# Smart contracts

The ZeroLabs tokenization protocol uses a number of smart contracts to achieve issuing Green NFT.

Currently, we use the following smart contracts:

{% content-ref url="smart-contracts/batch-factory" %}
[batch-factory](https://docs.zerolabs.green/zerolabs-tokenization-module/domain-definitions/smart-contracts/batch-factory)
{% endcontent-ref %}

{% content-ref url="smart-contracts/certificate-registry" %}
[certificate-registry](https://docs.zerolabs.green/zerolabs-tokenization-module/domain-definitions/smart-contracts/certificate-registry)
{% endcontent-ref %}

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