources = new Array(rangeSize);
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for (let localSource = 0; localSource < rangeSize; localSource++) {
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const range = snapshot._rangeForSource(shard, localSource);
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const list = [];
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if (range) {
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for (let pos = range.start; pos < range.end; pos++) {
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list.push({ otherId: shard.dstIds[pos], possBits: shard.possBits[pos], relBits: shard.relBits[pos] });
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}
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}
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sources[localSource] = list;
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}
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for (const removal of deltaShard.removals) {
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const list = sources[removal.srcLocal];
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if (!list) continue;
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const idx = list.findIndex((item) => item.otherId === removal.otherId);
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if (idx !== -1) list.splice(idx, 1);
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}
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for (const addition of deltaShard.additions) {
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const list = sources[addition.srcLocal] || (sources[addition.srcLocal] = []);
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list.push({ otherId: addition.otherId, possBits: addition.possBits, relBits: addition.relBits });
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}
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const buffer = WaveletShardBinary.serialize({
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relationId: shard.relationId,
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direction: shard.direction,
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rangeStart: shard.rangeStart,
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rangeEnd: shard.rangeEnd,
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nodeCount: snapshot.nodeCount,
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sources
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});
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fs.writeFileSync(path.join(outputDir, base.key), new Uint8Array(buffer));
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}
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}
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function evaluateRisk(snapshot, relScore, relLimit, userId, docId) {
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const scoreEdge = snapshot.findEdgeSync(userId, relScore, docId);
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if (!scoreEdge || scoreEdge.value === undefined) return false;
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const limitEdge = snapshot.findEdgeSync(docId, relLimit, docId);
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if (!limitEdge || limitEdge.value === undefined) return false;
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return scoreEdge.value <= limitEdge.value;
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}
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// ADR-003: sharded snapshots are stubs in src/core/shards/ — tests are the spec for when the subsystem is implemented.
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describe.skip('Sharded delta comparator equivalence', () => {
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test('overlay and compacted base agree on comparator outcomes', () => {
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const { snapshot, manifest, dir, nodes } = buildSnapshot(4);
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const relIdScore = snapshot.relationIdToName.indexOf('risk_score');
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const relIdLimit = snapshot.relationIdToName.indexOf('risk_limit');
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const deltaDir = path.join(dir, 'delta');
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const layer = writeDeltaLayer(snapshot, deltaDir, [
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{ relationId: relIdScore, direction: 'out', srcId: nodes[0], additions: [{ dstId: nodes[3], possBits: 65535, relBits: 65535 }], removals: [] },
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{ relationId: relIdLimit, direction: 'out', srcId: nodes[3], additions: [{ dstId: nodes[3], possBits: 65535, relBits: 65535 }], removals: [] }
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], 'override');
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snapshot.setDeltaLayers([layer]);
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const compactDir = path.join(dir, 'compact');
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compactLayer(snapshot, layer, manifest, compactDir, dir);
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const compactSnapshot = new ShardedSnapshot(manifest, new FileShardStorage(compactDir), { cacheLimit: 8 });
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compactSnapshot.initializeSync();
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const overlayResult = evaluateRisk(snapshot, relIdScore, relIdLimit, nodes[0], nodes[3]);
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const compactResult = evaluateRisk(compactSnapshot, relIdScore, relIdLimit, nodes[0], nodes[3]);
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assert.strictEqual(overlayResult, compactResult);
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fs.rmSync(dir, { recursive: true, force: true });
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});
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});
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