[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"blog-article-en-erc-20-tokens-understanding-their-role-and-functionality-in-ethereum":3},{"post":4,"related_posts":164},{"id":5,"slug":6,"title":7,"title_html":7,"content":8,"content_html":9,"excerpt":10,"excerpt_html":11,"link":12,"date":13,"author":14,"author_slug":15,"author_link":16,"featured_image":17,"lang":18,"faq":19,"yoast_head_json":36,"tags":139,"translation_slugs":160},48146,"erc-20-tokens-understanding-their-role-and-functionality-in-ethereum","ERC-20 Tokens: Understanding Their Role and Functionality in Ethereum","What are ERC-20 tokens?History and Development of the ERC-20 StandardTechnical Features of ERC-20 TokensAdvantages of Using ERC-20 TokensLimitations and Issues of ERC-20 TokensConclusion\nERC-20 tokens are the foundation of the Ethereum ecosystem. They allow for the creation of cryptocurrencies and decentralized applications that operate under a unified set of rules. This standard simplifies life for developers and users alike. In this article, we will thoroughly examine how these tokens work, their history, advantages, and limitations.\nWhat are ERC-20 tokens?\nERC-20 tokens are a standard created for the Ethereum network that functions as a universal language for interacting with all applications within the blockchain. Thanks to this standard, developers can easily create tokens, and users can utilize them in various applications, such as DeFi or NFTs.\nHow do ERC-20 tokens work?\nERC-20 defines a set of rules for creating and operating tokens. This simplifies their use in any applications compatible with Ethereum. For example, DeFi platforms accept tokens from different developers, as they all follow the same standard.\nUsage example: you can send a token, and the smart contract automatically checks your balance and transfers the asset to the new owner.\nWhere is the ERC-20 standard used?\nICOs (Initial Coin Offerings): most tokens created to attract investments follow this standard.\nNFTs (non-fungible tokens): although NFTs use a different standard (for instance, ERC-721), many auxiliary tokens for managing NFTs are built on the ERC-20.\nWallets: ERC-20 tokens are supported by popular wallets like MetaMask, Trust Wallet, and others, making them convenient for users.\nWhy is ERC-20 popular?\n\nDevelopers know how to create tokens, and users can easily manage them.\nThe standard is based on smart contracts that operate automatically, reducing errors and minimizing human influence.\nERC-20 tokens are applicable in various fields—from decentralized finance to blockchain gaming.\n\nHistory and Development of the ERC-20 Standard\nERC-20 was proposed in 2015 by Vitalik Buterin and the Ethereum team. The main goal of creating the standard was to simplify the process of token development and their integration into the Ethereum ecosystem.\nWhy did ERC-20 become important? Before its introduction, each token was created with unique rules, leading to confusion and difficulties in usage. ERC-20 addressed this problem by providing a unified set of rules that simplifies interaction between tokens and applications.\nToday&#8217;s role of ERC-20:\n\nThe standard is used by millions of users.\nMost crypto projects, including DeFi, ICOs, and auxiliary tokens for NFTs, are based on ERC-20.\nThis standard has become the foundation of the Ethereum ecosystem.\n\nTechnical Features of ERC-20 Tokens\nThe ERC-20 standard is a set of rules that define how tokens interact with each other and with applications on the Ethereum blockchain. Tokens are created using mandatory and optional methods, which makes them versatile and easily integrable into the ecosystem.\nExample Methods of the ERC-20 Standard\n\n\n\nMethod\nRequired\nDescription\n\n\nname\nNo\nThe name of the token, e.g., &quot;Tether USD&quot;.\n\n\nsymbol\nNo\nThe token&#8217;s shorthand, e.g., USDT.\n\n\ndecimals\nNo\nThe number of decimal places.\n\n\ntransfer\nYes\nTransfer tokens from one user to another.\n\n\napprove\nYes\nAuthorization for a third party to use tokens.\n\n\n\nWhy is Testing Contracts Important?\nSmart contracts on which ERC-20 tokens operate require thorough verification before launch, as errors can lead to financial losses.\nExample of an error: if the transfer method is incorrectly configured, tokens can be locked in the contract or sent to the wrong address.\n\nBenefits of Testing:\n\nReduction of token loss risks.\nIncreased user trust.\nProtection against vulnerabilities and hacker attacks.\n\nCore Functions of the ERC-20 Standard\n\n\n\nFunction\nDescription\nUsage Example\n\n\ntransfer\nTransfer tokens between users.