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Merge pull request #5004 from ethereum/solidity_types_abi

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Note how Solidity types map to ABI types
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chriseth 2018-09-19 14:42:39 +02:00 committed by GitHub
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docs/abi-spec.rst
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@ -81,6 +81,24 @@ It is possible to form tuples of tuples, arrays of tuples and so on. It is also
.. note:: .. note::
Solidity supports all the types presented above with the same names with the exception of tuples. The ABI tuple type is utilised for encoding Solidity ``structs``. Solidity supports all the types presented above with the same names with the exception of tuples. The ABI tuple type is utilised for encoding Solidity ``structs``.
Mapping Solidity to ABI types
-----------------------------
The following table shows on the left column Solidity types that are not part of the ABI,
and on the right column the ABI type that they map to.
+-------------------------------+-----------------------------------------------------------------------------+
| Solidity | ABI |
+===============================+=============================================================================+
|:ref:`address payable<address>`|``address`` |
+-------------------------------+-----------------------------------------------------------------------------+
|:ref:`contract<contracts>` |``address`` |
+-------------------------------+-----------------------------------------------------------------------------+
|:ref:`enum<enums>` |smallest ``uint`` type that is large enough to hold all values |
| | |
| |For example, an ``enum`` of 255 values or less is mapped to ``uint8`` and |
| |an ``enum`` of 256 values is mapped to ``uint16``. |
+-------------------------------+-----------------------------------------------------------------------------+
Formal Specification of the Encoding Formal Specification of the Encoding
==================================== ====================================