# Requirement

### Hardware Requirements

**System: Ubuntu 20.04**

* **CPU** - 4 core (3.2GHZ above)
* **Memory** - 16GB
* **Storage** - 200GB SSD
* **Bandwidth** - 10 Mbps above

**Tip**: CPU frequency lower than 3.2GHZ may affect the normal block generation of collator. Storage recommendation is using an SSD that supports the NVMe protocol.

### Operating System

`Ubuntu 20.04 LTS`

(Bifrost binary can only run on Ubuntu 22.04, you can use docker when you have other linux system. )

### Operating Procedures

{% tabs %}
{% tab title="Polkadot Mainnet" %}

* **Delegator**
  1. Create a BNC Address via [Polkadot.js](https://polkadot.js.org/apps/?rpc=wss://bifrost.bifrost-staking-test.liebi.com/ws#/explorer)
  2. Enter the Bifrost Dapp (**Mainnet**) and delegate to a Collator
* **Collator**:
  1. Create a BNC Address via [Polkadot.js](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fhk.p.bifrost-rpc.liebi.com%2Fws#/explorer)
  2. Run Collator Node & Map SessionKey in [Bifrost Mainnet](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fhk.p.bifrost-rpc.liebi.com%2Fws#/explorer): [Guidance](https://docs.bifrost.io/for-collators/run-a-collator)
  3. Check your Collator at <https://app.bifrost.io/collator> (switch to Bifrost Polkadot Mainnet)
  4. Get Delegating
  5. Successfully generate blocks and enter the active Collator set to get Commission rewards
     {% endtab %}

{% tab title="Stagenet" %}

* **Delegator**
  1. Create a BNC Address
  2. Receive faucet test BNC: <https://t.me/bifrost_faucet>
  3. Enter Bifrost Dapp (switch to **Bifrost Stage Network**) and delegate a Collator
* **Collator**:
  1. Create a BNC Address
  2. Receive faucet test BNC: <https://t.me/bifrost_faucet>
  3. Run Collator Node & Map SessionKey in the Bifrost pre-production environment (wss\://bifrost-rpc.testnet.liebi.com/ws): [Guidance](https://docs.bifrost.io/for-collators/run-a-collator)
  4. Check your Collator at [Bifrost Dapp](https://bifrost.app/collator) (switch to **Bifrost Stage Network**)/ [Telemetry](https://telemetry.polkadot.io/#list/0x9f28c6a68e0fc9646eff64935684f6eeeece527e37bbe1f213d22caa1d9d6bed)
  5. Get Delegating
  6. Successfully generate blocks and enter the active Collator set to get Commission rewards
     {% endtab %}
     {% endtabs %}

### Operation Cycle

The Collator system has its own running cycle, **600 blocks in a round**, each round takes about 2 hours, and the cycle is related to the operations of reward settlement, addition, and unbonding.

{% tabs %}
{% tab title="Polkadot Mainnet" %}

<table><thead><tr><th width="150">Variable</th><th>Parameter</th></tr></thead><tbody><tr><td>Leave Candidate Pool</td><td>84 rounds (168 hours)</td></tr><tr><td>Remove Nominations</td><td>84 rounds (168 hours)</td></tr><tr><td>Reward distribution (after the current round)</td><td>2 rounds (4 hour)</td></tr></tbody></table>
{% endtab %}

{% tab title="Stagenet" %}

| Variable                                      | Parameter            |
| --------------------------------------------- | -------------------- |
| Leave Candidate Pool                          | 24 rounds (12 hours) |
| Remove Nominations                            | 24 rounds (12 hours) |
| Reward distribution (after the current round) | 2 rounds (1 hour)    |
| {% endtab %}                                  |                      |
| {% endtabs %}                                 |                      |

### Basic Parameters

#### Glossary

* **Collator:** Collator runs a full node on Bifrost parachain and Kusama relay-chain, and produce the state transition proof for relay chain validators.
* **Active set:** A set of Collators who can receive commission by producing blocks, choosen by the ranking of delegating amount.
* **Candidates:** Collators who are out of the active set.
* **Collator self bond:** Self-bond as a minimum BNC to be a Collator, continue self-bond same as delegating.
* **Delegator:** Bifrost token holders who stake tokens, vouching for specific collator candidates on the parachain.
* **Delegate:** Bond BNC Token for Bifrost Collators, receiving delegating rewards depends on the rank of Collator and delegating amount.

#### Collator

* Maximum number of active Collators and candidates

{% tabs %}
{% tab title="Polkadot Mainnet" %}

| Collator        | Stage 0   |
| --------------- | --------- |
| Candidate       | Unlimited |
| Active Collator | 8         |
| {% endtab %}    |           |

{% tab title="Stagenet" %}

| Collator        | Stage 0   | Stage 1   | Stage 2   |
| --------------- | --------- | --------- | --------- |
| Candidate       | Unlimited | Unlimited | Unlimited |
| Active Collator | 16        | 32        | 64        |
| {% endtab %}    |           |           |           |
| {% endtabs %}   |           |           |           |

* Bonding parameters (Collator)

{% tabs %}
{% tab title="Polkadot Mainnet" %}

| BNC Staking Conditions                                           | Quantity  |
| ---------------------------------------------------------------- | --------- |
| Candidate minimum bond (self bond)                               | 5,000 BNC |
| Collator maximum bond (self bond)                                | Unlimited |
| Minimum Total Delegating Amount for Active Collator (Delegating) | 5,000 BNC |
| {% endtab %}                                                     |           |

