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✊ For Bitcoiners

Your Bitcoin, Your Terms.

Access a Bitcoin-native Credit Market, without giving up full-custody. It’s built for everyday Bitcoiners who value sovereignty, transparency, and verifiable custody, not centralized black boxes.

Your BTC stays in a unique, programmable Taproot vault, secured by a Decentralized Custody Network using threshold Schnorr signatures. It’s on-chain, auditable, and non-custodial, always.

🚀 How It Works

1. Sign Up Securely

Get started via mobile app on Android or iOS. Sign up with just an email + OTP. We create a secure, self-custodial wallet with built-in backup and 2FA for enhanced protection.

2. Request a Credit Line

Specify your initial credit line amount with

  • Fixed interest rates (8–11% annually)
  • Variable interest rates coming soon (6.9% target)
  • A 12-month term with flexible repayment

You choose which market (variable or fixed) to borrow from; liquidity is drawn from the market accordingly.

  • No need to draw full amount upfront, you control usage

3. Send Bitcoin

  • A unique Taproot address is generated per credit line
  • You deposit BTC at 50% LTV (e.g., send 0.1 BTC for $3K USDC credit)
  • After 3 confirmations, your credit line becomes active

4. Draw & Repay Flexibly

  • Withdraw stablecoins (USDC, USDT) to any address
  • Spend, send, or off-ramp to a bank account
  • Repay any time to reclaim your BTC
  • Add more BTC to reduce LTV or unlock more credit

5. Stay Verifiably in Control

Your BTC is never moved without:

  • Your signature, and
  • the Distributed Custody Network signature based on programmable vault logic

If the system fails or goes offline, your vault includes a time-locked refund path—returning your BTC to your wallet after term expiration.

6. Liquidation, but Fair

Liquidation with a rules-based process that only liquidates in extreme cases when BTC collateral health declines past 90%.

  • Triggered only when on-chain oracles (like BTC/USD price) report sustained volatility
  • Price feeds are transparent and open—you can verify exactly what data is being used
  • Price feeds are double checked by DCN before liquidation begins

This means no surprise wipeouts, no discretionary calls—just fair, on-chain enforcement with double checks.

🔍 Built for Transparency

  • Taproot Vaults (dVaults): Powered by threshold Schnorr signatures, enabling shared control and programmable enforcement.
  • Verifiable Collab-Custody: You can inspect your vault and verify BTC remains unrehypothecated and on-chain.
  • Open System: All terms, credit logic, and signer network info are transparent at surge.build
  • Transparent Oracles: Anyone can view the price feeds that govern loan health and liquidation triggers.

💡 Why the credit market

Unlike traditional loans, Surge’s credit market offers flexible credit:

  • Borrow only what you need, when you need it
  • Repay and reuse, no need to reapply
  • Maintain control over your BTC with on-chain proof at every step

Surge is for Bitcoiners who believe in holding their keys and want access to liquidity without selling their future.