Smart Contracts Programming Tutorials, Guides & Best Practices

  <dependency>
    <groupId>org.web3j</groupId>
    <artifactId>core</artifactId>
    <version>4.8.7</version>
  </dependency>

• Website: web3j

• Description: A cross-chain data oracle platform that connects smart contracts with external data.
• Key Features:
• Aggregates data from multiple sources to ensure accuracy and reliability.
• Supports interoperability across different blockchains.
• Provides customizable data feeds for various use cases.
• Fast and efficient, with a focus on low latency.
• Website: Band Protocol

• Description: A self-sovereign identity platform that allows users to control their identity and data.
• Key Features:
• Decentralized identity management using Ethereum and IPFS.
• Supports digital signatures, verifiable credentials, and authentication.
• Enables secure and private interactions with DApps.
• Integrates easily with existing DApps and platforms.
• Website: uPort

     mkdir my-token
     cd my-token

• Initialize a new Hardhat project:

• ERC20: Standard interface for fungible tokens.

• ERC721: Standard interface for non-fungible tokens (NFTs).

• Gas Limit: The maximum amount of gas a user is willing to spend on a transaction.
• Gas Price: The amount of Ether a user is willing to pay per unit of gas.
• Gas Cost: The total amount of gas consumed by a transaction, multiplied by the gas price, determines the total fee paid.

Why Gas Matters: