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CoinBay: Decentralized Marketplace

Project Concept

A fully decentralized, immutable, and censorship-resistant eBay-style marketplace built entirely on public blockchains. CoinBay features on-chain listings, auctions, escrow, reputation, and governance with a native DAO that elects staked moderators to arbitrate disputes.

CoinBay decentralized marketplace showing product listings with MetaMask integration

Key Features

On-Chain Listings & Auctions

Fully decentralized product listings and auctions managed through Solidity smart contracts with no central authority or intermediary.

Trustless Escrow System

Secure escrow contract holds buyer funds until delivery confirmation, with built-in dispute resolution through staked moderators.

Reputation & Feedback

On-chain reputation system with immutable feedback records tied to wallet addresses, creating a trustless credibility framework.

DAO Governance

Community-controlled platform with token-weighted voting on protocol upgrades, fee structures, and moderator elections.

IPFS Content Storage

Product images and metadata stored on IPFS with only content hashes stored on-chain, ensuring censorship resistance and data permanence.

Modular Smart Contracts

Upgradeable contract architecture with separate modules for listings, auctions, escrow, feedback, governance, and moderator staking/slashing.

Architecture Overview

CoinBay is built with a modular smart contract architecture that ensures complete decentralization and censorship resistance:

  • Frontend: React SPA hosted on IPFS and accessible via Unstoppable Domains, ensuring the interface can never be taken down
  • Smart Contract Suite: Modular contracts for token, listings, auctions, escrow, feedback, governance, and moderator staking
  • Data Storage: Product metadata and images stored on IPFS with only content hashes stored on-chain
  • Governance: DAO-controlled protocol with token-weighted voting for upgrades and parameter changes
  • Moderation: Staked moderators elected by the DAO to resolve disputes with slashing mechanisms for bad actors
  • Compensation Fund: Slashed tokens accumulate in a community fund to compensate users in cases of fraud

Technical Stack

frontend

React
TypeScript
Web3.js
IPFS
Unstoppable Domains

smart Contracts

Solidity
OpenZeppelin
Hardhat
Proxy Pattern
ERC-20

governance

DAO
Token-weighted Voting
Timelock
Moderator Staking

infrastructure

IPFS/Pinata
The Graph
Ethereum/L2
CI/CD Pipeline

Decentralization Advantages

0%
Platform Fees
No Middleman
100%
Transparent
On-Chain Verification
DAO
Governance
Community Controlled

CoinBay eliminates traditional platform fees and intermediaries. All transactions are secured by smart contracts, disputes are resolved by community governance, and the entire platform operates transparently on the blockchain. The frontend is hosted on IPFS under an Unstoppable Domain, ensuring it can never be taken down by central authorities.

Interested in This Concept?

Let's discuss building a decentralized marketplace platform that eliminates intermediaries and empowers users.