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How to Build a Multi-Chain Account Abstraction Wallet Understanding Account AbstractionAfter Vitalik presented the idea of account abstraction in 2015, it gained attention. The word "account abstraction" is wide, but to put it briefly, it refers to the abstraction of the inflexibility and inherent structure of user accounts in a blockchain. This allows for network interaction while also increasing their flexibility and adaptability. Instead of relying on the pre-built standard Blockchain rules, suppliers of crypto wallet solutions develop user-friendly accounts with unique logic that allows them to apply their own asset storage and transaction conditions.This lets the wallet control user actions without requiring users to sign transactions or physically hold private keys. Wallet development teams create smart contracts that function as user accounts in these kinds of applications. These contracts have the ability to communicate across programs, work with several accounts, and apply unique logic.Multi-Chain Support: Bridging or cross-chain communication protocols can be used as a way to communicate with several blockchains.Smart Contract Architecture: A primary contract and perhaps a factory for generating wallet instances will make up the wallet.Also, Read | ERC 4337 : Account Abstraction for Ethereum Smart Contract WalletsHow to Build a Multi-Chain Account Abstraction WalletStep1: Recognise the Complexities of Account AbstractionUnderstanding the ins and outs of account abstraction is crucial before starting the Account Abstraction wallet process. This is the process of providing user-friendly designs while severing the connection between user accounts and Blockchain accounts.Step:2 Choose an Appropriate Blockchain PlatformChoose a blockchain platform that either supports it natively or can be improved to do so. As an alternative, you may think about Ethereum, which comes with a tonne of Ethereum Improvement Proposals, including ERC-4337, a common AA idea.Step:3 Establish a Development EnvironmentInstall the necessary development tools, such as Hardhat, Truffle, and Node.js, to create smart contracts. Additionally, the establishment of a blockchain node can be done with Ganache or by connecting it to a testnet, like Rinkeby or Ropsten.Step:4 Make the contracts for smart contractsMake a smart contract that shows which user account is in charge of managing transaction volume and user authentication. It is also advisable to have a central point contract that facilitates communication with account contracts. Utilise proxy patterns to incorporate security measures for contract upgrades.Step:5 DesignAim for straightforward, user-friendly designs while considering the diverse user bases. Success results from keeping people interested in the wallet. The design is shared for approval when it has been created.Step:6 Security Audits and TestingThe smart contracts will undergo extensive testing following the development of the solution. Testing is done in various settings to check for mistakes and defects. For smart contract assessments, vulnerability detection, and remediation, third-party auditors are hired.Step:7 Install on the MainnetThe system is ready for post-launch post-testing and Mainnet security assessments. This stage involves configuring the server environment and deploying the code into the production environment.Step:8 Upkeep and ModificationsExamine the systems for problems, and where necessary, apply upgrades. Assist users who may have queries or encounter problems when using the wallet. As a result, the solution will become reliable and capable over time.Step:9 Marketing & Getting User FeedbackTo attract consumers' attention, the solution is advertised through various means. This covers joint ventures and collaborations, recommendations, social media marketing, and YouTube advertising. The solution is improved by the collection of user input.Also, Check | How to Build a Cryptocurrency Wallet App Like ExodusBuilding a Multi-Chain Account Abstraction WalletExample: - Set Up Hardhat:-If you haven't set up a Hardhat project yet, you can do so with the following commands:mkdir MultiChainWallet cd MultiChainWallet npm init -y npm install --save-dev hardhat npx hardhatAdd the ContractCreate a file named MultiChainWallet.sol in the contracts directory and paste the contract code:// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IERC20 { function transfer(address recipient, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); function balanceOf(address account) external view returns (uint256); } contract MultiChainWallet { mapping(address => mapping(address => uint256)) private balances; mapping(address => bool) private wallets; event WalletCreated(address indexed owner); event Deposit(address indexed user, address indexed token, uint256 amount); event Withdraw(address indexed user, address indexed token, uint256 amount); modifier onlyWallet() { require(wallets[msg.sender], "Wallet does not exist"); _; } function createWallet() external { require(!wallets[msg.sender], "Wallet already exists"); wallets[msg.sender] = true; emit WalletCreated(msg.sender); } function deposit(address token, uint256 amount) external onlyWallet { require(amount > 0, "Invalid amount"); IERC20(token).transferFrom(msg.sender, address(this), amount); balances[msg.sender][token] += amount; emit Deposit(msg.sender, token, amount); } function withdraw(address token, uint256 amount) external onlyWallet { require(balances[msg.sender][token] >= amount, "Insufficient balance"); balances[msg.sender][token] -= amount; IERC20(token).transfer(msg.sender, amount); emit Withdraw(msg.sender, token, amount); } function getBalance(address token) external view onlyWallet returns (uint256) { return balances[msg.sender][token]; } } contract MockERC20 is IERC20 { string public name; string public symbol; uint8 public decimals = 18; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; constructor(string memory _name, string memory _symbol, address initialAccount, uint256 initialBalance) { name = _name; symbol = _symbol; _balances[initialAccount] = initialBalance; } function transfer(address recipient, uint256 amount) external override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) { require(amount <= _allowances[sender][msg.sender], "Allowance exceeded"); _approve(sender, msg.sender, _allowances[sender][msg.sender] - amount); _transfer(sender, recipient, amount); return true; } function balanceOf(address account) external view override returns (uint256) { return _balances[account]; } function approve(address spender, uint256 amount) external returns (bool) { _approve(msg.sender, spender, amount); return true; } function allowance(address owner, address spender) external view returns (uint256) { return _allowances[owner][spender]; } function _transfer(address sender, address recipient, uint256 amount) internal { require(sender != address(0), "Transfer from the zero address"); require(recipient != address(0), "Transfer to the zero address"); require(_balances[sender] >= amount, "Insufficient balance"); _balances[sender] -= amount; _balances[recipient] += amount; } function _approve(address owner, address spender, uint256 amount) internal { require(owner != address(0), "Approve from the zero address"); require(spender != address(0), "Approve to the zero address"); _allowances[owner][spender] = amount; } } You may also like | What is the Cost of Creating a Crypto Wallet App in 2024Create the Deployment Script:Create a new file named deploy.js in the scripts directory and add the following code:// scripts/deploy.jsasync function main() { const MockERC20 = await ethers.getContractFactory("MockERC20"); const mockToken = await MockERC20.deploy("Mock Token", "MTK", "0xYourAddressHere", ethers.utils.parseEther("1000")); await mockToken.deployed(); console.log("MockERC20 deployed to:", mockToken.address); } // Execute the script main() .then(() => process.exit(0)) .catch((error) => { console.error(error); process.exit(1); }); Configure Hardhat NetworkEdit the hardhat.config.js file to configure the network you want to deploy to (for example, the Rinkeby testnet or the local Hardhat network):require('@nomiclabs/hardhat-waffle'); module.exports = { solidity: "0.8.0", networks: { rinkeby: { url: 'https://rinkeby.infura.io/v3/YOUR_INFURA_PROJECT_ID', accounts: [`0x${YOUR_PRIVATE_KEY}`] } } }; Create the Test File Create a new file named MultiChainWallet.test.js in the test directory and add the following test cases:// test/MultiChainWallet.test.js// test/MockERC20.test.jsconst { expect } = require("chai"); const { ethers } = require("hardhat"); describe("MockERC20", function () { let mockToken; let owner; let addr1; let addr2; beforeEach(async function () { const MockERC20 = await ethers.getContractFactory("MockERC20"); [owner, addr1, addr2] = await ethers.getSigners(); mockToken = await MockERC20.deploy("Mock Token", "MTK", owner.address, ethers.utils.parseEther("1000")); await mockToken.deployed(); }); describe("Deployment", function () { it("Should set the correct name and symbol", async function () { expect(await mockToken.name()).to.equal("Mock Token"); expect(await mockToken.symbol()).to.equal("MTK"); }); it("Should assign the initial balance", async function () { const balance = await mockToken.balanceOf(owner.address); expect(balance).to.equal(ethers.utils.parseEther("1000")); }); }); describe("Transactions", function () { it("Should transfer tokens between accounts", async function () { await mockToken.transfer(addr1.address, ethers.utils.parseEther("100")); const addr1Balance = await mockToken.balanceOf(addr1.address); expect(addr1Balance).to.equal(ethers.utils.parseEther("100")); }); it("Should approve tokens for spending", async function () { await mockToken.approve(addr1.address, ethers.utils.parseEther("50")); const allowance = await mockToken.allowance(owner.address, addr1.address); expect(allowance).to.equal(ethers.utils.parseEther("50")); }); it("Should transfer tokens from one account to another", async function () { await mockToken.approve(addr1.address, ethers.utils.parseEther("50")); await mockToken.connect(addr1).transferFrom(owner.address, addr2.address, ethers.utils.parseEther("50")); const addr2Balance = await mockToken.balanceOf(addr2.address); expect(addr2Balance).to.equal(ethers.utils.parseEther("50")); }); }); });Also, Read | How to Build a Real-Time Wallet TrackerDeploy the ContractTo deploy the contract, run the following command in your terminal:npx hardhat run scripts/deploy.js --network <network_name>Verify the Deployment:-Once deployed, you should see the contract address in the terminal output. You can verify the deployment on Etherscan (for public networks) or through your local Hardhat node.Overview of the Above Contract:-Deposit Function: The wallet allows users to deposit Ether, with the balance being linked to a particular chain ID.Withdraw Function: Users are able to take their remaining Ether balance for a certain chain out. Execute Function: Using a signature-based verification system, this function enables the owner to carry out transactions on other contracts.Events: For tracking purposes, send out events for deposits, withdrawals, and completed transactions.Explanation of the TestsDeposit Tests: Tests that users can deposit Ether and that their balance is updated accordingly. Checks that the Deposited event is emitted.Withdraw Tests: Ensures that users can withdraw their Ether. Validates that trying to withdraw more than the balance reverts the transaction. Checks that the Withdrawn event is emitted.Execute Tests: Validates that the owner can successfully execute a transaction. Tests that an invalid signature reverts the transaction.Interactions Across Chains: Cross-chain interactions are not specifically handled by this contract. You could utilise bridging mechanisms like Wormhole or LayerZero, oracles, to establish communication between various chains in order to do this.Security: Whenever you work with different chains, make sure to audit your contracts and take into account possible attack routes.Gas Efficiency: When building your functions, especially for cross-chain calls, keep gas expenses in mind.Also, Check | Create an Externally Owned Wallet using Web3J and Spring BootTesting and Deployment:-You can utilise test networks for the individual chains you wish to support together with frameworks like Hardhat or Truffle to deploy and test this contract.Boost Functionality: Include extra features such as role-based access control, support for ERC20 tokens, and recovery methods.Cross-Chain Communication: To move assets between chains, investigate and put into practice cross-chain protocols.User Interface: Using Web3.js or Ethers.js frameworks, create a front-end interface for interacting with the wallet. This ought to provide you with a basic idea of how to construct a Solidity wallet that abstracts multiple chains of accounts. Be sure to modify and enlarge the code in accordance with the specifications of your project!Monetary Benefits of Investing in Account Abstraction Wallet:-Cost is a significant component of Account Abstraction wallet development. It is impacted by numerous factors that bring these apps to life. Let us spotlight these factors in detail:Development Team SizeThe expertise and experience of the development team affect the wallet cost. Hire a skilled team with Blockchain background and consider the cost of developers, designers, blockchain experts and security professionals.Features and ComplexityThe features integrated within the application have a direct influence on the cost. The charges of basic wallets are less, while the advanced ones escalate the cost.Security MeasuresThe significance of powerful security mechanisms can't be understated. The higher the security, the higher the development charges. Make sure that the advanced security mechanisms are integrated, which is a significant investment but gives you peace of mind.Legal and Compliance CostsAddressing complaint measures involves legal consultations and ensuring that the application adheres to local and global regulations. These costs are included in the overall budget.Also, Discover | How to Sign Ledger using Solana Wallet AdapterAccount Abstraction Wallets DrawbacksComplexity: Compared to standard wallets, the architecture may be more intricate, which might increase the likelihood of errors or implementation flaws.Experience of the User: Those who are only familiar with conventional wallets may find it difficult to grasp new ideas like transaction signature off-chain.Difficulties with Onboarding: It might be difficult for novice users to set up and use these wallets efficiently.Smart Contract Weaknesses: The usage of smart contracts exposes users to more risks, including those related to reentrancy attacks, vulnerabilities, and exploits that might result in financial loss.Signature Management: Insecure implementation of off-chain signing techniques may result in compromised private keys.Reliance on Oracles and Bridges: Multi-chain functionality often depends on external oracles and bridging services, which can introduce additional points of failure.Potential Latency: Cross-chain transactions might be slower due to the need for confirmations and interactions with multiple networks.KYC/AML Concerns: Implementing features like KYC for account abstraction wallets could complicate user privacy and lead to regulatory scrutiny.Compliance Complexity: Ensuring compliance across multiple jurisdictions can be challenging and resource-intensive.Interoperability Challenges: Different chains may have varying standards and functionalities, complicating interoperability and the overall user experience.Limited Support: Not all decentralized applications (dApps) may support account abstraction wallets, limiting their usability.If you are looking for assistance to build your blockchain-based project, connect with our skilled blockchain developers to get started.

