base-erc4337-paymaster-sponsorship
Skill0 starsChanged 46 days agoMITView on GitHub
Implementing gasless RING transfer on Base smart accounts.
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The file
Files
Base ERC-4337 Paymaster Gas Sponsorship
Summary
ERC-4337 Paymasters sponsor gas only for smart accounts — plain EOAs cannot use CDP Paymaster without upgrade. Ring allowlists RING mirror transfer and RingSales desk selectors in CDP portal — deny by default. CDP_PAYMASTER_URL is server-only; Next.js API route proxies with Auth.js session check and rate limits. Base fees are sub-cent but sponsorship removes ETH onboarding friction for US Coinbase funnel users.
Instructions
- useSendUserOperation({ paymaster: true }) with CDP provider.
- wallet_sendCalls with capabilities.paymasterService.url → server proxy.
- CDP portal: allowlist RING.transfer, RingSales.buy/sell selectors.
- POST /api/base/paymaster proxy: session + rate limit + CDP forward.
- Handle paymaster limit exceeded → user-friendly fallback message.
- Base Sepolia for integration tests before mainnet allowlist.
Deeper fields
jq -r '.mission, .expertise, .keywords' "mcp/AI-LEGIOX/legiox-truth-lens/base-erc4337-paymaster-sponsorship.nodus.json"
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