Ethereum ERC20 Token Development

How to Create ERC-20 token on Ethereum Network?

 Ethereum ERC20 Token

Blockchain technology is taking over the world. Blockchain technology is the source of Bitcoin, the most widely used virtual currency at present. Blockchain technology is the result of Ethereum. It was created after the explosion of Bitcoin. Bitcoin is based on currencies only, but Ethereum provides a virtual machine and smart contract that allow users to deploy tokens. This is very similar to Bitcoin. A token can be used to represent a virtual currency or an ounce of pure gold. Many different tokens can be created on the Ethereum blockchain. However, this tutorial will focus on creating and deploying ERC-20 tokens.

Perhaps you are wondering "Why should my token be created?" Blockchain, Ethereum, and tokens have become a major part of software development. Learn how to create an Ethereum token and you will be able to understand how blockchain technology works.

You should have a basic understanding of blockchain technology, Ethereum solidity, and how Ethereum works to follow this tutorial. We'll go over the basics again before you start building your token.

What is blockchain? How does it work?

A blockchain, in simple terms, is a record of transactions in a ledger or database distributed among many participants in a network. This ledger records transactions that were made within the network. A transaction is the transfer of currency or money from one user to another in the network. Let's take, for example, Alice's sending Bob 30BLC. This transaction is cryptographically hashed and then recorded in the ledger starting at a particular node in the network.

This node transmits the transaction to all other nodes within the network. This transaction is sent to the other nodes, who verify it using a standard verification process and add it to their ledger.

The network's nodes listen for new transactions that are broadcast or emitted to them and then add the transaction to their ledgers. It is clear that every node on the network has a copy or has access to the ledger. This is what enables the blockchain to be distributed. "Blockchain is the term for transactions and records that are linked within a ledger. As we all know, a transaction is an exchange of currency between two nodes.

This transaction is simple. It shows that Bob transferred 30BLC from Alice.

This transaction is now stored in a block. A block is a sort of array that holds objects for transactions. This block can include many transactions. It is easy to see the location of the block. These blocks are linked together by the chain. Every blockchain starts with genesis blocks that are added by the creator and broadcast to the network. Every block has a cryptographic hash that serves as an identifier in the network. No two blocks can have the same hash.

A pointer is a string that points to the hash value of the last block in a network after a block has been verified by the nodes.

By doing this, every new block that is consolidated onto the network points directly to the latest block. This is how the blockchain "chain" is created.

What is Ethereum?

Ethereum is a blockchain that uses a digital currency called Ether. Transactions are stored in a ledger, just like in a generic blockchain. Ethereum's flexibility is what sets it apart from other blockchains. While many blockchain platforms support only transferring currencies, Ethereum allows you to send any data through the blockchain to pay the price using any currency. As we have already mentioned, the Ethereum blockchain allows us to transfer any data and pay the Ether price.

The Ethereum blockchain facilitates ETH transactions, just as we did in the previous example. Let's suppose Alice sends Bob 1 ETH. The transaction is verified by nodes on the network, and the transactions are added to the blocks of the blockchain.

Mining is a job that entails extracting ether. This involves solving hard calculations by trial and error. Any node on the network can perform this task. Each node that successfully solves the problem receives a certain amount of ETH. As more transactions are mined, the difficulty of the work rises. A mining node on the Ethereum network mines transactions whenever they are initiated. The transaction sender must agree to pay a specified amount of ETH to the mining node that will mine it. This is known as the "gas price."

What are smart contracts?

Smart contracts are a feature of Ethereum. Smart contracts are code that is executed on the Ethereum blockchain.

Solidity is used to create smart contracts. These smart contracts can then be compiled into the ABI Code. This ABI code can be deployed to the Ethereum Blockchain. To create its address on the Ethereum blockchain, the smart contract uses the externally-owned address of the sender and the nonce. Digital contracts can be created with smart contracts. These digital contracts are similar to those in real life and allow transactions to be created by multiple parties on the Ethereum blockchain.

Smart contracts are a type of account in Ethereum. It is an account that can send transactions to the blockchain, but it cannot be controlled by users. Smart contracts are accounts that have balances. They also contain an EVM code.

What are ERC-20 tokens exactly?

The Ethereum Virtual Machine (EVM), which is a virtual machine that runs the compiled Solidity ABI Code, is called the Ethereum Virtual Machine. These smart contracts have been used to create many tokens worldwide. These standards were later known as the Ethereum Request for Comment (ERC) standards.


ERC-20, as mentioned above, can be used for creating virtual currencies such as Bitcoin and Ether. Binance Coin (BNB), Shiba Shabu, and Shiba Shabu are two of the most popular tokens built using the ERC-20 standard.

