Erc20 contract example. Examples of ERC20 Tokens in Action.

Erc20 contract example A meta-class is a class which is defined at run-time. This is useful, for example, for contracts that act as sellers. json file and a <example-name>. , /// @custom:oz-upgrades-from MyToken). Dec 6, 2024 · ERC20 is a standard for fungible tokens on the Ethereum blockchain. This approach is perfectly reasonable for contracts that have a single administrative u This is useful, for example, for contracts that act as sellers. Make a token with supply of 10 million What does mintable do? Make a contract for a DAO ERC20 Smart Contract Sample. For instance, the same contract might be able to handle the initial sale of different ERC20 tokens. This command will create a new project folder named erc20 with the following content: Transfer ERC20 tokens to the timelock contract. Using OpenZeppelin : Import OpenZeppelin ’s ERC20 standard library for a secure and tested Jan 5, 2022 · What are ERC20 Smart Contracts? “Ethereum Request for Comment 20”, or ERC20, was implemented back in 2015, the same year when the Ethereum chain saw the light of day. ” Below is the ERC20-compatible contract we created, including a Gist of our code. As such, the ERC20 standard was born. To understand how ERC20 tokens work, you can read Ethereum docs. ERC20 Tax token sample. This repository provides two upgradeable ERC20 smart contract templates that include the new function permit, which allows users to modify the allowance mapping using a signed message (via secp256k1 signatures), instead of through msg. This makes ERC20 tokens useful for things like a medium of exchange currency, voting rights, staking, and mo An ERC20 token contract keeps track of fungible tokens: any one token is exactly equal to any other token; no tokens have special rights or behavior associated with them. js. I'm curious if this very simple contract looks We'll explore more ethers functionality by looking at an ERC20 contract example from the documentation. In this simple example we will be deploying an ERC20 token from our factory contract. The GovernorAlpha and GovernorBravo contracts designed by Compound have been very successful and popular so far, with the downside that projects with different requirements have had to fork the code to customize it for their needs, which can pose a high risk of introducing security issues. Contracts cannot monitor for events, so if a buyer were to transfer tokens to the seller contract directly that contract wouldn't know it was paid. Here’s a simple example: Overall, the ERC-20 smart contract above is very similar to MyToken. To create a new smart contract, select them to erase it and create a new file. Apr 6, 2023 · The concept of Meta-Classes is somewhat confusing, so we will go over a short example. An amount of the original token is locked in a digital vault, and in return this allows an equivalent Nov 5, 2023 · This section will offer links to example reference materials, allowing you to explore real-world ERC20 contracts on Starknet. Having a standard for the properties that define a token enables developers who follow the specification to build applications that can interoperate with other products and services. To create an ERC20 contract, it must implement the following interface: The standard interface implemented by tokens built on Ethereum is called ERC20, and Contracts includes a widely used implementation of it: the aptly named ERC20 contract. It includes the most used implementations of ERC standards. ink! is a smart contract language which targets the API exposed by pallet-revive. For an overview of ERC20 tokens and a walk through on how to create a token contract read our ERC20 guide. sol, Owner. We do this in two ways: first, by calling a function in the SDK, and second, by using the balanceOf function in the ERC20 contract. Feb 14, 2024 · These contracts have been thoroughly tested and audited, making them a reliable choice for developers. Mar 8, 2021 · This is useful, for example, for contracts that act as sellers. It combines: NFT Drop contract: To create a collection of NFTs that users can stake. The Nov 17, 2017 · After that, we will use similar tricks to fully go through every function of ERC20 token contract. Apr 4, 2020 · One of the most significant smart contract standards on Ethereum is known as ERC-20, which has emerged as the technical standard used for all smart contracts on the Ethereum blockchain for fungible token implementations. Jan 30, 2025 · Factory contract creates an ERC-20 token based on the token spec imported (e. Apr 6, 2020 · Approving the transfer requires the ERC20Basic token instantiated by the DEX to be called by the user. Aug 11, 2022 · ERC20 Contract. Write or paste the ERC20 token contract code. Mar 26, 2024 · ERC-20 Staking Contract: manages staking, rewards, withdrawals; To deploy these contracts, head over to the thirdweb dashboard, connect your wallet, and go to the Contracts page: Deploy 2 ERC-20 Token contracts, one for the staking token and the other for the reward token. Jan 27, 2022 · In this tutorial we are going learn how to create a wrapped token using the ERC20Wrapper