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sim/local-api.js

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  1. // LEASH wallet-control — offline implementation of the challenge API.
  2. // Mirrors the hosted platform's contract (bootstrap, mandates, scenario-runs,
  3. // long-poll decision-requests, decision, resolve, reset) backed by the data pack,
  4. // so the full app — UI + worker + engine — runs end-to-end without a team key.
  5. import crypto from 'node:crypto';
  6. import { PackData } from './events.js';
  8. const rid = (p) => `${p}_${crypto.randomBytes(6).toString('hex')}`;
  10. export class LocalApi {
  11. constructor(packDir, store) {
  12. this.pack = new PackData(packDir);
  13. this.store = store;
  14. this.runs = new Map(); // run_id -> {queue, cursor, mandate, awaiting: null|{resolver}}
  15. this.decisions = new Map(); // live authorization_id -> accepted decision
  16. this.stepUps = new Map(); // live authorization_id -> true
  17. this.events = []; // feed
  18. this.drafts = new Map();
  19. // Restore the simulator's accepted decisions and pending human requests from
  20. // the same ledger the worker persists. Restart must not erase the inbox.
  21. for (const m of store.mandates.values()) {
  22. if (m.draft_id) this.drafts.set(m.draft_id, m);
  23. }
  24. for (const run of store.runs.values()) {
  25. const queue = this.pack.byScenario.get(run.scenario_id);
  26. if (!queue) continue;
  27. const mandate = run.mandateSnapshot;
  28. if (!mandate) continue;
  29. let cursor = 0;
  30. for (const row of queue) {
  31. const id = this.liveIdFor(run.run_id, row.authorization_id);
  32. const decision = run.decisions.get(id);
  33. if (!decision?.submitted) break;
  34. cursor++;
  35. this.decisions.set(id, { decision: decision.finalDecision === 'approved' ? 'approve' : decision.finalDecision === 'declined' ? 'decline' : decision.decision });
  36. if (run.stepUps.has(id) && !decision.finalDecision) this.stepUps.set(id, true);
  37. }
  38. this.runs.set(run.run_id, { queue, cursor, mandate, scenario_id: run.scenario_id });
  39. }
  41. }
  43. bootstrap() {
  44. return {
  45. api_version: 'sim-1.0.0',
  46. pack_version: 'saw26 (offline simulator)',
  47. scenarios: this.pack.scenarios.map(s => ({ scenario_id: s.scenario_id, name: s.scenario_name, event_count: Number(s.event_count) })),
  48. timeouts: { decision_seconds: 8, human_window_seconds: 120 },
  49. features: { offline: true },
  50. };
  51. }
  53. referenceData() {
  54. return { scenarios: this.pack.scenarios, fx_rates: 'see data/pack/fx_rates.csv', history: 'data/pack/authorization_history.csv' };
  55. }
  57. // ---- Mandates --------------------------------------------------------------
  58. createMandate(body) {
  59. const draft_id = rid('md');
  60. const mandate = {
  61. draft_id,
  62. status: 'draft',
  63. instruction: body.instruction,
  64. hard_rules: body.hard_rules || [],
  65. uncertainty_policy: body.uncertainty_policy || 'ask',
  66. guidance: body.guidance || [],
  67. open_questions: body.open_questions || [],
  68. created_at: new Date().toISOString(),
  69. };
  70. this.drafts.set(draft_id, mandate);
  71. return { draft_id, ...mandate };
  72. }
  74. confirmMandate(draftId, { confirmed }) {
  75. const m = this.drafts.get(draftId);
  76. if (!m) throw new HttpError(404, 'draft not found');
  77. if (!confirmed) throw new HttpError(400, 'confirmation must be true');
  78. m.status = 'active';
  79. m.mandate_id = rid('TM_SIM');
  80. m.confirmed_at = new Date().toISOString();
  81. this.store.putMandate(m);
  82. return { mandate_id: m.mandate_id };
  83. }
  85. getMandate(id) {
  86. const m = [...this.drafts.values()].find(x => x.mandate_id === id || x.draft_id === id);
  87. if (!m) throw new HttpError(404, 'mandate not found');
  88. return m;
  89. }
  91. patchMandate(id, patch) {
  92. const m = this.getMandate(id);
  93. if (m.status !== 'active') throw new HttpError(409, 'only active mandates can be patched');
  94. if (patch.hard_rules) {
  95. // tightening only: every existing rule must remain, additions allowed
  96. for (const old of m.hard_rules) {
  97. if (!patch.hard_rules.some(r => JSON.stringify(r) === JSON.stringify(old))) {
  98. throw new HttpError(422, 'existing rules cannot be removed or replaced — tightening only');
  99. }
  100. }
  101. m.hard_rules = patch.hard_rules;
  102. }
  103. if (patch.uncertainty_policy) {
  104. const allowed = (m.uncertainty_policy === 'ask' || m.uncertainty_policy === 'approve') && patch.uncertainty_policy === 'decline';
  105. if (!allowed && patch.uncertainty_policy !== m.uncertainty_policy) {
  106. throw new HttpError(422, `uncertainty_policy ${m.uncertainty_policy} → ${patch.uncertainty_policy} not allowed by platform rules`);
  107. }
  108. m.uncertainty_policy = patch.uncertainty_policy;
  109. }
  110. if (patch.guidance) m.guidance = patch.guidance;
  111. if (patch.open_questions) m.open_questions = patch.open_questions;
  112. this.store.putMandate(m);
  113. return m;
  114. }
  116. revokeMandate(id) {
  117. const m = this.getMandate(id);
  118. m.status = 'revoked';
  119. m.revoked_at = new Date().toISOString();
  120. this.store.putMandate(m);
  121. return { revoked: true, mandate_id: m.mandate_id };
  122. }
  124. // ---- Runs -------------------------------------------------------------------
