Nexus employs EIP-4337 for its suite of contracts designed for Modular Smart Accounts compliant with ERC-7579 and ERC-4337. EIP-4337 is an account abstraction proposal that avoids the need for consensus-layer protocol changes. However, this EIP is still in draft status and not finalized, making it unsuitable for general use.
On the EIP-4337 page, hovering over the draft status reveals: "This EIP is not yet recommended for general use or implementation, as it is subject to normative (breaking) changes."
If usage of EIP-4337 is desired, it is recommended to perform high-level security controls such as formal verification to ensure security and stability.
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