\nA user sends tokens to a friend. The smart contract checks the balance and executes the operation.\n\n\napprove\nGrant permission to another address to use your tokens.\nA user authorizes a dApp to use 50 tokens for exchange.\n\n\nallowance\nCheck how many tokens are available for use by another address.\nThe application checks the available balance before performing the operation.\n\n\nbalanceOf\nCheck the current balance of tokens with the user.\nThe application shows the balance of tokens owned by a specific address.\n\n\n\nMandatory and Optional Methods\n\nMandatory Methods: these are minimum requirements without which the token will not function. For instance, transfer and approve are necessary for basic operations.\nOptional Methods: they improve user experience. For example, name allows displaying the token&#8217;s name in applications. Symbol simplifies token identification. Decimals indicates how many digits are used for fractional parts of the token.\n\nExample Interaction with ERC-20 Tokens\n\nA user sends a token to a friend using the transfer method.\nThe smart contract checks the balance of the sender using the balanceOf method.\nAfter successful verification, the token is credited to the recipient.\n\n\nAdvantages of Using ERC-20 Tokens\nERC-20 standard tokens have several advantages that make them the foundation of the Ethereum ecosystem. Let&#8217;s explore them in detail.\n&nbsp;\n\n\n\nAdvantage\nDescription\nUsage Example\n\n\nCompatibility\nThey work with all Ethereum wallets and applications.\nThe USDT token (ERC-20 standard) is used on exchanges like Binance, Coinbase, and in wallets like MetaMask and Trust Wallet.\n\n\nSimplicity\nEasy to create a new token with minimal coding knowledge.\nStartups create their tokens in just a few days for ICOs or internal operations.\n\n\nIntegration\nSuitable for DeFi, NFTs, ICOs, and other Ethereum applications.\nIn DeFi, tokens such as UNI and AAVE are actively traded and used for project governance.\n\n\nFlexibility\nUniversal methods for working with tokens: transferring, checking balances.\nERC-20 methods like transfer and balanceOf ensure ease of interaction.\n\n\nTransparency\nAll operations with tokens can be verified on the blockchain.\nAny user can check the history of transactions of a token via Etherscan.\n\n\nTime Savings\nUsing a ready-made standard instead of developing tokens from scratch.\nDevelopers focus on the product rather than creating a complex token infrastructure.\n\n\nPopularity\nA recognized standard for most crypto projects, easily integrable.\nMost successful projects, such as Chainlink and MakerDAO, use ERC-20.\n\n\n\nDetails and Examples\n\nCompatibility: ERC-20 tokens can be used on any Ethereum platforms. This is particularly important for decentralized applications (dApps) that require interaction with different tokens.\nSimplicity: Creating tokens takes minimal time. For instance, startups launch their tokens to attract investments through ICOs or for loyalty programs.\nIntegration: ERC-20 tokens are used in DeFi protocols for lending and trading, as well as in the NFT ecosystem for auxiliary operations.\nTransparency: Blockchain allows for tracking token transactions, ensuring trust for users and investors.\n\nLimitations and Issues of ERC-20 Tokens\nDespite the popularity and versatility of the ERC-20 standard, it has its drawbacks, which affect the use of tokens in various projects.\n\n\n\nIssue\nDescription\nExample\n\n\nHigh Fees\nTransaction costs sharply increase during high load on the Ethereum network.\nDuring peak periods in 2024, transaction fees for token transfers reached $20 and above, making small transactions unprofitable.\n\n\nVulnerabilities\nErrors in smart contract code can lead to token loss.\nIn 2017, due to an error in the Parity contract, funds totaling millions of dollars were locked.\n\n\nScalability\nLimited throughput of the Ethereum network (~30 transactions per second).\nHeavy loads during times of NFT and DeFi popularity caused delays and high fees.\n\n\n\nDetails and Explanations\n\nHigh Fees. Ethereum uses a “gas fee” model that depends on the current load on the network. During periods of high activity, fees for simple ERC-20 transactions can be too expensive, especially for small transfers.\nVulnerabilities. ERC-20 smart contracts require thorough testing. Errors in the code can render tokens inaccessible or vulnerable to hackers. Projects that do not undergo audits often become targets for attacks, leading to loss of funds.\nScalability. The Ethereum network has a limited transaction processing speed (~30 TPS). With a high number of users, this leads to delays and increased fees.