AZLE — TYPESCRIPT ON ICP

Azle is a TypeScript/JavaScript framework for building ICP canisters. It brings the familiar JavaScript ecosystem to blockchain development.

WHY AZLE:

1. Write canisters in TypeScript

2. Use npm packages

3. Familiar JavaScript tooling

4. Full Candid type generation

5. React-like frontend integration

BASIC EXAMPLE:

import { query, update, StableBTreeMap } from azle;

let counter: StableBTreeMap = new StableBTreeMap(counter, 0, 100, 1000);

#[update]

function increment(): void {

counter.insert(count, (counter.get(count) ?? 0n) + 1n);

}

#[query]

function getCount(): bigint {

return counter.get(count) ?? 0n;

}

KEY FEATURES:

1. StableBTreeMap: Persistent key-value storage

2. ManagementCanister: Direct access to IC management

3. HttpTypes: HTTP outcall support

4. Candid: Automatic type generation

5. Test framework: azle test

WHEN TO USE AZLE:

- Full-stack TypeScript developers

- Projects needing npm ecosystem

- Rapid prototyping

- Teams with JavaScript backgrounds

- Projects requiring complex frontend-backend integration

AZLE vs MOTOKO vs RUST:

Azle is easiest for JavaScript developers. Motoko is best for ICP-native development. Rust offers the most performance and control.

This makes ICP accessible to the millions of JavaScript developers worldwide.

Next: Part 24 — Frontend Development

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