Add support for TFHE.decrypt() #89
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The decrypt() function decrypts the given euint value. There are a few considerations when doing decryption: * if a transaction is reverted due to a failed TFHE.optimisticReq(), then any decryptions would leak information as they would already have been decrypted when the txn is reverted at the end (due to the nature of TFHE.optimistiReq()) * gas estimation might be more imprecise, because control flow can now depend on decrypted values (that gas estimation doesn't know of as it always uses 0)
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The decrypt() function decrypts the given euint value. There are a few
considerations when doing decryption:
then any decryptions would leak information as they would already
have been decrypted when the txn is reverted at the end (due to the
nature of TFHE.optimistiReq())
depend on decrypted values (that gas estimation doesn't know of as it
always uses 0)