Smart Contracts Programming Tutorials, Guides & Best Practices

• 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

• Writing data to the blockchain is one of the most expensive operations. Whenever possible, minimize storage writes or combine them into a single operation.
• Example: Instead of updating multiple state variables individually, group them into a struct and update the struct in a single operation.

2. Use view and pure Functions

After testing your DApp locally, the final step is to deploy it to a public Ethereum test network like Ropsten or Kovan.

Steps to Deploy: