Live on Ethereum Mainnet

Manage Your USDN. Mint · Redeem · Wrap — All in One Protocol

SmarDex USDN is the leading platform for the USDN synthetic dollar — mint USDN from ETH, earn 12.73% lifetime average APY through the Vault, redeem anytime. Delta-neutral. Fully backed. Available at smardex-usdn.com.

🚀 Launch App Explore Vault Docs →
12.73%
Lifetime Avg APY
$1.00
USDN Price
50/50
Protocol Balance
0.15 ETH
Security Deposit
// USDN Vault

Mint, Redeem & Wrap Your USDN

The SmarDex USDN Vault lets you deposit ETH, wstETH, or WETH to mint USDN synthetic dollars. Redeem anytime or wrap USDN for use across supported platforms.

MANAGE YOUR USDN

Connect Wallet
USDN Lifetime Avg. APY 12.73%
Mint USDN
Redeem USDN
Wrap and Unwrap USDN
Deposit amount Balance: Wallet not connected
◆ ETH ▾ 0.00
≈ $0
Withdraw amount
◉ USDN 0.00
≈ $0
Exchange Rate ⓘ1 ETH ≈ 1,931.79 USDN
Security deposit ⓘ0.15 ETH
Auto validate ⓘ$0.716852
You will burn ⓘ~ 0.00 SDEX (~0.0000 ETH)
Gas estimate ⓘ$0.11
// Protocol Features

Built for Performance. Designed for Real Yield.

Everything you need to manage USDN in one unified platform. SmarDex delivers innovative technology with the highest efficiency.

Delta-Neutral Mechanism

The SmarDex USDN protocol uses a mathematically precise delta-neutral strategy. Vault deposits are always balanced against long positions — ensuring USDN maintains its dollar peg regardless of market conditions.

50/50 Protocol Balance
🏛️

USDN Vault — 12.73% Avg APY

Deposit ETH, wstETH, or WETH into the SmarDex Vault and receive USDN. The vault generates yield through funding rate mechanisms — delivering a lifetime average APY of 12.73% to depositors.

12.73% Lifetime Avg APY
🔄

Mint & Redeem Instantly

Mint USDN by depositing assets into the vault or redeem USDN back to underlying assets at any time. The exchange rate is calculated in real-time based on vault balances and total USDN supply.

1 ETH ≈ 1,931.79 USDN
📦

Wrap & Unwrap USDN

Convert USDN to wUSDN (wrapped USDN) or wstUSDN for composability across protocols and platforms. Unwrap back to USDN at any time with zero fees. Full flexibility for managing your positions.

wUSDN · wstUSDN · USDnr
🔥

SDEX Buy-Back & Burn

8% of each funding rate and 5% of each USDN mint is used to purchase and burn SDEX tokens. As USDN adoption grows, the SDEX circulating supply decreases — creating upward pressure on SDEX value.

Deflationary SDEX
🛡️

Audited & Verified

SmarDex smart contracts have been independently audited and formally verified. The delta-neutral math is deterministic and provably correct. All vault balances are transparent and verifiable in real-time.

Formally Verified
// How It Works

Start Managing USDN in Minutes

Four simple steps to mint USDN and earn yield through the SmarDex Vault.

Connect Your Wallet

Visit smardex-usdn.com and connect your wallet. SmarDex supports MetaMask, WalletConnect, Coinbase Wallet, Ledger, and other popular options compatible with Ethereum.

Choose Your Asset

Select your deposit asset — ETH, wstETH, or WETH. Enter the amount you want to deposit. The protocol displays the exchange rate and estimated USDN you will receive in real-time.

Mint USDN

Review the exchange rate, security deposit (0.15 ETH), auto validate fee, SDEX burn amount, and gas estimate. Confirm the transaction to mint USDN tokens directly to your wallet.

Earn Yield & Manage

Your USDN earns yield through the vault's funding rate mechanism. Redeem USDN back to ETH anytime, or wrap to wUSDN for use across the protocol ecosystem. Track your position on smardex-usdn.com.

