[🌐KR](<https://synctree-guide.notion.site/Block-Store-KR-388385d886484f1ab908bdb293102541>)

This document introduces how to subscribe to and download Block Packages registered in the Block Store and utilize them in BizUnit.

• Index

▶ Overview

1) What is Block Store?

• Block Store is a system that manages services provided in API format from various platforms such as public data, finance, my data, and payment in the form of Block Packages that can be used in SyncTree through Block Coding.
• Block Packages can be used for free or for a fee depending on the usage fee policy registered by the Block Provider.
• Billing for Block Packages is calculated by counting 1 call when the service (BizUnit) that used the Block is actually called.

2) Terminology

• Block : An application implemented as a block for a specific service (API).
• Block Package : A collection of Blocks provided as a service by grouping them by function and purpose.
• Block Provider : The producer of Blocks and Block Packages.
• Block Store : A page where users can check the Block Packages registered by the Block Provider, accessed through SyncTree Studio.

3) Block Store Flow

• Step 1 : Block Provider registers Block Packages in the Block Store.
• Step 2 : SyncTree users subscribe to and download Block Packages in the Block Store.