\n\nConclusion\nERC-20 is a key standard that has played an important role in the development of the crypto industry. It has significantly simplified the creation of tokens and their integration into the blockchain ecosystem. However, despite its popularity, the standard has its limitations, such as a lack of support for complex functions and interactions between tokens. These limitations encourage the emergence of new standards capable of expanding the capabilities of blockchains and tokens.\n&nbsp;","\u003Cdiv id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n\u003Cdiv class=\"ez-toc-title-container\">\n\u003Cspan class=\"ez-toc-title-toggle\">\u003C\u002Fspan>\u003C\u002Fdiv>\n\u003Cnav>\u003Cul class='ez-toc-list ez-toc-list-level-1 ' >\u003Cli class='ez-toc-page-1 ez-toc-heading-level-2'>\u003Ca class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\u002F\u002Fecos.am\u002Fen\u002Fblog\u002Ferc-20-tokens-understanding-their-role-and-functionality-in-ethereum#What_are_ERC-20_tokens\" >What are ERC-20 tokens?\u003C\u002Fa>\u003C\u002Fli>\u003Cli class='ez-toc-page-1 ez-toc-heading-level-2'>\u003Ca class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\u002F\u002Fecos.am\u002Fen\u002Fblog\u002Ferc-20-tokens-understanding-their-role-and-functionality-in-ethereum#History_and_Development_of_the_ERC-20_Standard\" >History and Development of the ERC-20 Standard\u003C\u002Fa>\u003C\u002Fli>\u003Cli class='ez-toc-page-1 ez-toc-heading-level-2'>\u003Ca class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\u002F\u002Fecos.am\u002Fen\u002Fblog\u002Ferc-20-tokens-understanding-their-role-and-functionality-in-ethereum#Technical_Features_of_ERC-20_Tokens\" >Technical Features of ERC-20 Tokens\u003C\u002Fa>\u003C\u002Fli>\u003Cli class='ez-toc-page-1 ez-toc-heading-level-2'>\u003Ca class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\u002F\u002Fecos.am\u002Fen\u002Fblog\u002Ferc-20-tokens-understanding-their-role-and-functionality-in-ethereum#Advantages_of_Using_ERC-20_Tokens\" >Advantages of Using ERC-20 Tokens\u003C\u002Fa>\u003C\u002Fli>\u003Cli class='ez-toc-page-1 ez-toc-heading-level-2'>\u003Ca class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\u002F\u002Fecos.am\u002Fen\u002Fblog\u002Ferc-20-tokens-understanding-their-role-and-functionality-in-ethereum#Limitations_and_Issues_of_ERC-20_Tokens\" >Limitations and Issues of ERC-20 Tokens\u003C\u002Fa>\u003C\u002Fli>\u003Cli class='ez-toc-page-1 ez-toc-heading-level-2'>\u003Ca class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\u002F\u002Fecos.am\u002Fen\u002Fblog\u002Ferc-20-tokens-understanding-their-role-and-functionality-in-ethereum#Conclusion\" >Conclusion\u003C\u002Fa>\u003C\u002Fli>\u003C\u002Ful>\u003C\u002Fnav>\u003C\u002Fdiv>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">ERC-20 tokens are the foundation of the Ethereum ecosystem. They allow for the creation of cryptocurrencies and decentralized applications that operate under a unified set of rules. This standard simplifies life for developers and users alike. In this article, we will thoroughly examine how these tokens work, their history, advantages, and limitations.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Ch2>\u003Cspan class=\"ez-toc-section\" id=\"What_are_ERC-20_tokens\">\u003C\u002Fspan>\u003Cspan style=\"font-weight: 400\">What are ERC-20 tokens?\u003C\u002Fspan>\u003Cspan class=\"ez-toc-section-end\">\u003C\u002Fspan>\u003C\u002Fh2>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">ERC-20 tokens are a standard created for the Ethereum network that functions as a universal language for interacting with all applications within the blockchain. Thanks to this standard, developers can easily create tokens, and users can utilize them in various applications, such as DeFi or NFTs.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">How do ERC-20 tokens work?\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">ERC-20 defines a set of rules for creating and operating tokens. This simplifies their use in any applications compatible with Ethereum. For example, DeFi platforms accept tokens from different developers, as they all follow the same standard.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Cp>\u003Cb>Usage example: \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">you can send a token, and the smart contract automatically checks your balance and transfers the asset to the new owner.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">Where is the ERC-20 standard used?\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Cp>\u003Cb>ICOs (Initial Coin Offerings): \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">most tokens created to attract investments follow this standard.