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| -rw-r--r-- | docs/types.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/types.rst b/docs/types.rst index 566c4c19..fbc83972 100644 --- a/docs/types.rst +++ b/docs/types.rst @@ -104,6 +104,14 @@ Operators: * ``<=``, ``<``, ``==``, ``!=``, ``>=`` and ``>`` +.. warning:: + If you convert a type that uses a larger byte size to an ``address``, for example ``bytes32``, then the ``address`` is truncated. + To reduce conversion ambiguity version 0.4.24 and higher of the compiler force you make the truncation explicit in the conversion. + Take for example the address ``0x111122223333444455556666777788889999AAAABBBBCCCCDDDDEEEEFFFFCCCC``. + + You can use ``address(uint160(bytes20(b)))``, which results in ``0x111122223333444455556666777788889999aAaa``, + or you can use ``address(uint160(uint256(b)))``, which results in ``0x777788889999AaAAbBbbCcccddDdeeeEfFFfCcCc``. + .. note:: Starting with version 0.5.0 contracts do not derive from the address type, but can still be explicitly converted to address. |