Decentralized Applications Development Tutorials, Guides & Insights

• Data Analytics: Use Etherscan if you need to fetch historical data, such as transaction histories, token balances, or account balances.
• Blockchain Explorers: Ideal for building tools similar to Etherscan itself, where you query and display blockchain data to users.
• Read-Only Data: You can’t send transactions, but you can retrieve information about any Ethereum address, smart contract, or token transfer.

• Decentralized Applications (dApps): If you’re building an application that needs to interact with Ethereum in real-time, such as sending transactions or calling smart contract functions.
• Wallets: If you are developing a wallet application that needs to sign and broadcast transactions.
• Smart Contract Deployment: Use Infura to deploy or interact with smart contracts on the Ethereum blockchain.

• Users deposit ETH into a smart contract.
• The smart contract issues an equivalent amount of WETH.
• WETH can then be used within DeFi platforms and decentralized applications.

• To retrieve the original ETH, users can exchange their WETH back through the smart contract.
• The contract will burn the WETH and return the original ETH to the user.

anchor init solana-spl-tutorial
cd solana-spl-tutorial

This will create a new Anchor project with a predefined directory structure.

• Reduce redundant calculations or operations within your smart contract. Precompute values where possible and reuse them.
• Example: Store the result of a complex computation in a variable rather than recalculating it multiple times.

Several tools can help you analyze and optimize gas consumption in your smart contracts:

• Web3.js: A JavaScript library for interacting with the Ethereum blockchain.
• contract.methods.setMessage(message).send({ from: accounts[0] }): Calls the smart contract’s setMessage function and sends a transaction to the blockchain.
• contract.methods.getMessage().call(): Calls the smart contract’s getMessage function to retrieve the stored message.

To interact with the Ethereum network, you need to connect MetaMask to your DApp.