Live on Solana Devnet

Trade Funding Rates on Solana

A Solana-native fixed-for-floating funding rate swap, built as a reference implementation. Drift PerpMarket reads verified on-chain, ~8k CU per settlement, audit-lite review across 10 threat classes.

Launch App View on GitHub View Markets

🧮Today's AI signal

purged walk-forward CV

Open trade

Total Markets

4 perps × 4 durations

—

Total Open Interest

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10×

Max Leverage

10% initial margin

Solana

Network

Devnet live

Live Markets

How It Works

Choose a Market

Select a perp (BTC, ETH, SOL, JTO) and an expiry duration (7D–180D).

Pick Your Side

Fixed Payer: pay fixed, receive variable — profit when rates rise. Fixed Receiver: receive fixed, pay variable — hedge your perp book.

Open Position

Deposit 10% of notional as collateral. Your position is live on-chain immediately.

Earn PnL Every Settlement

Every funding period, PnL updates: (variable − fixed) × notional. Close any time to realise gains.

Engineering Highlights

Every claim links to the underlying source, benchmark, or audit document.

~8,091 CU

Sub-200k CU settlement

Mean compute units across 32 live crank settlements on devnet — 0.017% of a block, 4% of the default per-tx budget.

CU benchmark

0 trusted oracles

On-chain rate verification

Drift PerpMarket account verified by program-owner check; last_funding_rate read from a fixed byte offset; clamped to ±50% per hour.

Threat T1

10 threats × file:line

Audit-lite security review

Self-audit covering oracle, settlement DoS, reentrancy, math overflow, MEV, and 5 more — every mitigation cross-referenced to source.

SECURITY.md

180-day funding history

12-month backtest

Binance perp funding for BTC/ETH/SOL — SOL averaging −5% APR (longs actually receive), with a −75% spike visible in the chart.

View chart

76.7% out-of-sample

ML rate advisor

Ridge + Logistic + LightGBM ensemble trained on 6 years of funding history. Purged walk-forward CV. 30-day horizon shown.

Accuracy chart

Manual + audit + CU bench

Honest test coverage

No green CI suite yet. Coverage matrix maps every instruction to its actual verification level today, plus a roadmap to restore unit tests.

TESTING.md

Scope & Prior Art

Fundex is a reference implementation, not a production trading venue. Pendle Boros (Arbitrum, early 2025) is the existing production funding rate swap in this category. Fundex makes different architectural choices from the Solana-native angle: on-chain Drift rate verification, per-market isolated vaults, and AMM-style dynamic LP fees.

Not audited. Not stress-tested with real LP capital. 12 months of backtest data show SOL-PERP funding averaging −5% APR (longs receive funding) and BTC at +5% — far below the threshold where most traders would pay to hedge. Submitted as a technical reference for the IRS primitive; product-market fit is an open question this project does not try to answer.

Try It on Devnet

Connect your wallet, mint devnet USDC from the faucet, and open a Fixed Payer or Fixed Receiver position in under a minute. No real funds at risk.

Launch App