> For the complete documentation index, see [llms.txt](https://docs.suno.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.suno.finance/misc/protocol-implementation.md).

# Protocol implementation

The Suno Protocol is implemented by a set of smart contracts written in the [Solidity language](https://soliditylang.org/), and deployed to the [Polygon blockchain](https://polygon.technology/).

<table><thead><tr><th width="190.30550130208331">Contract Name</th><th width="209.6011962890625">Address</th><th width="349.9342447916667">Description</th></tr></thead><tbody><tr><td><code>ERC20UWatt</code></td><td><a href="https://polygonscan.com/address/0xdD875635231E68E846cE190b1396AC0295D9e577#code"><code>0xdD875635231E68E846cE190b1396AC0295D9e577</code></a></td><td>Implements the <strong>uWatt</strong></td></tr><tr><td><code>ERC20Project</code></td><td>(new instance for every specific Project)</td><td>Implements the <strong>pWatt</strong></td></tr><tr><td><code>PermissionGranter</code></td><td><a href="https://polygonscan.com/address/0x914dD40254151d4b7b9Ff4Ac8E7fbAd0A603CC62#code"><code>0x914dD40254151d4b7b9Ff4Ac8E7fbAd0A603CC62</code></a></td><td>Manages permissions and roles within the Suno Protocol</td></tr><tr><td><code>UnergyData</code></td><td><a href="https://polygonscan.com/address/0xFF772af2fADA9992950FDc53454b2571cbc9865b#code"><code>0xFF772af2fADA9992950FDc53454b2571cbc9865b</code></a> (proxied / upgradable)</td><td>Implements the state variables of the Suno Protocol.</td></tr><tr><td><code>UnergyBuyer</code></td><td><a href="https://polygonscan.com/address/0xD2DCFe4C5D3f101dd1fb45368054e9606a8dbb09#code"><code>0xD2DCFe4C5D3f101dd1fb45368054e9606a8dbb90</code></a>(proxied / upgradable)</td><td>This contract handles interactions with Project installer, manages their payments, and also holds <mark style="color:green;">pWatts</mark> to generate profits for investors.</td></tr><tr><td><code>UnergyLogicReserve</code></td><td><a href="https://polygonscan.com/address/0x6464C0D320599d2E8c2ee3b1E0331Ef8D5bbe035#code"><code>0x6464C0D320599d2E8c2ee3b1E0331Ef8D5bbe035</code></a> (proxied / upgradable)</td><td>This contract handles the energy reporting and the related payments. It also manages the rewards for the <strong>uWatt</strong> holders.</td></tr><tr><td><code>ProjectsManager</code></td><td><a href="https://polygonscan.com/address/0x759676E6F357e4dAE6ee80389DF529b9bf5f74C5#code"><code>0x759676E6F357e4dAE6ee80389DF529b9bf5f74C5</code></a> (proxied / upgradable)</td><td>This contract manages the project-related operations and stores the data related to them</td></tr><tr><td><code>UnergyEvent</code></td><td><a href="https://polygonscan.com/address/0x2E3EE95b3B81712ADD85586EA4F050B0D519Fbe2#code"><code>0x2E3EE95b3B81712ADD85586EA4F050B0D519Fbe2</code></a></td><td>This contract serves as an events router that helps keep track of token movements</td></tr><tr><td><code>CleanEnergyAssets</code></td><td><a href="https://polygonscan.com/address/0x000af4074329b2Ce9805057069401a99Df5a1816#code"><code>0x000af4074329b2Ce9805057069401a99Df5a1816</code></a></td><td>This contract handles the logic to keep track of energy generation and generate Renewable Energy Certificates</td></tr></tbody></table>

{% hint style="info" %}
**Note:** The Suno Protocol was previously known as **Unergy**. The rebranding reflects the evolution of the project from a clean energy investment platform to a broader decentralized infrastructure protocol focused on energy-backed digital assets.
{% endhint %}


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