==== EIP 165: ERC-165 Standard Interface Detection  ====
[[dido:public:ra:xapend:xapend.b_stds:defact:ethereum:eip| Return to Ethereum ERCs ]]

  : **Note**: The following is an excerpt from the official Ethereum site. It is provided here as a convenience and is not authoritative. Refer to the original document as the authoritative reference.

<table>
<caption>Data sheet for Standard Interface Detection</caption>
| Title                      | Standard Interface Detection |
| Author                     | Christian Reitwießner, Nick Johnson, Fabian Vogelsteller, Jordi Baylina, Konrad Feldmeier, William Entriken |
| Status                     | Final |
| Created                    | 2018-01-23  |
| Description                | [[http://eips.ethereum.org/EIPS/eip-165]] |
| Specification              | [[http://eips.ethereum.org/EIPS/eip-165#Specification]] |
| Category                   | ERC |
| Requires                   | [[dido:public:ra:xapend:xapend.b_stds:defact:ethereum:eip:erc_0214|EIP 214 ]] |
</table>

=== Simple Summary === 
: //Creates a standard method to publish and detect what interfaces a [[dido:public:ra:xapend:xapend.a_glossary:s:smart_contract|smart contract]] implements.//

=== Abstract === 
  ://Herein, we standardize the following://
       ://1. How interfaces are identified//
       ://2. How a contract will publish the interfaces it implements//
       ://3. How to detect if a contract implements ERC-165//
       ://4. How to detect if a contract implements any given interface//

=== Motivation === 
  : // For some “standard interfaces” like the [[dido:public:ra:xapend:xapend.b_stds:defact:ethereum:eip:erc_0020| ERC-20]] token interface, it is sometimes useful to query whether a contract supports the interface and if yes, which version of the interface, in order to adapt the way in which the contract is to be interacted with. Specifically for ERC-20, a version [[dido:public:ra:xapend:xapend.a_glossary:i:id|identifier]] has already been proposed. This proposal standardizes the concept of interfaces and standardizes the identification (naming) of interfaces.//