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I am writing a smart contract which allows the delegate to be changed. I also want incoming payments to be permissioned. Ideally, I want to update the incoming payment whitelist with the baker's address at the same time the delegate is changed. But changing the delegate requires a TKeyHash while sp.sender is of type TAddress.

How can I compare, or convert, a TKeyHash to TAddress and the reverse?

I have tried casting with sp.address(baker_key_hash) or sp.key_hash(baker_address) but that gives an error.

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You can convert a key_hash to a contract and then a contract to an address.

sp.to_address(sp.implicit_account(my_key_hash))

Relevant documentation:

https://smartpy.io/docs/types/contracts_addresses#cast-key_hash-to-a-typed-contract

https://smartpy.io/docs/types/contracts_addresses#convert-contract-to-address

Converting from an address to a key_hash is not possible. For an example why, a KT1... address does not have a corresponding key_hash.

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  • Thank you. But that only answers half the question. What about the reverse? Is there a way to convert from TAddress to TKeyHash? Dec 8, 2021 at 6:58
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    @BakeꜩforMe, no. Remark that it wouldn’t be sound, KT1… addresses don’t correspond to key hashes.
    – FFF
    Dec 8, 2021 at 9:25

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