Technology: SMART CONTRACT , REDIS more Category: Blockchain

Kapil Dagar

01 Oct 2024

ERC 4337 : Account Abstraction for Ethereum Smart Contract Wallets Understanding Account Abstraction on Ethereum for Smart Contract WalletsA novel concept in blockchain, account abstraction aims to improve and harmonize user account functionality in decentralized systems. Contract wallets, also known as smart contract accounts, can replace traditional externally held accounts thanks to account abstraction and smart contract development. A contract wallet can be controlled by a single key, multiple keys, or even a complex system encoded into the contract itself. This opens up numerous possibilities and benefits for Ethereum and other blockchain networks. Account abstraction allows for more flexible and secure management of contract wallets compared to traditional externally held accounts. For more about blockchain, Ethereum, and smart contracts, visit our smart contract development services.In the Ethereum network, two types of accounts currently exist:Externally Owned Accounts (EOAs): controlled by private keys and typically of specific people or organizations.Contract Accounts: smart contracts whose code is run according to predetermined logic.Account abstraction seeks to unify the two types of Ethereum accounts:This implies that smart contracts can now manage and carry out transactions on behalf of users rather than exclusively depending on private keys (as with EOAs), providing users with more flexibility and opening the door to new features like customizable security models, automated and gasless transactions, meta-transactions, and improved privacy. These developments streamline user interactions and increase the Ethereum ecosystem's potential.Also, Read | How to Create an NFT Rental Marketplace using ERC 4907Why do we need Account Abstraction ?The current configuration of the Ethereum network has several drawbacks:Security Risks: Due to their binary structure, private keys can be lost or stolen, which can result in an irreversible loss of money.User Experience: For new users who could find wallet security and gas principles confusing, EOAs demand private keys and gas costs in Ether, which causes friction.Hazards to Security: Due to their binary structure, private keys can be lost or stolen, which can result in an irreversible loss of money.Limited Features: Advanced features like multi-signature wallets and daily transaction restrictions cannot be implemented on EOAs due to their lack of programmability.By addressing these problems, account abstraction seeks to enhance the functionality, security, and usability of the network.Also, Read | A Guide to Implementing NFT Royalties on ERC-721 & ERC-1155Approaches to Implement Account Abstraction:Protocol-Level ChangesIt entails modifying the Ethereum protocol to allow native wallets for smart contracts. Consensus is required for this strategy throughout the Ethereum network.Layer 2 SolutionsLayer 2 networks provide the ability to offload transaction processing and implement unique transaction validation procedures.ERC 4337 (Ethereum Request for Comments)It suggests implementing account abstraction just at the application level, eliminating the need for protocol modifications.Also, Read | How to Create and Deploy a Token Bound Account | ERC-6551What is ERC 4337?A new transaction handling mechanism called UserOperation objects is introduced in ERC 4337. By signing UserOperation objects, which bundlers aggregate and transmit to the network, users avoid submitting transactions straight to the Ethereum blockchain. Without relying on the current transaction flow, this method enables smart contract wallets to safely start transactions. Implementation of ERC 4337:A number of essential elements are involved in the Solidity implementation of ERC 4337 (Account Abstraction), which combined allow for flexible and intuitive interactions with smart contracts. These are the primary elements to pay attention to:1. UserOperation StructPurpose: Represents a single user operation with all necessary information.Key Fields:sender: The address of the user or wallet executing the operation.nonce: To prevent replay attacks and track the order of operations.callData: The encoded data for the function call.gasLimit: The maximum amount of gas that can be used for the operation.maxFeePerGas & maxPriorityFeePerGas: Control over gas fees.You may also like | How to Create an ERC 721C Contract// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract UserOperationExample { struct UserOperation { address sender; // Address of the user sending the operation uint256 nonce; // Unique nonce to prevent replay attacks bytes callData; // Encoded data for the function call uint256 gasLimit; // Maximum gas limit for the operation uint256 maxFeePerGas; // Maximum fee per gas unit the user is willing to pay uint256 maxPriorityFeePerGas; // Max priority fee per gas } // Example function to demonstrate the use of UserOperation function exampleFunction(UserOperation calldata userOp) external { // Validate the user operation (you would typically check nonce, gas limits, etc.) require(userOp.sender != address(0), "Invalid sender"); require(userOp.gasLimit > 0, "Gas limit must be greater than zero"); // Here you would implement the logic to execute the operation (bool success, ) = userOp.sender.call{gas: userOp.gasLimit}(userOp.callData); require(success, "Operation failed"); // You could also emit an event here for tracking purposes } }Also, Discover | How to Create and Deploy an ERC404 token contract2. EntryPoint ContractPurpose: Central contract that receives user operations and executes them.Key Functions:executeUserOperation: Validates and executes the user operation, checking the sender's nonce, ensuring gas limits, and processing the call data.Security Checks: Implement checks to prevent issues like underflow/overflow, invalid addresses, and ensure gas payment.// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract EntryPoint { event UserOperationExecuted(address indexed sender, bytes callData); event UserOperationFailed(address indexed sender, bytes callData, string reason); // This mapping tracks the nonce for each user to prevent replay attacks mapping(address => uint256) public nonces; function executeUserOperation(UserOperation calldata userOp) external { // Validate the user operation require(userOp.sender != address(0), "Invalid sender"); require(userOp.nonce == nonces[userOp.sender], "Invalid nonce"); require(userOp.gasLimit > 0, "Gas limit must be greater than zero"); // Update the nonce nonces[userOp.sender]++; // Execute the operation (bool success, bytes memory returnData) = userOp.sender.call{gas: userOp.gasLimit}(userOp.callData); if (success) { emit UserOperationExecuted(userOp.sender, userOp.callData); } else { emit UserOperationFailed(userOp.sender, userOp.callData, _getRevertMsg(returnData)); } } // Helper function to extract revert reason function _getRevertMsg(bytes memory returnData) internal pure returns (string memory) { if (returnData.length < 68) return "Transaction reverted silently"; assembly { returnData := add(returnData, 0x04) } return abi.decode(returnData, (string)); } }Also, Discover | ERC 3643 A Protocol for Real World Asset Tokenization3. User Wallet ContractPurpose: Acts as the user's wallet to create and submit user operations.Key Functions:submitUserOperation: Collects user operation parameters and sends them to the Entry Point.Nonce Management: Increments the nonce after a successful operation to prevent replay attacks. // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./EntryPoint.sol"; // Import the EntryPoint contract contract UserWallet { address public entryPoint; // Address of the EntryPoint contract uint256 public nonce; // Nonce for tracking user operations constructor(address _entryPoint) { entryPoint = _entryPoint; // Set the EntryPoint contract address } // Function to submit a user operation function submitUserOperation( bytes calldata callData, uint256 gasLimit, uint256 maxFeePerGas, uint256 maxPriorityFeePerGas ) external { // Create the UserOperation struct UserOperation memory userOp = UserOperation({ sender: address(this), nonce: nonce, callData: callData, gasLimit: gasLimit, maxFeePerGas: maxFeePerGas, maxPriorityFeePerGas: maxPriorityFeePerGas }); // Submit the user operation to the Entry Point EntryPoint(entryPoint).executeUserOperation(userOp); // Increment the nonce for the next operation nonce++; } // Example function to demonstrate a callable function from the wallet function exampleFunction(uint256 value) external { // Implementation of the function logic } }Also, Check | A Guide to Gasless ERC20 Token Transfer4. Gas Payment MechanismPurpose: Determines how the gas for executing user operations is paid.Considerations:You might want to allow users to pay gas fees in tokens or implement a mechanism for sponsor payments (where another entity pays the gas). // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; contract EntryPoint { event UserOperationExecuted(address indexed sender, bytes callData); event UserOperationFailed(address indexed sender, bytes callData, string reason); mapping(address => uint256) public nonces; // Function to execute user operation with gas payment function executeUserOperation( UserOperation calldata userOp, address paymentToken, uint256 paymentAmount ) external payable { require(userOp.sender != address(0), "Invalid sender"); require(userOp.nonce == nonces[userOp.sender], "Invalid nonce"); require(userOp.gasLimit > 0, "Gas limit must be greater than zero"); // Validate gas payment if (paymentToken == address(0)) { // Pay with Ether require(msg.value >= paymentAmount, "Insufficient Ether sent"); } else { // Pay with ERC-20 token require(IERC20(paymentToken).transferFrom(msg.sender, address(this), paymentAmount), "Token transfer failed"); } nonces[userOp.sender]++; (bool success, bytes memory returnData) = userOp.sender.call{gas: userOp.gasLimit}(userOp.callData); if (success) { emit UserOperationExecuted(userOp.sender, userOp.callData); } else { emit UserOperationFailed(userOp.sender, userOp.callData, _getRevertMsg(returnData)); } } function _getRevertMsg(bytes memory returnData) internal pure returns (string memory) { if (returnData.length < 68) return "Transaction reverted silently"; assembly { returnData := add(returnData, 0x04) } return abi.decode(returnData, (string)); } }5. Account Abstraction WalletPurpose:To manage user actions, an Entry Point contract communicates with the Abstracted Account Wallet, which functions as a user-defined wallet. By offering a means of verifying and carrying out these procedures, it guarantees that activities may only be carried out by authorized users. // SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.9; import "./library/UserOperation.sol"; import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; contract AbstractedAccountWallet { using ECDSA for bytes32; uint256 public constant SIG_VALIDATION_FAILED = 1; uint256 public constant NONCE_VALIDATION_FAILED = 2; uint256 public constant VALIDATION_SUCCESS = 0; address public owner; uint256 public nonce; address public entryPoint; // Events for logging important actions event ExecutedOperation(address indexed sender, uint256 value, bytes data); constructor(address _entryPoint) { owner = msg.sender; nonce = 0; entryPoint = _entryPoint; } // Modifier to check if the caller is the owner of the contract modifier onlyOwner() { require(msg.sender == owner, "You are not the owner"); _; } modifier onlyEntryPoint() { require( msg.sender == entryPoint, "Only EntryPoint can call this function" ); _; } // Function to validate a user-defined operation function validateOp( UserOperation calldata op, uint256 requiredPayment ) public returns (uint256) { // Send requiredPayment to EntryPoint if (requiredPayment != 0) { payable(entryPoint).transfer(requiredPayment); } // Check nonce require(op.nonce == nonce++, "Invalid nonce"); // Check signature if ( owner != getHash(op).toEthSignedMessageHash().recover( // op.signature[32:] op.signature ) ) { return SIG_VALIDATION_FAILED; } else { // return uint256(bytes32(op.signature[0:32])); return VALIDATION_SUCCESS; } } function getHash( UserOperation memory userOp ) public view returns (bytes32) { return keccak256( abi.encode( bytes32(block.chainid), userOp.sender, userOp.nonce, keccak256(userOp.initCode), keccak256(userOp.callData), userOp.callGasLimit, userOp.verificationGasLimit, userOp.preVerificationGas, userOp.maxFeePerGas, userOp.maxPriorityFeePerGas, keccak256(userOp.paymasterAndData), entryPoint // uint256(bytes32(userOp.signature[0:32])) ) ); } }You may also like | How to Create an ERC 721 NFT TokenA recent breakthrough: EIP-4337Since the account abstraction effort moved to a different strategy, which was unveiled in EIP-4337 in late 2021, both EIP-2938 and EIP-3074 are presently dormant. Building on the idea of a smart contract wallet is the goal of the new strategy.However, remember that we already mentioned that the lack of proper infrastructure makes smart contract wallets challenging to use? Nevertheless, EIP-4337 seeks to address that without altering the L1 protocol in the process.The proposal introduces a higher-level mempool that operates with a new object called UserOperations. Instead of traditional transactions, users will send UserOperations to this mempool. Validators then select these UserOperations, bundle them into a transaction, and submit them to a specialized smart contract called the EntryPoint contract. This contract manages transaction execution and validator rewards.The method outlined in EIP-4337 simplifies the process for developers to create custom smart contract wallets.Also, Know | Create a Simple Dividend ERC20 tokenConclusion of Account Abstraction Using ERC 4337:Account abstraction and ERC 4337 are two progressive approaches to Ethereum's development. This strategy is well-positioned to promote the wider use of blockchain technology and decentralised apps by giving priority to user experience, flexibility, and security, so making them more accessible and useful for regular users. The ideas and applications resulting from ERC 4337 will probably influence the direction of decentralised finance in the future and beyond as the ecosystem develops. In case you are looking to build your project using emerging ERC standards, connect without our skilled Solidity developers to get started.

