-**Permissionless and Censorship-Resistant Design**: Ethereum values permissionless participation. A delegation contract MUST NOT hard-code or rely on any single “trusted” relayer or service. This would brick the account if the relayer goes offline. Features like batching (e.g. approve+transferFrom) can by used by the EOA itself without a relayer. For application developers that want to use advanced features enabled by 7702 (Gas Abstraction, Privacy-Preserving Withdrawals) you’ll need a relayer. While there are different relayer architectures, our recommendation is to use [4337 bundlers](https://www.erc4337.io/bundlers) pointing at least [entry point 0.8](https://github.com/eth-infinitism/account-abstraction/releases/tag/v0.8.0) because:
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