CryptoAuditX

Inspiration

Crypto users trade across wallets and exchanges, but tax reporting is still confusing and manual. We were inspired by how hard it is to answer: “What do I owe?”, “Am I compliant?”, and “What should I do next?”

What it does

CryptoAuditX ingests transactions in a wallet, reconstructs portfolio activity, calculates gains using FIFO, flags compliance risks (missing prices, unclassified transactions, transfer ambiguity), and simulates tax-aware sell/hold scenarios with recommendations using AI automation.

How we built it

Frontend: Next.js 14 + TypeScript + Tailwind + Recharts
Backend: NestJS APIs for ingestion, compliance, and simulation
Core engine: Shared TypeScript FIFO tax engine for deterministic gain/loss calculations
Flow: Wallet Address → processing → portfolio analytics → compliance checks → scenario simulation/report export

Challenges we ran into

Inconsistent metadata and token naming across sources
Missing historical price data for some transactions
Correctly matching transfers without double-counting taxable events
Making complex tax/compliance output easy to understand in UI

Accomplishments that we're proud of

Built an end-to-end working pipeline from wallet addresses to actionable insights
Implemented deterministic FIFO-based tax calculations
Added compliance risk scoring and audit-style flag tracking
Delivered scenario simulation so users can plan decisions, not just report history

What we learned

Trust comes from deterministic, explainable tax logic
Data normalization is the hardest part of crypto tooling
Good UX is critical for compliance products
Simulation adds major practical value beyond static tax reports

What's next for CryptoAuditX

Add more exchange/wallet connectors and on-chain ingestion
Improve price oracle coverage and confidence scoring
Expand jurisdiction-specific tax rules and reporting templates
Introduce automated remediation workflows for compliance flags
Generate richer AI-powered recommendations with clearer rationale

Built With

apis
claude
nemotron
nest.js
next.js
typescript

Submitted to

2026 Startup Week Buildathon

Created by

I focused on frontend UI/UX and backend API integrations. On the frontend, I worked on the compliance section (layout, section labels, metric cards, risk flags table, and insights card), scenario controls on the Simulate tab (custom dropdowns for time range and asset filter with glassmorphism styling, validation messaging), and shared UI polish (card borders and hover states, subheading typography, chart tooltips and centering). I also implemented the financial-year and time-range custom dropdowns so they work and look consistent on the dark theme, updated the landing page (navbar visibility, copy, spacing, floating boxes), and applied the cryptoAuditX branding across the app. On the integration side, I connected the frontend to the compliance and simulation APIs, wired the Nemotron AI insights flow for the Portfolio tab (including fallback behavior when the API fails), and ensured the FY selector and report download use the correct backend endpoints and payloads.

Pragya Awasthi
Aditya Jha
Kiran Ghumare
Aritro Roy