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Cp>\u003Cb>NFTs (non-fungible tokens): \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">although NFTs use a different standard (for instance, ERC-721), many auxiliary tokens for managing NFTs are built on the ERC-20.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Cp>\u003Cb>Wallets: \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">ERC-20 tokens are supported by popular wallets like MetaMask, Trust Wallet, and others, making them convenient for users.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">Why is ERC-20 popular?\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Col>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">Developers know how to create tokens, and users can easily manage them.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">The standard is based on smart contracts that operate automatically, reducing errors and minimizing human influence.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">ERC-20 tokens are applicable in various fields—from decentralized finance to blockchain gaming.\u003C\u002Fspan>\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Ch2>\u003Cspan class=\"ez-toc-section\" id=\"History_and_Development_of_the_ERC-20_Standard\">\u003C\u002Fspan>\u003Cspan style=\"font-weight: 400\">History and Development of the ERC-20 Standard\u003C\u002Fspan>\u003Cspan class=\"ez-toc-section-end\">\u003C\u002Fspan>\u003C\u002Fh2>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">ERC-20 was proposed in 2015 by Vitalik Buterin and the Ethereum team. The main goal of creating the standard was to simplify the process of token development and their integration into the Ethereum ecosystem.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">Why did ERC-20 become important?\u003C\u002Fspan> \u003Cspan style=\"font-weight: 400\">Before its introduction, each token was created with unique rules, leading to confusion and difficulties in usage. ERC-20 addressed this problem by providing a unified set of rules that simplifies interaction between tokens and applications.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Cp>\u003Cb>Today&#8217;s role of ERC-20:\u003C\u002Fb>\u003C\u002Fp>\n\u003Cul>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">The standard is used by millions of users.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">Most crypto projects, including DeFi, ICOs, and auxiliary tokens for NFTs, are based on ERC-20.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">This standard has become the foundation of the Ethereum ecosystem.\u003C\u002Fspan>\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch2>\u003Cspan class=\"ez-toc-section\" id=\"Technical_Features_of_ERC-20_Tokens\">\u003C\u002Fspan>\u003Cspan style=\"font-weight: 400\">Technical Features of ERC-20 Tokens\u003C\u002Fspan>\u003Cspan class=\"ez-toc-section-end\">\u003C\u002Fspan>\u003C\u002Fh2>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">The ERC-20 standard is a set of rules that define how tokens interact with each other and with applications on the Ethereum blockchain. Tokens are created using mandatory and optional methods, which makes them versatile and easily integrable into the ecosystem.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">Example Methods of the ERC-20 Standard\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Ctable>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>\u003Cb>Method\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cb>Required\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cb>Description\u003C\u002Fb>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cb>name\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">No\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">The name of the token, e.g., &quot;Tether USD&quot;.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cb>symbol\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">No\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">The token&#8217;s shorthand, e.g., USDT.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cb>decimals\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">No\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">The number of decimal places.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cb>transfer\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Yes\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Transfer tokens from one user to another.