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lib/store.js

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  1. // LEASH wallet-control — runtime state: mandates, runs, decisions, step-ups.
  2. // In-memory with JSON persistence for restart-safety. All spend tracking uses
  3. // simulated purchase timestamps; decision deadlines use the real clock.
  5. import fs from 'node:fs';
  6. import { round2 } from './util.js';
  8. export class Store {
  9. constructor(persistPath = null) {
  10. this.persistPath = persistPath;
  11. this.mandates = new Map(); // mandate_id -> {mandate_id, status, instruction, hard_rules, uncertainty_policy, guidance, open_questions, created_at, draft_id}
  12. this.runs = new Map(); // run_id -> RunState
  13. this.trustedDomains = new Map(); // domain -> {addedAt, note} — customer-approved ("yellow-list resolved") merchants
  14. if (this.persistPath) this.#load();
  15. }
  17. #load() {
  18. try {
  19. const raw = JSON.parse(fs.readFileSync(this.persistPath, 'utf8'));
  20. for (const m of raw.mandates || []) this.mandates.set(m.mandate_id || m.draft_id, m);
  21. for (const [d, meta] of raw.trusted_domains || []) this.trustedDomains.set(d, meta);
  22. for (const r of raw.runs || []) {
  23. r.decisions = new Map(r.decisionsSerialized || []);
  24. r.stepUps = new Map(r.stepUpsSerialized || []);
  25. this.runs.set(r.run_id, r);
  26. }
  27. } catch { /* fresh state */ }
  28. }
  30. #persist() {
  31. if (!this.persistPath) return;
  32. const runs = [...this.runs.values()].map(r => ({
  33. ...r,
  34. decisions: undefined, stepUps: undefined,
  35. decisionsSerialized: [...r.decisions.entries()],
  36. stepUpsSerialized: [...(r.stepUps?.entries?.() || [])],
  37. }));
  38. try {
  39. const pendingPath = this.persistPath + '.pending';
  40. fs.writeFileSync(pendingPath, JSON.stringify({ mandates: [...this.mandates.values()], trusted_domains: [...this.trustedDomains.entries()], runs }, null, 1), { mode: 0o600 });
  41. fs.renameSync(pendingPath, this.persistPath);
  42. } catch { /* best-effort */ }
  43. }
  45. // ---- Mandates ------------------------------------------------------------
  46. putMandate(m) {
  47. const id = m.mandate_id || m.draft_id;
  48. if (!id) throw new Error('Mandate or draft ID required');
  49. if (m.mandate_id && m.draft_id) this.mandates.delete(m.draft_id);
  50. this.mandates.set(id, m); this.#persist();
  51. }
  52. getMandate(id) { return this.mandates.get(id) || null; }
  54. // ---- Trusted merchant domains ("whitelist"; filled by customer approval) ----
  55. /** Add a domain to the customer's trusted list. Tolerates URL-shaped input;
  56. * stores the bare registrable host (no scheme, path, or www). Idempotent. */
  57. addTrustedDomain(domain, note) {
  58. let d = String(domain || '').toLowerCase().trim();
  59. if (/^[a-z][a-z0-9+.-]*:\/\//i.test(d) || d.includes('/')) {
  60. try { d = new URL(d.includes('://') ? d : `https://${d}`).hostname; } catch { /* keep raw */ }
  61. }
  62. d = d.replace(/^www\./, '');
  63. if (!d || !d.includes('.')) return null;
  64. const meta = this.trustedDomains.get(d) || { addedAt: Date.now() };
  65. meta.note = note || meta.note || 'customer approved';
  66. this.trustedDomains.set(d, meta);
  67. this.#persist();
  68. return d;
  69. }
  71. /** Exact or subdomain match: trusting example.com covers shop.example.com. */
  72. isTrustedDomain(domain) {
  73. const d = String(domain || '').toLowerCase().trim().replace(/^www\./, '');
  74. if (!d || !d.includes('.')) return null;
  75. if (this.trustedDomains.has(d)) return this.trustedDomains.get(d);
  76. for (const [trusted, meta] of this.trustedDomains) {
  77. if (d.endsWith('.' + trusted)) return meta;
  78. }
  79. return null;
  80. }
  82. // ---- Runs ----------------------------------------------------------------
  83. createRun({ run_id, scenario_id, mandate_id, mandateSnapshot, totalEvents, customerIds }) {
  84. const run = {
  85. run_id, scenario_id, mandate_id,
  86. mandateSnapshot,
  87. totalEvents,
  88. customerIds: customerIds || [],
  89. status: 'running',
  90. decisions: new Map(), // live authorization_id -> record
  91. stepUps: new Map(), // live authorization_id -> {event, decidedAt, deadline, evaluation}
  92. spend: [], // final approvals: {simTs, amount, merchantId, authorization_id}
  93. createdAt: Date.now(),
  94. };
  95. this.runs.set(run_id, run);
