Sway is a language purpose-built for blockchains. It combines the best of Solidity and Rust, providing a full suite of tools for creating secure, high-performance Dapps. 🧵.

Sway brings clarity to smart contracts, so you spend less time debugging and more time building 🌴.

RT @fuel_network: The coolest CLOB will be on @o2dotapp and it will be: . ⚡️Privacy-enabled.⚡️Focused on spot (first).⚡️Expanding to perps,….

RT @fuel_network: build without compromise ⛽️.

Use cases? Think gas-optimized workflows, multicall setups, and custom logic offloaded from contracts. More in the docs 📘.

Here’s what a simple script looks like in Sway 👇

🛠 Key properties of a script:. ➡️ Can call contracts, but can't be called.➡️ Doesn’t store state or own assets.➡️ Reads state temporarily during execution.➡️ Great for batching multiple actions in a single transaction.

What are Scripts in Sway? 🌴. They’re one-shot programs that live only for the duration of a transaction perfect for bundling logic without persistent state. Let’s explore what makes them powerful 🧵.

📚 Below are additional resources. The Sway standard library is a great reference for more complex examples on how to build a library, and the full FuelVM instruction set includes most of the instructions you’d find in the EVM plus more!. ➡️ Sway standard library examples:.

Want to return multiple values? You can modify a tuple within the assembly block:

🔍 Understanding the asm Block:. This simply uses the add instruction to add one to register r1 and stores the result in register r2, then returns it. The return register is specified at the end, after all assembly instructions. It consists of the register name and optional.

Here's how it looks in Sway:

✅ Just like Solidity, Sway also has assembly blocks:. But the main user facing form is asm {}

🔧 Why use Assembly?. ➡️ Gas Optimization: Writing logic directly in asm blocks reduces gas costs by avoiding high-level abstractions. ➡️ Low-Level Control: Direct access to FuelVM instruction set perfect for library authors or power users who need custom memory management or.

Assembly in Sway is optional, but it's there when you need to squeeze out every bit of performance and take direct control of the FuelVM. Let's break it down 🧵.

Advantages over Solidity.✅ Explicit, strong typing for keys and values. ✅ Clear, compiler-enforced storage read/write annotations. Learn more:.

Nested StorageMaps:

Multi-Key & Nested Maps. Tuples as keys:

Reading Values. Safe reads with built-in fallback handling through Option<V>.

Inserting Values. Explicitly annotate functions with #[storage(write)] for storage modifications.

Declaration & Initialization. No extra imports or explicit mutability needed, storage variables are inherently mutable.