Technology: SMART CONTRACT , ETHERJS more Category: Blockchain

Yogesh Sahu

01 Oct 2024

How to Build a Cross-Chain Bridge Using Solidity and Rust The capacity to transfer assets across networks effortlessly is more important than ever in the ever-changing world of blockchain development. Envision a bridge that unites the Ethereum and Solana worlds, letting tokens move freely while upholding security and openness. In this project, we use the robust programming languages Solidity and Rust to set out on the task of creating a cross-chain bridge. Through utilizing Rust's efficiency for Solana's on-chain logic and Solidity's capabilities for Ethereum smart contracts, our goal is to provide a solid framework that makes token exchanges simple. Whether you're a crypto enthusiast excited to explore new possibilities or a developer trying to improve interoperability, this guide will take you through all the necessary steps to realize this ambitious aim. Now let's dive in.PrerequisitesProgrammingLanguages:Solidity, Javascript/Typescript, and RustIDE:VS-Code and any preferred IDELibraries:ETH:Hardhat, Ethers, Axios, OpenzepplinSOL:Solana Web3.js, Solana Spl-tokenAlso, Explore | How To Build "Buy Me a Coffee" DeFi dApp Using SolidityHow to Build a Cross-Chain Bridge Using Solidity and RustIt's preferred that you setup 3 projects, separately for:I) Ethereum's ERC-20 Token Smart Contract:You'll need to setup node.js, solidity and hardhat in your IDE/ system. So, we'll begin with setting up hardhat code, for example "click-here". Here's the code for the ERC-20 Token using Openzepplin's library.code.................................................................................................. // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; contract Testtoken is ERC20, Ownable { event BurnAndMoveToSolana(address indexed user, string solanaAddress, uint256 amount); event MintFromSolana(address indexed user, uint256 amount); address public relayer; constructor() ERC20("EthereumToken", "ETHR") Ownable(msg.sender){ _mint(msg.sender, 1000000 * (10 ** decimals()));// change amount as per your understanding } modifier onlyRelayer() { require(msg.sender == relayer, "Not authorized"); _; } function setRelayer(address _relayer) external onlyOwner { relayer = _relayer; } function burnAndMoveToSolana(uint256 amount, string memory solanaAddress) external {// main transfering function _burn(msg.sender, amount); emit BurnAndMoveToSolana(msg.sender, solanaAddress, amount); } function mintFromSolana(address to, uint256 amount) external onlyRelayer { _mint(to, amount); emit MintFromSolana(to, amount); } event TokensBurned(address indexed from, address indexed solanaAddress, uint256 amount); }You may also like | Building a Decentralized Voting System with Solidity and Hardhat2) Solana's SPL Token Program:You'll need to setup node.js, Solana, and Rust in your IDE/ system. To begin with, we'll set-up a empty solana-sdk code. Here's the full code/implementation for the SPL Token using Solana-web3.js & Solana spl-token.code................................................................................................. const { Connection, Keypair, PublicKey, clusterApiUrl, LAMPORTS_PER_SOL } = require('@solana/web3.js'); const { createMint, getOrCreateAssociatedTokenAccount, mintTo, getAccount, burn } = require('@solana/spl-token'); async function mintAndBurnTokens(connection, fromWallet, tokenAccount, mint, amountToMint, amountToBurn, ethAddress) { await mintTo( connection, fromWallet, mint, tokenAccount.address, fromWallet.publicKey, amountToMint ); console.log(`Minted ${amountToMint / (10 ** 9)} tokens to your associated token account.`); const tokenAccountBalance = await getAccount(connection, tokenAccount.address); console.log(`Token account balance after minting: ${Number(tokenAccountBalance.amount) / (10 ** 9)} tokens`); if (Number(tokenAccountBalance.amount) < amountToBurn) { console.log(`Insufficient funds. Current balance: ${Number(tokenAccountBalance.amount) / (10 ** 9)} tokens.`); return; } await burn( connection, fromWallet, tokenAccount.address, mint, fromWallet.publicKey, amountToBurn ); console.log(`Burned ${amountToBurn / (10 ** 9)} tokens from ${fromWallet.publicKey} and moving to Ethereum wallet ${ethAddress}.`); console.log(`Relaying burn event to Ethereum relayer for Ethereum wallet: ${ethAddress}, amount: ${amountToBurn / (10 ** 9)}.`); } (async () => { const fromWallet = Keypair.fromSecretKey(new Uint8Array([your,secret,keypair])); const ethAddress = "0xyourAddress";//add your eth wallet address const mintAmount = 100000 * 10 ** 9;// amount of SPL tokens to mint const burnAmount = 1000 * 10 ** 9;// amount of SPL tokens to burn/transfer const connection = new Connection(clusterApiUrl('devnet'), 'confirmed');// put your preferred cluster console.log('Creating SPL token...'); const mint = await createMint( connection, fromWallet, fromWallet.publicKey, null, 9 ); const fromTokenAccount = await getOrCreateAssociatedTokenAccount( connection, fromWallet, mint, fromWallet.publicKey ); console.log('Minting tokens...'); await mintAndBurnTokens(connection, fromWallet, fromTokenAccount, mint, mintAmount, burnAmount, ethAddress); console.log(`View token account on Solana Explorer: https://explorer.solana.com/address/${fromTokenAccount.address}?cluster=devnet`); })(); ////////////////////////////////////////////////////////////////////////Also, Read | How To Create a Daily Game Reward System in Solidity3) Relayer-Bridge Project:In order to facilitate safe and transparent token transfers between two blockchains, a relayer-bridge project serves as an essential bridge. Using smart contracts and event listeners, the relayer in the Ethereum and Solana context watches on particular occurrences on one blockchain, like an Ethereum token burn. When the relayer notices one of these events, it sends the required information—such as the recipient's address and the quantity of tokens—to the other chain so that the corresponding action—like minting the tokens on Solana—can take place there. In order to preserve network balance, this bi-directional communication makes sure that tokens burned on one chain are minted on the other. In order to smoothly connect the two ecosystems, the relayer's job is to validate and relay these transactions without sacrificing security or speed.Here's the Code for the Relayer-Bridge :code.................................................................................................. const WebSocket = require("ws"); const { ethers } = require("ethers"); const fs = require("fs"); require('dotenv').config(); const wsUrl = "wss://api.devnet.solana.com";//your desired network const connection = new WebSocket(wsUrl); const provider = new ethers.WebSocketProvider(process.env.ETH_WSS_URL); const wallet = new ethers.Wallet(process.env.ETH_PRIVATE_KEY, provider); const contractAddress = process.env.ETH_CONTRACT_ADDRESS; const abi = JSON.parse(fs.readFileSync("./path_to_your/eth_contract_abi.json")); const contract = new ethers.Contract(contractAddress, abi, wallet); connection.on("open", () => { console.log("Connected to Solana WebSocket"); const subscriptionMessage = JSON.stringify({ jsonrpc: "2.0", id: 1, method: "logsSubscribe", params: [ { mentions: [""],// Your SPL token address }, { commitment: "finalized", }, ], }); connection.send(subscriptionMessage); }); connection.on("message", async (data) => { const response = JSON.parse(data); if (response.method === "logsNotification") { const logData = response.params.result; // Check if the log indicates a burn if (isBurnLog(logData)) { const amountBurned = extractBurnAmount(logData); console.log(`Burn detected: ${amountBurned} tokens`); await mintTokens(amountBurned); } } else { console.log("Received message:", response); } }); connection.on("close", () => { console.log("Connection closed"); }); connection.on("error", (error) => { console.error("WebSocket error:", error); }); // Function to Check the log data structure to confirm it's a burn event function isBurnLog(logData) { return logData && logData.err === null && logData.logs && logData.logs.some(log => log.includes("burn")); } // Function to extract the amount burned from the log data function extractBurnAmount(logData) { const amountLog = logData.logs.find(log => log.includes("burn")); if (amountLog) { const amount =/* logic to parse your burn amount format */; return parseFloat(amount);// Return the amount as a number } return 0; } // Function to mint tokens on Ethereum async function mintTokens(amount) { try { const tx = await contract.mint(wallet.address, ethers.utils.parseUnits(amount.toString(), 18)); console.log(`Mint transaction sent: ${tx.hash}`); await tx.wait(); console.log("Minting successful"); } catch (error) { console.error("Minting failed:", error); } } /////////////////////////////////////////////////////////////////////////This part of the relayer works for the transfer of SPL tokens to the ERC-20 tokens on Ethereum. Similarly, we can perform the transfer of ERC-20 tokens to SPL Tokens on the Solana blockchain, burn them, and its functionality will trigger the SPL Token's mint function to complete the cross-chain transaction.Also, Discover | How to Create a MultiSig Wallet in SolidityConclusionIn conclusion, creating a relayer-equipped cross-chain bridge enables users to transfer assets between Ethereum and Solana with ease, opening up a world of decentralised opportunities. Utilising Solidity and Rust's respective advantages, you can build a scalable, secure solution that connects two robust blockchain ecosystems. This project shapes the future of decentralised finance by paving the ground for true blockchain interoperability with the correct tools and knowledge. Connect with our skilled Solidity developers to bring your blockchain-related vision into reality.

