# 15-1 Core Data : On-Blockchain Data

Sales-related transactions on DonaBlock are recorded on blockchain. This includes all of the inter-account transaction activities such as deal agreements between suppliers and volunteer in smart contract form, and purchases from customers, which is an essential and critical part of commerce. Such core transaction data is recorded on blockchain in the form of DonaBlock Token transaction between accounts, and additional references such as detailed deal contents, customer behavior data and personal information of customers, etc., are encrypted and stored on a separate distributed repository.

<figure><img src="/files/K1kwCFRyMQE8KGsspflP" alt=""><figcaption><p>On-Blockchain Data</p></figcaption></figure>


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