The Nervos CKB (Common Knowledge Base) is the Nervos Network's tier 1 proof of work public blockchain system. It enables smart contracts, layer 2 scalability, and captures the whole network value while storing any crypto-asset with the security, immutability, and permissionless characteristics of Bitcoin.The CKByte currency (CKB) is the network's native token, which can be used to store state on the network, compensate miners, and reward CKB holders for staking. CKB is also a utility token that can be used to pay transaction fees on the Nervos Network.