Blockchain Marketplace Case Study | V2A by NetSet Software

The Problem

Nearly all the online marketplaces face issues with trust where buyers worry about product authenticity, sellers face risks of fraud, and both sides worry about a reliable way to verify condition or ownership history.

With such a condition, trading high value goods was never an easy option due to no transparent record of past use, inspections, or payments. And, most of the marketplaces fail in handling disputes that are common among the parties

V2A decided to solve these issues with a dApp where every transaction is clear, payments are protected with smart contracts, and product details are permanently recorded on blockchain. It was a challenge to design a mobile first solution that could balance usability, security, and trust with all the problems traditional marketplaces were facing.

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The Challenges

V2A wanted to solve two biggest issues in online marketplaces like proof of product authenticity for buyers and secure payments for sellers. We had to design a blockchain system that uses smart contracts in the best possible way while keeping the mobile experience simple and reliable.

Product Authenticity:

Buyers a lot of times hesitate to purchase second hand or high value goods as they are not able to verify the true condition of the product. This led to disputes, and V2A needed a way to guarantee authenticity through checks so that every item listed had proof of inspection and accurate details that cannot be changed.

Payment Security:

It was so common to have fraud risks for buyers and sellers because payments are mostly made without guarantees, leaving one party always vulnerable if disputes arise. V2A required a secure escrow system that locked funds until both sides confirmed completion, protects buyers from scams and gives sellers confidence that they would be paid fairly.

Ownership Transparency:

Resale items lack a clear history of ownership, pricing, or condition changes. This gap reduces trust and limits resale value. V2A needed a blockchain-based solution to track product lifecycle data, like buy/sell history, inspections, and feedback, so there is a transparent record that buyers could rely on before making a purchase.

Validator Role:

To build trust, V2A wanted separate validators to inspect products physically and digitally. The challenge was to design a system where validators were verified, priced fairly, and prevented from fraudulent practices. This required geo tagged image capture, KYC verification, and a commission model that aligns validator success with platform success.

Real Time Auctions:

The client wanted to have live bidding for products which means we had to make the platform resilient to handle multiple users, bids, and updates in real time. It was important that the backend was capable of syncing blockchain transactions with auction activity without delays or errors.

Scalability and Usability:

Despite how complex is blockchain as a topic, the final product must always be easy to the end users which again comes with its own set of challenges. The client wanted us to bring advanced blockchain features but in a simple mobile interface so that the platform is easy to scale as well as get more adoption.

Verified Product Authenticity

A validator system was introduced where KYC verified specialists inspect products physically. Geo tagged photos and inspection data are recorded on the blockchain thus making a permanent record of authenticity and condition that buyers can trust.

Secure Escrow Payments

Smart contract escrow was applied to lock buyer funds during transactions. Payments are only released once the buyer confirms delivery or disputes are solved to pay sellers fair while buyers remain fully protected against fraud.

Blockchain Ownership Records

The lifecycle of every product can be tracked on VeChain, like ownership changes, price history, and inspection details. This immutable record delivers transparency for resale items, so buyers can see the full history before purchase and sellers to prove platform authenticity.

Validator Incentive Model

Validators earn commissions only when a sale completes. This system keeps validators motivated to provide accurate inspections, while geo tagging prevents fraudulent listings and makes trust across the marketplace stronger.

Real Time Auction System

A mobile first auction system was built using Node.js and Flutter where buyers could bid live, with blockchain sync with promised fairness and transparency. This feature makes trading fast, interesting, and secure for both buyers and sellers.

Scalable Mobile Architecture

The platform was built with Flutter for mobile apps and AWS for cloud infrastructure as this combination gives best scalability, high performance, and simple usability to everyday users while also letting V2A access rapid and flexible growth across regions.

A secure mobile app platform that connects buyers, sellers, and validators with transparency

Tech stack

Flutter

VeChain

Solidity

Express.js

Node.js

AWS

The Result

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