feat: enable EIP-7702 gasless transactions with Pimlico integration #2821
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- Add PimlicoPaymasterService for gas price estimation via Pimlico API - Enable isDelegationSupported() when Pimlico is configured - Activate EIP-7702 flow in sell.service.ts and swap.service.ts - Use Pimlico gas prices in transferTokenWithUserDelegation - Add PIMLICO_API_KEY configuration Supported chains: Ethereum, Arbitrum, Optimism, Polygon, Base, BSC, Gnosis, Sepolia The flow: 1. Backend checks if user has zero native balance 2. If yes, provides EIP-7702 delegation data in depositTx 3. Frontend signs delegation (EIP-712) + authorization (EIP-7702) 4. Backend executes via relayer with Pimlico-optimized gas prices
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- Add tests for getGasPrice(), sponsorTransaction(), checkSponsorshipEligibility() - Add tests for hasZeroNativeBalance(), transferTokenWithUserDelegation() - Cover error handling, fallback behavior, and edge cases
- Add tests for isDelegationSupportedForRealUnit() (6 tests) - Add tests for prepareDelegationDataForRealUnit() (8 tests) - Add tests for transferTokenWithUserDelegationForRealUnit() (10 tests) - Cover Base-only support, error handling, and edge cases
Comprehensive E2E test covering 5 phases: 1. Contract verification (DelegationManager, Delegator deployed) 2. Backend delegation data preparation 3. Frontend user signing simulation (EIP-712 + eth_sign) 4. Backend processing (handleEip7702Input equivalent) 5. Real transaction execution (optional, requires funded relayer) Run with: SEPOLIA_RPC_URL=https://... npm test -- --testPathPattern="eip7702-e2e"
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Closing this PR as it has been superseded by #2822. Reason: This PR still requires Alternative: PR #2822 uses EIP-5792 The relevant config changes (PIMLICO_API_KEY) have been incorporated into #2822. |
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Summary
isDelegationSupported()when Pimlico is configuredtransferTokenWithUserDelegationPIMLICO_API_KEYconfigurationSupported chains: Ethereum, Arbitrum, Optimism, Polygon, Base, BSC, Gnosis, Sepolia
Flow
depositTxConfiguration
Test plan