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/07/07 · EtherScan ERC20 token search: wahre-wahrheit.de; The HumanStandardToken: a specialisation of ERC20 that provides a name, decimals, symbol and version as public variables, so these can be read from the contract and do not need to be configured: wahre-wahrheit.de /02/09 · What is the ERC Ethereum Token Standard? The ERC Ethereum token standard is a blueprint for creating fungible tokens that are compatible with the broader Ethereum network. ERC20 is the Ethereum token standard which is used for Ethereum smart contracts. Developed in , ERC defines a common list of rules that an Ethereum token has to implement. Giving developers the ability to program how new tokens will function within the Ethereum ecosystem. This token protocol became popular with crowdfunding companies via. Ethereum is a global, decentralized platform for money and new kinds of applications. On Ethereum, you can write code that controls money, and build applications accessible anywhere in the world. Ajude a traduzir esta página. Está a ver esta página em inglês porque ainda não a traduzimos. Ajude-nos a traduzir este conteúdo.

Tokens can represent virtually anything in Ethereum:. Such a powerful feature of Ethereum must be handled by a robust standard, right? That’s exactly where the ERC plays its role! This standard allows developers to build token applications that are interoperable with other products and services. The ERC introduces a standard for Fungible Tokens, in other words, they have a property that makes each Token be exactly the same in type and value of another Token.

For example, an ERC Token acts just like the ETH, meaning that 1 Token is and will always be equal to all the other Tokens. The ERC Ethereum Request for Comments 20 , proposed by Fabian Vogelsteller in November , is a Token Standard that implements an API for tokens within Smart Contracts. It provides functionalities like to transfer tokens from one account to another, to get the current token balance of an account and also the total supply of the token available on the network.

Besides these it also has some other functionalities like to approve that an amount of token from an account can be spent by a third party account. If a Smart Contract implements the following methods and events it can be called an ERC Token Contract and, once deployed, it will be responsible to keep track of the created tokens on Ethereum.

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The ERC Ethereum token standard is a blueprint for creating fungible tokens that are compatible with the broader Ethereum network. The ERC standard has seeped into almost every corner of the crypto ecosystem. A large number of popular tokens, such as the stablecoin tether and leading oracle service Chainlink, are actually ERC tokens under the hood. ERC tokens are digital assets that can be created by anyone but are mostly made by organizations and tech-focused companies.

Each token has its own specific utility, such as granting users the right to vote on decisions impacting the future of a project, or rewarding customers for performing certain tasks. ERC tokens are typically sold via a variety of different offerings as a way to raise early-stage capital for the underlying project. In the past, however, critics have argued that crypto tokens have drawn too much hype, becoming a vehicle for sour investments or straight-up scams.

Many of the projects that raised money in the initial coin offering boom of reportedly failed to provide any returns for their investors. ERC standardizes the core functionality of each token, meaning that all tokens created using this framework are interoperable with each other as well as all ERC compatible services like MyEtherWallet and MetaMask. To understand how this is useful, here are some of the problems token creators encounter when they build projects from scratch:.

Every ERC has several required features for developers to implement. The main elements include:. More granular details can be found at Ethhub.

ethereum erc20 token standard

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Help us translate the latest version. One of the many Ethereum development standards focus on token interfaces. These standards help ensure smart contracts remain composable, so for instance when a new project issues a token, that it remains compatible with existing decentralized exchanges. Here are some of the most popular token standards on Ethereum:. Know of a community resource that helped you? Edit this page and add it! If you’re an expert on the topic and want to contribute, edit this page and sprinkle it with your wisdom.

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ethereum erc20 token standard

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Skip to content. Code Issues Pull requests Actions Projects Security Insights. Permalink master. Branches Tags. Could not load branches. Could not load tags. Go to file T Go to line L Copy path Copy permalink. MicahZoltu Adds rule to EIP-1 that references to other EIPs must use relative pa…. Latest commit 15f61ed Sep 29, History.

In some cases, people were using markdown citations, I suspect because the long-form was a bit verbose to inline. Since the relative path is quite short, I moved these to inline but I wouldn’t be opposed to putting them back to citation format if that is desired by the authors. In these cases I tried to excise the reference from the EIP as best I could. It is worth noting that the Readme actually already had this rule, it just wasn’t expressed properly in EIP-1 and the „Citation Format“ section of the readme I think caused people a bit of confusion when citing externally, you should use the citation format.

