Storage keys and values are big endian. Keeping them LE was a pre-mature
optimization because for the contract itself it this is a no-op and thus
not observable. However we should consider the storage layout as part of
the contract ABI. The endianness of transient storage values are still
kept as-is.
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Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
xermicus