Full-Node Requirements

Full nodes share all the features of the basic nodes and additionally facilitate Cross-Chain Communication. To do that, they must keep access to external blockchains and off-chain data feed for price oracles. Full node rewards consist of:

• Self-staking rewards which accrue in proportion to the number of staked tokens

• Transaction fees

• Fees from cross-chain transactions

• A portion of nominators' staking rewards (optional)

Technical Requirements

For Native Hardware

Hardware	Minimum requirement
CPU	- x86-64 compatible - Intel Ice Lake, or newer (Xeon or Core series); AMD Zen3, or newer (EPYC) - Simultaneous multithreading disabled (Hyper-Threading on Intel, SMT on AMD) - Prefer single-threaded performance over a higher cores count
Storage	An NVMe SSD of 1 TB (As it should be reasonably sized to deal with blockchain growth)
RAM	32GB DDR4

For AWS Instances

Hardware	Minimum requirement
EC2	m5zn.2xlarge
VCPU	8
RAM	32GB
EBS	1TB (gp3)

Operating system requirements (Ubuntu 18.04 ~ 22.04 Recommended)

• Linux Kernel 5.16 or later

• Amazon Linux 2: 5.10.130-118.517.amzn2.x86_64 or later

Bonding Requirements

Testnet

Requirements	Amount
Minimum self-bond	100,000 BFC
Minimum voting power (self-bond + total nominated BFC)	100,000 BFC

Mainnet

Requirements	Amount
Minimum self-bond	400,000 BFC
Minimum voting power (self-bond + total nominated BFC)	4,000,000 BFC

Operating Requirements

Account Management

Validators should securely manage three accounts, Stash, Controller, and Relayer accounts, for self-bonding deposit and consensus participation, respectively.

• Stash account: An EVM account for the self-bonding deposit.

• Controller account: An EVM account for consensus participation. It should have enough balance for transaction fees used in operations.

• Relayer account: An EVM account for cross-chain action participation. It should have enough balance for transaction fees used in operations.

Required Credentials

Validators require three types of keys as follows:

• AURA key for block production

• GRANDPA key for block finalization

• “Imonline” key to check the node availability

External Source Access

Full nodes should set up Web3 providers to all the external blockchains supported by the Bifrost Network via reusing their blockchain RPC nodes or employing external services (e.g. Infura or NodeReal).

Price Feed

The full-node validators collect on-chain and off-chain data for price oracles.

• On-chain price feed: ChainLink

• Off-chain API: CoinGecko, Upbit, Binance, Gate.io, Kucoin