RIP-7712: Multi-dimensional 256-bit nonce for RIP-7560 Account Abstraction transactions

The original RIP-7560 previously required a creation of a NonceManager contract and an introduction of a 256-bit wide two-dimensional nonce parameter. This closely reflects the implementation of “nonce” replay protection in ERC-4337.

However, this requirement seemed to complicate an already complex design while not being strictly necessary to achieve most of the goals set forward by RIP-7560, so this feature has been extracted into a separate document here:

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