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Environment Variables in Solana Programs

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Content Objectives Progress

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Objectives

By the end of this lesson, you'll be able to:

Define program features in the `Cargo.toml` file
Use the Rust `cfg` attribute to conditionally compile code based on which features are or are not enabled
Use the Rust `cfg!` macro to conditionally compile code based on which features are or are not enabled
Create an admin-only instruction to set up a program account that can be used to store program configuration values

Progress

Environment variables in Solana programs

Lab: Create feature flags to help test locally

Solana Pay

Lab: Use QR codes to create payment requests

Versioned transactions and lookup tables

Lab: Using a lookup table to handle many accounts in a single transaction

Rust procedural macros

Lab: Use Rust macros to generate program code

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