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cb>approve\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Yes\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Authorization for a third party to use tokens.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">Why is Testing Contracts Important?\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">Smart contracts on which ERC-20 tokens operate require thorough verification before launch, as errors can lead to financial losses.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Cp>\u003Cb>Example of an error: \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">if the transfer method is incorrectly configured, tokens can be locked in the contract or sent to the wrong address.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Cp>\u003Cimg loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-42087\" src=\"https:\u002F\u002Fstaging-wp-landing.ecos.am\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F201825.jpg\" alt=\"Основные функции стандарта ERC-20\" width=\"1024\" height=\"575\" srcset=\"https:\u002F\u002Fs3.ecos.am\u002Fwp.files\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F201825.jpg 1024w, https:\u002F\u002Fs3.ecos.am\u002Fwp.files\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F201825-300x168.jpg 300w, https:\u002F\u002Fs3.ecos.am\u002Fwp.files\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F201825-768x431.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \u002F>\u003C\u002Fp>\n\u003Cp>\u003Cb>Benefits of Testing:\u003C\u002Fb>\u003C\u002Fp>\n\u003Cul>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">Reduction of token loss risks.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">Increased user trust.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">Protection against vulnerabilities and hacker attacks.\u003C\u002Fspan>\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">Core Functions of the ERC-20 Standard\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Ctable>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>\u003Cb>Function\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cb>Description\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cb>Usage Example\u003C\u002Fb>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">transfer\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Transfer tokens between users.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">A user sends tokens to a friend. The smart contract checks the balance and executes the operation.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">approve\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Grant permission to another address to use your tokens.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">A user authorizes a dApp to use 50 tokens for exchange.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">allowance\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Check how many tokens are available for use by another address.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">The application checks the available balance before performing the operation.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">balanceOf\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Check the current balance of tokens with the user.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">The application shows the balance of tokens owned by a specific address.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">Mandatory and Optional Methods\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Cul>\n\u003Cli style=\"font-weight: 400\">\u003Cb>Mandatory Methods: \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">these are minimum requirements without which the token will not function. For instance, \u003C\u002Fspan>\u003Cb>transfer\u003C\u002Fb>\u003Cspan style=\"font-weight: 400\"> and \u003C\u002Fspan>\u003Cb>approve\u003C\u002Fb>\u003Cspan style=\"font-weight: 400\"> are necessary for basic operations.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cb>Optional Methods: \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">they improve user experience. For example, \u003C\u002Fspan>\u003Cb>name \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">allows displaying the token&#8217;s name in applications. \u003C\u002Fspan>\u003Cb>Symbol \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">simplifies token identification. \u003C\u002Fspan>\u003Cb>Decimals\u003C\u002Fb>\u003Cspan style=\"font-weight: 400\"> indicates how many digits are used for fractional parts of the token.\u003C\u002Fspan>\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">Example Interaction with ERC-20 Tokens\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Col>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">A user sends a token to a friend using the \u003C\u002Fspan>\u003Cb>transfer\u003C\u002Fb>\u003Cspan style=\"font-weight: 400\"> method.