Technology: MEAN , PYTHON more Category: Blockchain

Ashish Gushain

30 Sep 2024

Building a Custom Blockchain Consensus Mechanism Blockchain technology relies on consensus algorithms to validate transactions and maintain network integrity. While public blockchains use popular algorithms like Proof of Work (PoW) or Proof of Stake (PoS), private blockchains often require a custom consensus mechanism tailored to their specific needs. In this blog, we'll explore how to build a custom consensus algorithm for a private blockchain, ensuring it's secure, efficient, and meets your business requirements. For more about blockchain, visit our blockchain development services.What is a Consensus Algorithm?A consensus algorithm is a mechanism that allows all participants in a blockchain network to agree on the state of the ledger. This agreement ensures that the data in the blockchain is accurate and prevents fraudulent transactions or data tampering.Why Build a Custom Consensus Algorithm for a Private Blockchain?Control: Private blockchains are often used by organizations that want control over who can participate in the network.Efficiency: Custom algorithms can be designed to be more efficient for smaller networks, reducing transaction confirmation times.Security: Tailored algorithms provide an extra layer of security by addressing specific threats relevant to the private blockchain environment.Also, Check | How to Create Your Own Private Blockchain using CosmosChoosing a Suitable Consensus AlgorithmBefore we start building, let's briefly discuss different consensus algorithms that can inspire your custom model:Proof of Authority (PoA):Only trusted nodes can validate transactions, suitable for private networks with a small number of participants.Raft Consensus:A leader-based approach where one node is elected as the leader to manage transactions.Practical Byzantine Fault Tolerance (PBFT):Handles faulty nodes and works efficiently in networks with up to one-third of malicious participants.Also, Explore | How to Utilize Rollup-as-a-Service for Maximum EfficiencyStep-by-Step Guide to Building the Custom Consensus AlgorithmStep 1: Define the Blockchain StructureBlock Class class Block { constructor(index, timestamp, data, previousHash = '') { this.index = index; // Position of the block in the chain this.timestamp = timestamp; // The time when this block was created this.data = data; // Information to be stored in the block (e.g., transactions) this.previousHash = previousHash; // Hash of the previous block in the chain this.hash = this.calculateHash(); // Unique identifier generated for this block this.validator = null; // The validator node that approves this block } delves calculateHash() { return CryptoJS.SHA256( this.index + this.timestamp + JSON.stringify(this.data) + this.previousHash ).toString(); } }Detailed Breakdown:Each block has an index, timestamp, data, previousHash, hash, and validator. The calculateHash() function combines the block's properties and generates a unique hash using the SHA-256 algorithm. This hash ensures that even a small change in the block's data will result in a completely different hash, making the blockchain tamper-resistant.Key Point: In blockchain, the hash acts like a digital fingerprint for each block. It's crucial because it ensures that data within the block hasn't been altered.Also, Read | How ShadCN is better than AndDBlockchain Class class Blockchain { constructor() { this.chain = [this.createGenesisBlock()]; // Initialize the blockchain with the first block this.validators = ['Node1', 'Node2', 'Node3']; // Nodes authorized to validate new blocks } createGenesisBlock() { return new Block(0, '01/01/2024', 'Genesis Block', '0'); // First block with no previous hash } getLatestBlock() { return this.chain[this.chain.length - 1]; // Fetch the last block added to the chain } addBlock(newBlock) { newBlock.previousHash = this.getLatestBlock().hash; // Connect the new block to the previous one newBlock.hash = newBlock.calculateHash(); // Calculate the hash based on the new block's data // Apply the consensus mechanism newBlock.validator = this.selectValidator(); if (this.isBlockValid(newBlock)) { this.chain.push(newBlock); // Add the block to the chain if valid console.log(`Block approved by: ${newBlock.validator}`); } else { console.log('Block rejected'); } } isBlockValid(block) { // Ensure the selected validator is authorized return this.validators.includes(block.validator); } selectValidator() { // Randomly choose a validator to approve the block const selectedValidator = this.validators[Math.floor(Math.random() * this.validators.length)]; return selectedValidator; } isChainValid() { for (let i = 1; i < this.chain.length; i++) { const currentBlock = this.chain[i]; const previousBlock = this.chain[i - 1]; // Check the integrity of the block if (currentBlock.hash !== currentBlock.calculateHash()) return false; // Verify the chain linkage if (currentBlock.previousHash !== previousBlock.hash) return false; } return true; } }Genesis Block:The genesis block is the first block in the blockchain. It's created with index = 0 and has a previousHash of '0' because it doesn't have any predecessor.addBlock(newBlock):The addBlock function adds a new block to the blockchain, ensuring the chain's integrity by setting previousHash to the hash of the latest block.The selectValidator function randomly picks a validator node to approve the block. If approved by an authorized validator, the block is added to the blockchain.selectValidator():The selectValidator function represents the core of our Proof of Authority (PoA) consensus mechanism. Here, validators are chosen at random, but you can enhance this logic based on factors like node reputation or stake.isChainValid():This function verifies the integrity of the entire blockchain. It ensures that each block's hash matches the recalculated hash using calculateHash() and that previousHash correctly links to the preceding block.Important Concept: The blockchain maintains its integrity through these hashes. Any change to a block's data would alter its hash, breaking the chain's continuity and making tampering evident.You may also like | How to Swap Tokens on Uniswap V3Step 2: Testing the BlockchainLet's test our custom blockchain:let myBlockchain = new Blockchain(); myBlockchain.addBlock(new Block(1, '02/01/2024', { amount: 100 })); myBlockchain.addBlock(new Block(2, '03/01/2024', { amount: 200 })); console.log(JSON.stringify(myBlockchain, null, 4)); console.log('Is blockchain valid? ' + myBlockchain.isChainValid());Explanation:We create an instance of Blockchain and add two blocks with transaction data { amount: 100 } and { amount: 200 }.Finally, we print the entire blockchain to see its structure and check its validity using isChainValid().Also, Discover | How to Develop a Layer 1 BlockchainEnhancing the Consensus Mechanism: VotingThe basic algorithm randomly selects a validator to approve a block. For more security, we introduced a voting mechanism where multiple validators decide.Voting Mechanism ExampleaddBlock(newBlock) { newBlock.previousHash = this.getLatestBlock().hash; newBlock.hash = newBlock.calculateHash(); let approvalCount = 0; // Simulate voting by validators this.validators.forEach(validator => { if (Math.random() > 0.4) { console.log(`${validator} approved the block`); approvalCount++; } else { console.log(`${validator} rejected the block`); } }); if (approvalCount >= 2) { this.chain.push(newBlock); console.log(`Block approved with ${approvalCount} votes`); } else { console.log('Block rejected'); } }Detailed Explanation:The block requires approval from at least 2 out of 3 validators. For each validator, there's a 60% chance of approving the block (Math.random() > 0.4). This mechanism ensures that no single validator can make decisions, providing greater security and trust.Also, Read | How to Access Private Data in Smart ContractsReal-World SignificancePrivate Network: In a corporate setting, this custom algorithm ensures that only authorized participants can validate transactions.Security: By implementing a voting mechanism, you reduce the risk of fraudulent activities, as multiple validators must approve each transaction.Scalability: Custom algorithms are optimised for small, private networks, reducing transaction confirmation times compared to public blockchains.Also, Check | How to Fork Ethereum with HardhatConclusionThis detailed explanation covers how to create a custom consensus algorithm tailored to a private blockchain using concepts from the Proof of Authority (PoA) and introduces voting mechanisms. By understanding how validators are selected, how blocks are validated, and how consensus is achieved, you now have a solid foundation for implementing custom blockchain solutions.You can expand this model into a more robust solution by implementing advanced features like reputation tracking, penalty mechanisms for dishonest nodes, or integrating cryptographic signatures for additional security.By experimenting with this code, you'll gain practical experience and develop a deeper understanding of consensus algorithms, preparing you for more advanced blockchain projects. Feel free to modify and experiment with the code to match your specific requirements!Key TakeawaysUnderstand your network's needs: Tailor your algorithm for efficiency, security, and control.Customize validation logic: Implement mechanisms like voting or reputation to enhance the consensus process.Experiment and iterate: Continuously test and refine your algorithm to achieve optimal performance.This blog should help you understand how to build a custom consensus algorithm and implement it in a private blockchain. Feel free to modify and enhance the code to suit your specific requirements. In case if you are looking for blockchain development services, connect with our skilled blockchain developers to get started.

