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YBTC.B: Cross-chain Wrapped Native BTC Asset

Overview​

YBTC.B is a wrapped version of Bitlayer's Native BTC, designed to function as a universal cross-chain liquidity standard across both EVM and non-EVM chains. It enables users to deploy native Bitcoin liquidity seamlessly within DeFi ecosystems on multiple networks.

Purpose​

YBTC.B is engineered with the following core objectives:

1. Make BTC Programmable and Usable​

Unlock the value of native BTC by making it accessible and composable across DeFi protocols spanning multiple chains.

2. Create a Unified BTC Liquidity Standard​

Whether on Sui, Avalanche, Plume, Starknet or any other chains, YBTC.B represents a 1:1 Bitcoin-pegged asset—backed and redeemable on demand.

3. Serve as a Cross-chain DeFi Hub Asset​

Acts as the liquidity medium connecting native Bitcoin with yield-generating strategies (Vaults), lending protocols, AMMs, and staking infrastructures across chains.

Key Features​

  • 1:1 Peg to Native BTC
    Each YBTC.B token is fully backed by a corresponding amount of native BTC, either bridged or locked on-chain, and is redeemable at any time.

  • Multi-chain Yield Bearing
    YBTC.B can be deposited into DeFi and CeDeFi Vaults across multiple chains to earn BTC-denominated yield. Strategies include LP farming, lending, and fixed-income RWAs, with automated reward compounding and flexible redemption mechanisms.

  • Cross-chain Composability
    YBTC.B can move freely between Bitlayer, EVM-compatible chains (e.g., Avalanche, Plume), and non-EVM chains (e.g., Sui, Starknet), ensuring fluid capital mobility.

  • Unified Asset Format
    Regardless of the destination chain, YBTC.B maintains a consistent token logic and peg structure, simplifying wallet and protocol integration.

Token Origin & Minting​

Underlying Asset​

YBTC.B is derived from Bitlayer Native BTC, which itself is backed 1:1 by off-chain BTC reserves.

Refer to Proof of Reserve for the proof of Bitlayer native BTC.

Minting Mechanism​

YBTC.B is minted through verified smart contracts when users bridge BTC into Bitlayer and initiate wrapping via the official bridge infrastructure.

YBTC.B is backed 1:1 by Bitlayer native BTC. Users can query information directly from the YBTC.B contract on Bitlayer.

More detailed information about YBTC.B​

  • YBTC.B contract has been upgraded to V2 version, which implements ERC4626 standard.
  • Users can deposit Bitlayer native BTC via deposit() public payable function, or deposit Bitlayer WBTC (a wrapped token of Bitlayer native BTC) via ERC4626 functions deposit(uint256 assets, address receiver) public 0r mint(uint256 shares, address receiver) public.
  • Users can query totalAssets() for the amount of underlying asset, and totalSupply for the total supply of YBTC.B.
  • Bitlayer network is EVM-compatible, which requires that the Bitlayer native BTC has a decimals of 18, but the decimals of YBTC.B is 8, their value equivalence is 1 YBTC.B = 1 BTC, meaning that on-chain, 1 units of YBTC.B should equal 1e10 wei of BTC in terms of the smallest precision units. There's a getConvertRatio function in the YBTC.B contract, which returns a fixed value of 1e10. Users should note the difference in decimals between the Bitlayer native BTC and YBTC.B tokens.
  • The YBTC.B contract restricts the deposited BTC amount to be an integer multiple of 1e10, ensuring that users do not lose any BTC due to precision truncation.
  • YBTC.B is originally minted on Bitlayer network, all deployed version on other chains is a bridged-version, mainly bridged via Chainlink-CCIP protocol.

How to Acquire YBTC.B​

  • Bridge from Native BTC
    Use Bitlayer’s official bridge to transfer BTC into Bitlayer Layer 2 and mint YBTC.B directly.

  • Buy on DEXs
    YBTC.B is available on AMMs and liquidity pools across supported chains.

  • Borrow via Lending Platforms
    Supported as a collateral asset or borrowable token via partner DeFi protocols.

Contract Addresses​

Chain NameContact Address
Bitlayer0x2cd3cdb3bd68eea0d3be81da707bc0c8743d7335
Sui0xa03ab7eee2c8e97111977b77374eaf6324ba617e7027382228350db08469189e::ybtc::YBTC
Avalanche0x2cd3cdb3bd68eea0d3be81da707bc0c8743d7335
Plume0x2cd3cdb3bd68eea0d3be81da707bc0c8743d7335
BSC0x2cd3cdb3bd68eea0d3be81da707bc0c8743d7335
Ethereum0x2cd3cdb3bd68eea0d3be81da707bc0c8743d7335
Plasma0x2cd3cdb3bd68eea0d3be81da707bc0c8743d7335
Ink0x2cd3cdb3bd68eea0d3be81da707bc0c8743d7335
Solana3VcKofugG1SPJmjuiEZCJL5mk1JkyqGZ19ByeMWXVWfK
Starknet0x02cab84694e1be6af2ce65b1ae28a76009e8ec99ec4bc17047386abf20cbb688

YBTC.B represents a foundational component in enabling programmable Bitcoin liquidity across DeFi, bridging native BTC with scalable multi-chain applications.