# Overview

Our Developer Guides are designed to help get you familiarized with Tilia concepts
and give you a quick approach to getting up and running. For detailed information
on our endpoints, check out our [API Reference](/api-intro).

These guides are divided into the following sections:

### Use cases

Our [Use cases](/guides/use_cases) topic describes how Tilia services can be applied to support
common use cases in your application with code examples that you can run.

### Tutorials

Our [Tutorials](/tutorials) demonstrate common scenarios
with code that uses our APIs and user interfaces.

### Managing Users

The [User account tutorials](/tutorials/user-accounts)
demonstrate common user account interactions.

For information about more advanced user account interactions, visit:

- [Blocking/unblocking user accounts](/guides/block-and-unblock)
- [Registering entities](/guides/register-entities)


### Processing Transactions

Tilia uses the concept of invoices to form the basis of Tilia transactions.
These guides show you how to create and manage each of the supported invoice types:

- **Standard invoice**: A standard purchase invoice involves collecting funds from the buyer and
transferring them directly to the recipient or seller.
Standard invoices work well in standard payment processing applications.
- **Escrow invoice**: An escrow purchase invoice involves collecting funds from the buyer and
holding them in an escrow account, until an agreed-upon condition is met.
Once escrowed, funds can either be transferred to the seller, or refunded back to the buyer.
Escrow invoices are commonly used with non-fungible tokens (NFTs) and products on a blockchain.
- **Virtual token purchase**: This type of invoice enables a user to purchase tokens
from you for use in other transactions.
Tokens can be spent using both standard invoices or escrow invoices.
- **Virtual token conversion**: This is a special type of invoice that can be used to exchange
a user's convertible tokens to fiat currency.
Refer to [Virtual Tokens](../../core-concepts/virtual-tokens) for more information.
- **Payout**: Payout invoices are used to request that funds be transferred from a user's fiat wallet
to an external account (e.g. PayPal.) Refer to [Payouts](../../core-concepts/payouts) for more information.


For examples that show the details of common transactions found in an application,
visit [Transaction tutorials](/tutorials/transactions).

For more advanced examples of integrating transactions into a web interface,
visit:

- [User-to-Integrator Purchase](/guides/user-to-integrator)
- [User-to-User Purchase](/guides/user-to-user)
- [Multi-seller Purchase](/guides/multi-seller-transaction)
- [Escrow transaction](/guides/escrow-transaction)