feat: add payment module and factory

src/modules/payments/gateways/zarinpal.gateway.ts

@@ -0,0 +1,96 @@
+import { HttpService } from "@nestjs/axios";
+import { Inject, Injectable, InternalServerErrorException, Logger } from "@nestjs/common";
+import { AxiosError } from "axios";
+import { catchError, firstValueFrom } from "rxjs";
+
+import { PaymentMessage } from "../../../common/enums/message.enum";
+import { IZarinpalConfig } from "../../../configs/zarinpal.config";
+import { ZARINPAL_CONFIG } from "../constants";
+import { GatewayEnum } from "../enums/gateway.enum";
+import {
+  IPaymentGateway,
+  IPaymentVerifyParams,
+  IProcessPaymentParams,
+  ZarinPalPGNewArgs,
+  ZarinPalPGNewRequestData,
+  ZarinPalPGVerifyData,
+} from "../interfaces/IPayment";
+
+@Injectable()
+export class ZarinpalGateway implements IPaymentGateway {
+  private readonly logger = new Logger(ZarinpalGateway.name);
+  private readonly gatewayApiUrl: string;
+  private readonly requestHeader: Record<string, string> = { "Content-Type": "application/json", Accept: "application/json" };
+
+  constructor(
+    @Inject(ZARINPAL_CONFIG) private readonly config: IZarinpalConfig,
+    private readonly httpService: HttpService,
+  ) {
+    this.gatewayApiUrl = `https://${this.config.ipgType}.${this.config.gatewayApiUrl}`;
+  }
+  //*************************************** */
+  async processPayment(processParams: IProcessPaymentParams) {
+    try {
+      const purchaseData: ZarinPalPGNewArgs = {
+        merchant_id: this.config.merchantId,
+        amount: processParams.amount,
+        callback_url: `${this.config.callBackUrl}/${GatewayEnum.ZARINPAL}`,
+        description: processParams.description,
+        currency: "IRT",
+        metadata: { email: processParams.email, mobile: processParams.mobile },
+      };
+
+      const { data } = await firstValueFrom(
+        this.httpService
+          .post<ZarinPalPGNewRequestData>(`${this.gatewayApiUrl}/v4/payment/request.json`, purchaseData, {
+            headers: this.requestHeader,
+          })
+          .pipe(
+            catchError((err: AxiosError) => {
+              this.logger.error(err);
+              throw new InternalServerErrorException(PaymentMessage.ERROR_IN_PROCESS_PAYMENT);
+            }),
+          ),
+      );
+
+      return {
+        redirectUrl: `${this.gatewayApiUrl}/StartPay/${data.data.authority}`,
+        message: data.data.message,
+        reference: data.data.authority,
+      };
+    } catch (error) {
+      this.logger.error(error);
+      throw new InternalServerErrorException(PaymentMessage.ERROR_IN_PROCESS_PAYMENT);
+    }
+  }
+  //********************************** */
+  async verifyPayment(verifyParams: IPaymentVerifyParams) {
+    try {
+      const verifyData = { authority: verifyParams.reference, amount: verifyParams.amount, merchant_id: this.config.merchantId };
+
+      const { data } = await firstValueFrom(
+        this.httpService
+          .post<ZarinPalPGVerifyData>(`${this.config.gatewayApiUrl}/v4/payment/verify.json`, verifyData, { headers: this.requestHeader })
+          .pipe(
+            catchError((err: AxiosError) => {
+              this.logger.error(err);
+              throw new InternalServerErrorException(PaymentMessage.ERROR_IN_VERIFY_PAYMENT);
+            }),
+          ),
+      );
+
+      return {
+        code: data.data.code,
+        message: data.data.message,
+        card_hash: data.data.card_hash,
+        card_pan: data.data.card_pan,
+        ref_id: data.data.ref_id,
+        fee_type: data.data.fee_type,
+        fee: data.data.fee,
+      };
+    } catch (error) {
+      this.logger.error(error);
+      throw new InternalServerErrorException(PaymentMessage.ERROR_IN_VERIFY_PAYMENT);
+    }
+  }
+}