PermiPay

PermiPay: Permission-Metered Web3 Analytics

THE PROBLEM: Subscription Fatigue & UX Friction in Web3

New crypto users face multiple barriers:

1. Approval Hell: Every transaction requires a MetaMask popup. Analyze 5 contracts? Click "Approve" 5 times. This repetitive signing drives users away.

2. Gas Fee Anxiety: Each approval costs gas. A $0.05 query can cost $2-5 in gas during congestion—users pay more in gas than for the service.

3. Subscription Lock-In: Pay $20/month but only use 2 features? You're locked in. Cancel and lose access entirely.

4. Zero Transparency: No itemized billing, no real-time tracking, just blind monthly charges.

5. All-or-Nothing Access: Pay for full subscription or get nothing. No middle ground for occasional users.

Result: Users abandon Web3 analytics tools within the first week due to high friction and unpredictable costs.

OUR SOLUTION: Pay for What You Actually Use

1. One-Time Permission Grant

• Grant bounded USDC allowance once (e.g., $10 for 30 days)

• No more popups or repeated approvals

• Example: Grant $10 → Use 20 services seamlessly

2. Pay-Per-Use Pricing

• Contract Inspector: $0.05 | Wallet Audit: $0.15 | Wallet Reputation: $0.10

• Use 3 services? Pay $0.30. Use 50? Pay exactly what you used.

3. Gasless Execution

• Pimlico paymaster sponsors all gas via ERC-4337

• Analyze 10 contracts = $0.50 total (not $0.50 + $30 gas)

4. Real-Time Transparency

• Live dashboard shows every charge

• Transaction history with Etherscan links

• Budget tracking: "$3.40 spent of $10.00 limit"

5. Full Control

• Set spending caps and expiration dates

• Revoke permission anytime

• No hidden charges

HOW METAMASK ADVANCED PERMISSIONS (ERC-7715) POWERS THIS

ERC-7715 enables delegated permissions—users grant a session account permission to spend a limited amount on their behalf.

Traditional vs PermiPay Flow:

Without ERC-7715: Click button → MetaMask popup → Confirm → Wait → Repeat for EVERY transaction

With ERC-7715: Grant permission ONCE → Use services seamlessly → No popups ever again

Implementation:

One-time permission grant
await erc7715Client.requestExecutionPermissions([{
chainId: sepolia.id,
permission: {
type: 'erc20-token-periodic',
data: {
tokenAddress: USDC_ADDRESS,
periodAmount: '10000000', // $10.00
periodDuration: 2592000, // 30 days
}
}
}]);

Seamless execution (no popup)
await executeService(ServiceType.CONTRACT_INSPECTOR, contractAddress);
$0.05 automatically deducted

Benefits:

• No repetitive approvals

• Bounded spending limits with expiration

• Users can revoke anytime

• All permissions visible in MetaMask

• Combined with ERC-4337 for $0 gas fees

HOW ENVIO HYPERINDEX POWERS REAL-TIME ANALYTICS

Envio is a real-time blockchain indexer that syncs smart contract events to a GraphQL database in 2-3 seconds.

Why We Need It:

Without Envio: Transaction confirmed (12s) → Query blockchain → Parse logs → Update UI = 30-60 seconds

With Envio: Transaction confirmed (3s) → Envio indexes (2s) → GraphQL returns data = 5 seconds total

What Envio Indexes:

event PermissionGranted(address user, uint256 limit, uint256 expiresAt);
event ServiceExecuted(address user, uint8 serviceType, uint256 cost);

GraphQL Queries:

User Dashboard
query UserData($address: String!) {
ServiceExecution(where: {user: {_eq: $address}}) {
serviceType
cost
timestamp
transactionHash
}
ServiceExecution_aggregate {
aggregate {
sum { cost } # Total spent: $3.80
count # Total transactions: 25
}
}
}

Benefits:

• 2-3 second indexing latency

• GraphQL API for easy integration

• Full transaction history instantly

• Real-time dashboard updates

• Platform-wide analytics

ARCHITECTURE & TECH STACK

Flow:

1. Grant Permission (one-time) → MetaMask ERC-7715 + session account created

2. Use Service (seamless) → No popup, Pimlico executes, $0 gas

3. Envio Indexes (2s) → Event captured, GraphQL updated

4. Dashboard Updates (instant) → Real-time budget and history

Technology:

Frontend: Next.js 15, TypeScript, TailwindCSS, Wagmi, Viem, Chart.js

Smart Contracts: PermiPayBilling (Sepolia), USDC Token, Solidity

Account Abstraction: ERC-4337, Pimlico bundler/paymaster

Permissions: ERC-7715 (MetaMask Flask)

Indexing: Envio HyperIndex v2.32.3, GraphQL, PostgreSQL

APIs: Etherscan, Groq AI (Llama 3.3 70B)

KEY FEATURES & SERVICES

For Users:

• One-Time Setup: Grant permission once, use forever

• Transparent Pricing: $0.05-$0.15 per feature, no hidden fees

• Zero Gas Fees: Pimlico sponsors all gas

• Budget Control: Set limits, expiration dates, revoke anytime

• Real-Time Dashboard: Track spending, view history with Etherscan links

Available Services:

Contract Inspector ($0.05): Analyze verified Ethereum contracts, view ABI/bytecode, AI security analysis

Wallet Audit ($0.15): Comprehensive security analysis, transaction patterns, risk scoring

Wallet Reputation ($0.10): Reputation scoring (0-100), activity metrics, ENS resolution

WHY THIS MATTERS

Lowering Web3 Barriers:

• Simplified UX (no gas fee understanding needed)

• Predictable costs ("$0.05" vs "0.002 ETH + gas")

• No commitment (try once, pay once)

• Full transparency (every charge visible on-chain)

Sustainable Model:

• Fair pricing (pay for value, not time)

• Scalable (more usage = more revenue)

• Lower churn (no lock-in)

CURRENT DEPLOYMENT

Live on Sepolia Testnet:

• Contract: 0x6B3c3435DfC8dE86018dC311915E8D7af826c3Fa

• Total Users: 2 | Active Permissions: 2

• Total Revenue: $3.70 USDC | Total Executions: 25

• Envio Status: Fully synced | Latency: 2-3 seconds

TRY IT

Prerequisites: MetaMask Flask, Sepolia ETH & USDC

Steps:

1. npm run dev → http://localhost:3000

2. Connect wallet → Grant $10 permission

3. Use services: Contract Inspector ($0.05), Wallet Audit ($0.15), Reputation ($0.10)

4. Watch dashboard update in real-time!

ROADMAP

Phase 1 (Current): ERC-7715, 3 services, Envio indexing, gasless transactions

Phase 2 (Q1 2026): Mainnet, more services, mobile-responsive, multi-chain

Phase 3 (Q2 2026): Custom permissions, team accounts, API access, ML analytics

CONCLUSION

PermiPay combines ERC-7715 (one-time permissions), ERC-4337 (gasless), Envio (real-time), and pay-per-use pricing to create an experience that's:

Simpler • Cheaper • Transparent • Flexible

No more subscription fatigue. No more gas fee anxiety. Just use what you need, when you need it.

Built with love using Next.js, Envio, and ERC-7715

GitHub: https://github.com/Rohitamalraj/PermiPay

Live demo: https://permipay.vercel.app/