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">The smart contract checks the balance of the sender using the \u003C\u002Fspan>\u003Cb>balanceOf\u003C\u002Fb>\u003Cspan style=\"font-weight: 400\"> method.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cspan style=\"font-weight: 400\">After successful verification, the token is credited to the recipient.\u003C\u002Fspan>\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Ch2>\u003Cimg loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-42088\" src=\"https:\u002F\u002Fstaging-wp-landing.ecos.am\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F5cdb807662c845c496dce9c7bc71c730-1024x576.jpg\" alt=\"Преимущества использования токенов ERC-20\" width=\"1024\" height=\"576\" srcset=\"https:\u002F\u002Fs3.ecos.am\u002Fwp.files\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F5cdb807662c845c496dce9c7bc71c730-1024x576.jpg 1024w, https:\u002F\u002Fs3.ecos.am\u002Fwp.files\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F5cdb807662c845c496dce9c7bc71c730-300x169.jpg 300w, https:\u002F\u002Fs3.ecos.am\u002Fwp.files\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F5cdb807662c845c496dce9c7bc71c730-768x432.jpg 768w, https:\u002F\u002Fs3.ecos.am\u002Fwp.files\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F5cdb807662c845c496dce9c7bc71c730-1536x864.jpg 1536w, https:\u002F\u002Fs3.ecos.am\u002Fwp.files\u002Fwp-content\u002Fuploads\u002F2024\u002F12\u002F5cdb807662c845c496dce9c7bc71c730.jpg 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \u002F>\u003C\u002Fh2>\n\u003Ch2>\u003Cspan class=\"ez-toc-section\" id=\"Advantages_of_Using_ERC-20_Tokens\">\u003C\u002Fspan>\u003Cspan style=\"font-weight: 400\">Advantages of Using ERC-20 Tokens\u003C\u002Fspan>\u003Cspan class=\"ez-toc-section-end\">\u003C\u002Fspan>\u003C\u002Fh2>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">ERC-20 standard tokens have several advantages that make them the foundation of the Ethereum ecosystem. Let&#8217;s explore them in detail.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Cp>&nbsp;\u003C\u002Fp>\n\u003Ctable>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>\u003Cb>Advantage\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cb>Description\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cb>Usage Example\u003C\u002Fb>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Compatibility\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">They work with all Ethereum wallets and applications.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">The USDT token (ERC-20 standard) is used on exchanges like Binance, Coinbase, and in wallets like MetaMask and Trust Wallet.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Simplicity\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Easy to create a new token with minimal coding knowledge.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Startups create their tokens in just a few days for ICOs or internal operations.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Integration\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Suitable for DeFi, NFTs, ICOs, and other Ethereum applications.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">In DeFi, tokens such as UNI and AAVE are actively traded and used for project governance.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Flexibility\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Universal methods for working with tokens: transferring, checking balances.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">ERC-20 methods like transfer and balanceOf ensure ease of interaction.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Transparency\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">All operations with tokens can be verified on the blockchain.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Any user can check the history of transactions of a token via Etherscan.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Time Savings\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Using a ready-made standard instead of developing tokens from scratch.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Developers focus on the product rather than creating a complex token infrastructure.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Popularity\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">A recognized standard for most crypto projects, easily integrable.