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Blockchain Development Tutorials, Guides & Insights

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Understanding and Using the Etherscan API to Query Blockchain Data

Tutorial October 24, 2024

https://api.etherscan.io/api?module=proxy&action=eth_getTransactionByHash&txhash=0xYourTransactionHash&apikey=YOUR_ETHERSCAN_API_KEY

You can also query ERC-20 token balances for a given address using the Etherscan API.

Getting Wallet Balance Using Ethers.js in Node.js

Tutorial October 24, 2024

npm install ethers

If you plan to use Infura as your Ethereum provider, follow these steps:

Understanding 0x000000000000000000000000000000000000dead Address and Token Burns in Ethereum

Tutorial October 24, 2024

The "0x000000000000000000000000000000000000dead" address is used as a burn address because it is widely recognized as a destination for token destruction. Since tokens sent to this address are permanently locked and cannot be retrieved, it’s an ideal address for conducting token burns. It is a well-established convention across many blockchain projects.

For example, in token burn events, project developers often send tokens to this address to signal to the community that those tokens are now out of circulation. This is usually followed by a public announcement, detailing the number of tokens burned and the reasons behind the burn.

Writing an ERC-20 Token Contract with OpenZeppelin

Tutorial August 22, 2024
solidity

Now that your environment is set up, you can create the ERC-20 token contract.

  • In the contracts directory, create a new file called MyToken.sol:

Understanding Gas and Optimization in Smart Contracts

Tutorial August 22, 2024
solidity

  • 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: