fxUSD/BTC Market
Status: ✅ Deployed - Production v1 deployment on Ethereum mainnet
The fxUSD/BTC market allows users to mint pegged tokens (haBTC) and leveraged tokens (hsFXUSD-BTC) using fxUSD (via fxSAVE) as collateral.
Market overview
| Token | Role |
|---|---|
| haBTC | Pegged token — BTC exposure (shared with stETH/BTC) |
| hsFXUSD-BTC | Leveraged token — variable BTC exposure |
Collateral: fxUSD via the fxSAVE vault.
Contract addresses (Mainnet)
Proxy keys and CREATE3 salt strings: Generic → Mainnet proxy table. State file: deployments/mainnet/harbor_v1.state.json.
- minter (
BTC::fxUSD::minter):0x33e32ff4d0677862fa31582CC654a25b9b1e4888 - peggedToken (
BTC::pegged):0x25bA4A826E1A1346dcA2Ab530831dbFF9C08bEA7(haBTC) - leveragedToken (
BTC::fxUSD::leveraged):0x9567c243F647f9Ac37efb7Fc26BD9551Dce0BE1B(hsFXUSD-BTC) - reservePool (
BTC::fxUSD::reservePool):0xfDE46D4425138aA01319bB8587Cb935a0393DfE3 - stabilityPoolManager: Not deployed on this market (
ETH::fxUSD::stabilityPoolManagershared):0xE39165aDE355988EFb24dA4f2403971101134CAB - genesis (
BTC::fxUSD::genesis):0x42cc9a19b358a2A918f891D8a6199d8b05F0BC1C - priceOracle:
0x8F76a260c5D21586aFfF18f880FFC808D0524A73(fxUSD/BTC aggregator) - feeReceiver (
BTC::fxUSD::minterFeeReceiver):0x70DdA12032335656b63435840Cd55ff7A19dDAb7(TokenDistributor) - stabilityPoolCollateral (
BTC::fxUSD::stabilityPoolCollateral):0x86561cdB34ebe8B9abAbb0DD7bEA299fA8532a49 - stabilityPoolLeveraged (
BTC::fxUSD::stabilityPoolLeveraged):0x9e56F1E1E80EBf165A1dAa99F9787B41cD5bFE40 - collateralToken:
0x085780639CC2cACd35E474e71f4d000e2405d8f6(fxUSD) - wrappedCollateralToken:
0x7743e50F534a7f9F1791DdE7dCD89F7783Eefc39(fxSAVE)
Token details
Pegged token (haBTC)
Shared with stETH/BTC. Address: 0x25bA4A826E1A1346dcA2Ab530831dbFF9C08bEA7
Leveraged token (hsFXUSD-BTC)
Address: 0x9567c243F647f9Ac37efb7Fc26BD9551Dce0BE1B — variable BTC exposure with fxSAVE yield.
Collateral
- fxUSD:
0x085780639CC2cACd35E474e71f4d000e2405d8f6 - fxSAVE:
0x7743e50F534a7f9F1791DdE7dCD89F7783Eefc39
Stability pools
Collateral stability pool
- Proxy key:
BTC::fxUSD::stabilityPoolCollateral - Address:
0x86561cdB34ebe8B9abAbb0DD7bEA299fA8532a49 - Rebalance Token: fxUSD (collateral)
- Purpose: Liquidates positions using collateral
Leveraged stability pool (Sail pool)
- Proxy key:
BTC::fxUSD::stabilityPoolLeveraged - Address:
0x9e56F1E1E80EBf165A1dAa99F9787B41cD5bFE40 - Rebalance Token: hsFXUSD-BTC (leveraged token)
- Purpose: Liquidates positions using leveraged tokens
Price oracle
The fxUSD/BTC price oracle (0x8F76a260c5D21586aFfF18f880FFC808D0524A73) provides:
- Rate Provider: fxSAVE vault (for fxUSD exchange rate)
- Price Feed: BTC/USD Chainlink feed (inverted to get fxUSD/BTC)
- Purpose: Determines collateral value and minting/redemption rates
See Price Oracle Contracts for detailed information.
Market parameters
| Collateral | fxUSD (via fxSAVE vault) |
| Leverage | Variable, collateral-ratio bands |
| Yield | fxSAVE vault |
| Rebalancing | Stability pools |
| Deployment | Mainnet, December 2025 (startBlock: 24049375) |
Genesis (Maiden Voyage)
| Start | December 19, 2025 |
| End | January 4, 2026 |
| Genesis zap | 0xF012a1BA66a411404FEae0a2AeD68dEB18D7de32 (GenesisUSDCZap_v2) |