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ERC20 allows the implementation of a standard API to ensure the interoperability between tokens. It offers basic functionalities to transfer tokens, obtain account balances, get the total supply of tokens, and allow token approvals. ERC20 defines two types of events, Transfer , triggered when tokens are transferred and Approve , used for every successful call of the approve method.

This token may also include functions such as allowance , approve , and transferFrom to offer advanced functionalities and authorize some other Ethereum address to utilise your tokens on your behalf. This other Ethereum address could be a smart contract designed to handle tokens or just another account. Home Ethereum Basics Ethereum Roadmap Using Ethereum Ethereum Ecosystem Guides Ethereum FAQ Other Glossary Languages. Table of contents Summary Resources.

You can chose from 0 to 18 decimal values ERC20 defines two types of events, Transfer , triggered when tokens are transferred and Approve , used for every successful call of the approve method. Resources Github Wiki.

ethereum erc20 token standard

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. The following describes standard functions a token contract can implement. This ERC describes a simpler version of the ERC20 standard token contract , removing transfer approvals. Some dapps need interfaces simpler than ERC20 as a base for their tokens.

We’ve seen some projects take this approach already 1. The main problems with ERC20 standard token are:. The text was updated successfully, but these errors were encountered:. Implementing totalSupply as a variable instead of a function still seems like a bad idea to me: it exposes implementation details, and provides very little reduction in complexity. Arachnid Note public keyword actually does generate a function, it’s just syntactic sugar to generate a getter.

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The following standard allows for the implementation of a standard 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. A standard interface allows any tokens on Ethereum to be re-used by other applications: from wallets to decentralized exchanges.

Returns the name of the token – e. OPTIONAL – This method can be used to improve usability, but interfaces and other contracts MUST NOT expect these values to be present. Returns the number of decimals the token uses – e. Note Transfers of 0 values MUST be treated as normal transfers and fire the Transfer event. The transferFrom method is used for a withdraw workflow, allowing contracts to transfer tokens on your behalf.

NOTE : To prevent attack vectors like the one described here and discussed here , clients SHOULD make sure to create user interfaces in such a way that they set the allowance first to 0 before setting it to another value for the same spender. There are already plenty of ERCcompliant tokens deployed on the Ethereum network. Different implementations have been written by various teams that have different trade-offs: from gas saving to improved security.

Copyright and related rights waived via CC0. Fabian Vogelsteller , Vitalik Buterin , „EIP ERC Token Standard,“ Ethereum Improvement Proposals , no. EIP ERC Token Standard Source Author Fabian Vogelsteller , Vitalik Buterin Status Final Type Standards Track Category ERC Created Table of Contents Simple Summary Abstract Motivation Specification Token Methods Events Implementation History Copyright.

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Ethereum is a global, decentralized platform for money and new kinds of applications. On Ethereum, you can write code that controls money, and build applications accessible anywhere in the world. Giúp dịch trang này. Bạn đang xem trang này bằng tiếng Anh vì chúng tôi chưa dịch trang này. Giúp chúng tôi dịch nội dung này. Ethereum is a global, decentralized platform for money and new kinds of applications. On Ethereum, you can write code that controls money, and build applications accessible anywhere in the world. Help deze pagina te vertalen. Je bekijkt deze pagina in het Engels omdat we hem nog niet hebben vertaald. Help ons deze inhoud te vertalen.

Tokens can represent virtually anything in Ethereum:. Such a powerful feature of Ethereum must be handled by a robust standard, right? That’s exactly where the ERC plays its role! This standards allows developers to build token applications that are interoperable with other products and services. The ERC introduces a standard for Fungible Tokens, in other words, they have a property that makes each Token be exactly the same in type and value of another Token.

For example, an ERC Token acts just like the ETH, meaning that 1 Token is and will always be equal to all the other Tokens. The ERC Ethereum Request for Comments 20 , proposed by Fabian Vogelsteller in November , is a Token Standard that implements an API for tokens within Smart Contracts. It provides functionalities like to transfer tokens from one account to another, to get the current token balance of an account and also the total supply of the token available on the network.

Besides these it also has some other functionalities like to approve that an amount of token from an account can be spent by a third party account. If a Smart Contract implements the following methods and events it can be called an ERC Token Contract and, once deployed, it will be responsible to keep track of the created tokens on Ethereum. From EIP :. Let’s see how a Standard is so important to make things simple for us to inspect any ERC Token Contract on Ethereum.

We just need the Contract Application Binary Interface ABI to create an interface to any ERC Token. As you can see below we will use a simplified ABI, to make it a low friction example.

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