  125. startRun({ scenario_id, mandate_id }) {
  126. const mandate = this.getMandate(mandate_id);
  127. if (mandate.status !== 'active') throw new HttpError(409, 'mandate must be active to start a run');
  128. const attempts = this.byScenarioChecked(scenario_id);
  129. const run_id = rid('run');
  130. const authority = this.pack.authorities.find(a => a.authority_id === attempts[0]?.authority_id);
  131. const snapshot = JSON.parse(JSON.stringify(mandate));
  132. // bind a customer identity for the run (offline sim assigns like the platform)
  133. snapshot.customer_id = authority ? authority.customer_id : 'CU0001';
  134. this.store.createRun({ run_id, scenario_id, mandate_id, mandateSnapshot: snapshot, totalEvents: attempts.length });
  135. this.runs.set(run_id, { queue: attempts, cursor: 0, mandate: snapshot, scenario_id });
  136. return {
  137. run_id, scenario_id, mandate_id,
  138. fixture_profiles: { authority_id: attempts[0]?.authority_id, customer_id: snapshot.customer_id },
  139. event_counters: { total: attempts.length, delivered: 0, decided: 0 },
  140. };
  141. }
  143. byScenarioChecked(id) {
  144. const list = this.pack.byScenario.get(id);
  145. if (!list || !list.length) throw new HttpError(404, `unknown scenario ${id}`);
  146. return list;
  147. }
  149. /** Long-poll: delivers the next event once the previous one has a recorded decision. */
  150. async nextRequest(runId, waitMs = 25000) {
  151. const R = this.runs.get(runId);
  152. if (!R) throw new HttpError(404, 'run not found');
  153. const t0 = Date.now();
  154. while (Date.now() - t0 < waitMs) {
  155. const prev = R.cursor > 0 ? R.queue[R.cursor - 1] : null;
  156. const prevLive = prev ? this.liveIdFor(runId, prev.authorization_id) : null;
  157. const prevDone = !prev || this.decisions.has(prevLive);
  158. if (prevDone && R.cursor < R.queue.length) {
  159. const row = R.queue[R.cursor];
  160. const run = this.store.getRun(runId);
  161. const event = this.pack.buildEvent(row, {
  162. mandate: R.mandate,
  163. context: this.buildContext(runId, row),
  164. });
  165. // live id differs from source id; keep stable per run+attempt
  166. event.authorization.authorization_id = this.liveIdFor(runId, row.authorization_id);
  167. R.cursor++;
  168. this.events.push({ event_id: rid('ev'), run_id: runId, type: 'authorization.request', authorization_id: event.authorization.authorization_id, occurred_at: new Date().toISOString(), status: 'delivered' });
  169. return { envelope: this.envelope(runId, event) };
  170. }
  171. if (R.cursor >= R.queue.length && prevDone) {
  172. const run = this.store.getRun(runId);
  173. if (run) run.status = [...run.decisions.values()].every(d => d.finalDecision || d.decision !== 'step_up') ? 'completed' : 'awaiting_customers';
  174. return null; // 204
  175. }
  176. await new Promise(r => setTimeout(r, 150));
  177. }
  178. return null; // timed out -> 204
  179. }
  181. liveIdFor(runId, sourceId) {
  182. return `AU_LIVE_${runId.slice(-6)}_${sourceId}`;
  183. }
  185. buildContext(runId, row) {
  186. // platform-style context: approved spend this run (rolling 7d on sim timestamps) + recent list
  187. const run = this.store.getRun(runId);
  188. let spend = 0;
  189. const recent = [];
  190. if (run) {
  191. const now = new Date(row.timestamp).getTime();
  192. for (const s of run.spend) {
  193. if (now - s.simTs <= 7 * 86400_000 && s.simTs <= now) spend += s.amount;
  194. recent.push({ authorization_id: s.authorization_id, decision: 'approved' });
  195. }
  196. }
  197. return { approved_spend_in_period_chf: Math.round(spend * 100) / 100, recent_authorizations: recent.slice(-5) };
  198. }
  200. envelope(runId, event) {
  201. return {
  202. run_id: runId,
  203. event_id: this.events[this.events.length - 1]?.event_id,
  204. type: 'authorization.request',
  205. authorization_id: event.authorization.authorization_id,
  206. status: 'actionable',
  207. occurred_at: new Date().toISOString(),
  208. data: event,
  209. };
  210. }
  212. submitDecision(authorizationId, body) {
  213. if (!this.stepUps.has(authorizationId) && this.decisions.has(authorizationId)) {
  214. return { accepted: true, duplicate: true };
  215. }
  216. if (!['approve', 'decline', 'step_up'].includes(body.decision)) throw new HttpError(422, 'bad decision');
  217. this.decisions.set(authorizationId, { decision: body.decision, at: Date.now() });
  218. if (body.decision === 'step_up') this.stepUps.set(authorizationId, true);
  219. return { accepted: true };
  220. }
  222. resolve(authorizationId, body) {
  223. if (!this.stepUps.has(authorizationId)) throw new HttpError(409, 'no pending step-up for this authorization');
  224. if (!['approve', 'decline'].includes(body.decision)) throw new HttpError(422, 'resolve requires approve|decline');
  225. this.stepUps.delete(authorizationId);
  226. this.decisions.set(authorizationId, { decision: body.decision, resolved: true, at: Date.now() });
  227. return { accepted: true };
  228. }
  230. reset() {
  231. this.runs.clear(); this.decisions.clear(); this.stepUps.clear();
  232. this.events = []; this.drafts.clear();
  233. return { reset: true };
  234. }
  235. }
  237. export class HttpError extends Error {
  238. constructor(status, message) { super(message); this.status = status; }
  239. }