Linera is a decentralized blockchain infrastructure designed to support highly scalable, low-latency Web3 applications. In this article, we will explore how to set up and use Linera, especially focusing on the Linera service CLI. Let’s dive into the details!

Understanding the Repository Structure

The Linera repository contains several crates and directories, essential for the functionality of the protocol. Here’s a breakdown:

• linera-base: Base definitions, including cryptography.
• linera-version: A library to manage version info in binaries and services.
• linera-views: A library mapping complex data structures onto a key-value store.
• linera-execution: Persistent data and runtime logic for Linera applications.
• linera-chain: Logic for chains of blocks and cross-chain messaging.
• linera-storage: Defines the storage abstractions for the protocol.
• linera-core: Core protocol logic, including client and server functionalities.
• linera-rpc: Defines data types for RPC messages and tracks data schemas.
• linera-service: Executable for clients, proxies, and servers.
• linera-sdk: Library to develop Linera applications written in Rust.
• examples: Examples of Linera applications written in Rust.

Quickstart with the Linera Service CLI

Let’s get you started with a local test network and explore various functionalities using the Linera service CLI. Follow these steps:

# Compile the Linera binaries
cargo build -p linera-service --bins

# Add them to your PATH
export PATH=$PWD/target/debug:$PATH

# Import the optional helper function
source dev/stdin $(linera net helper 2>/dev/null)

# Run a local test network
linera_spawn_and_read_wallet_variables linera net up

# Print the set of validators
linera query-validators

# Query the chain balance of chains
CHAIN1=e476187f6ddfeb9d588c7b45d3df334d5501d6499b3f9ad5595cae86cce16a65
CHAIN2=256e1dbc00482ddd619c293cc0df94d366afe7980022bb22d99e33036fd465dd
linera query-balance $CHAIN1
linera query-balance $CHAIN2

# Transfer 10 units then 5 back
linera transfer 10 --from $CHAIN1 --to $CHAIN2
linera transfer 5 --from $CHAIN2 --to $CHAIN1

# Query balances again
linera query-balance $CHAIN1
linera query-balance $CHAIN2

Understanding the Code: An Analogy

Imagine Linera as a bustling city where each transaction is like a courier delivering packages. The lines of code you just saw are the instructions for setting up a distribution center in this city, where packages (value) will be sent from one address (chain) to another. You first build the center (compile binaries) and establish a connection (set up the network). Next, you determine the couriers (validators) who will facilitate the deliveries. Once set up, you can check the balance of each address (query balances) and issue commands to send packages from one to another (transfers). Just as in a real city, efficiency and reliability are key!

Troubleshooting and Support

If you encounter any issues during the setup or while executing commands, here are some troubleshooting tips:

• Ensure you have all dependencies installed correctly. Missing libraries can cause compilation errors.
• If you’ve modified environment variables, double-check their values and make sure they’re exported correctly.
• For issues with network setup, review your configurations for any typos or incorrect settings.
• For Service CLI commands failing, verify that you are in the correct directory and have the necessary permissions.
• If the problem persists, consult the community or visit the developer manual.

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Conclusion

In conclusion, Linera offers a robust solution for developers looking to build scalable and efficient Web3 applications. By following the steps outlined in this article, you can swiftly get started and explore the full potential of the Linera protocol.

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.