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Without this change, in a world with multiple rollups, a simple user to user token transfer requires the user to know both the destination address and the destination chain name. Ethereum has an built in way to validate that addresses are indeed valid addresses, and not just any random string of bits. Thank goodness applications like Metamask use checksums by default. Solidity type-checks addresses to verify that they are in range, and byte-packs addresses to save storage space. And why start at version 1?
