---
title: Memory Store
description: In-memory store for development and testing.
---

The memory store provides a full `store.Store` implementation backed by Go maps and `sync.RWMutex`. It requires no external dependencies and is ideal for testing and development.

## Setup

```go
import "github.com/xraph/keysmith/store/memory"

store := memory.New()
```

## Features

- Implements the complete `store.Store` composite interface (keys, policies, scopes, usage, rotation)
- Thread-safe via `sync.RWMutex`
- O(1) key lookup by hash via secondary index
- Key-scope junction tracking for scope assignment
- No external dependencies

## Usage with the engine

```go
eng, err := keysmith.NewEngine(keysmith.WithStore(memory.New()))
```

## Limitations

- Data is lost when the process exits
- Not suitable for production use
- No persistence, replication, or backup support
- Single-process only (no multi-instance coordination)

## When to use

| Scenario | Recommended |
| -------- | ----------- |
| Unit tests | Yes |
| Integration tests | Yes |
| Local development | Yes |
| CI pipelines | Yes |
| Production | No -- use PostgreSQL |