Digital eSignature and eStamping Using SpringBoot
In today’s fast-paced digital world, the need for secure and efficient document signing and stamping has never been greater. Leveraging SpringBoot and a third-party SDK for digital eSignature and eStamping can streamline these processes, ensuring documents are securely signed and validated in real-time. This blog explores how to integrate and utilize these technologies to achieve seamless document management.
Key Benefits :
- Enhanced Security: Digital signatures ensure the authenticity and integrity of documents.
- Improved Efficiency: Automated processes reduce the time required for document handling.
- Cost-Effective: Eliminates the need for physical paper, printing, and postage.
- Compliance: Meets legal and regulatory requirements for digital transactions.
System Architecture :
The system architecture involves multiple components working together to ensure smooth document processing.
- SpringBoot Application: Manages document generation, validation, and communication with the third-party SDK.
- Third-Party SDK: Provides APIs for digital eSignature and eStamping.
- Webhook Endpoint: Receives updates from the third-party SDK regarding document status.
Implementation Steps :
1. Prepare HTML Template with Dynamic Tokens
The first step involves creating an HTML template that includes dynamic tokens. These tokens will be replaced with actual data when generating the PDF document.
<!DOCTYPE html>
<html>
<head>
<title>Document Template</title>
</head>
<body>
<h1>Contract Agreement</h1>
<p>Dear {{name}},</p>
<p>Please find the details of your contract below:</p>
<ul>
<li>Contract ID: {{contractId}}</li>
<li>Start Date: {{startDate}}</li>
<li>End Date: {{endDate}}</li>
</ul>
<p>Thank you!</p>
</body>
</html>
2. Generate Dynamic PDF Document
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
import java.util.Map;
@Service
public class PdfService {
private final TemplateEngine templateEngine;
public PdfService(TemplateEngine templateEngine) {
this.templateEngine = templateEngine;
}
public String generateHtml(Map<String, Object> data) {
Context context = new Context();
context.setVariables(data);
return templateEngine.process("documentTemplate", context);
}
// Method to convert HTML to PDF
public byte[] generatePdf(String html) {
// PDF generation logic here
}
}
3. Integrate with Third-Party SDK for eSignature and eStamping
After generating the PDF, send it to the third-party SDK for digital eSignature and eStamping.
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;
@Service
public class SignatureService {
private final RestTemplate restTemplate;
@Autowired
public SignatureService(RestTemplate restTemplate) {
this.restTemplate = restTemplate;
}
public String sendDocumentForSigning(byte[] pdf) {
// Logic to send PDF to third-party SDK
}
}
4. Handle Webhook Updates
The third-party SDK will send updates via a webhook when the document status changes. Implement an endpoint to handle these updates.
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class WebhookController {
@PostMapping("/webhook")
public void handleWebhook(@RequestBody WebhookPayload payload) {
// Logic to handle document status updates
}
}
5. Validate and Download the Signed Document
Once all signatures are completed, validate the document and provide an option to download it.
import org.springframework.stereotype.Service;
@Service
public class DocumentValidationService {
public boolean validateDocument(String documentId) {
// Logic to validate the signed document
}
public byte[] downloadDocument(String documentId) {
// Logic to download the validated document
}
}
Conclusion :
Integrating digital eSignature and eStamping using SpringBoot and a third-party SDK offers a robust solution for secure and efficient document management. This approach not only enhances operational efficiency but also ensures compliance with legal standards. By following the outlined steps, organizations can streamline their document handling processes and embrace the benefits of digital transformation.