# Overview

Brotocol's core on-chain functionalities are implemented through a set of smart contracts deployed on Stacks and EVM-compatible networks (see complete list of EVM chains [here](/developers/deployments/chains/evm/ethereum-contract-addresses.md)).

Their primary function is to provide a bridging mechanism, allowing the movement of assets between Bitcoin and other DeFi blockchain ecosystems. Additional features include Bitcoin swaps, cross-chain liquidity aggregation, integration of staking protocols and the Brotocol Governance System.

The subsections below describe the purpose, scope and interactions of the Brotocol contracts. Each subsection provides a detailed overview of each smart contract and its main variables, features, error codes and events.

## Chains

{% content-ref url="/pages/8Fa7T509jq5mqNYBWEct" %}
[Stacks](/developers/brotocol-contracts/chains/stacks.md)
{% endcontent-ref %}

{% content-ref url="/pages/WrVUBRpUgwblfhTBLzaU" %}
[EVM](/developers/brotocol-contracts/chains/evm.md)
{% endcontent-ref %}


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