# 🏦 VaultParser — Pure Rust Bank Statement Extractor
[](https://crates.io/crates/vaultparser) [](https://docs.rs/vaultparser) [](https://github.com/SV-stark/VaultParser/actions/workflows/release.yml) [](https://github.com/SV-stark/VaultParser/blob/main/LICENSE)
VaultParser is a high-performance, secure, offline-only library and interactive web service built in **pure Rust** for extracting tabular transaction ledgers from PDF bank statements.
It is designed to be **100% Python-free**, utilizing native Rust parsers and coordinate-clustering engines to process PDF structures with zero external runtimes (including native support for decrypting AES-256 encrypted PDFs with empty passwords using `lopdf 0.39.0`).
---
## 🚀 Key Features
* **📦 Native Rust Library**: Can be integrated directly into other Rust applications.
* **🛠️ Builder-Pattern Configurations**: Programmatic setup of column boundaries, row tolerance margins, page trimming, and transaction row filters.
* **🏦 Indian Bank Presets**: Out-of-the-box templates for:
* HDFC Bank
* State Bank of India (SBI)
* Canara Bank
* Union Bank of India
* UCO Bank
* Indian Bank
* H P State Co-operative Bank (HPSCB)
* ICICI Bank
* Punjab National Bank (PNB)
* Kotak Mahindra Bank
* **✨ Interactive Web UI**: Includes a web-based visual dashboard where you can:
* Drag, double-click to add, or right-click to delete vertical column guides over the PDF canvas.
* Crop header/footer regions in real-time.
* Directly override cell values or delete rows with coordinates that persist across exports.
* **💾 Multi-format Exporters**: Bulk compile transaction history to `.xlsx` (Excel) or `.csv`.
---
## 📂 Project Structure
```text
├── src/
│ ├── lib.rs # Core library entry point
│ ├── config.rs # Extraction parameter builder (ExtractionConfig)
│ ├── presets.rs # Native bank column coordinate templates
│ ├── parser.rs # Core Y-coordinate clustering engine
│ ├── models.rs # Word, Row, and Table structures
│ ├── exporter.rs # CSV & XLSX exporting utilities
│ ├── error.rs # Custom library error handling
│ ├── main.rs # Local web UI server binary
│ └── bin/
│ └── cli.rs # Command line tool binary
├── static/ # Frontend assets (HTML, style.css, app.js, pdf.js)
├── temp/ # Temporary parsing folder (automatically cleaned up)
└── Cargo.toml # Cargo package file
```
---
## 📖 Library Usage Example
Add the library to your own Rust application to parse statements programmatically:
```rust
use vaultparser::{ExtractionConfig, BankPreset, extract_from_file};
use vaultparser::exporter::export_to_csv;
fn main() -> Result<(), Box<dyn std::error::Error>> {
// 1. Load HDFC preset column coordinates
let config = BankPreset::Hdfc.config();
// 2. Natively extract tabular data from statement
let table = extract_from_file("statement.pdf", &config)?;
println!("Parsed {} transaction rows!", table.rows.len());
// 3. Export ledger to CSV bytes
let csv_bytes = export_to_csv(&table)?;
std::fs::write("statement_ledger.csv", csv_bytes)?;
Ok(())
}
```
---
## 💻 Running the CLI Tool
You can run the extraction directly from the command line without opening a browser. The CLI utilizes `clap` for command-line parsing and option handling:
```bash
# Print CSV results to stdout:
cargo run --release --bin cli -- <input-pdf> <bank-preset> [options]
# Save CSV or Excel (.xlsx) results directly to a file:
cargo run --release --bin cli -- <input-pdf> <bank-preset> [output-file] [options]
```
### Examples:
```bash
# Output HDFC statement directly to stdout
cargo run --release --bin cli -- "hdfc bank.pdf" hdfc
# Save Union Bank statement output to statement.csv
cargo run --release --bin cli -- "statement.pdf" union output.csv
# Save Union Bank statement output directly to Excel
cargo run --release --bin cli -- "statement.pdf" union output.xlsx
# Auto-detect bank preset, decrypt with password, and save output
cargo run --release --bin cli -- secure_statement.pdf auto output.csv --password "secret123"
```
---
## 🏃 Running the Web UI
1. Make sure you have the Rust toolchain installed.
2. Start the local server:
```bash
cargo run --release
```
3. Open your browser and navigate to:
**[http://localhost:8000/](http://localhost:8000/)**
---
## 📋 Step-by-Step Usage Guide
### A. Using the Web Dashboard (Interactive Visual Extraction)
1. **Upload Statement**: Drag and drop your PDF bank statement into the upload zone.
