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Fix documentation example.

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chriseth 2020-06-10 11:24:35 +02:00
parent d2e9b4e946
commit 3d115a28fd
1 changed files with 7 additions and 1 deletions
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8
docs/types/reference-types.rst
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@ -430,7 +430,13 @@ Array slices are useful to ABI-decode secondary data passed in function paramete
/// Forward call to "setOwner(address)" that is implemented by client
/// after doing basic validation on the address argument.
function forward(bytes calldata _payload) external {
bytes4 sig = abi.decode(_payload[:4], (bytes4));
// Since ABI decoding requires padded data, we cannot
// use abi.decode(_payload[:4], (bytes4)).
bytes4 sig =
_payload[0] |
(bytes4(_payload[1]) >> 8) |
(bytes4(_payload[2]) >> 16) |
(bytes4(_payload[3]) >> 24);
if (sig == bytes4(keccak256("setOwner(address)"))) {
address owner = abi.decode(_payload[4:], (address));
require(owner != address(0), "Address of owner cannot be zero.");