# nervosnetwork/ckb

The Nervos CKB is a public permissionless blockchain, and the layer 1 of Nervos network.

Repository: https://github.com/nervosnetwork/ckb
Canonical: https://ross.abutalabs.com/products/nervosnetwork-ckb
Homepage: https://www.nervos.org
Language: Rust
License: MIT
License Family: permissive
Topics: nervos, blockchain, ckb, rust
Last push: 2026-08-19T08:21:34+00:00

## Health v2 (maintenance only)
Score: 93/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 83, longevity 100
- inputs: {"age_days": 2844, "days_push": 14, "days_rel": 35, "gap_med": 41, "n_releases_24m": 14}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1219, forks 265 (observed 2026-08-28T04:04:01.699368+00:00)

## What it is
Nervos CKB (Common Knowledge Base) is the layer-1 public permissionless blockchain node implementation of the Nervos Network, written in Rust. It uses Proof of Work with an improved Nakamoto consensus and executes smart contracts via a RISC-V compatible virtual machine (CKB-VM).

## Use cases
- run a Nervos CKB full node
- participate in the Nervos network as a miner
- verify and settle layer-2 transactions on a layer-1 blockchain
- develop and test smart contracts on the CKB-VM
- query blockchain state via the CKB RPC API
- set up a private CKB devchain for development

## When to choose
- you need a layer-1 blockchain focused on verification and decentralization
- you want to run or mine on the Nervos Network
- you need a VM that supports scripting in any language via RISC-V
- you want a PoW chain with improved Nakamoto consensus throughput

## When to avoid
- you need an EVM-compatible chain or Ethereum tooling
- you want a proof-of-stake or permissioned blockchain
- you need heavy on-chain computation rather than verification
- you are not working with the Nervos ecosystem

## Facets
- artifact type: application
- maturity: active
- function: blockchain, cryptography, networking, cli
- domain: blockchain, microservices
- platform: windows, rust, cli
- tags: nervos, ckb, layer-1, proof-of-work, nakamoto-consensus, risc-v-vm, node, permissionless, cryptocurrency, linux, macos

## Member repositories
- nervosnetwork/ckb (main) score 93

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:01.699368+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:16:15.258415+00:00, confidence not recorded.
  - readme: https://github.com/nervosnetwork/ckb (fetched 2026-08-28T04:04:01.699368+00:00, sha 0fea1b5c543b)
  - registry_crates: https://crates.io/api/v1/crates/ckb (fetched 2026-08-29T12:25:02.263255+00:00, sha 9058c0ce5770)
- Data as of 2026-08-30T08:39:29.467469+00:00.