2. **Apply Preset**: Select your bank (e.g. *HDFC Bank*) from the **Preset Selector** dropdown. The vertical column guides will automatically overlay on the PDF preview.
3. **Refine Columns**:
* **Move**: Drag existing vertical red lines to match the statement's columns.
* **Add**: Double-click anywhere on the PDF canvas to add a new vertical guide.
* **Remove**: Right-click on any guide to delete it.
4. **Trim Headers & Footers**: Adjust the **Top Trim** and **Bottom Trim** slider percentages to exclude running page headers, summaries, or footers.
5. **Review & Override Data**:
* **Edit cells**: Double-click any cell in the live preview table to correct typos.
* **Delete rows**: Click the red `✕` on any row to delete headers or background noise.
* *Note: Manual edits are locked to PDF coordinates and persist when you switch pages or export!*
6. **Download Ledger**: Click **Export to Excel (.xlsx)** or **Export to CSV** to save the formatted ledger.
### B. Integrating the Rust Library in Your Code
1. **Add Cargo Dependency**:
Add `vaultparser` to your project's `Cargo.toml`. To include the visual Web UI server and its async framework dependencies, enable the optional `web` feature:
```toml
[dependencies]
vaultparser = "0.1.7"
# Or with the optional web UI:
# vaultparser = { version = "0.1.7", features = ["web"] }
```
2. **Define Configuration**: Use pre-configured bank presets or customize via the builder pattern (which returns a `Result` for validation since `v0.1.6`):
```rust
let config = vaultparser::BankPreset::Hdfc.config();
let config = vaultparser::ExtractionConfig::builder()
.col_guides(vec![0.11, 0.42, 0.52, 0.62, 0.75, 0.88])
.col_mappings(vec![
"date".to_string(),
"description".to_string(),
"reference".to_string(),
"skip".to_string(),
"debit".to_string(),
"credit".to_string(),
"balance".to_string(),
])
.y_top_trim(0.0)
.y_bottom_trim(1.0)
.build()?;
```
3. **Run Extraction**: Pass the PDF file path or byte buffer to the parser:
```rust
let table = vaultparser::extract_from_file("my_statement.pdf", &config)?;
```
4. **Save Export**: Output the transaction data directly:
```rust
let csv_data = vaultparser::exporter::export_to_csv(&table)?;
std::fs::write("statement.csv", csv_data)?;
```
---
## 🧪 Testing
To run the built-in unit and integration test suite:
```bash
cargo test -- --nocapture
```
This runs coordinate/amount parsing tests, an extraction check against the sample HDFC statement, and a full integration extraction check on the user's statement `hdfc bank.pdf` to verify native decryption.
---
## 🪵 Logging & Diagnostics
The library utilizes the standard `tracing` crate for diagnostic logging. Both the Web UI and CLI binaries are pre-configured to output formatted logs to stdout.
You can control the log verbosity using the `RUST_LOG` environment variable:
* **Show only start-up and high-level extraction counts (default):**
```powershell
# Windows PowerShell
$env:RUST_LOG="info"
cargo run --bin cli -- "hdfc bank.pdf" hdfc
```
```bash
export RUST_LOG=info
cargo run --bin cli -- "hdfc bank.pdf" hdfc
```
* **Show page-by-page word counts and layout details (debug):**
```powershell
$env:RUST_LOG="debug"
cargo run --bin cli -- "hdfc bank.pdf" hdfc
```
---
## 🛡️ License
Distributed under the GNU Affero General Public License v3.0 (AGPL-3.0). Offline-only, secure, and private by design.