contract provided by OpenZeppelin, but first let's get familiar with what a wrapped token is. Here is an example of a simple implementation: Oct 29, 2020 · When extending OpenZeppelin Contracts ERC20 implementation to create your own ERC20 token then you should unit test any functionality that you are adding. These are quite important for our next Storage. It also enables contracts that handle tokens to be written once and used across many different tokens. If the native token is not a standard ERC20 implementation (e. The ERC-20 specification defines a common standard for fungible tokens. Hence ink! contracts are compiled to PolkaVM bytecode. Custody of multiple tokens can be given to this contract, which will release the token to the beneficiary following a given vesting schedule. For example, the ERC20PresetMinterPauser smart contract has so far imported at least four reference contracts. Mar 24, 2022 · ERC20 contract. Here is the ERC-20 contract code - pragma solidity ^0. The goal of the dApp The goal of this challenge is to create your own ERC20 Token and a Token Vendor Contract that will handle the sell/buy process of your token exchanging it with ETH sent by the user. The constructor function initializes your token with a name ("MyToken") and a symbol ("MTK"). You signed out in another tab or window. Let's see how a Standard is so important to make things simple for us to inspect any ERC-20 Token Contract on Ethereum. 22 <0. Functions and Event of all ERC-20 contracts: Oct 4, 2022 · The Solidity ERC20 token standard is the foundational smart contract implementation on Ethereum. Learn how ERC20 tokens work with Alchemy University. Aug 6, 2023 · Example of ERC20 smart contract with customised functionality Above is a very simple example of how you can add additional functionality to your code. What can ERC-20 tokens do? By putting together all of the functions above, we’ve got an ERC-20 contract. We keep an eye on how this affects the Vault contract's balance. contract file combines the Wasm and metadata into one file and needs to be used when deploying the contract. 0 <0. This can be achieved by first calling the DEX contract's token() function to retrieve the address where DEX deployed the ERC20Basic contract called token. Sep 22, 2023 · EVM & Solidity Smart Contracts; Sample contract: ERC20 token. balanceOf(address): Provides the balance of tokens held by a specific address. I'm sure you guys hear it all the time these days but I'm putting things together with chatgpt and it seems to be working but I want to confirm before deploying and adding liquidity that things are proper. pragma solidity >=0. In the file manager on the left, create a new Solidity file, for example, MyToken. The token creator wants the unit of to represent 1 kilogram of gold, but also wants to allow users . sol"; import ". Short for Ethereum Request for Comments 20, ERC20 defines a set of rules and functions that Ethereum-based tokens must adhere to, ensuring interoperability and compatibility with the various applications, wallets, crypto exchanges, and smart contracts across the Ethereum The VITE/ETH token contract makes good use of a number of reference contracts, such as ERC20, AccessControl, Pausable, and Ownable, to facilitate its code implementation and organization. You switched accounts on another tab or window. ), the contract might not work as expected and it is strongly recommended to not use this contract with such a token. Let's get started! What is Starknet? StarkNet is a decentralized permissionless Layer 2 ZK-Rollup Dec 28, 2022 · For example, tokens that are used as currencies may benefit more from being more divisible than a token that represents ownership of a property. A great example of a token implementing the ERC20 standard is ETH, which is the native currency of Ethereum. Dec 30, 2023 · Hello, first off, i'm new around here so thanks ahead of time for everything! I'm a very new, learning developer. An interactive smart contract generator based on OpenZeppelin Contracts. sol that. This smart contract is an implementation of the ERC20 token standard in the Solidity programming language. ERC-20 is a standard interface for tokens widely used standard for creating fungible tokens, which are tokens that are interchangeable and have a uniform value. Compile the SimpleStaking. This is why its balanceOf function differs from ERC20’s and ERC777’s: it has an additional id argument for the identifier of the token that you want to query the balance of. 05 This must be an ERC20-compatible contract (ERC20 or ERC777). An ERC-20 token consists of a smart contract that implements the standardized interface, which comprises a set of six mandatory functions: totalSupply(): Returns the total supply of the token. The code is based on the official ink contract examples. The ERC20 standard outlines the essential functions of tokens, and utilizing the OpenZeppelin library helps streamline the token creation process, ensuring safety and compliance Contracts that follow the ERC20 Standard are called ERC20 tokens. Aug 4, 2024 · This example demonstrates a use of several thirdweb tools to create an NFT