beckn-lightweight/handlers/createForwardingHandler.js

Lightweight Node.js utilities to integrate Beckn protocol into existing BPPs

const axios = require("axios");
const { sendAck } = require("../utils/ackResponse");
const { postCallback } = require("../utils/postCallback");

function createForwardingHandlerFactory(config = {}) {
  return function createForwardingHandler({ messageKey, callbackAction }) {
    return async (req, res) => {
      const context = req.body.context;
      const payload = req.body.message?.[messageKey];

      console.log(`[${context.action}] → Received. Sending ACK.`);
      sendAck(res);

      try {
        const bppUri = config.bppUri || context.bpp_uri;
        if (!bppUri) throw new Error("Missing bpp_uri in config or context");

        const forwardUrl = `${bppUri}/${context.action}`;
        const response = await axios.post(forwardUrl, req.body, {
          headers: { "Content-Type": "application/json" },
        });

        console.log(`[${context.action}] → Forwarded to BPP. Posting callback.`);

        const bapUri = config.bapUri || context.bap_uri;
        await postCallback(callbackAction, context, response.data, bapUri);
      } catch (err) {
        console.error(`${callbackAction} forwarding error:`, err.message);
      }
    };
  };
}

module.exports = createForwardingHandlerFactory;