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Gas Sponsorship

Volr SDK supports gas sponsorship through Account Abstraction, allowing you to pay gas fees for your users.

What is Gas Sponsorship?​

Gas sponsorship means you (the developer) pay the gas fees for user transactions instead of requiring users to hold native tokens (ETH, MATIC, etc.).

Benefits​

  • Better UX: Users don't need to hold native tokens
  • Lower barrier: Users can pay with any supported token
  • Seamless experience: Transactions just work without extra steps

How It Works​

[User initiates payment]
    ↓
[Transaction created]
    ↓
[Gas fee calculated]
    ↓
[Gas sponsored by developer]
    ↓
[Transaction executed]
    ↓
[User pays only the payment amount]

Enabling Gas Sponsorship​

Gas sponsorship is configured in your Volr Dashboard:

  1. Go to Settings > Gas Sponsorship
  2. Enable gas sponsorship for your project
  3. Configure sponsorship settings:
    • Maximum gas per transaction
    • Daily gas limit
    • Allowed chains

Account Abstraction​

Volr SDK uses Account Abstraction (EIP-4337 / EIP-7702) to enable gas sponsorship:

  • Smart Contract Wallets: Each user has a smart contract wallet
  • Paymaster: Volr acts as paymaster to sponsor gas
  • Seamless: Users don't need to know about gas sponsorship

Gas Sponsorship Status​

Check if gas sponsorship is enabled:

import { useVolr } from '@volr/react';

function GasSponsorshipStatus() {
  const { config } = useVolr();

  // Gas sponsorship is handled automatically
  // Users don't need to do anything special
  return (
    <div>
      Gas sponsorship is enabled automatically
    </div>
  );
}

Monitoring Gas Usage​

Monitor gas usage in your Dashboard:

  1. Go to Analytics > Gas Usage
  2. View gas usage metrics:
    • Total gas sponsored
    • Average gas per transaction
    • Daily gas costs

Gas Limits​

Configure gas limits to control costs:

Per Transaction Limit​

Set maximum gas per transaction:

Max Gas per Transaction: 100,000 gas

Daily Limit​

Set daily gas sponsorship limit:

Daily Gas Limit: 1,000,000 gas

Chain Limits​

Set limits per chain:

Base: 500,000 gas/day
Polygon: 500,000 gas/day

Best Practices​

1. Set Reasonable Limits​

Set gas limits based on your use case:

// For small payments
Max Gas per Transaction: 50,000

// For complex transactions
Max Gas per Transaction: 200,000

2. Monitor Usage​

Regularly check gas usage:

  • Review daily gas costs
  • Identify high-gas transactions
  • Optimize if needed

3. Use Appropriate Chains​

Choose chains with lower gas costs:

  • Base: Low gas costs, good for high-volume
  • Polygon: Very low gas costs
  • Arbitrum: Low gas costs, good performance

Gas Sponsorship vs User Pays​

  • ✅ Better UX
  • ✅ Lower barrier to entry
  • ✅ Users pay only the payment amount
  • ❌ You pay gas fees

User Pays Gas​

  • ✅ You don't pay gas fees
  • ❌ Users need native tokens
  • ❌ More complex UX
  • ❌ Higher barrier to entry

Troubleshooting​

Transaction Fails Due to Gas​

If transaction fails due to gas:

  1. Check gas limits in Dashboard
  2. Increase gas limit if needed
  3. Check daily limit hasn't been reached

High Gas Costs​

If gas costs are high:

  1. Review transaction types
  2. Optimize smart contract calls
  3. Consider using lower-cost chains

Next Steps​