Staking application. ERC20 is just an interface, not an implementation. What is ERC1155? ERC1155 is a multi-token standard that allows the creation of fungible, non-fungible, and semi-fungible tokens all in one contract. have more than amount Copy // A Human-Readable ABI; we only need to specify relevant fragments, // in the case of deployment this means the constructor const abi = ["constructor(uint totalSupply)"]; const factory = new hethers. Nov 10, 2023 · This guide will show you how to deploy any smart contract to the Starknet network. Introduction to wrapped tokens A wrapped token is a token whose value is tied to an underlying cryptocurrency. Looking to deploy on AVAX. Where it deploys a simple ERC20 contract with market fees on each transaction. Creating ERC20 contract template. This contract, like the standard itself, is quite simple and bare-bones. ContractFactory(abi, bytecode, signer); // Deploy, setting total supply to 100 tokens (assigned to the deployer) const contract = await The ERC20 contract from OpenZeppelin is imported and used as a base. , ERC20. 10; import "ds-test/test. In this example, users can stake their ERC721 NFTs and earn ERC20 tokens as a reward. Feb 28, 2024 · Throughout this article, you will see the functionalities of all the smart contracts that we wrote for creating an ERC20 token in the last article. restricting or modifying transfer functions, implementing transfer blocklists, being a rebase token, etc. Token contract: To create a token that users can earn as a reward for staking. sol Mar 8, 2021 · This is useful, for example, for contracts that act as sellers. Jul 3, 2021 · Solidity is an Object-oriented Programming Language for implementing Smart Contracts. Also in Openzeppelin there is a smart contract called VestingWallet. If the token contract then returns false, the calling contract will think the transfer failed, even though nothing This project is maintained by OpenZeppelin with the goal of providing a secure and reliable library of smart contract components for the ecosystem. Step 1: Decide what you want your Token to be In order to create an ERC20 token, you will need the following: The Token’s Name The Token’s Symbol The Token’s Decimal Places The Number of Tokens in Circulation The decimal places is something where things can get tricky. Why Use ERC20 Token Simple ERC20 Token Contract The OpenZeppelin Library ERC20 Token Functions Conclusion Why U Sep 10, 2021 · In the previous scaffold-eth challenge, we have created a Staker dApp. As you can see below we will use a simplified ABI, to make it a low friction example. 0; import ". 11; /** * Math operations with safety chec This governance protocol is generally implemented in a special-purpose contract called “Governor”. External Documentation. I did a simple contract in remix the other day using the import function but when pragma solidity ^0. You can watch the video and follow along with the sample contract here. LayerZero is an Omnichain Interoperability Protocol, facilitating reliable, trustless communication between different blockchain networks. sol contract. The example below includes a SimpleToken ERC20 contract and a TokenReceiver contract (that uses the token), along with the migrations script for truffle to deploy the contracts and some sample interactions using truffle console. It covers preparing a Web3 wallet, acquiring test ETH, writing and deploying smart contracts, and more. (thanks @Skyge) As a minimum, you would ideally test MetaData, supply, minting (if not fixed supply). sender. Let’s start with a small ERC20 contract, that we bootstrapped using the OpenZeppelin Contracts Wizard, and extended with an owner that has the ability to mint. This contract only supports standard ERC20 implementations. This token has 18 decimal places: ERC20 Code: The Contract Address 0xdac17f958d2ee523a2206206994597c13d831ec7 page allows users to view the source code, transactions, balances, and analytics for the contract address. | Smart Contracts Audit Welcome to the solidity-examples repository, showcasing various contract examples utilizing LayerZero. Sample blueprint for deploying ERC20 tokens and other smart contracts with truffle - GitHub - mikeghen/erc20-truffle-example: Sample blueprint for deploying ERC20 tokens and other smart contracts with truffle The contract, like all contracts, lives on a particular EVM (ethereum virtual machine), for example Ethereum EVM or Polygon EVM. The ownable smart contract This project extends the Hardhat advanced sample project and includes a simple ERC20 token contract as well as a vesting schedule contract. 