MicroBounty

A decentralized bounty marketplace built natively on Polkadot Hub


This project implements Idea #141 (Bounty Payment Platform) using Polkadot Hub's EVM-compatible smart contracts. While the original specification suggested Dedot/PAPI, we chose Solidity to leverage broader developer accessibility while still delivering all core features:

• Multi-currency support,
• Transaction history,
• Analytics, and
• Seamless bounty workflows.

What Is MicroBounty?

MicroBounty is an on-chain bounty platform that lets projects post tasks and pay contributors instantly and trustlessly using native DOT or stablecoins (USDC, USDT) on Polkadot Hub.

No middlemen. No escrow disputes. No waiting. Work gets done, payment gets sent.

The Problem

Polkadot's ecosystem is growing fast, but coordinating small paid work is still painful:

• Projects post bounties in Discord and lose track of them
• Contributors do work with no guarantee of payment
• Existing bounty tools don't support DOT or Polkadot-native currencies
• Grant processes are too heavy for small tasks

The Solution

For Projects	For Contributors
Post bounties in DOT or stablecoins	Browse real paid opportunities
Funds locked in escrow automatically	Get paid the moment work is approved
Approve or cancel with one click	Build an on-chain work history
Full analytics dashboard	No upfront networking required

How It Works

1. CREATE    →   Project posts bounty — funds locked in escrow on-chain
2. SUBMIT    →   Developer submits proof of work (GitHub PR, link, etc.)
3. APPROVE   →   Project approves — payment transfers instantly, trustlessly

Status lifecycle: OPEN → IN_PROGRESS → COMPLETED (or CANCELLED before submission)

Why Polkadot Hub?

MicroBounty is built specifically for Polkadot Hub, not ported from another chain.

Native DOT Payments (10 Decimals)

DOT has 10 decimal places — not 18 like ETH. Our contract and frontend handle this as a first-class design decision throughout, with no silent precision loss.

uint256 public constant MIN_REWARD_DOT = 100e10; // 100 DOT, correct decimals

// Every DOT display and input in the frontend
ethers.formatUnits(amount, 10)
ethers.parseUnits(input, 10)

EVM on Polkadot Hub

We deploy Solidity contracts directly on Polkadot Hub's EVM layer — demonstrating the full Hardhat → Polkadot Hub pipeline end-to-end with real users and live transactions.

Multi-Wallet Support

Supports MetaMask, SubWallet, Talisman, and any EIP-1193 wallet via Reown AppKit.

Deployed and Verifiable

0x73fC6177262D64ca26A76ECbab8c1aeD97e84AC5 on Polkadot Hub Testnet (Chain ID: 420420417).

Platform Statistics

Testnet — March 2026

Metric	Value
Total Value Transacted	$20,000+
Paid to Contributors	$4,000+
Bounties Posted	30+
Completion Rate	34%
Cancellation Rate	13%

Smart Contract (/contract)

• Solidity 0.8.28 · Hardhat · Polkadot Hub Testnet
• Multi-currency escrow — native DOT + ERC20 (USDC, USDT)
• OpenZeppelin ReentrancyGuard + SafeERC20
• Checks-Effects-Interactions on all payment functions
• On-chain analytics — platform stats, per-user stats, currency breakdown
• 41 passing tests — full lifecycle coverage

Frontend (/frontend)

• Next.js 15 (App Router) + TypeScript
• Tailwind CSS — responsive, dark/light mode
• Reown AppKit — MetaMask, SubWallet, Talisman
• ethers.js v6 — correct 10-decimal DOT handling throughout
• BountyContext — on-chain state, filtering, pagination
• WalletContext — PAS + ERC20 balance fetching, wallet name detection

Quick Start

Try It Now

1. Visit micro-bounty.vercel.app
2. Connect wallet (MetaMask/SubWallet)
3. Switch to Polkadot Hub Testnet
4. Get testnet DOT from [faucet link]
5. Create your first bounty!

Demo Video

5-minute walkthrough of creating, submitting, and approving a bounty

Documentation

• Architecture: ARCHITECTURE.md - Technical design and decisions
• Smart Contract: contract/README.md - Contract deployment and testing
• Frontend: frontend/README.md - Frontend setup and development

Roadmap

v1.0 — Live ✅

• Multi-currency bounties (DOT, USDC, USDT)
• Trustless escrow and instant payment
• On-chain analytics and transaction history
• Mobile-responsive UI, dark/light mode

v2.0 — Planned 🔄

• XCM integration for cross-chain bounties
• On-chain reputation system
• Milestone-based payments
• Dispute resolution

v3.0 — Vision 🔭

• Parachain governance integration
• GitHub issue → bounty automation
• Skills-based contributor matching

Repository Structure

MicroBounty/
├── contract/
│   ├── contracts/MicroBounty.sol
│   ├── contracts/MockERC20.sol
│   ├── test/MicroBounty.test.js
│   ├── scripts/deploy.js
│   ├── scripts/deployMocks.js
│   └── README.md
└── frontend/
    ├── app/
    ├── components/
    ├── context/
    │   ├── BountyContext.tsx
    │   └── WalletContext.tsx
    ├── lib/
    └── README.md

Contributing

git clone https://github.com/phertyameen/MicroBounty/

• Smart Contract: contract/README.md
• Frontend: frontend/README.md

Team

Built by Fatima Aminu for the OpenGuild Hackathon 2025.

Special thanks to OpenGuild and Web3 Foundation.

Contact: @teemahbee · LinkedIn · Gmail

MIT License · MicroBounty — where projects and talent meet on Polkadot.