// SDEX Token

SDEX Powers the SmarDex Ecosystem

SDEX is the native governance and utility token of SmarDex. It is directly connected to the USDN protocol through an innovative buy-back and burn mechanism that reduces SDEX supply as USDN adoption grows. Every USDN mint and every funding rate payment contributes to SDEX deflation.

The SmarDex platform operates across multiple networks including Ethereum, Binance Smart Chain, Polygon, Arbitrum, and Base — with SDEX serving as the unifying token across the entire ecosystem.

Launch App

Funding Rate Burn — 8%

8% of each funding rate paid by the vault or long positions is used to purchase and burn SDEX tokens from the open market.

Mint Burn — 5%

During each USDN token mint, 5% of the minted USDN amount is taken in SDEX to be burned. Example: minting 1,000 USDN burns ~50 SDEX.

Volatility Vaults

SmarDex uses advanced Volatility Vaults with fictive reserves to transform impermanent loss into potential gains for providers.

Multi-Network Support

SDEX operates on Ethereum, BSC, Polygon, Arbitrum, and Base — ensuring accessibility and composability across the ecosystem.

// Long Positions

Go Long on ETH with Up to 25x Leverage

The USDN protocol balances vault deposits with long positions. Traders can open leveraged long positions on the underlying asset while also capturing yield from wstETH.

📈

Up to 25x Leverage

Open long positions with leverage from 1.1x to 25x. The protocol ensures balanced exposure between vault and long sides at all times.

🎯

Guaranteed Stop-Loss

SmarDex offers an innovative guaranteed stop-loss feature to protect against adverse market movements. Set your risk parameters before entering a position.

📊

Dip Accumulator

Automatically accumulate positions during market dips. The dip accumulator enables strategic entry points without constant monitoring.

💰

Dual Yield Advantage

When using wstETH as underlying, traders earn from both position appreciation and the inherent yield generated by the underlying asset — a dual advantage unique to SmarDex.

// Security First

Audited. Verified. Trusted.

SmarDex USDN is built with institutional-grade security. All smart contracts are independently audited and the delta-neutral mathematics are formally verified.

🔐

Non-Custodial

SmarDex never holds user funds. All operations execute through audited smart contracts. Your assets remain under your control at all times.

🔍

Formal Verification

The core USDN delta-neutral math has been formally verified. The logic is deterministic and mathematically provably correct.

🛡️

Independent Audits

Multiple independent security firms have audited the SmarDex and USDN smart contracts, ensuring the highest standard of reliability and safety.

📋

Transparent Operations

All vault balances, protocol ratios, funding rates, and SDEX burn statistics are visible in real-time on smardex-usdn.com. Full transparency at every level.

Security Audit I
Independent Firm · 2024
✓ PASSED
Security Audit II
Independent Firm · 2024
✓ PASSED
Formal Verification
Mathematical Proof · 2024
✓ VERIFIED
Ongoing Monitoring
Continuous · 2025
✓ ACTIVE
// FAQ

Everything You Need to Know

About SmarDex USDN, the Vault, SDEX token, and how to get started on smardex-usdn.com