Technology: MEAN , PYTHON more Category: Blockchain

Ashutosh Modanwal

28 Sep 2024

How to Create an NFT Rental Marketplace using ERC 4907 NFT Rental Marketplace Development using ERC 4907For a predetermined period, NFT owners can lease their tokens to third parties via ERC 4907. This functionality allows different players or users to temporarily use the NFTs in various applications, such as virtual real estate or gaming.The roles involved in this process include the Owner, who possesses the NFT; the User, who has the NFT in their wallet but is unable to sell or transfer it; and the "expires" function, which automatically ends usage without any further action required.A controller or operator role is assigned to oversee a large number of NFTs. While they can perform certain usage operations, individuals in these roles are unable to approve or transfer the NFT, unlike the owner.As an extension of ERC-721, the ERC 4907 standard introduces the dual roles of "owner" and "user" at the application layer. With an automatic "expires" mechanism that enforces the user's time-limited role, ERC 4907 simplifies NFT rentals. Thanks to this innovative feature, NFTs are automatically rentable; owners no longer need to manually revoke user privileges, saving time and avoiding additional on-chain transactions.The main challenge arises in usage rights management, making it essential to establish a unified standard to facilitate collaboration across all applications.You may also like | Why ERC-7007 is the Next Big Thing in BlockchainReal-world Applications and CollaborationsIt's becoming more and more common in the world of digital assets for non-fungible tokens (NFTs) to use the new Ethereum token standard, ERC 4907. In order to facilitate the temporary transfer of usage rights while maintaining ownership, it creates a new "user role" that is distinct from the "owner role." This is advantageous for subscription or rental models.In order to enable NFT rentals, Double Protocol has incorporated ERC 4907, allowing asset owners to lease without forfeiting ownership. This expands the utility of NFT and opens up new revenue streams. By including ERC 4907-based rental options, their relationship with Shardeum, a scalable smart contract platform, improves this strategy even further and fosters an NFT ecosystem that is more widely available.These collaborations highlight the real-world applications and transformative potential of ERC 4907, leading to a more dynamic digital asset market. As these partnerships develop, they promise significant changes in the landscape of NFTs and digital ownership.You may also like | How to Implement an On-Chain NFT AllowlistERC 4907 Use CasesGamingPlayers can rent rare in-game items or characters temporarily, allowing for access to premium content without a full purchase.Virtual Real EstateUsers can rent virtual plots of land or properties in metaverse platforms for specific events or time periods.Art and CollectiblesArtists can rent their works for exhibitions or shows, allowing more people to experience the art without ownership.Also, Explore | NFT ETFs | A Beginner's Guide to Investing in Digital AssetsRenting NFTs is a reasonable approachThe blockchain used the actual world as a source for the concept of renting. Instead of paying money to use something that the other party has, one party wants it but cannot afford to own it or doesn't need it. People adore the thought of living off the returns from their assets, exactly like in the real world. Rentable NFTs' primary concept is that they are a passive revenue source.What Advantages Does ERC 4907 Bring?Market LiquidityERC 4907 will enhance NFT renting and enable related derivatives across various use cases, such as gaming, art, and music. As the Metaverse and Web3 expand, more people will opt to rent NFTs instead of buying assets, increasing market liquidity over time.Easy Third-party IntegrationERC 4907, which establishes a single standard, will enhance collaboration and assist Ethereum's cross-platform ecosystem. This standard improves communication between all parties engaged in utility NFT leases for gaming, the metaverse, and membership cards by simplifying integration and reducing development costs.Moreover, third-party protocols employing ERC 4907 may oversee NFT usage rights without needing permission from the initial issuer. Others can swiftly do their own tasks when a project gives users this position. A PFP NFT, for instance, may be included in a platform that permits short-term rentals and simultaneously offers "rent-to-own" options via a mortgage platform without the original project's permission.Backward CompatibilityBy introducing an extended function set, the ERC 4907 standard can achieve full ERC-721 compatibility. Furthermore, there are a lot of parallels between the new functions provided in this standard and the current ERC-721 functionalities. This makes it possible for developers to embrace the new standard swiftly and simply. Future and current NFTs produced as standard ERC-721 can be wrapped to be compatible with ERC 4907 or upgraded to ERC 4907.Also, Read | How to Create a Compressed NFT on SolanaNeed of ERC 4907Renting Out AssetsOwners can lease their digital assets while maintaining ownership according to ERC 4907, which permits NFTs to be rented out. For asset holders, this means additional revenue prospects.Increased Digital Assets' ValueThis standard increases the functionality of NFTs and encourages their wider use across a range of industries, including gaming and virtual real estate, by allowing them to be rented.Innovative UsesIn the NFT space, the standard fosters innovation by creating opportunities for new applications including digital art exhibitions, virtual events, and game rentals.Also, Check | A Step-by-Step Tutorial of Building a Cross Chain NFT BridgeThings to Take Into Account When Implementing ERC 49071. In situations when the rental mechanism is not thoroughly monitored, users may take advantage of it. For example, they may rent an NFT for a very little time in order to swiftly transfer it without the owner's permission.2. Legal concerns may arise from renting digital assets, particularly if the NFTs include copyrighted content or other intellectual property. Users might have to make sure local laws are followed.Also, Discover | NFT-Based Loyalty Programs: Revamping Customer EngagementDetails of the ERC 4907 Interface:// function setUser(uint256 tokenId, address user, uint64 expires) external Main Purpose: Assigns a user to an NFT along with an expiration time. Parameter: tokenId: Unique Identifier of NFT user: the address of new user who can Use NFT exepires: duration until which the user can access the NFT Access-Control : Usually callable from an authorised address or the NFT owner. This guarantees that user access can only be modified byauthorised entities. // function userOf(uint256 tokenId) external view returns (address); Purpose: identifies the NFT's engaged user. Parameters: tokenId:Unique Identifier of NFT. Returns: The user's address. It returns the zero address (address(0)) in the event that the user has expired or if no user is allocated. // function userExpires(uint256 tokenId) external view returns (uint256); Purpose: retrieves the NFT user's expiration timestamp. Parameters: tokenId:Unique Identifier of NFT. Returns: The Unix timestamp indicating the expiration date of the user's access. There is no user when the value is 0. // Event UpdateUser(uint256 indexed tokenId, address indexed user, uint64 expires); Purpose: Emitted whenever a user is assigned or updated for an NFT. Parameters: tokenId: unique identifier of the NFT. user: Address of the new User. expires: The new expiration timestamp. Significance: Real-time tracking of user assignments is made possible by this event for both front-end apps and external services. Also, Read | NFT Domains | Revolutionizing Ownership in the Digital LandscapeERC 4907 Implementation// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; // ERC721 Implementation contract MyERC721Token { struct Token { address owner; address approved; } // Mapping from token ID to token information mapping(uint256 => Token) private _tokens; // Mapping from owner to number of tokens mapping(address => uint256) private _balances; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; // Counter for token IDs uint256 private _tokenIdCounter; // Events event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); event ApprovalForAll(address indexed owner, address indexed operator, bool approved); // Mint a new NFT function mint(address to) public { require(to != address(0), "Cannot mint to zero address"); uint256 tokenId = _tokenIdCounter++; _tokens[tokenId] = Token(to, address(0)); _balances[to]++; emit Transfer(address(0), to, tokenId); } // Get the balance of an owner function balanceOf(address owner) external view returns (uint256) { require(owner != address(0), "Owner address cannot be zero"); return _balances[owner]; } // Get the owner of a specific token function ownerOf(uint256 tokenId) public view returns (address) { address owner = _tokens[tokenId].owner; require(owner != address(0), "Token does not exist"); return owner; } // Approve another address to transfer the specified token function approve(address to, uint256 tokenId) external { address owner = ownerOf(tokenId); require(msg.sender == owner, "Not the token owner"); _tokens[tokenId].approved = to; emit Approval(owner, to, tokenId); } // Get the approved address for a specific token function getApproved(uint256 tokenId) public view returns (address) { require(_tokens[tokenId].owner != address(0), "Token does not exist"); return _tokens[tokenId].approved; } // Approve or revoke permission for an operator to manage all tokens function setApprovalForAll(address operator, bool approved) external { require(operator != msg.sender, "Cannot approve oneself"); _operatorApprovals[msg.sender][operator] = approved; emit ApprovalForAll(msg.sender, operator, approved); } // Check if an operator is approved to manage all tokens of the owner function isApprovedForAll(address owner, address operator) external view returns (bool) { return _operatorApprovals[owner][operator]; } // Transfer ownership of a token function transferFrom(address from, address to, uint256 tokenId) external { require(msg.sender == from || msg.sender == getApproved(tokenId) || _operatorApprovals[from][msg.sender], "Not authorized"); require(_tokens[tokenId].owner == from, "Incorrect owner"); require(to != address(0), "Cannot transfer to zero address"); // Call before transfer hook _beforeTokenTransfer(from, to, tokenId); // Transfer the token _tokens[tokenId].owner = to; _tokens[tokenId].approved = address(0); _balances[from]--; _balances[to]++; emit Transfer(from, to, tokenId); } // Internal function to clear approval when transferring function _clearApproval(uint256 tokenId) internal { if (_tokens[tokenId].approved != address(0)) { delete _tokens[tokenId].approved; } } // Internal hook to be overridden function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual {} } // Interface for ERC 4907 interface IERC4907 { event UpdateUser(uint256 indexed tokenId, address indexed user, uint64 expires); function setUser(uint256 tokenId, address user, uint64 expires) external; function userOf(uint256 tokenId) external view returns (address); function userExpires(uint256 tokenId) external view returns (uint256); } // ERC 4907 Implementation contract ERC4907 is MyERC721Token, IERC4907 { // Custom errors error CanNotRentToZeroAddress(); error NotOwnerOrApproved(); error InvalidExpire(); struct TenantInfo { address tenant; uint64 expires; } mapping(uint256 => TenantInfo) internal _tenants; constructor() { // Minting initial tokens for (uint256 i = 1; i <= 10; i++) { mint(msg.sender); // Minting 10 NFTs } } function setUser(uint256 tokenId, address tenant, uint64 expires) public override { if (ownerOf(tokenId) != msg.sender && getApproved(tokenId) != msg.sender) { revert NotOwnerOrApproved(); } if (tenant == address(0)) { revert CanNotRentToZeroAddress(); } if (expires <= block.timestamp) { revert InvalidExpire(); } TenantInfo storage ref = _tenants[tokenId]; ref.tenant = tenant; ref.expires = expires; emit UpdateUser(tokenId, tenant, expires); } function userOf(uint256 tokenId) public view override returns (address) { TenantInfo storage ref = _tenants[tokenId]; if (ref.expires >= block.timestamp) { return ref.tenant; } else { return address(0); } } function userExpires(uint256 tokenId) public view override returns (uint256) { return _tenants[tokenId].expires; } // Override the transfer function to clear tenant info on transfer function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal override { super._beforeTokenTransfer(from, to, tokenId); TenantInfo storage ref = _tenants[tokenId]; if (from != to && ref.tenant != address(0)) { delete _tenants[tokenId]; emit UpdateUser(tokenId, address(0), 0); } } } ConclusionWith the release of ERC 4907, which provides a flexible framework designed specifically for the growing NFT rental industry, non-fungible tokens (NFTs) have evolved tremendously. Its dual-role strategy not only makes rights allocation more clear but also lays the foundation for a range of partnerships and applications. This innovation comes at a perfect time, as it tackles the intricacy of the leasing space and keeps up with the exponential growth of digital assets.ERC 4907 represents an evolution in the NFT space by introducing rental functionalities, and providing new opportunities for monetization and interaction with digital assets. It opens the door to innovative business models and use-cases across various industries, enhancing the utility of NFTs beyond mere ownership.The NFT environment is about to change as ERC 4907 redefines digital asset leasing and develops popularity across several ecosystems. A future of innovation and fluidity in digital asset management is promised by the protocol, which also offers increased security, operational efficiency, and a multitude of opportunities. As a major protagonist in the story of digital innovation, ERC 4907 solidifies its position by setting new standards that not only predict future trends but also meet present needs. Need assistance with developing your NFT project, connect with our skilled blockchain and NFT developers to get started.References:https://github.com/tronprotocol/tips/blob/master/tip-4906.mdhttps://ethereum-magicians.org/t/eip-6884-delegatable-utility-tokens-derived-from-origin-nfts/13837/https://github.com/ethereum/ERCs/blob/master/ERCS/erc-7507.md/https://github.com/ethereum/web3.py/issues/1351https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/IERC721.solhttps://forum.openzeppelin.com/t/error-verifying-erc721-in-etherscan-file-import-callback-not-supported-with-github-imports/4198https://soliditydeveloper.com/erc-1155https://medium.com/coinmonks/erc-721-tokens-b83d7fc3e740https://ethereum.stackexchange.com/questions/117365/executing-view-read-functions-on-gnosis-safe-with-raw-encoded-data/https://www.kaleido.io/blockchain-blog/how-to-create-and-deploy-an-erc-721-tokenhttps://github.com/OpenZeppelin/openzeppelin-contracts/issues/3659https://hips.hedera.com/hip/hip-376

