Features & Architecture

Technical overview of the Havn Finance non-custodial gateway and routing engine.

Technical Architecture

The Havn Finance platform is architected to seamlessly bridge decentralized liquidity pools with fiat settlement networks globally. By minimizing intermediary steps, we achieve sub-second execution for stablecoins and major L1 assets.

The Routing Engine

Our custom smart contract routing engine, the Havn Gateway, is deployed across EVM-compatible networks and Solana.

Transaction Lifecycle

1. Quote Generation

   Upon receiving a top-up request, our frontend queries aggregated off-chain oracle prices (Chainlink, Pyth) against real-time DEX liquidity (Jupiter, Uniswap) to secure a fixed conversion rate valid for 30 seconds.

2. Asset Locking

   The user signs a transaction sending the exact crypto amount to a single-use deterministic smart contract vault.

3. JIT Conversion

   Sub-second Just-In-Time (JIT) execution converts the volatile asset (if applicable) against stablecoin deep liquidity.

4. Fiat Ledger Settlement

   The stablecoin is settled via institutional API with our banking partner, immediately reflecting the fiat balance on the virtual card ledger via webhooks.

Deep Liquidity Integration

We utilize advanced Smart Order Routing (SOR) algorithms to minimize slippage, particularly for high-tier card funding operations.

Cross-Chain Capabilities

Network	Principal Aggregator	Average Finality
Solana	Jupiter (JUP)	< 400ms
Ethereum	Uniswap / 1inch	~ 12s
Polygon (PoS)	QuickSwap / 1inch	~ 2s
Base	Aerodrome	~ 2s

Security & Compliance Model

Security is paramount in financial bridging infrastructure. Havn Finance inherently limits total value locked (TVL) risks by operating purely as a gateway rather than an AMM or lending protocol.

Smart Contract Protections

• No Proxy Upgradability on Vaults: Funding vaults are immutable, ensuring logic cannot be maliciously altered mid-transaction.
• Slippage Tolerance Checks: All on-chain conversions fail/revert if the execution price deviates outside the strictly defined SLA threshold (0.5% max).
• Timelocked Funds: If fiat settlement via the banking partner API times out or fails, smart contracts have a built-in 24-hour timelock, after which funds become directly withdrawable by the originating wallet.

Non-Custodial Assurances

Because we do not use multi-sig wallets for holding user deposits, there is zero platform counterparty risk regarding the crypto assets. Your keys, your crypto. Funds exist either strictly under your self-custody or are instantly materialized as fiat purchasing power on the authorized banking ledger.

“By abstracting the complexity of cross-chain bridging and fiat off-ramps, Havn Finance delivers the UX of a traditional fintech app with the sovereign properties of Web3.”