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Most successful projects, such as Chainlink and MakerDAO, use ERC-20.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">Details and Examples\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Col>\n\u003Cli style=\"font-weight: 400\">\u003Cb>Compatibility: \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">ERC-20 tokens can be used on any Ethereum platforms. This is particularly important for decentralized applications (dApps) that require interaction with different tokens.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cb>Simplicity: \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">Creating tokens takes minimal time. For instance, startups launch their tokens to attract investments through ICOs or for loyalty programs.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cb>Integration: \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">ERC-20 tokens are used in DeFi protocols for lending and trading, as well as in the NFT ecosystem for auxiliary operations.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cb>Transparency: \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">Blockchain allows for tracking token transactions, ensuring trust for users and investors.\u003C\u002Fspan>\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Ch2>\u003Cspan class=\"ez-toc-section\" id=\"Limitations_and_Issues_of_ERC-20_Tokens\">\u003C\u002Fspan>\u003Cspan style=\"font-weight: 400\">Limitations and Issues of ERC-20 Tokens\u003C\u002Fspan>\u003Cspan class=\"ez-toc-section-end\">\u003C\u002Fspan>\u003C\u002Fh2>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">Despite the popularity and versatility of the ERC-20 standard, it has its drawbacks, which affect the use of tokens in various projects.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Ctable>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd>\u003Cb>Issue\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cb>Description\u003C\u002Fb>\u003C\u002Ftd>\n\u003Ctd>\u003Cb>Example\u003C\u002Fb>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">High Fees\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Transaction costs sharply increase during high load on the Ethereum network.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">During peak periods in 2024, transaction fees for token transfers reached $20 and above, making small transactions unprofitable.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Vulnerabilities\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Errors in smart contract code can lead to token loss.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">In 2017, due to an error in the Parity contract, funds totaling millions of dollars were locked.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003Ctr>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Scalability\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Limited throughput of the Ethereum network (~30 transactions per second).\u003C\u002Fspan>\u003C\u002Ftd>\n\u003Ctd>\u003Cspan style=\"font-weight: 400\">Heavy loads during times of NFT and DeFi popularity caused delays and high fees.\u003C\u002Fspan>\u003C\u002Ftd>\n\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Ch3>\u003Cspan style=\"font-weight: 400\">Details and Explanations\u003C\u002Fspan>\u003C\u002Fh3>\n\u003Col>\n\u003Cli style=\"font-weight: 400\">\u003Cb>High Fees. \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">Ethereum uses a “gas fee” model that depends on the current load on the network. During periods of high activity, fees for simple ERC-20 transactions can be too expensive, especially for small transfers.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cb>Vulnerabilities. \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">ERC-20 smart contracts require thorough testing. Errors in the code can render tokens inaccessible or vulnerable to hackers. Projects that do not undergo audits often become targets for attacks, leading to loss of funds.\u003C\u002Fspan>\u003C\u002Fli>\n\u003Cli style=\"font-weight: 400\">\u003Cb>Scalability. \u003C\u002Fb>\u003Cspan style=\"font-weight: 400\">The Ethereum network has a limited transaction processing speed (~30 TPS). With a high number of users, this leads to delays and increased fees.