GigaSignature Documentation

Introduction

Welcome to the GigaSignature documentation, your eIDAS-compliant electronic signature solution. This documentation will guide you through all the features of our platform, from quick start to advanced API integrations.

Getting Started

GigaSignature simplifies the electronic signature process in 3 simple steps:

1. Upload your PDF document
2. Configure signature areas and invite signers
3. Sign and receive the certified document

Create Account

To start using GigaSignature, you need to create an account:

Registration Steps

1. Access the registration page

   Click "Create Account" from the homepage

2. Fill out the form
   • Full name
   • Professional email address
   • Secure password (min. 8 characters)
   • Organization name
3. Verify your email

   A confirmation email will be sent to you

4. Configure your profile

   Add billing information if necessary

Upload Document

Accepted Formats

GigaSignature only accepts PDF documents to ensure integrity and compatibility.

How to Upload

1. Log in to your dashboard
2. Click "New Signature Process"
3. Drag and drop your PDF or click to browse
4. Wait for the upload to complete

Configure Signature

Signature Areas

Use our visual editor to place signature areas:

• Drag and drop: Position areas where you want
• Resize: Adjust size as needed
• Assign: Allocate each area to a signer
• Order: Define signing order if necessary

Signature Options

Security Settings

• Mandatory OTP: Require code verification
• OTP Method: Email, SMS, or signer's choice
• Expiration Date: Time limit for signing

Invite Signers

Add Signers

For each signer, you must provide:

• Full name: For identification
• Email: To receive invitation
• Phone (optional): For SMS OTP
• Custom message: Specific instructions

Types of Signers

Sign Document

Signing Process

1. Receive invitation

   Signer receives email with secure link

2. Verify identity

   Enter OTP code received by email or SMS

3. Review document

   Read all pages of the document

4. Apply signature

   Click "Sign" to validate

5. Download certificate

   Receive signed document and certificate

Track Status

Possible States

Notifications

You receive notifications for:

• Each signature applied
• Signature refusals
• Process completion
• Automatic reminders

Download Certificate

Available Documents

Once the process is complete, you can download:

• Signed document: PDF with all signatures
• Signature certificate: Legal proof of process
• Audit trail: Detailed log of actions

Certificate Content

API Integration

Getting Started with API

GigaSignature offers a complete RESTful API to integrate electronic signature into your applications.

Authentication

Use your API key in the Authorization header:

Complete Example: Create a Signature Process

Here's a complete example to create and send a signature process:

curl -X POST https://api.giga-signature.com/api/v1/documents \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY" \
  -H "Accept: application/json" \
  -F "file=@contract.pdf" \
  -F "name=Service Contract 2025"

{
  "data": {
    "id": "doc_abc123",
    "name": "Service Contract 2025",
    "pages": 5
  }
}

curl -X POST https://api.giga-signature.com/api/v1/signature-processes \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Client ABC Contract",
    "description": "Annual service contract",
    "sequential_signing": false,
    "require_otp": true,
    "otp_method": "choice",
    "documents": [
      {
        "document_id": "doc_abc123",
        "order": 1
      }
    ],
    "signers": [
      {
        "name": "John Smith",
        "email": "john.smith@example.com",
        "phone": "+14155552671",
        "language": "en"
      },
      {
        "name": "Jane Doe",
        "email": "jane.doe@example.com",
        "language": "en"
      }
    ]
  }'

curl -X POST https://api.giga-signature.com/api/v1/signature-processes/proc_7h8i9j0k/fields \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "fields": [
      {
        "document_id": "doc_abc123",
        "signature_id": "sig_1a2b3c4d",
        "type": "signature",
        "label": "Client Signature",
        "page": 5,
        "position_x": 15,
        "position_y": 70,
        "width": 25,
        "height": 10
      },
      {
        "document_id": "doc_abc123",
        "signature_id": "sig_2b3c4d5e",
        "type": "signature",
        "label": "Partner Signature",
        "page": 5,
        "position_x": 50,
        "position_y": 70,
        "width": 25,
        "height": 10
      }
    ]
  }'

curl -X POST https://api.giga-signature.com/api/v1/signature-processes/proc_7h8i9j0k/send \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY"

Digital Vault

Access signed documents stored securely:

curl -X GET "https://api.giga-signature.com/api/v1/vault/documents?status=active&tags=contract,2025" \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY"

curl -X GET "https://api.giga-signature.com/api/v1/vault/documents/123/package" \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY" \
  -o "document-package.zip"

Webhooks

Configure webhooks to receive real-time notifications:

curl -X POST https://api.giga-signature.com/api/v1/webhooks \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://your-app.com/webhooks/signature",
    "events": [
      "signature.completed",
      "signature.refused",
      "process.completed"
    ],
    "active": true
  }'

$payload = file_get_contents('php://input');
$signature = 'sha256=' . hash_hmac('sha256', $payload, $webhook_secret);
$is_valid = hash_equals($signature, $_SERVER['HTTP_X_SIGNATURE']);

const crypto = require('crypto');
const signature = 'sha256=' + crypto
  .createHmac('sha256', webhookSecret)
  .update(payload)
  .digest('hex');
const isValid = signature === req.headers['x-signature'];

Archives

Access archived processes after 90 days:

curl -X GET https://api.giga-signature.com/api/v1/archives/123/download \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY" \
  -o "archive-process-123.zip"

Error Handling

The API returns structured error messages:

{
  "error": {
    "code": "validation_error",
    "message": "The provided data is invalid",
    "errors": {
      "signers.0.email": ["The email address is invalid"],
      "file": ["The file must be a PDF"]
    }
  }
}

Available SDKs

Security

Security Measures

GigaSignature implements best security practices:

Compliance

• eIDAS: European regulation on electronic identification
• GDPR: Personal data protection
• ISO 27001: Information security management

Frequently Asked Questions

Support

Need Help?

Our team is here to assist you: