feat: ( payment ) create payment microservice

2026-08-27 21:20:57 +00:00 · 2026-06-11 15:25:24 +03:00
parent 3235567b41
commit 2b430f8e76
54 changed files with 2809 additions and 0 deletions
--- a/apps/edr-payment-api/src/modules/webhooks/webhook-processor.service.ts
+++ b/apps/edr-payment-api/src/modules/webhooks/webhook-processor.service.ts
@@ -0,0 +1,112 @@
+import { Injectable, Logger } from "@nestjs/common";
+import {
+  MERCHANT_ORDER_PREFIX,
+  PaymentService,
+  ProviderMethod,
+} from "@edr/types";
+import { IntentsRepository } from "../intents/intents.repository";
+import {
+  IntentsService,
+  ProviderResultInput,
+} from "../intents/intents.service";
+import { WebhookEventsRepository } from "./webhook-events.repository";
+
+/** A provider webhook reduced to the fields the shared pipeline needs. */
+export interface NormalizedWebhook {
+  provider: ProviderMethod;
+  /** Provider event id (or a deterministic derivation) — the dedupe key. */
+  externalEventId: string;
+  merchantOrderId: string;
+  providerTxnId?: string;
+  signatureValid: boolean;
+  /** Raw provider status string, stored for audit. */
+  rawStatus: string;
+  payload: Record<string, unknown>;
+  /** Mapped outcome to feed the intent state machine. */
+  result: ProviderResultInput;
+}
+
+/**
+ * The shared webhook pipeline every provider handler funnels into:
+ * persist+dedupe → signature gate → intent lookup → prefix/service cross-check →
+ * state machine → mark processed. Always returns (never throws) so controllers can
+ * ack 200 fast — providers like Waafi time out at 5s and do not retry.
+ */
+@Injectable()
+export class WebhookProcessorService {
+  private readonly logger = new Logger(WebhookProcessorService.name);
+
+  constructor(
+    private readonly webhookEvents: WebhookEventsRepository,
+    private readonly intentsRepository: IntentsRepository,
+    private readonly intentsService: IntentsService,
+  ) {}
+
+  async process(webhook: NormalizedWebhook): Promise<void> {
+    const { provider, merchantOrderId } = webhook;
+
+    const eventRow = await this.webhookEvents.createDeduped({
+      provider,
+      externalEventId: webhook.externalEventId,
+      merchantOrderId,
+      providerTxnId: webhook.providerTxnId ?? null,
+      signatureValid: webhook.signatureValid,
+      status: webhook.rawStatus,
+      payload: webhook.payload,
+    });
+    if (!eventRow) {
+      this.logger.log(
+        `${provider} webhook duplicate: ${webhook.externalEventId} — short-circuit OK`,
+      );
+      return;
+    }
+
+    if (!webhook.signatureValid) {
+      this.logger.warn(
+        `${provider} webhook signature invalid/stale for ref=${merchantOrderId}`,
+      );
+      await this.webhookEvents.markProcessed(eventRow.id, "signature-invalid");
+      return;
+    }
+
+    const intent =
+      await this.intentsRepository.findByMerchantOrderId(merchantOrderId);
+    if (!intent) {
+      // Tolerated: webhook may have raced the intent commit, or the reference is foreign.
+      // The provider gets a 200; retry/poll/reconciliation converges later.
+      this.logger.warn(
+        `${provider} webhook: no PaymentIntent for ref=${merchantOrderId}`,
+      );
+      await this.webhookEvents.markProcessed(eventRow.id, "intent-not-found");
+      return;
+    }
+
+    // Integrity guard (§10): the stateless prefix and the stored discriminator must agree.
+    const expectedPrefix =
+      MERCHANT_ORDER_PREFIX[intent.service as PaymentService];
+    if (expectedPrefix && !merchantOrderId.startsWith(expectedPrefix)) {
+      this.logger.error(
+        `${provider} webhook: merchantOrderId ${merchantOrderId} prefix does not match stored service ${intent.service} — refusing to process`,
+      );
+      await this.webhookEvents.markProcessed(
+        eventRow.id,
+        "service-prefix-mismatch",
+      );
+      return;
+    }
+
+    try {
+      await this.intentsService.applyProviderResult(intent.id, webhook.result);
+      await this.webhookEvents.markProcessed(eventRow.id);
+    } catch (err) {
+      const message = err instanceof Error ? err.message : String(err);
+      this.logger.error(
+        `${provider} webhook processing failed for ${merchantOrderId}: ${message}`,
+      );
+      await this.webhookEvents.markProcessed(
+        eventRow.id,
+        `processing-error: ${message}`,
+      );
+    }
+  }
+}