==== EIP 20: ERC-20 Token Standard  ====
[[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.

=== Overview ===
  ://It is the most common and well-known standard within all crypto community. 99% (if not all) issued [[dido:public:ra:xapend:xapend.a_glossary:i:ico]] [[dido:public:ra:xapend:xapend.a_glossary:t:tokens|tokens]] on top of the Ethereum implements this standard. The [[dido:public:ra:xapend:xapend.a_glossary:k:key|key]] benefit we get here is that any [[dido:public:ra:xapend:xapend.a_glossary:a:application|application]] or other smart contracts can interact with a token in a standard manner without a need of knowing other details about the token. Therefore, we have a very pleasant way to create any ICO token and have a standard way to interact with all of them like they are all the same. For instance, crypto [[dido:public:ra:xapend:xapend.a_glossary:w:wallet|wallet]] developers can avoid custom development and integrations to add new tokens. All they need to know is the Ethereum Token address that implements the standard.//
    : Source: [[https://hackernoon.com/5-erc-standards-every-ethereum-developer-should-know-about-c1ea79d3483e]]

<table>
<caption>Data sheet for ERC-20 Token Standard </caption>
| Title                      | ERC-20 Token Standard  |
| Author                     | Fabian Vogelsteller, Vitalik Buterin |
| Status                     | Final |
| Created                    | 2015-11-19  |
| Description                | [[http://eips.ethereum.org/EIPS/eip-20]] |
| Specification              | [[http://eips.ethereum.org/EIPS/eip-20#specification]] |
| Category                   | ERC |
</table>

=== Abstract ===
The following standard allows for the implementation of a standard [[dido:public:ra:xapend:xapend.a_glossary:a:api|API]] for tokens within smart contracts. This standard provides basic functionality to transfer tokens, as well as allow tokens to be approved so they can be spent by another on-chain third party.