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Node Sales Platform

Web3 DApp

System Description

Solo-built Web3 node sales platform: Factory-based multi-tier contracts + wallet signing purchase flow + backend operations APIs (sales/referrals/users/withdrawals) + admin dashboard.

Technologies

SolidityNext.jsReactExpressTypeORMPostgreSQL
Node Sales Platform
ROLE: SOLO_DEVELOPERDOMAIN: BLOCKCHAIN
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PROBLEMThe Challenge

Had to keep purchases verifiable (signature integrity, tier handling) while supporting real operations: referrals, admin controls, seller/user flows, email verification, and withdrawal handling.

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SOLVEDThe Solution

Implemented EIP-191 signature verification in both frontend signing flow and contracts (Factory purchase flow). Built an Express + TypeORM backend with JWT auth + permission middleware and operational route groups (sales/referrals/dashboard/withdrawals/users), plus a protected admin UI for day-2 operations.

Technical Deep Dive

Overview

  • ▶Solo-built Web3 node sales platform with contracts + backend + admin dashboard.

Key Components

  • ▶Factory-pattern contract architecture for tiers/products
  • ▶EIP-191 signature verification for purchase integrity
  • ▶Backend auth + permission middleware and operational tooling (sales/referral/dashboard/withdrawals/email verification)