ERC-20 tokens can be sent and received. They can be sent and received as fungible tokens. Their value is the same anywhere on the blockchain.

Let's now look at the ERC-20 token body:

  • The ERC-20 body
  • The ERC-20 token's body contains all the necessary methods and events.
  • An ERC-20 token should be able to
  • Transfer tokens from one account to another.
  • Return the balance to an account
  • Return the total number of tokens in the token pool.
  • Transfer tokens to an account

ERC-20 tokens are popular because of their simplicity and ease of use. ERC20 addresses a critical problem for crypto-wallets as well as blockchain-based marketplaces. It includes rules for interaction with other tokens, along with purchase rules.

ERC20 tokens can be implemented as smart contracts and executed on the Ethereum Virtual Machine in a distributed way just like other Ethereum tokens.


Solidity is the programming language that allows you to create Ethereum smart contracts. Solidity code can be easily interpreted by developers who are proficient in JavaScript and C-like programming languages. This article will demonstrate how to quickly create an ERC20 contract using Solidity. Let's first look at ERC20.

The ERC20 standard describes the basic functions that tokens must implement to integrate with other contracts, markets, wallets, and wallets. These functions enable external users, such as crypto-wallet applications, to check the balance of an account and transfer funds with appropriate authorization.

The most important features of the ERC20 and Solidity nomenclature are:

Public function: This function is accessible outside of the contract.

View function—it simply means "constant". This implies that the function will not alter the internal state or contract.>

Event function: This function alerts clients about certain events in the contract.

Solidity is an ERC20 token.

Locate mapping objects

Two mapping objects are required to satisfy the Solidity notion of a key/value or associative array:

* Mapping (address=>uint256); -This is the definition of an associative array with keys of type address (a number used to denote account numbers) and values of type uint256, a 256-bit integer used to store token balances.

* Balances: it is the first object in the mapping set that holds the token balance for each owner's account.

* Allowed-This is the second mapping object. It will contain all accounts that have been authorized to withdraw tokens from an account, as well as the maximum withdrawal amount for each account.

These mappings, along with other contract fields, will be saved in the blockchain. These mappings will then be mined to propagate the changes across all nodes in the network. Because blockchain storage can be expensive, it is important to reduce storage space. Users of smart contracts will need to pay for them.

Let's now write ERC20 logic to the apt functions
Set the number of ICO tokens

There are many ways to set the maximum number of ICO tokens. We will be using the simplest method: we will set the maximum number of tokens at contract creation, then assign all tokens to the account owner (the account that deployed the smart contract).

An Ethereum function Object() { [native code] } is an Ethereum function that is automatically called after a contract has been deployed. It initialises the token's state using parameters provided by the contract's deployment account. The field that contains the Ethereum account responsible for the execution of the current contract function.

As this function allocates tokens to the contract owner account, the account responsible for deployment can only enter the contract's constructor.

The Total Token Supply-

This function returns the total number of tokens that this contract has allocated, regardless of who the owner is.

Get the token balance from the owner-

This function returns the current token balance for an account. It is identified by its owner's name.

Transfer tokens to another account-

Transfer: This is the function that moves numTokens (amounts of tokens) from an owner's account to a receiver (another user).

Msg.sender: This is the owner of the tokens and the person who executes the function. Transferring tokens to another user is only possible if the token owner has permission.

Requires a statement that is used by solidity to establish a predicate. The transaction will be rolled back immediately if the account does not have sufficient balance to complete the transfer.


Your level of sophistication determines how complex smart contracts are:

  • Business logic
  • Modeling user interaction
  • Choice of burning or minting tokens
  • Introduction of lifecycle modifications
  • Need for admin-level capabilities, etc.

This article will show you how to create ERC20 tokens yourself. You can successfully create and deploy ERC20 tokens if you follow the steps correctly and pay attention to every detail.

Although the basic process doesn't seem too complicated, it can be difficult to complete the task efficiently and without making any mistakes. It is important to note that creating and deploying ERC20 coins that meet your needs can be difficult. This requires a lot of effort, careful work, and expert guidance. It can be much simpler to work with an efficient Ethereum blockchain development firm or team than it is to create and deploy ERC20 tokens. The expertise and experience of Ethereum professionals will help you to easily implement your requirements and meet your expectations. You can also successfully create and deploy an ERC20 token.

PerfectionGeeks has been a leader in the blockchain software development industry. Our team of highly skilled developers can assist you with any kind of Ethereum service you need. Contact us now to find out more.

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