Ithamar

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  Ithamar: every row checked against the statement's own running balance

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  The browser tool: the statement never leaves the tab

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  How the running balance proves each row

Inspiration

Bank statement extractors quietly get rows wrong, and nobody notices until the totals do not add up. But every statement already carries its own answer key: the running balance.

What it does

Ithamar checks every row of an Indian bank statement PDF against the statement's own running balance. A break is fixed only when exactly one explanation fits. A missing transaction is flagged for a person, never invented.

How I built it

A Python engine (pdfplumber) tested with Hypothesis property tests, and the same engine in TypeScript with pdf.js, so it runs in the browser and a statement never leaves the tab.

Accomplishments that I'm proud of

• On 24 generated statements with 39 injected errors: 0 rows wrongly marked proven
• Privacy by architecture: the browser version never uploads a statement

What's next

More bank formats, and scanned statements.

Built With

• hypothesis
• pdf.js
• pdfplumber
• python
• typescript