Technology: SMART CONTRACT , SOLIDITY more Category: Blockchain

Tushar Shrivastava

24 Sep 2024

Understanding Cosmos IBC for Cross-Chain Communication In the evolving landscape of blockchain technology, interoperability remains a crucial yet challenging frontier. As decentralized applications and ecosystems grow, the need for seamless interaction between diverse blockchains has become paramount. The Cosmos IBC (Inter-Blockchain Communication) protocol emerges as a groundbreaking solution, designed to facilitate secure and reliable data exchange across heterogeneous blockchain networks.This blog explores the core principles, and potential of the Cosmos IBC protocol, underscoring its significance in the Cosmos blockchain development ecosystem.Read Also | Exploring the Emerging Use Cases of Cosmos BlockchainWhat is Cosmos IBC?The Inter-Blockchain Communication (IBC) protocol is integral to the Cosmos blockchain ecosystem. It provides a standardized way for independent blockchains to communicate with each other. It enables the transfer of assets and data across distinct networks without requiring a centralized intermediary. IBC operates on a principle similar to TCP/IP in the internet world, creating a universal language for blockchain interoperability.Cosmos IBC addresses the challenge of cross-chain communication, especially relevant for application-specific blockchains and private blockchains. It solves issues related to asset swaps between different blockchains and facilitates interaction between public and private chains. Implementations for private blockchains like Hyperledger Fabric and Corda are already in place. By enabling secure and efficient cross-chain transactions, IBC enhances scalability, reduces transaction costs, and improves network capacity and finality compared to other platforms.Discover | Top Blockchain Platforms for Blockchain App DevelopmentHow Does IBC Work?The following infographic depicts the working of the IBC Protocols -IBC facilitates communication between chains through a sequence of steps:Light ClientsEach participating blockchain runs a light client of the other blockchain to verify transactions without needing to trust an external party. Light clients keep track of the state of the different blockchains to ensure validity.Connection HandshakeChains establish a connection via a handshake process, which involves exchanging proof of their states and confirming the identity of the counterparty.Channel CreationOnce a connection is established, channels are created to facilitate communication. Each channel is bound to a specific application, ensuring the integrity and security of data transfers.Packet RelayingData is sent in packets through these channels. Relayers (participants in the network) monitor and relay these packets between chains, verifying their authenticity and ensuring correct delivery.AcknowledgmentsReceiving chains send acknowledgments back to the sender, confirming receipt and ensuring that transactions are finalized only when the corresponding proof of receipt is verified.Explore |Cosmos Blockchain: Bridging Interoperable Decentralized NetworksKey Features of Cosmos IBC ProtocolInteroperabilityIBC's universal standards facilitate compatibility across a wide range of blockchain protocols, making it a versatile tool for developers.ModularityThe protocol is designed to be highly modular, allowing it to be easily integrated with various blockchains, regardless of their underlying technology.ScalabilityBy enabling parallel operation of multiple independent blockchains, IBC enhances the scalability of the overall ecosystem.SecurityThe use of light clients and cryptographic proofs ensures secure and tamper-resistant communication between chains.Discover | Web3 App Development | Building a Decentralized FutureUse Cases and ApplicationsCross-Chain Token TransfersOne of the most prominent applications of IBC is the transfer of tokens between different blockchains, enabling liquidity and asset interoperability.Decentralized Finance (DeFi)IBC allows DeFi platforms to leverage assets and liquidity from multiple blockchains, creating more robust and interconnected financial services.Data SharingBeyond assets, IBC can exchange arbitrary data, facilitating use cases such as cross-chain oracles and shared governance mechanisms.Check Out | Exploring the Top Blockchain Platforms for Your EnterpriseConclusionThe Cosmos IBC protocol represents a significant advancement in blockchain technology, addressing the critical need for interoperability in a decentralized world. By enabling secure, scalable, and seamless communication between diverse blockchains, IBC paves the way for a more integrated and efficient blockchain ecosystem. As the adoption of IBC grows, we can expect to see a new era of cross-chain collaboration and innovation, unlocking unprecedented opportunities for developers, businesses, and users.Are you ready to harness the power of blockchain interoperability? At Oodles Blockchain, we integrate cutting-edge solutions like Cosmos's IBC protocol to elevate your blockchain projects. Contact our blockchain developers today to explore how we can help you build interconnected, scalable, and secure blockchain applications that drive real value.

Technology: SMART CONTRACT , Javascript more Category: Blockchain

Saumya Srivastava

23 Sep 2024

Telegram Mini Apps vs. Telegram Bots : Exploring the Key Differences Telegram has grown far beyond its origins as a messaging app. It evolved into a versatile platform where developers and businesses can build a variety of tools and applications. Among the features that stand out are Telegram Crypto Trading Bots andTelegram Mini Apps (TMAs). Each of these offers unique functionalities and serves different purposes, catering to diverse needs within the Telegram ecosystem.In this blog, we compare Telegram Bots and Mini Apps, highlighting their unique functionalities, integration methods, development processes, and more.Suggested Read | Telegram Crypto Trading Bot DevelopmentUnderstanding Telegram Bots and Telegram Mini AppsWhat Are Telegram Bots?Telegram Bots are automated software applications that run on the Telegram platform. They interact with users through Telegram's messaging interface, performing tasks and providing information based on predefined commands and inputs.Key Features of Telegram BotsAutomated Interaction: Bots can respond to user inputs with predefined messages or actions, making them ideal for customer support, information retrieval, and interactive experiences.APIs and Webhooks: Developers can use Telegram's Bot API to interact with the platform programmatically. This allows for real-time messaging, updates, and more complex integrations with external services.Customization: Bots can be programmed to handle various tasks, from sending notifications to managing group activities and even processing payments.Ease of Access: Users can start interacting with a bot simply by searching for its username and initiating a conversation, without the need for additional installations.Rich Interaction: Bots can use Telegram's features like inline keyboards, custom commands, and callback queries to create interactive and engaging experiences.Some Use Cases for Telegram BotsCustomer Support: Provide instant answers to common questions or guide users through troubleshooting steps.Content Delivery: Share updates, news, or media content regularly with subscribers.Interactive Services: Facilitate quizzes, games, and other interactive experiences within a chat.Explore | Top 7 Most Popular Telegram Crypto Trading Bots in 2024What Are Telegram Mini Apps?Telegram Mini Apps, orTelegram Web Apps, are web-based applications that are embedded within Telegram chats. They offer a more immersive and interactive experience than standard web links or bots by leveraging the Telegram client's interface directly. These apps basically bridge the gap between Telegram bots and full-fledged heavy web applications.Key Features of Telegram Mini AppsSeamless Integration: Mini Apps run directly within the Telegram interface. They provide a seamless experience without requiring users to leave the chat or switch apps.Rich User Interface: They can offer a more sophisticated and visually appealing interface than bots, supporting complex layouts, multimedia, and dynamic content.Enhanced Functionality: Mini Apps can utilize the full power of web technologies (HTML, CSS, JavaScript) to create advanced features, such as real-time updates, interactive forms, and sophisticated user interactions.User Authentication: They can access Telegram user information and authenticate users directly via Telegram, simplifying login and personalization processes.Context Awareness: Mini Apps can leverage the context of the conversation or chat to tailor their functionality and provide more relevant interactions.Also, Check | Develop Your Own Telegram Mini Apps : A Step-by-Step GuideSome Use Cases for Telegram Mini AppsE-Commerce: Create shopping experiences where users can browse products, make purchases, and track orders all within Telegram.Games and Entertainment: Develop interactive games or multimedia experiences that benefit from a rich, immersive environment.Productivity Tools: Build tools for tasks like project management, scheduling, or document collaboration, all within the Telegram interface.You may also like | DCA Bot Development | A Comprehensive ExplorationDifferences Between Telegram Bots and Telegram Mini AppsBased on the parameters, let's figure out the differences betweenTelegram Bots and Telegram Mini AppsFunctionalityTelegram Bots are automated programs that interact with users through chat. They handle specific tasks based on user commands and queries. Bots are excellent for automating simple tasks like providing weather updates or setting reminders.Telegram Mini Apps (TMAs) are full-fledged web applications integrated into Telegram. They offer a richer experience than Bots, supporting diverse functionalities like gaming and productivity tools. TMAs provide a more immersive user experience with interactive features.IntegrationTelegram Bots function as separate entities within the Telegram app. Users interact with Bots through chat commands and responses. Their integration is limited to the chat environment, which can restrict interaction with other Telegram features.Telegram Mini Apps (TMAs) are seamlessly integrated into Telegram. Users can access Mini Apps through chats or other Bots, creating a more cohesive experience. This deep integration allows Mini Apps to interact more fully with Telegram's core features.DevelopmentTelegram Bots use the Telegram Bot API for development. Developers can create Bots using various programming languages. The Bot API provides tools for handling text-based interactions and automating responses.Telegram Mini Apps (TMAs) are developed using web technologies like HTML, CSS, and JavaScript, along with Telegram's API. This approach allows for the creation of complex applications with custom user interfaces. Developing a Mini App is more intricate and requires web development skills.CapabilitiesTelegram Bots handle basic tasks and interactions. They can perform functions like providing weather information or managing simple data queries. Their capabilities are generally limited to text-based interactions and basic media sharing.Telegram Mini Apps (TMAs) support advanced functionalities. They handle rich media, including videos, images, and audio. TMAs can provide detailed user interactions and complex application features, making them suitable for diverse use cases.AuthorizationTelegram Bots offer easy authorization through Telegram. Users interact with Bots using their Telegram accounts without additional authentication steps. This seamless integration is ideal for simple, automated interactions.Telegram Mini Apps (TMAs) provide more flexible authorization options. They can include features like in-app purchases or subscriptions. This flexibility allows for a more customized user experience and diverse monetization strategies.User InterfaceTelegram Bots have a limited user interface. They rely on text commands, buttons, and basic media sharing. This simple interface is effective for straightforward tasks but less engaging for complex interactions.Telegram Mini Apps (TMAs) offer custom user interfaces with rich media support. They can include complex layouts, interactive elements, and multimedia content. This capability creates a more engaging and visually appealing user experience.Cross-Platform CompatibilityTelegram Bots work across all Telegram-supported devices but remain confined to the chat interface. Their functionality does not extend beyond the Telegram app, limiting their cross-platform capabilities.Telegram Mini Apps (TMAs) are web-based and accessible across various platforms, including Android, iOS, PC, Mac, and Linux. This compatibility ensures a consistent experience on any device.Monetization ScopeTelegram Bots have limited monetization options. They can integrate with external payment systems but generally offer fewer revenue opportunities compared to more advanced tools.Telegram Mini Apps (TMAs) offer robust monetization options. Developers can implement in-app purchases, subscriptions, and advertising. This flexibility allows for multiple revenue streams and greater financial potential.Web3 IntegrationTelegram Bots typically do not support Web3 technologies. Their functionality is limited to traditional Telegram features and API capabilities.Telegram Mini Apps (TMAs) support Web3 integration, including the TON SDK and TON Connect. This support allows developers to create decentralized applications and explore blockchain-based functionalities.Community InvolvementTelegram Bots has an active developer community focused on practical and efficient automated tools. The community shares resources and best practices for Bot development.Telegram Mini Apps (TMAs) benefit from a thriving, innovation-focused community. Developers in this space explore new possibilities and push the boundaries of what can be achieved within Telegram.ExamplesTelegram Bots include language translation Bots, news aggregation Bots, and customer service chatbots. They are designed for automating specific tasks and providing information through text-based interactions.Telegram Mini Apps (TMAs) include gaming platforms, e-commerce solutions, and productivity tools. These applications offer rich, interactive experiences and are often more complex and feature-rich than Bots.Also, Explore | Can ChatGPT Replace Crypto Trading BotsChoosing Between Telegram Bots and Telegram Mini AppsThe choice between a Telegram Bot and a Mini App largely depends on your project's goals and requirements.For Simplicity and Quick InteractionsIf you need a straightforward solution to automate tasks or provide basic interactions, a Telegram Bot is likely the best choice. They are easier to develop and deploy, making them ideal for customer support or content delivery.For Rich, Interactive ExperiencesIf your goal is to create a complex, visually engaging experience within Telegram, a Mini App will be more suitable. They offer greater flexibility and can provide a more immersive user experience, making them ideal for e-commerce, games, or advanced productivity tools.Suggested Read | TON Blockchain: A Guide to Telegram's Ambitious ProjectConclusionTelegram Bots and Mini Apps each have unique advantages and cater to different needs. Bots are ideal for straightforward automation and simple interactions, while Mini Apps provide a richer, more immersive experience. Understanding these differences helps you choose the right tool for your needs.If you're considering developing a Telegram Mini App, look no further than Oodles Blockchain. Our team of expertblockchain developers can help you create a sophisticated Mini App tailored to your specific requirements. Contact us today to get started and bring your vision to life within Telegram!