\u003C\u002Fspan>\u003C\u002Fli>\n\u003C\u002Fol>\n\u003Ch2>\u003Cspan class=\"ez-toc-section\" id=\"Conclusion\">\u003C\u002Fspan>\u003Cspan style=\"font-weight: 400\">Conclusion\u003C\u002Fspan>\u003Cspan class=\"ez-toc-section-end\">\u003C\u002Fspan>\u003C\u002Fh2>\n\u003Cp>\u003Cspan style=\"font-weight: 400\">ERC-20 is a key standard that has played an important role in the development of the crypto industry. It has significantly simplified the creation of tokens and their integration into the blockchain ecosystem. However, despite its popularity, the standard has its limitations, such as a lack of support for complex functions and interactions between tokens. These limitations encourage the emergence of new standards capable of expanding the capabilities of blockchains and tokens.\u003C\u002Fspan>\u003C\u002Fp>\n\u003Cp>&nbsp;\u003C\u002Fp>\n","ERC-20 tokens are the foundation of the Ethereum ecosystem. They allow for&#8230;","\u003Cp>ERC-20 tokens are the foundation of the Ethereum ecosystem. They allow for&#8230;\u003C\u002Fp>\n","https:\u002F\u002Fecos.am\u002Fen\u002Fblog\u002Ferc-20-tokens-understanding-their-role-and-functionality-in-ethereum","2025-07-01T09:00:42","","ecos-team","https:\u002F\u002Fecos.am\u002Fauthor\u002Fecos-team","https:\u002F\u002Fs3.ecos.am\u002Fwp.files\u002Fwp-content\u002Fuploads\u002F2025\u002F07\u002Fffdudy1lrgpzyjdxyacbs_443d56db4d4e46889578350c7f48929d.jpg.jpg","en",[20,24,27,30,33],{"title":21,"content":22,"isExpanded":23},"What are ERC-20 tokens?","\u003Cp>ERC-20 tokens are a technical standard used for smart contracts on the Ethereum blockchain. They define a common list of rules for all Ethereum tokens to follow, enabling easy interaction and integration within the Ethereum ecosystem.\u003C\u002Fp>\n",false,{"title":25,"content":26,"isExpanded":23},"How do ERC-20 tokens work?","\u003Cp>ERC-20 tokens operate based on a set of rules that dictate how they can be transferred, how users can approve transactions, and how users can access their token balances. This consistency allows developers to build applications that can interact with any ERC-20 token.\u003C\u002Fp>\n",{"title":28,"content":29,"isExpanded":23},"What are the benefits of using ERC-20 tokens?","\u003Cp>The main benefits of ERC-20 tokens include their ease of use, compatibility with existing wallets and exchanges, and automatic execution through smart contracts. This reduces risks associated with human error and streamlines transactions.\u003C\u002Fp>\n",{"title":31,"content":32,"isExpanded":23},"What are the limitations of ERC-20 tokens?","\u003Cp>ERC-20 tokens face several limitations, including high gas fees during network congestion, potential security vulnerabilities in smart contracts, and issues related to scalability within the Ethereum network.\u003C\u002Fp>\n",{"title":34,"content":35,"isExpanded":23},"How are ERC-20 tokens used in the market?","\u003Cp>ERC-20 tokens are commonly used in various applications, including initial coin offerings (ICOs), decentralized finance (DeFi) platforms, and as trading assets on cryptocurrency exchanges, demonstrating their versatility and importance in the crypto economy.\u003C\u002Fp>\n",{"title":37,"description":38,"robots":39,"canonical":45,"og_locale":46,"og_type":47,"og_title":7,"og_description":38,"og_url":45,"og_site_name":48,"article_publisher":49,"og_image":50,"twitter_card":55,"twitter_site":56,"twitter_misc":57,"schema":59},"ERC-20 Tokens: Understanding Their Role and Functionality in Ethereum - Bitcoin mining: mine the BTC cryptocurrency | ECOS - Crypto investment platform","Discover ERC-20 tokens, their workings, advantages, and limitations in the Ethereum ecosystem. Learn how they play a crucial role in blockchain technology.",{"index":40,"follow":41,"max-snippet":42,"max-image-preview":43,"max-video-preview":44},"index","follow","max-snippet:-1","max-image-preview:large","max-video-preview:-1","https:\u002F\u002Fadmin-wp.ecos.am\u002Fen\u002Fblog\u002Ferc-20-tokens-understanding-their-role-and-functionality-in-ethereum\u002F","en_US","article","Bitcoin mining: mine the BTC cryptocurrency | ECOS - Crypto investment platform","https:\u002F\u002Fwww.facebook.com\u002Fecosdefi",[51],{"width":52,"height":53,"url":17,"type":54},1392,656,"image\u002Fjpeg","summary_large_image","@ecosmining",{"Est. reading time":58},"7 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the Importance of ERC-20 Tokens",{"@type":94,"@id":85,"itemListElement":95},"BreadcrumbList",[96,101,105],{"@type":97,"position":98,"name":99,"item":100},"ListItem",1,"Home","https:\u002F\u002Fstaging-new-landing.ecos.am\u002Fen\u002F",{"@type":97,"position":102,"name":103,"item":104},2,"Blog","https:\u002F\u002Fstaging-new-landing.ecos.am\u002Fen\u002Fblog\u002F",{"@type":97,"position":106,"name":7},3,{"@type":108,"@id":81,"url":109,"name":48,"description":110,"publisher":111,"potentialAction":112,"inLanguage":77},"WebSite","https:\u002F\u002Fadmin-wp.ecos.am\u002F","Bitcoin mining and cloud bitcoin 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