Collating on Bifrost (EN)

tags: Wiki

Run a Collator node

Apply as Candidate

extrinsic

event

Download Chain Spec

• Rococo chain spec: rococo-local.json
• Bifrost chain spec: bifrost-stage.json

Run Collator Node

/path/to/bifrost --collator --force-authoring \
--chain ./bifrost-stage.json \
--base-path <DATA_PATH> \
--ws-port=9944 \
--port=30333 \
--state-cache-size 0 \
-- \
--chain ./rococo-local.json \
--execution wasm

Set SessionKey

Bond more by self

extrinsic

event

after 2 rounds the new collator begin produce blocks and receive Rewards

Bifrost Collator OBT Parameters and Rules

Objective

The Collator Pre test facing all node service operators, individual node operators and Delegators, to prepare for the official launch of the decentralized Bifrost Collator. Therefore, Bifrost Fundation is offering a total of 20,000 BNC rewards for this event, which will be shared among all Collators and Delegators, and the event will last for 2 weeks.

Event overview

• Duration
  14 days (starts from February 14th)
• Test BNC Faucet: TG Faucet
  Each TG account can claim 25 BNC in every 12 hours.

*Please note that all "BNC" mentioned in this article are under Bifrost Pre environment, not formal mainnet Token, except for the 20,000 BNC in the "Rewards" section.

Event Rewards

• Total Rewards: 20,000 BNC (Mainnet Token)
  Divide the mainnet BNC rewards according to the number of test BNC obtained in this event.
• Reward Query: Reward Leaderboard
  Publicize on Telegram Group, interact with the faucet, enter /top to query the top 30 rankings, /rank to query your own rewards.

Hareware 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 recommends using an SSD that supports the NVMe protocol.

Operating Procedures

• Delegator

  1. Create a BNC Address in the Bifrost pre-production environment (wss://bifrost-rpc.testnet.liebi.com/ws)
  2. Receive faucet test BNC: https://t.me/bifrost_faucet, Send: !drip <YOUR_ADDRESS>
  3. Enter Bifrost Dapp and delegate a Collator

• Collator:

  1. Create a BNC Address in the Bifrost pre-production environment (wss://bifrost-rpc.testnet.liebi.com/ws)
  2. Receive faucet test BNC: https://t.me/bifrost_faucet, Send: !drip <YOUR_ADDRESS>
  3. Run Collator Node & Map SessionKey: Guidance
  4. Check your Collator at Bifrost Dapp / Telemetry
  5. Get Delegating
  6. Successfully generate blocks and enter the active Collator set to get Commission rewards

Operation Cycle

The Collator system has its own running cycle, 150 blocks in a round, each round takes about 0.5 hours, and the cycle is related to the operations of reward settlement, addition, and unbonding.

Variable	Parameter
Join/Leave Candidate Pool	24 rounds (12 hours)
Add/Remove Nominations	24 rounds (12 hours)
Reward distribution (after the current round)	2 rounds (1 hour)

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 out of Active set.
• Collator Self-bond
  Self-bond as least 50 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

Collator	Stage 0	Stage 1	Stage 2
Candidate	unlimited	unlimited	unlimited
Active Collator	16	32	64

• Bonding parameters (Collator)

BNC Staking Conditions	Quantity
Candidate minimum bond (self bond)	50 BNC
Collator maximum bond (self bond)	Unlimited
Minimum Total Delegating Amount (Delegating)	100 BNC

• Others

Variable	Parameter
Collator entry/exit	Entry/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

Delegator

• Bonding parameters (Delegator)

Delegating Conditions	Quantity
Minimum Delegating Amount	5 BNC
Maximum Delegating Quantity	Unlimited

• Others

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

Collator Pre incentive ratio

Total 800,000 test BNC/Year	Proportion
Collator Commission	40%
Delegator	60%