Technology: solana , Unity Engine more Category: Blockchain

Saumya Srivastava

10 Sep 2024

How to Utilize Rollup-as-a-Service for Maximum Efficiency As the demand forblockchain solutions continues to surge, scalability remains one of the most critical challenges facing the industry. The ability to efficiently process a large number of transactions quickly is crucial to meet growing demands.When a network is unable to handle the demand, it leads to congestion, resulting in slow transaction processing times, high fees, and a poor user experience. This can hinder the usability of blockchain networks, especially for applications with high transaction volumes. Achieving scalability is therefore crucial for the future growth and adoption of blockchain technology. This will ensure that networks can accommodate increased traffic without compromising performance. To address this, innovative solutions like Rollup-as-a-Service (RaaS) are emerging, offering a way to enhance blockchain performance without compromising security or decentralization.But what exactly isRaaS, and how does it contribute to the growing ecosystem of Layer 2 solutions?In this blog, we'll explore the concept ofRollup-as-a-Service, its types, features, and the benefits it offers to various stakeholders in the blockchain space.Suggested Read |Comprehending ZK Rollups | Layer 2 Scaling SolutionsWhat is a Rollup-as-a-Service?Rollup-as-a-Service (RaaS) refers to a specialized service or a concept that provides scalable, efficient, and cost-effective solutions for blockchain networks. Rollups-as-a-Service (RaaS) provides a layer of abstraction overRollup frameworks andSoftware Development Kit(SDKs). This makes it simple to deploy, maintain, and build custom, production-grade application-specific rollups (AppRollups). RaaS allows developers to concentrate on building the application layer, transforming a task that used to require multiple engineers' hours to complete into a 10-minute, no-code deployment process.RaaS platforms also enable Web3 businesses to implement rollup technology— a method of bundling or "rolling up" multiple transactions into a single batch to be processed off-chain and then recorded on-chain as a single transaction. This approach significantly reduces the load on the primary blockchain (Layer 1), thereby enhancing its performance and scalability.Also, Visit |Layer 2 Blockchain Scaling Solutions | Resolving Scalability IssuesTypes of RaaSRaaS platforms generally fall into two main categories based on the type of rollup they implement:Optimistic Rollups andZero-Knowledge (zk) Rollups.Optimistic RollupsOptimistic rollups operate on the assumption that all transactions are valid, eliminating the need for immediate verification. However, they incorporate a challenge period, allowing anyone to dispute a transaction if they suspect foul play. If a challenge is successful, the transaction is reversed. This approach is notable for its simplicity and seamless integration with existing smart contracts.Zero-Knowledge Rollups (zk-Rollups)Zero-knowledge rollups, or zk-Rollups, rely on cryptographic proofs to validate transactions before they are posted on-chain. Unlike Optimistic rollups, zk-Rollups generate validity proofs (zk-SNARKs or zk-STARKs) that allow the network to verify the accuracy of each transaction batch without needing to check individual transactions. This results in faster finality and enhanced security, though it comes at the cost of higher computational complexity.Read More |Zero-Knowledge Proof for Blockchain Transaction PrivacyFeatures and Functionalities of Rollup-as-a-Service (RaaS) PlatformsRaaS platforms offer a range of features designed to optimize blockchain scalability while maintaining security and decentralization:Transaction BundlingTransaction bundling reduces fees and improves network efficiency by grouping multiple transactions together. This feature is ideal for high-volume scenarios, optimizing cost and performance for scalable blockchain solutions.Deployment EaseRaaS platforms simplify blockchain deployment with user-friendly interfaces. Businesses can launch DApps or smart contracts quickly, without needing deep technical knowledge. This reduces time and effort in bringing blockchain projects to market.Broader AccessibilityRaaS platforms offer cross-platform compatibility, making blockchain applications accessible on various devices. This feature ensures broader reach and usability, driving wider adoption across different user environments.Development ToolsWith a robust suite of pre-built and customizable tools, RaaS platforms accelerate blockchain development. Developers can quickly build and deploy tailored applications, reducing time and effort while fostering innovation.Quicker Launch TimeRaaS platforms enable faster project launches by providing pre-configured environments. This quickens time-to-market, allowing businesses to capitalize on opportunities without delay.Cost SavingsRaaS platforms optimize resource usage, offering scalable and cost-effective blockchain solutions. This makes blockchain accessible to businesses of all sizes, enabling innovation without excessive spending.Security MechanismsSecurity is a top priority in RaaS platforms, which offer advanced protection like encryption and secure key management. These features ensure data and transactions are safe, building trust in blockchain solutions.Seamless API IntegrationRaaS platforms provide well-documented APIs for easy integration with existing systems. This allows businesses to incorporate blockchain technology smoothly, enhancing capabilities with minimal disruption.Deep Monitoring and AnalyticsRaaS platforms offer real-time monitoring and analytics, providing valuable insights into blockchain operations. This ensures optimal performance and allows businesses to address issues proactively.Continuous Upgrades and MaintenanceRegular updates and maintenance from RaaS platforms keep blockchain applications up-to-date and secure. This ongoing support ensures reliability and adaptability in a rapidly evolving technological landscape.Smart Contract CompatibilityRaaS platforms support smart contracts across various blockchain networks, ensuring flexibility and interoperability. This feature allows businesses to create versatile applications that work seamlessly in different ecosystems.Also, Visit |Layer 2 Blockchain Scaling SolutionsHow does Rollup-as-a-Service Work?Project OnboardingFor web3 projects, sign up with RaaS platforms to access a complete suite of SDKs, templates, and plug-and-play tools for a quick start.CustomizationPlatforms allow customization of rollups, including security settings, transaction capacities, fees, and performance standards based on specific project needs.Integration of ToolsSeamless integration of development tools, libraries, and SDKs into Web3 applications ensures smooth operation and functionality.Monitoring and MaintenanceRaaS providers offer continuous monitoring and maintenance to keep rollups secure and performant with regular updates and checks.Scaling and UpgradesDevelopers can scale rollup networks as projects grow, accommodating increasing transaction volumes and evolving requirements efficiently.What Web3 Projects Can Leverage from RaaS Platforms?Web3 projects can greatly benefit from RaaS platforms by enhancing scalability and efficiency. For Layer-1 networks like Ethereum, RaaS simplifies the deployment of custom rollups, avoiding the complexities of managing infrastructure components such as nodes and wallets. Similarly, Layer-2 solutions can use RaaS to implement rollups as Layer-3 chains, improving transaction speeds and reducing congestion. RaaS also provides a cost-effective alternative to application-specific blockchains (AppChains), allowing projects to scale without the overhead of standalone blockchains. For large-scale applications like gaming and NFTs, RaaS facilitates high-speed transactions and congestion-free environments, overcoming scalability challenges with minimal effort.Suggested Read | Comprehending ZK Rollups | Layer 2 Scaling SolutionsLeverage RaaS for Web3 Projects?Web3 projects from various businesses or enterprises can leverage RaaS platforms to significantly improve transaction processing speeds, reduce network congestion, and enhance overall efficiency.There are several ways web3 enterprises can easily utilize RaaS platforms to boost the functionality of their blockchain networks.Here's how:Incorporating Layer-2 and Layer-3 SolutionsRaaS platforms can be implemented to deploy rollups as Layer-2 solutions, enhancing scalability by processing transactions off-chain and submitting aggregated data to the main blockchain. This approach improves speed and reduces congestion.Custom RollupsEnterprises can create custom rollups tailored to their specific needs, such as adjusting security settings, transaction capacities, and performance metrics. This flexibility allows for specialized solutions that align with business requirements.Cross-Chain IntegrationRaaS platforms facilitate the integration of rollups with multiple blockchain networks, enabling interoperability and seamless interaction between different chains and applications.Check It Out |Solutions to Address the Blockchain's Scalability TrilemmaSumming UpRollup-as-a-Service (RaaS) is a powerful solution for blockchain scalability, enabling efficient off-chain processing of transactions. With RaaS, various businesses and developers can scale their database, and DeFi solutions, or integrate layer 2 solutions without worrying about investing in their own infrastructure or other resources.Get in touch with our expertblockchain developers today to learn more about how RaaS can benefit your business. We'll help you unlock the full potential of blockchain technology with robust security measures and scalable solutions. Contact us now to take the first step towards efficient and scalable blockchain solutions.