  96. this.#persist();
  97. return run;
  98. }
  100. getRun(id) { return this.runs.get(id) || null; }
  102. /** Engine-facing state adapter for a run. */
  103. runState(run) {
  104. return {
  105. approvedSpendInWindow: (days, beforeSimTs) => {
  106. const cutoff = beforeSimTs - days * 86400_000;
  107. let sum = 0;
  108. for (const s of run.spend) if (s.simTs > cutoff && s.simTs <= beforeSimTs) sum += s.amount;
  109. return round2(sum);
  110. },
  111. inRunApprovedMerchant: (merchantId) => run.spend.some(s => s.merchantId === merchantId),
  112. trustedDomainCheck: (domain) => this.isTrustedDomain(domain),
  113. findDuplicate: ({ signature, authId, simTs, merchantId, billing }) => {
  114. for (const [aid, d] of run.decisions) {
  115. if (aid === authId) continue;
  116. const minutesAgo = simTs && d.simTs ? Math.round(Math.abs(simTs - d.simTs) / 60000) : null;
  117. if (minutesAgo == null || minutesAgo > 240) continue;
  118. if (d.signature === signature) {
  119. if (d.finalDecision === 'approved') return { kind: 'approved-similar', billing: d.billing ?? d.amount, minutesAgo };
  120. if (d.finalDecision === 'declined') return { kind: 'declined-similar', billing: d.billing ?? d.amount, minutesAgo };
  121. } else if (d.merchantId && d.merchantId === merchantId && minutesAgo <= 15 && Math.abs(d.amount - billing) <= Math.max(2, billing * 0.3)) {
  122. if (d.finalDecision === 'approved') return { kind: 'split-suspect', billing: d.amount, minutesAgo };
  123. }
  124. }
  125. return null;
  126. },
  127. priorDecisions: () => run.decisions,
  128. };
  129. }
  131. recordDecision(runId, authId, record) {
  132. const run = this.runs.get(runId);
  133. if (!run) return;
  134. run.decisions.set(authId, { ...record, decidedAt: Date.now() });
  135. this.#persist();
  136. }
  138. /** Commit accepted decisions, spend and human-review state together, once. */
  139. acceptDecision(runId, authId, record, event, evaluation, deadline) {
  140. const run = this.runs.get(runId);
  141. if (!run) throw new Error('Unknown run');
  142. if (run.decisions.get(authId)?.submitted) return false;
  143. const finalDecision = record.decision === 'step_up' ? null
  144. : record.decision === 'approve' ? 'approved' : 'declined';
  145. run.decisions.set(authId, { ...record, submitted: true, finalDecision, decidedAt: Date.now() });
  146. if (record.decision === 'step_up') {
  147. run.stepUps.set(authId, { event, evaluation, deadline, openedAt: Date.now() });
  148. } else if (finalDecision === 'approved' && !run.spend.some(s => s.authorization_id === authId)) {
  149. run.spend.push({ simTs: record.simTs, amount: record.amount, merchantId: record.merchantId, authorization_id: authId });
  150. }
  151. this.#persist();
  152. return true;
  153. }
  155. getDecision(runId, authId) {
  156. return this.runs.get(runId)?.decisions.get(authId) || null;
  157. }
  159. /** Final human resolution of a step-up. Counts toward spend when approved. */
  160. recordStepUpResolution(runId, authId, finalDecision, customerMessage) {
  161. const run = this.runs.get(runId);
  162. if (!run) return null;
  163. const pending = run.stepUps.get(authId);
  164. if (!pending) return null;
  165. run.stepUps.delete(authId);
  166. const d = run.decisions.get(authId);
  167. if (d) {
  168. d.finalDecision = finalDecision;
  169. d.resolvedAt = Date.now();
  170. d.customerMessage = customerMessage;
  171. }
  172. if (finalDecision === 'approved') {
  173. const a = pending.event.authorization;
  174. run.spend.push({
  175. simTs: new Date(a.timestamp).getTime(),
  176. amount: round2(a.billing_amount_chf),
  177. merchantId: a.merchant?.merchant_id,
  178. authorization_id: authId,
  179. });
  180. }
  181. if (!run.stepUps.size && run.decisions.size >= run.totalEvents) run.status = 'completed';
  182. this.#persist();
  183. return { run, pending, decision: d };
  184. }
  186. addStepUp(runId, authId, event, evaluation, deadline) {
  187. const run = this.runs.get(runId);
  188. if (!run) return;
  189. run.stepUps.set(authId, { event, evaluation, deadline, openedAt: Date.now() });
  190. this.#persist();
  191. }
  193. pendingStepUps(runId) {
  194. const run = this.runs.get(runId);
  195. return run ? [...run.decisions.entries()].filter(([, d]) => d.decision === 'step_up' && !d.finalDecision && run.stepUps.has(d.authorizationId)) : [];
  196. }
  197. }