Decentralized Applications Development Tutorials, Guides & Insights

In some cases, you might want to use both Etherscan and Infura. For example, you might use Etherscan to query transaction histories or token transfers, and Infura to send transactions or deploy contracts.

• Etherscan: Use to fetch transaction history and display it in your dApp.
• Infura: Use to allow users to send transactions or interact with smart contracts.

Wrapping ETH into WETH is a simple process that can be done through various decentralized exchanges or applications. Here’s a typical process:

• 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.

Once the build is complete, deploy the program using the following command:

anchor deploy

Why Gas Matters:

• Prevents Abuse: By charging for computational resources, Ethereum discourages spam and abuse on the network.
• Incentivizes Efficiency: Developers are motivated to write optimized code to minimize gas costs.

• 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.