# About Pontis

**Pontis** is an innovative bridge designed to seamlessly connect the Bitcoin ecosystem. The initial version focuses on integrating **Runes** and **BTC as Pontis BTC** on Stacks and EVM networks, along with bridging **SIP10 <> ERC20 tokens**. Pontis enhances the utility and accessibility of Bitcoin assets, creating new opportunities for decentralized finance and asset management.

### Features

#### Bitcoin Asset Integration

Pontis bridges key assets across ecosystems, including:

* **Runes**
* **BRC-20**
* **Ordinals**
* **BTC as Pontis BTC**
* **SIP10 <> ERC20 tokens**

{% hint style="info" %}
When **sBTC** becomes live on the Stacks mainnet:

> * All **Pontis BTC tokens** will be converted to sBTC.
> * The **Pontis BTC bridge to Stacks** will be decommissioned.
> * On EVM networks, **Pontis BTC** will also transition to sBTC once the protocol goes live.
>   {% endhint %}

### Roadmap

#### Current and Upcoming Goals

| **Feature**              | **Status**  | **Details**                                                                        |
| ------------------------ | ----------- | ---------------------------------------------------------------------------------- |
| Support for **Runes**    | Live        | Full support for Runes bridging on Stacks and EVM.                                 |
| Support for **sBTC**     | In Progress | Pontis BTC migration to sBTC upon its deployment on Stacks mainnet.                |
| Expand **BRC20** support | Planned     | Support for BRC20 token integration to unlock more Bitcoin asset capabilities.     |
| Ordinals integration     | Planned     | Enable bridging of Bitcoin Ordinals across chains.                                 |
| Additional L2s           | Planned     | Integration with non-EVM Bitcoin Layer 2s, Ethereum, Solana, and other ecosystems. |

### Security Model

Pontis employs a robust security architecture based on a multisignature setup across all connected networks. Each multisig participant functions as an independent node, responsible for validating and verifying every bridging transaction. Once a transaction is approved, the node signs it, ensuring a secure and decentralized process.

The nodes participating in the multisig setup are established and reputable projects from the Bitcoin and Stacks ecosystems. These projects include:

{% tabs %}
{% tab title="First Phase" %}

* [**Asigna**](https://www.asigna.io)
* [**Bima**](https://www.bima.money)
* [**BILLION•DOLLAR•CAT**](https://www.billiondollarcat.com)
* [**Bitflow**](https://www.bitflow.finance)
* [**DeSpread**](https://www.despread.io)
* [**Ducat**](https://docs.ducatprotocol.com)
* [**Hermetica**](https://www.hermetica.fi)
* [**Leather**](https://www.leather.io)
* [**Liquidium**](https://app.liquidium.fi/lend)
* [**OrdinalsBot**](https://www.ordinalsbot.com)
* [**Pontis**](https://www.pontis.io)
* [**Sats Ventures**](https://www.satsventures.com)
* [**StackingDAO**](https://www.stackingdao.com)
* [**Xverse**](https://www.xverse.app)
* [**Zest**](https://www.zestprotocol.com)
  {% endtab %}

{% tab title="Second Phase" %}
To be updated
{% endtab %}
{% endtabs %}

#### Transition to Trustlessness

Pontis will transition from multisig to a **Threshold Signature Scheme (TSS)**, enabling:

* **Full decentralization** of the signature process.
* Elimination of reliance on trusted participants.
* Enhanced security for bridging operations.

### Bridging Details

#### Minimum Bridging Amounts

| **Asset** | **Minimum Amount** |
| --------- | ------------------ |
| BTC       | 0.001 BTC          |
| Runes     | Varies by token    |

***

#### Fees

| **Operation**     | **Fee Structure**    |
| ----------------- | -------------------- |
| **BTC Peg-in**    | `0.1% + 0.0001 BTC`  |
| **BTC Peg-out**   | `0.1% + 5 STX`       |
| **Runes Peg-in**  | `0.25% + 0.0001 BTC` |
| **Runes Peg-out** | `0.25% + 5 STX`      |

{% hint style="info" %}
The fees cover:

1. Costs for operations on both ends of the bridge.
2. Support for ongoing development of the Pontis bridge.
   {% endhint %}