Technology: SMART CONTRACT , REDIS more Category: Blockchain

Saumya Srivastava

10 Sep 2024

Top 7 Use Cases of Telegram Mini Apps to Boost Your Business Strategy Initially known for its robust messaging capabilities, Telegram Messenger has evolved into an all-encompassing solution for businesses and brands. One of the most exciting developments on Telegram is the introduction of decentralized applications (dApps) known asTelegram Mini Apps. These Mini applications have all it takes to take blockchain technology to the mainstream markets. With over500 million of Telegram's 950 million users interacting with Mini Apps monthly, they stand at the forefront of business innovation.This blog explores 7 compellinguse cases of Telegram Mini Apps that can enhance your business strategy and give you a competitive edge.Also, Read | GameFi and Blockchain: The Future of Online GamingTop 7 Use Cases of Telegram Mini Apps for BusinessesFrom simplifying transactions to enhancing customer interactions, Mini Apps provide unique opportunities for growth and efficiency. Let's dive into the top use cases of Telegram Mini Apps.E-Commerce and ShoppingThe e-commerce industry is constantly evolving, and businesses are always on the lookout for new ways to engage customers and streamline the purchasing process.Telegram Mini Apps for E-commerce offers a seamless way to create custom e-commerce solutions within the Telegram platform. With a Mini App, you can showcase your products, manage inventory, handle payments, and even provide real-time customer support—all without requiring customers to leave the Telegram environment. This level of integration simplifies the shopping experience, increases customer retention, and provides businesses with valuable insights into consumer behavior.Example: A confectionary retailer could use a Telegram Mini App to offer a personalized shopping experience, complete with sweetery recommendations based on user preferences, one-click purchases, and instant customer service via chatbots.DeFi DevelopmentDecentralized Finance (DeFi) is rapidly gaining traction in the blockchain sector, and Telegram Mini Apps are playing a crucial role in this expansion. By leveraging Mini Apps, businesses can deliver a range of DeFi services—such as decentralized lending, staking, and yield farming—directly within the Telegram environment. This integration enables users to access DeFi tools without needing additional apps or platforms.These Mini Apps are designed to demystify complex DeFi processes. It makes them more accessible to a wider audience while ensuring security through blockchain protocols. With their seamless integration, businesses can effectively engage new users and facilitate an effortless onboarding experience.Example: A DeFi platform could develop a Mini App on Telegram that enables users to manage their portfolios, stake tokens, and earn interest—all within one app. Additionally, the Mini App could include tutorials and FAQs to help newcomers navigate the intricacies of DeFi with confidence.Gaming and EntertainmentThe gaming and entertainment industries thrive on engagement and user interaction. Telegram Mini Apps are a perfect fit for game developers and entertainment brands looking to create engaging experiences within a familiar platform. From casual games to multiplayer options,building Telegram Mini Apps can offer a variety of entertainment options. This too without requiring users to download or sign up for additional services.In-game rewards, achievements, and virtual economies can be built into these Mini Apps, providing a rich user experience. With easy integration into Telegram's social features, businesses can foster a sense of community among their users while offering real-time updates, challenges, and events.Example: A game development studio could create a trivia Mini App where players compete against their friends and the larger Telegram community. The app could include features such as leaderboard rankings, in-game purchases, and social sharing options to increase engagement and encourage repeat participation.Customer SupportEffective customer support is crucial for any sort of business.Telegram bots for customer supportcan significantly enhance this segment by offering automatic and real-time assistance. Companies can develop their own Mini Apps and connect them to chatbots and support systems. This setup allows users to get answers to their questions, find solutions to problems, and access necessary materials directly within the Telegram application. This reduces wait times, ensures 24/7 support availability, and improves overall customer satisfaction.Example: An online electronics store could implement a customer support Mini App that allows users to troubleshoot issues with their purchased products. The app can offer step-by-step guides, and automated responses for frequently asked questions, and escalate issues to live agents if necessary.Marketing Campaigns and Social NetworkingDid you know Telegram Mini Apps offer an innovative way to run marketing campaigns that directly engage with your target audience? Whether you're running a giveaway, promoting a new product, or collecting feedback, Mini Apps allow businesses to interact with users in real-time. Marketers can use these apps to gather customer data, offer personalized promotions, and even execute gamified marketing strategies to encourage higher participation.The seamless integration with Telegram's messaging features allows businesses to quickly share marketing content, drive traffic to the Mini App, and track user engagement for better insights.Thus, Telegram Mini Apps foster social networking and community engagement by integrating with Telegram's messaging and social features. This allows users to effortlessly share their interactions, achievements, and promotions with their contacts. As a result, user engagement is enhanced, and marketing campaigns reach a broader audience through seamless connectivity.Example: A cosmetics brand could launch a Mini App where users can participate in a virtual "spin-the-wheel" game to win discounts or free products. The app can also collect valuable users.Explore |How Web3 and Blockchain are Transforming GamingBooking SystemsWhether you're running a hotel, restaurant, or appointment-based service, Telegram Mini Apps can simplify the booking process for your customers. Businesses can use Mini Apps to enable users to schedule appointments, make reservations, or book services directly through the Telegram interface. These apps provide real-time availability, send notifications, and offer integration with payment gateways, making the process hassle-free.By eliminating the need for third-party booking platforms, businesses can retain users within the Telegram ecosystem, enhancing customer retention and simplifying follow-up communication.Example:A spa business can transform its booking process by introducing a Telegram Mini App. This innovative tool can allow clients to browse treatment options effortlessly. They will be able to book appointments and handle payments directly within Telegram. The Mini App can also send real-time updates and reminders about upcoming appointments. It can feature a live chat function for instant customer support. Additionally, with an integrated loyalty program, clients can earn and redeem rewards seamlessly. This approach could enhance client convenience, streamline operations, and provide valuable insights into client preferences. Ultimately, it will set a new standard in spa service excellence.Health and Fitness SystemsIn the health and fitness industry, providing personalized and real-time solutions is essential. Telegram Mini Apps can support businesses by offering personalized workout plans, tracking progress, and providing virtual consultations—all within the Telegram app. Fitness trainers, nutritionists, and wellness centers can use Mini Apps to stay connected with clients, offer virtual coaching, and monitor progress toward health goals.The Mini App's convenience means users don't need to switch between multiple platforms. This increases engagement and helps build a strong community around the brand.Example:A nutritionist could create a Mini App that delivers customized meal plans based on users' dietary preferences and health goals. The app would allow users to track their daily food intake, receive nutrition tips, and schedule virtual consultations with the nutritionist. Automated reminders and motivational messages would help users stay on track with their nutritional goals, making the app a comprehensive tool for managing their diet and wellness.A fitness coach could develop a Mini App that offers personalized workout routines, allows users to track their progress, and integrates with a chatbot for daily motivational messages. Clients can also schedule virtual training sessions through the app, making it a one-stop solution for their fitness needs.Also, Visit | Exploring the Power of AI and Blockchain for Autonomous VehiclesSumming UpFrom being a top-tier messaging app, Telegram has expanded into a versatile tool for businesses. From e-commerce and DeFi to gaming, customer support, marketing, booking systems, and health and fitness, these apps provide innovative solutions that drive efficiency and improve customer experience.If you haven't yet explored how Telegram Mini Apps can benefit your business, now is the time to start. Interested in developing and launching your own Telegram Mini App? Get in touch with us today to start your journey towards a blockchain-powered future. From e-commerce and DeFi to gaming and health and fitness, our expertblockchain developers can help you build secure, scalable, and efficient systems tailored to your needs.

Technology: SMART CONTRACT , ETHERJS more Category: Blockchain

Saumya Srivastava

10 Sep 2024

Develop Your Own Telegram Mini Apps : A Step-by-Step Guide The introduction of Mini Apps has provided developers with an exciting new opportunity to create interactive applications that run directly within Telegram chats. Recent statistics show that over500 million out of Telegram's 950 million users interact with mini apps monthly. These lightweight apps offer seamless integration and instant access to various services, from games and utilities to e-commerce and productivity tools, all within the familiar Telegram interface.This blog guide takes you through the step-by-step process ofTelegram Mini App development, from understanding the platform to successfully launching and promoting your creation.Read also |DAOs in Gaming: A New Governance ModelBooming Rise of Telegram Mini Apps in 2024Telegram Mini Apps emerges as a game-changer in 2024. It offers a seamless and versatile experience for both users and businesses alike.With over 700 million active users on Telegram, Mini Apps provide an attractive platform for companies. They enable businesses to engage with customers, streamline service delivery, and enhance user experience without leaving the chat interface.Building and maintaining Telegram Mini Apps is a worthwhile investment for businesses. It enables them to acquire new users, automate customer support, personalize interactions, and scale operations. Whether the goal is to grow a community, offer advanced services, or simplify processes, Telegram Mini Apps deliver a powerful solution for business growth. As businesses seek innovative ways to connect with customers and stay ahead in the digital landscape, Telegram Mini Apps are set to become an essential part of their strategies in 2024.You may also like | Saudi Arabia is Ready to Embrace Web3 and GamingDevelop and Launch Your Own Telegram Mini AppDeveloping a new Telegram web app can be quite challenging, especially for first-time users of the platform. Following are some simple steps to develop your own Telegram Mini App.Step 1. Analyze the platformUnderstand the RequirementsTo create Mini Apps for Telegram, it's important to understand the specific requirements. These apps are meant to work within the Telegram platform, so they need to meet certain technical standards and follow guidelines. For example, since most users access Telegram on mobile, Mini Apps should be mobile-first responsive, fast-loading, and lightweight. They also have to integrate smoothly with the Telegram bot API as well as the Telegram Mini App API for secure user interactions.Read Telegram developer resourcesTelegram provides a wealth of documentation and resources for developers. These materials cover everything from basic bot creation to advanced API integrations. By thoroughly reviewing officialTelegram Mini App documentation and its guidelines, you can gain a deeper understanding of the tools and technologies at your disposal, as well as the best practices for developing Mini Apps.Step 2. Plan Your Mini AppIdentify the PurposeOnce you have a good grasp of the platform, the next step is to plan your Mini App. Start by defining the purpose of your Mini App. What problem would it solve? What value will it offer to your users? What sort of use cases and functionalities will it provide? Whether you're creating a game, a productivity tool, or a service app, having a clear understanding of your app's purpose will guide your Telegram Mini App development process and help you make informed decisions along the way. A well-planned strategy is crucial for developing a Telegram mini web app that aligns with your objectives and provides an excellent user experience.Define and design user experienceMore than half of global internet traffic comes from mobile devices, so mobile-first design is important. Designing your Mini App's user experience (UX) and interface involves several key considerations to ensure it integrates well with Telegram. First, map out the user journey, from launching the app to using its features, ensuring the interface is intuitive and user-friendly. Focus on a mobile-first, responsive design that adapts to various screen sizes. Align interactive elements with Telegram's existing UI components in both style and behavior. Ensure all inputs and images are properly labeled to support accessibility. Finally, adapt to Telegram's dynamic theme-based colors for visual consistency.Step 3. Set Up Your Development EnvironmentCoding ToolsChoosing the right coding tools and frameworks is crucial for developing your Telegram Mini App. Since these apps primarily rely on web technologies, HTML, CSS, and JavaScript are the main languages you'll use. You might also consider using frameworks like React or Vue.js to simplify the development process and enhance your app's functionality.Server SetupYour Mini App will require a server to host its backend. This server will handle requests from Telegram's bot API, manage user sessions, and store any necessary data. When setting up your server, ensure it's optimized for performance and security. Consider using cloud services like AWS, Google Cloud, or DigitalOcean for reliable and scalable hosting.Step 4. Start Developing Your Mini AppCreate a Telegram BotEvery Telegram Mini App requires a bot to act as its interface with the platform. To create a bot, you'll need to use BotFather, Telegram's bot management tool. BotFather will guide you through the process of setting up your bot, generating an API token, and configuring its basic settings. This token is crucial as it allows your Mini App to interact with Telegram's API.Token CreationOnce your bot is set up, make sure to securely store the API token provided by BotFather. This token will be used to authenticate API requests between your Mini App and Telegram, so it's essential to keep it safe and confidential.Step 5. Develop the Mini AppHTML/CSS/JavaScript & Bot API IntegrationBegin by developing the front-end of your Mini App using HTML, CSS, and JavaScript. These languages will allow you to create a responsive and visually appealing interface that users can interact with directly within Telegram. Once the front-end is in place, you'll need to integrate it with Telegram's bot API. This integration will enable your Mini App to receive and respond to user inputs, send notifications, and perform other automated tasks.Web App IntegrationIf your Mini App involves a more complex web application, such as an e-commerce platform or a content management system, you'll need to integrate it smoothly with Telegram's interface. This integration should be seamless, ensuring that users can access all the app's features without leaving the Telegram environment.Implement Ways for Users to Launch and Interact with your AppKeyboard ButtonUse custom keyboard buttons to allow users to access specific functions or features within your Mini App quickly.Inline ButtonImplement inline buttons within messages to enable users to perform actions directly from the chat.Menu ButtonAdd buttons to the bot's menu for easy navigation and access to different sections of your Mini App.Inline ModeUtilize Telegram's inline mode to let users interact with your Mini App through inline queries without needing to open a separate chat.Direct LinkProvide direct links to your Mini App, making it easy for users to launch the app from any location.Attachment MenuIntegrate your Mini App with Telegram's attachment menu. It allows users to interact with your app while sharing files or media.Step 6. Initialize and Test Your Mini AppFor AndroidStart by testing your Mini App on Telegram's Android client. This will help you identify any platform-specific issues and ensure that your app performs well on mobile devices.For Telegram Desktop on Windows and LinuxNext, test your app on Telegram's desktop versions for Windows and Linux. Desktop users may have different expectations and use cases, so it's important to optimize the experience accordingly.For Telegram macOFinally, verify that your app functions smoothly on Telegram's macOS client. Pay attention to any platform-specific quirks that might affect the user experience.Step 7. Deploy Your Mini AppHost the AppChoose a reliable hosting provider for your app's backend. Your hosting service should offer strong performance, security, and scalability to handle the demands of your user base.Connect to the BotFinalize the connection between your hosted app and the Telegram bot. Ensure that the bot is correctly configured to interact with your app's backend and that all API requests are functioning as expected.Step 8. Launch and PromoteGo LiveDeploy your Mini App and make it available to Telegram users. Ensure that the launch is smooth by closely monitoring the app's performance and addressing any issues that arise.PromotionPromoting your Mini App is crucial for attracting users and gaining traction. Leverage Telegram channels, groups, and other social media platforms to spread the word about your app. Consider running marketing campaigns, offering special promotions, or collaborating with influencers to boost visibility. Additionally, gathering user feedback and making continuous improvements will help your app stay relevant and successful.Check It Out |How Web3 and Blockchain are Transforming GamingSumming UpBuilding a Telegram Mini App presents challenges like API limitations, integration hurdles, and security concerns. However, with this step-by-step guide, you are well-prepared to create, launch, and promote a successful Telegram Mini App that captivates your audience and achieves your business goals.Have a project in mind for Telegram Mini App development? Looking for expert guidance? Oodles Blockchain is here to help. Connect with our skilledblockchain developers today and turn your vision into reality!

Technology: SMART CONTRACT , POSTGRESQL more Category: Blockchain

Saumya Srivastava

10 Sep 2024

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