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AA-306: Add warning on changed expectations for 7712 and 7702 combination #39

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AA-306: Add warning on changed expectations for 7712 and 7702 combination #39

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10 changes: 10 additions & 0 deletions RIPS/rip-7712.md
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Expand Up @@ -128,6 +128,16 @@ Smart Contract Accounts could access the `uint256 nonce` value in the `Transacti
higher 192 bits assuming nonce cannot exceed 64 bits.
This assumption is wrong and is broken by the proposed change.

### EIP-7702 authorization revocation with a nonce bump

In EIP-7702 the EOA is able to revoke an "authorization tuple" it has previously signed as long as it has not been
included on-chain.
This can be done by incrementing the EOAs `nonce`, which in turn can only be done by sending a new transaction.
With RIP-7712, however, there exists a new way of sending a transaction without affecting the legacy `nonce` field.
Such a transaction will not invalidate the previously signed "authorization tuple" either.
Users who are unaware of this change may not expect an "authorization tuple" to remain valid after sending a different
transaction and should be aware of the existence of RIP-7712 and multidimensional nonces.

## Security Considerations

Smart Contract Accounts that need to enforce the sequence of transaction execution must apply appropriate restrictions
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