{% tab title="Stagenet" %}

| BNC Staking Conditions                                           | Quantity  |
| ---------------------------------------------------------------- | --------- |
| Candidate minimum bond (self bond)                               | 100 BNC   |
| Collator maximum bond (self bond)                                | Unlimited |
| Minimum Total Delegating Amount for Active Collator (Delegating) | 100 BNC   |
| {% endtab %}                                                     |           |
| {% endtabs %}                                                    |           |

* Others

{% tabs %}
{% tab title="Polkadot Mainnet" %}

| Variable                     | Parameter                                                                               |
| ---------------------------- | --------------------------------------------------------------------------------------- |
| Collator exit                | 84 rounds                                                                               |
| Maximum number of delegators | Unlimited                                                                               |
| Add self bond                | Effective immediately                                                                   |
| Reduce self bond             | 84 rounds                                                                               |
| Reward distribution          | Collectors receive rewards for the first 2 rounds at the end of each round (600 blocks) |
| Punishment                   | No Penalty, reward deduction if there is missing for effective block producing.         |
| {% endtab %}                 |                                                                                         |

{% tab title="Stagenet" %}

| Variable                     | Parameter                                                                               |
| ---------------------------- | --------------------------------------------------------------------------------------- |
| Collator exit                | Exit every 24 rounds                                                                    |
| Maximum number of delegators | Unlimited                                                                               |
| Add self bond                | Effective immediately                                                                   |
| Reduce self bond             | 24 rounds                                                                               |
| Reward distribution          | Collectors receive rewards for the first 2 rounds at the end of each round (150 blocks) |
| Punishment                   | No Penalty                                                                              |
| {% endtab %}                 |                                                                                         |
| {% endtabs %}                |                                                                                         |

#### Delegator

* Bonding parameters (Delegator)

{% tabs %}
{% tab title="Polkadot Mainnet" %}

| Delegating Conditions       | Quantity  |
| --------------------------- | --------- |
| Minimum Delegating Amount   | 50 BNC    |
| Maximum Delegating Quantity | Unlimited |
| {% endtab %}                |           |

{% tab title="Stagenet" %}

| Delegating Conditions       | Quantity  |
| --------------------------- | --------- |
| Minimum Delegating Amount   | 5 BNC     |
| Maximum Delegating Quantity | Unlimited |
| {% endtab %}                |           |
| {% endtabs %}               |           |

* Others

{% tabs %}
{% tab title="Polkadot Mainnet" %}

| Variable                                      | Parameter                                                                                            |
| --------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
| Minimum delegating value that can be rewarded | No reward                                                                                            |
| Maximum number to delegate Collators          | 350                                                                                                  |
| Add Delegating                                | Effective immediately                                                                                |
| Reduce Delegating                             | 84 rounds                                                                                            |
| Revoke Delegating                             | 84 rounds, no minimum revoke limit (staking rewards continue to be received during unbonding period) |
| Reward automatic re-delegating                | Not available yet                                                                                    |
| {% endtab %}                                  |                                                                                                      |

{% tab title="Stagenet" %}

| Variable                                      | Parameter                                                                                                         |
| --------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- |
| Minimum delegating value that can be rewarded | The **top 100 Delegators** of each Collator can get the reward, more than 100 Delegators do not count the reward. |
| Maximum number to delegate Collators          | 100                                                                                                               |
| Add Delegating                                | Effective immediately                                                                                             |
| Reduce Delegating                             | 24 rounds                                                                                                         |
| Revoke Delegating                             | 24 rounds, no minimum revoke limit (no reward during the revoking period)                                         |
| Reward automatic re-delegating                | Not available yet                                                                                                 |
| {% endtab %}                                  |                                                                                                                   |
| {% endtabs %}                                 |                                                                                                                   |

#### Collator incentive ratio

{% tabs %}
{% tab title="Polkadot Mainnet" %}

| Total 98,550 BNC/6 months | Proportion |
| ------------------------- | ---------- |
| Collator Commission       | 10%        |
| Delegator                 | 90%        |
| {% endtab %}              |            |

{% tab title="Kusama Mainnet" %}

| Total 0 BNC/Year    | Proportion |
| ------------------- | ---------- |
| Collator Commission | 10%        |
| Delegator           | 90%        |
| {% endtab %}        |            |

{% tab title="Stagenet" %}

| Total 800,000 test BNC/Year | Proportion |
| --------------------------- | ---------- |
| Collator Commission         | 40%        |
| Delegator                   | 60%        |
| {% endtab %}                |            |
| {% endtabs %}               |            |

#### Reward Calculation

{% tabs %}
{% tab title="Kusama Mainnet" %}
Bifrost network reserved 5% (4,000,000 BNC) of total issurance to incentivize Collator mechanism for 5 years (800,000 BNC/year), with no inflation. The reward for each Round is a fixed 180 BNC. The reward calculation method is as follows.

According to the incentive ratio, the reward for each block is:

`Collator:`` `<mark style="color:blue;">`180/600*10% = 0.03 BNC`</mark>

`Delegator:`` `<mark style="color:blue;">`180/600*90% = 0.27 BNC`</mark>

If a collector's total delegating amount is 100,000 BNC and it is in the 64 Active Collator set for the whole year, the average revenue of the Collator is:

`Collating Reward:`` `<mark style="color:blue;">`800,000 x 10% / 64 = 1,250 BNC`</mark>

`Self-bond delegating Reward:`` `<mark style="color:blue;">`800,000 x 90% / 64 x 5,000/100,000 = 562.5 BNC`</mark>

`Total Revenue:`` `<mark style="color:blue;">`1,250 + 562.5 = 1,812.5 BNC`</mark>

`APR:`` `<mark style="color:blue;">`1,812.5/5,000 = 36.25%`</mark>
{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.bifrost.io/for-collators/requirement.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.