6. Sep 29, 2024 · This tutorial provides a step-by-step guide on issuing your own ERC20 token on the Ethereum test network. ERC20 Token. Jan 27, 2023 · If you don't already have a token contract deployed, you can create an ERC20 token contract from the dashboard in the next step, or create a customizable smart contract in Solidity using the ERC20 Base contract and deploy them too. the example of simple implementation of Diamond Proxy on ERC20 . SimpleToken. Deploy the contract by passing in the official ERC20 token's contract address as the one-and-only constructor parameter. It contains information Sep 4, 2022 · As explained here, the decimals in an ERC20 token are just for representation to the user. py Example An ERC20 token contract keeps track of fungible tokens: any one token is exactly equal to any other token; no tokens have special rights or behavior associated with them. The figure below shows an example of creating WEMIX_ERC20. We have a sample ERC20 contract already created, so let’s go through it to understand what each function does. js and web3. handles the vesting of Eth and ERC20 tokens for a given beneficiary. You can read more about the standard in the following article: “What are ERC20 Contracts?”. sol are shown in the contracts directory. sol, and Ballot. org abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors * For example, if `decimals` equals `2`, a balance of `505` tokens should contracts/ERC20FixedSupply. To do this we just need to implement the IERC7802 interface. Examples of ERC20 Tokens in Action. sol"; interface CheatCodes { function warp (uint256) external;} contract ContractTest is DSTest { // HEVM_ADDRESS is the pre-defined contract that contains the cheatcodes CheatCodes constant cheats = CheatCodes (HEVM_ADDRESS); Contract Oct 21, 2021 · Starting with the ERC20 interface by openzeppelin. In the context of the Torus blockchain, this standard is crucial for ensuring compatibility and interoperability with a broad range of decentralized applications (dApps) and The distinctive feature of ERC1155 is that it uses a single smart contract to represent multiple tokens at once. 0; interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes calldata _extraData) external; } contract TokenERC20 { // Public variables of the token string public name; string public symbol; uint8 public decimals = 18; // 18 decimals is the strongly suggested default, avoid changing it uint256 public totalSupply Usage Example: Deploy ERC20 using Remix Step 1: Prepare the ERC20 Smart Contract Code Open Remix. In this example, we will update the GovernanceToken ERC20 to make it interoperable. An utility smart contract to Airdrop ERC20 / BEP20 Tokens using node. 05 This must be an ERC20-compatible contract (ERC-20 or ERC-777). For example to solve the first exercise the workflow would be the following: deploy a smart contract that answers ex1 → call submit_exercise on the evaluator providing your smart contract address → call ex2_test_erc20 on the evaluator contract. By the end, you'll learn how to deploy it to the Starknet testnet, and mint ERC20 token on the smart contract. The standard interface implemented by tokens built on Ethereum is called ERC20, and Contracts includes a widely used implementation of it: the aptly named ERC20 contract. Dec 17, 2024 · Knowledge of ERC20 and ERC721 (NFT) token standards. Feb 13, 2023 · The concept is to provide a proxy contract which points to the latest and greatest version of the token smart contract. wasm file, a <example-name>. ERC20 tokens are widely used in the blockchain ecosystem and provide a standard way for creating and managing tokens on the Ethereum blockchain. Jan 13, 2022 · The sample contract is adapted from OpenZeppelin documents. Let’s continue with fixedsupplytoken. Another difference between a constructor and a regular function is that Solidity takes care of automatically invoking the constructors of all ancestors of a contract. io Any contract that follow the ERC20 standard is a ERC20 token. 4; contract Token { /// @return total amount of tokens function totalSupply() constant returns (uint256 supply) {} /// @param _owner The address from which the balance will be retrieved /// @return The balance function balanceOf(address _owner) constant returns (uint256 balance) {} /// @notice send `_value` token to `_to` from `msg. g. You can confirm that these tokens have been transferred by pasting the timelock contract's address into the ERC20 contract's balanceOf function, as shown below. MyToken is the name of your contract, and it extends the ERC20 contract. OpenZeppelin, which spearheads the advancement of the ERC20 standard, provides a comprehensive library for secure smart contract development which we will be using to implement our Mar 31, 2023 · ERC20 tokens have become the de facto standard for creating tokens on Ethereum and are widely used in many DeFi protocols for things like governance and utility tokens. This is a simple ERC20 smart contract written in Rust ink!. From the ERC20 token contract, use the transfer function to transfer ERC20 tokens to the timelock smart contract's address. New year, new pricing: The most affordable web3 infrastructure on the market. Once we get an instance of the ERC20 contract, we can call its functions (ERC20 docs by OpenZeppelin). If a contract calls transfer on a token contract with a dynamically calculated amount of tokens, it might sometimes transfer 0. It's a High-Level Statically Typed Language like C. Oct 22, 2023 · Learn to craft your cryptocurrency using OpenZeppelin’s ERC-20 Solidity smart contracts. Or in other words, the permit method, which can be used Sep 7, 2022 · // SPDX-License-Identifier: UNLICENSED pragma