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Nibbles are not bytes, duh

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William Entriken 2018-02-21 13:44:16 -05:00 committed by GitHub
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EIPS/eip-165.md
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@ -86,9 +86,9 @@ Implementation note, there are several logical ways to implement this function.
### How to Detect if a Contract Implements ERC-165
1. The source contact makes a `STATICCALL` to the destination address with input data: `0x01ffc9a701ffc9a7000000000000000000000000` and gas 30,000. This corresponds to `contract.supportsInterface(0x01ffc9a7)`.
1. The source contact makes a `STATICCALL` to the destination address with input data: `0x01ffc9a701ffc9a700000000000000000000000000000000000000000000000000000000` and gas 30,000. This corresponds to `contract.supportsInterface(0x01ffc9a7)`.
2. If the call fails or return false, the destination contract does not implement ERC-165.
3. If the call returns true, a second call is made with input data `0x01ffc9a7ffffffff000000000000000000000000`.
3. If the call returns true, a second call is made with input data `0x01ffc9a7ffffffff00000000000000000000000000000000000000000000000000000000`.
4. If the second call fails or returns true, the destination contract does not implement ERC-165.
5. Otherwise it implements ERC-165.