CKB is a fully BTC-isomorphic public blockchain (PoW+UTXO), offering a programmable, interoperable, and scalable solution for the Bitcoin ecosystem, accelerating the path toward Web5.

CKB enhances Bitcoin's programmability and interoperability with RGB++, mapping Bitcoin UTXOs to CKB Cells for smart contract capabilities and bridgeless cross-chain transfers. CKB scales Bitcoin with Fiber Network, enabling seamless multi-asset flow within the Lightning ecosystem.

To accelerate Lightning Network adoption, CKB introduces UTXO Stack (providing improved liquidity and yield models) and USDI (a RGB++ stablecoin usable within Lightning). These infrastructures enable genuine peer-to-peer transactions, forming a cornerstone of the emerging Web5 vision on Bitcoin.

CKB mainnet launched in Nov. 2019 and completed its first mining reward halving in Nov. 2023.

Revenue and User Statistics 2024-12-31

$CKB Token Metrics as of 26/03/2025

  • Market Cap: $257,973,553

  • Fully Diluted Market Cap: $262,055,628

  • Circulating supply: 46,194,114,140 CKB

  • Total Supply: 46,925,681,649 CKB

  • Token Holders: 420460

Performance Highlights:

  • Meepo Hard Fork

    1. The Meepo Hard Fork went live on the CKB testnet in October 2024 and is expected on the mainnet in 2025. This upgrade introduces CKB-VM V2 and several enhancements to CKB script development, such as the “Spawn” syscall.

    2. Currently, developers rely on the 'exec' syscall in the CKB-VM to load and run external logic. However, the “exec” discards the calling script's state with each invocation, complicating workflows that rely on retaining or interacting with this state. The “Spawn” syscall addresses inefficiencies in cross-script interactions and modularity by enabling one script to directly invoke another. This resolves the complications created by the current syscall, as it allows the calling script to preserve its execution context when invoking another script, enabling developers to build more efficient and modular decentralized applications (dApps) on CKB.

  • USDI -  The first programmable stablecoin on Bitcoin

    1. An RGB++-enabled payment network on Bitcoin that deployed USDI in December 2024. USDI, the first programmable stablecoin on Bitcoin, is compliant with AML/KYC/CFT regulations and fully backed by IPN's reserves, which utilize high-credit and highly liquid assets, such as Matrixdock’s STBT. 

    2. As an RGB++ asset, it supports cross-chain transfers across connected UTXO-based chains. Furthermore, the Fiber Network will support it as the first stablecoin, enabling its introduction into Bitcoin’s Lightning Network through cross-chain atomic swaps.

  • RGB++ Layer

    1. In November 2024, the RGB++ Layer kicked off the integration with DOGE. This will extend BTCFi capabilities to UTXO-based chains by enabling support for programmable assets and cross-chain decentralized applications. 

    2. The CKBers’ Codebase (CCC) integrated with DOGE in December 2024, enabling interoperability between CKB and DOGE chains and providing the infrastructure necessary to support future capabilities.

Future Outlook:

  • Fiber Network

    1. Fiber Network is Nervos Network's payment channel solution compatible with Bitcoin's Lightning Network. It enables fast, low-cost multi-token transactions for RGB++ assets. Building on Lightning's foundation, Fiber incorporates payment channels and Hash Time-Locked Contracts while adding Multi-hop Routing and Watchtower Services. Unlike Lightning's BTC-only approach, Fiber supports multiple assets and leverages CKB's Turing-complete capability for flexible contracts.

    2. Currently on testnet (Q4 2024), Fiber initially supports four tokens (CKB, USDI, ccBTC, SEAL) and will launch on mainnet alongside USDI stablecoin and JoyID integration. The system will connect with RGB++-enabled wallets (eg, JoyID) and introduce stablecoins to Bitcoin's Lightning Network through atomic swaps.

  • UTXO Stack 

    1. UTXO Stack will be a joint liquidity pool across both the Fiber Network and the Lightning Network. The primary function of this hybrid network is to enable the use and seamless exchange of stablecoins across the underlying networks. UTXO Stack will support atomic swaps and optimize channel liquidity through its multi-token liquidity pool, automatically aggregating user deposits and dynamically allocating them across each network’s payment channels based on demand. 

    2. Users that deposit assets (BTC, CKB, or stablecoins) into this pool will earn yield from liquidity rental fees and a share of routing fees, while also receiving liquid staking derivatives for use in BTCFi protocols. This model will also lower entry barriers to using Bitcoin’s Lightning Network by covering the initial onchain fees to open channels, enabling users to repay upfront costs after receiving sufficient inbound payments.

  • Rock Web5

    1. Web5 = Web2 + Web3. It's rethinking internet evolution and aims to set clear trust boundaries in tech architecture for different components to function properly. Web5 offers a pragmatic, forward-thinking middle way. It doesn't discard existing systems, but combines Web2's usability with Web3's autonomy for a new technical paradigm.

    2. CKB will host a series of Rock Web5 hackathons to explore building the future of human-tech interaction in openness, efficiency, censorship-resistance, and inclusivity. The first Rock Web5 event was in Nantang, China. Followingly, Rock Web5 will hold events globally, tailored to local industries and cultures. CKB believes true decentralization empowers everyone to be rule-makers and Web5 participants.