Examples¶

Learn Calimero by exploring working examples. All examples include source code, README files, and Merobox workflow configurations.

Core Apps Examples¶

Core Apps Examples — Reference implementations from core/apps demonstrating SDK patterns and CRDT usage.

These examples live in calimero-network/core/apps:

kv-store - Basic CRDT operations, key-value storage
blobs - File/blob management with content addressing
collaborative-editor - Text collaboration with RGA CRDT
private-data - Private storage patterns
team-metrics - Nested CRDT structures
xcall-example - Cross-context communication

Quick start:

$: cd core/apps/kv-store && chmod +x build.sh && ./build.sh
> ...
> Finished `app-release` profile [optimized] target(s) in 14.04s

$: meroctl --node node1 app install --path res/kv_store.wasm
> ╭───────────────────────────────────────────────────────────────────────────────────╮
> │ Application Installed                                                             │
> ╞═══════════════════════════════════════════════════════════════════════════════════╡
> │ Successfully installed application 'A1fKrY7kkbqiJJU9oaG65NPRw2MCvrNESs31ERqg7gLo' │
> ╰───────────────────────────────────────────────────────────────────────────────────╯

Application Examples¶

For complete applications, see:

Battleships - Multiplayer game - battleships repository
KV Store - Template app - Created via npx create-mero-app

By Complexity¶

Examples organized by difficulty:

Starter: Basic CRDT usage (kv-store, counters)
Intermediate: Event handling, blob management, nested structures
Advanced: Cross-context calls, complex state machines

Getting Started with Examples¶

Clone or browse the repository
Read the README for setup instructions
Run ./build.sh or pnpm run logic:build
Install on a local node using meroctl
Explore the code and adapt patterns to your app

See Getting Started for installation and setup.