Upload files

import multer from 'multer';
import { walletMiddleware, payMiddleware, vaultMiddleware } from '@prudra/express';

const upload = multer({ storage: multer.memoryStorage() });

app.post(
  '/process-file',
  walletMiddleware({ walletId: 'mwt_clx1abc123' }),
  payMiddleware({ price: '0.10', description: 'File processing' }),
  vaultMiddleware(),
  upload.single('file'),
  async (req, res) => {
    const vault = req.vault!;

    // Upload the submitted file
    const file = await vault.addFile(
      req.file!.buffer,
      req.file!.originalname,
      req.file!.mimetype,
    );

    // Upload a generated file (e.g., a PDF result)
    const pdfBuffer = await generatePDF(req.file!.buffer);
    const result = await vault.addFile(pdfBuffer, 'report.pdf', 'application/pdf');

    await vault.seal('Processing complete');

    res.json({
      vaultId:     vault.id,
      originalUrl: file.url,
      reportUrl:   result.url,
    });
  }
);