solidity 0. ethereum-contract token erc20 erc20-tokens erc20-smart-contract. When writing an initializer, you need to take special care to manually call the initializers of all parent contracts. It provides a set of rules and functionalities for issuing tokens on the Ethereum blockchain, as well as all EVM blockchains. The contracts pallet requires smart contracts to be uploaded to the blockchain as a binary blob. Deploy a ERC20 smart contract on Starknet Follow this guide to deploy the smart contract, if you do it correctly, you should be able to get a ERC20 smart contract deployed on Starknet testnet with name 'reddio token', get 1,000,000 tokens minted and also the smart contract address correspondingly. In the below example, the aim is to Contract to swap tokens. For the most up to date version of this content, please see ERC20 (Code Example) on Cyfrin. Most tokens have 18 decimal pl Jan 30, 2018 · The ERC20 token standard enables different tokens to be treated similarly in marketplaces and exchanges. The ERC-20 token standard is a widespread and respected protocol in the cryptocurrency space. The maximum amount of tokens that can be withdrawn by an account is equal to that accounts balance on the contract. Below are just a few examples of ERC20 tokens in action. Moreover, note that all ERC20 smart contracts, or ERC20 contracts, are smart contracts that follow the ERC20 standard. ERC20 tokens provide functionalities to See full list on ethereum. . 6: 6152: November 5, 2020 Example of withdrawing an ERC20 from another contract. json is created. Whether you're a seasoned blockchain developer or a newcomer to the world of decentralized finance Jun 11, 2024 · Examples. . The name and symbol fields can be changed at will. Notes: To deploy a smart contract, follow these instructions: The most common and basic form of access control is the concept of ownership: there’s an account that is the owner of a contract and can do administrative tasks on it. Sep 25, 2022 · A token factory contract is used to deploy tokens from a parent contract within Solidity. Web3. sender` /// @param _to The address of the You signed in with another tab or window. In this challenge, we are going to create a Token Vendor contract. This contract will swap tokens by calling. sol file in the contracts directory. The _mint function in the constructor mints an initial supply of tokens. Disclaimer: This repository contains example contracts to demonstrate the capabilities and usage of Nov 5, 2020 · Is there a simple ERC20 token and test contract example? Contracts. We shall create a simple ERC20 contract, which allows users to mint some tokens initially, check their balances, and transfer tokens to other users. Check out this example on GitHub to see these elements in a real contract. Jan 15, 2024 · For testing, you can use contracts that are already in the Remix, for example storage or owner. /GSN/ Skip to main content Jan 22, 2023 · Two other prominent examples are ERC20 and ERC1155: The ERC20 Standard – Unlike ERC721, ERC20 is a standard for fungible tokens. and links to the erc20-smart-contract topic page so that developers can more easily learn about it. The EVM has nothing to do with it. Sep 15, 2017 · The second example uses GoldToken, a token contract that represents ownership of physical gold. Sample Fixed Supply Token Contract. contract file in the target/ folder of your contract. A wallet that recognizes ERC20 tokens and knows how many decimals a token has (by calling decimals() function), can represent the number of tokens to the user in a more readable way. The . Note: You can easily change variables in the deployment script to modify things like the name of the token, symbol, supply, amount to send to the vesting Storage. transferFrom(address sender, address recipient, uint256 amount) ‍ which will transfer amount of token from sender to recipient. Test every function Sep 6, 2023 · It also guarantees that the token can be traded on cryptocurrency exchanges that support ERC20 tokens. In your case, I think you can find your answer via this link. Master ERC20-contracts to mint fungible tokens. We address security through risk management in various areas such as engineering and open source best practices, scoping and API design, multi-layered review processes, and incident response preparedness. We just need the Contract Application Binary Interface (ABI) to create an interface to any ERC-20 Token. They are used to represent fungible assets. Sep 30, 2017 · contract MyERCToken {uint8 public constant decimals = 18;} The total source code of ERC20 token that we just created can be found here. Learn Solidity. So for example, the initial launch of STAIK token would be “v1”, but if Jul 20, 2018 · I am trying to send ERC-20 token that was deposited to my contract address to another address. For example, if decimals equals 2, a balance of 505 tokens should be displayed to a user as 5. If an account How To Create an ERC20 Token: Mint The Cryptocurrency. ERC20 Token Contract - made in Remix IDE, following Block_Hacks tutorial. 