Vitalik Buterin cites Argent Wallet as an example of a smart contract-based social recovery implementation

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Buterin has previously given Argent Wallet as an example of a social recovery implementation. Argent is a smart contract wallet that holds funds. The user can set up the parameters of the smart contract, including the guardians and recovery tools. This approach can release funds when certain conditions are met but is also open to smart contract exploits.