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Check Nonce of messages received by relayer #1834

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MitchTurner opened this issue Apr 17, 2024 · 0 comments

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MitchTurner commented Apr 17, 2024

Our code assumes that each message received by the relayer has a unique nonce, but doesn't check that this is true.

A collision could be very bad because it would override the previous message.

For now, maybe we halt the relayer if this occurs? We could also handle specific cases, like if the old message has already been spent?

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