8. OpenZeppelin Docs. When executing cargo contract build an additional file <contract-name>. As said before, inheriting from the ERC20 contract, gives us access to the _mint() method used to create new tokens, and send them to a given address, exactly what we need now. sol constructor initialized with the correct supply (118ms) check the contract deployer is the new owner and has all the money (45ms) adding spenders that can transfer money on behalf of the token owner current owner approves a new account to be the spender In Solidity, a smart contract’s functions and events are wrapped into an entity called a contract which you can silently translate to a “blockchain class. sol. sol) in the contract Now that we understand the Factory pattern and how it will be used in our context, let's discuss the ERC-20 token implementation we'll use when a user wants to create a token. Tokens that return no value (and instead revert or throw on failure) are also supported, non-reverting calls are assumed to be successful. 4. A Contract is specified by an Application Binary Interface (ABI), which describes the methods and events it has. Feb 15, 2023 · ERC20 token contract; This is an example of a validation test. Following is a sample Fixed Supply Token contract with a fixed supply of 1,000,000 units that are initially assigned to the owner of the contract. What this means is that developers know that anything that is an ERC20 has a standard set of functions they can call to interact with it, for example: Wrappers around ERC20 operations that throw on failure (when the token contract returns false). For transferFrom to succeed, sender must. Here we showcase our test ERC20 token repo to demonstrate how one would develop a contract for Humanode Network. Reload to refresh your session. There a few core contracts that implement the behavior specified in the EIP: IERC20 : the interface all ERC20 implementations should conform to. Dec 27, 2017 · One of the most important features of the EVM is that contracts can call functions in other contracts. js - hironate/token-airdrop-contract (Sample file included, you can also download erc20 The ERC-20 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) as another Token. To create an ERC20 conctract, it must implement the following interface: This tutorial illustrates how you can build an ERC-20 token contract using the ink! language. Learn from practical examples and kick-start your own ERC20 projects. sol but has differences, such as a different contract name, symbol and contains a Foundry/OpenZepplin annotation needed to upgrade our contract (e. Hope it helped! Dec 20, 2020 · I copied and pasted the example ERC20 contract from openzeppelin, but for some reason i cant find out where i can set the TotalSupply. As a result you'll get a file target/<example-name>. /Contract. Before ERC1155, if a use case needed both ERC20 (fungible) and ERC721 (non-fungible) tokens, then separate contracts were required to achieve this. ERC-20 defines a common list of rules that all fungible Ethereum tokens should adhere to. Then we create an instance of that contract in our session and call its approve function. In the end, the original ERC20 proposal is rather This section explains how to modify an existing ERC20 contract to make it interoperable within the Superchain. You can use the tests in OpenZeppelin Contracts repository for inspiration. Aug 16, 2019 · pragma solidity >=0. Contracts that follow the ERC20 Standard are called ERC20 tokens. In our second example, we deposit 1000 tokens into the Vault contract and then withdraw them. We are not using OpenZeppelin contracts for our sample contracts. Note that for demonstration purposes we have not used the built-in Ownable contract. Feb 13, 2023 · It is the most adopted and accepted standard for fungible tokens by the community. Instead, the buyer permits the seller contract to spend a certain amount, and the seller transfers that amount. The article focuses on discussing the decentralized bank smart contract in Solidity. Here is an example contract, TokenSwap, to trade one ERC-20 token for another. This makes ERC20 tokens useful for things like a medium of exchange currency, voting rights, staking, and mo Feb 11, 2021 · Trying to verify my token on PolygonScan 0x3d1a45b45f7d2476ca093b02179daeffd6a95213. The solidity file has an extension . We create a buyTokens() function that allows Apr 16, 2021 · The receiving contract can use IERC20 to interact with the tokens ERC20 functions. In this example, 1 million tokens are Welcome to the Simple ERC-20 Token Deployment project! This repository contains a comprehensive guide and implementation of a smart contract for deploying an ERC-20 token on the Ethereum blockchain. Call the setTimestamp function (as the contract owner) by passing in a value (in seconds) for which you want the timelock period to be. /. Watching this video will be helpful to see how our concepts are actually used in a contract. OpenZeppelin Contracts helps you minimize risk by using battle-tested libraries of smart contracts for Ethereum and other blockchains. In your working directory run: cargo contract new erc20. xesvlen mgls dubdr qswm rzhcbcj gekbm ffhuff yza dumdlzb qinma vdz zacqcuv assidj lugt scffb