SmarDex USDN is a protocol for managing the USDN synthetic dollar. Users can mint USDN by depositing assets like ETH, wstETH, or WETH into the vault, redeem USDN back to underlying assets, and wrap or unwrap USDN for use across supported platforms. The protocol operates with a delta-neutral mechanism ensuring USDN maintains its dollar peg. The SmarDex platform is available at smardex-usdn.com.
To mint USDN on SmarDex, connect your wallet on smardex-usdn.com, navigate to the Vault page, select the Mint USDN tab, choose your deposit asset (ETH, wstETH, or WETH), enter the amount, review the exchange rate and fees, and confirm the transaction. USDN tokens are minted proportionally to the value of your deposit. A security deposit of 0.15 ETH is required for certain operations.
The USDN Vault on SmarDex is where users deposit underlying assets (such as ETH) to mint USDN tokens. The vault holds all backing assets and determines the value of each USDN token. The vault has delivered a lifetime average APY of 12.73%. Actual yields vary depending on market conditions, funding rates, and protocol activity. Yield is generated through the delta-neutral mechanism where funding rates flow between vault depositors and long position holders.
To redeem USDN, go to the SmarDex Vault page at smardex-usdn.com, select the Redeem USDN tab, enter the amount of USDN you want to redeem, review the exchange rate showing how much ETH or other underlying asset you will receive, and confirm the transaction. The USDN tokens are burned and the corresponding underlying assets are returned to your wallet.
USDN is the base synthetic dollar token minted through the SmarDex Vault. wUSDN (wrapped USDN) is a wrapped version for cross-protocol usage. wstUSDN is a wrapped and staked variant. USDnr is another variant within the protocol ecosystem. You can wrap and unwrap between these variants using the Wrap and Unwrap tab on the SmarDex Vault page. All variants can be added to your wallet directly from the interface.
On SmarDex, you can mint USDN using ETH (Ethereum), wstETH (wrapped staked ETH), or WETH (wrapped ETH). The protocol automatically calculates the exchange rate based on the current value of the underlying asset and the total USDN supply. Currently, 1 ETH is approximately equal to 1,931.79 USDN.
SDEX is the native governance and utility token of SmarDex. It connects to USDN through a buy-back and burn mechanism: 8% of each funding rate is used to purchase and burn SDEX, and during each USDN mint, 5% of the minted amount is taken in SDEX to be burned. For example, minting 1,000 USDN burns approximately 50 SDEX. This reduces SDEX circulating supply and creates upward pressure on its value as USDN adoption grows.
For certain transactions on the SmarDex USDN protocol, users need to temporarily deposit 0.15 ETH as a security deposit. This deposit is held for a few seconds during the transaction and is returned after the operation completes. It ensures the integrity and security of the minting and redeeming process.
Auto Validate is a feature on SmarDex that automatically validates your USDN transactions. When enabled, the protocol handles transaction confirmation without requiring manual intervention. The auto validate fee is approximately $0.71 and covers the cost of automated transaction processing. You can enable or disable this feature from the settings panel on the Vault page.
The USDN exchange rate on SmarDex is determined by the total value of assets in the vault divided by the total USDN supply. For example, if the vault holds ETH worth $1,931.79 and there are 1,931.79 USDN in circulation, 1 ETH equals approximately 1,931.79 USDN. The rate updates in real-time based on the underlying asset price and vault balances. You can always see the current rate on smardex-usdn.com before confirming any transaction.
SmarDex USDN supports all major wallets including MetaMask, WalletConnect, Coinbase Wallet, Ledger hardware wallet, and other popular options. Simply click Connect Wallet on smardex-usdn.com to link your wallet and start managing your USDN. Mobile users can connect via WalletConnect QR code scanning.
SmarDex uses advanced Volatility Vaults with fictive reserves to transform what is traditionally a loss into potential gains. This innovative mechanism adjusts reserve calculations to ensure better outcomes. Combined with the USDN delta-neutral protocol, SmarDex offers a comprehensive solution for minimizing risk while maximizing returns on the platform.
Yes. The SmarDex protocol and USDN smart contracts have undergone rigorous security audits by independent firms. The protocol uses formally verified mathematical models for its delta-neutral mechanism. All operations are transparent and the vault balances can be verified in real-time. SmarDex operates on a non-custodial basis — your assets remain under your control at all times.
Gas estimates for USDN operations on SmarDex are typically around $0.11 for standard transactions. The actual gas cost depends on network conditions at the time of the transaction. SmarDex displays the estimated gas cost before you confirm any operation, allowing you to review all costs including the auto validate fee and security deposit requirements.
Yes. The USDN protocol allows users to open long positions on the underlying asset with leverage of up to 25x. The protocol balances vault deposits against long positions to maintain the delta-neutral mechanism. Traders using wstETH as underlying can benefit from both position appreciation and the inherent yield generated — a dual advantage. The protocol also offers guaranteed stop-loss and dip accumulator features.
From the SmarDex USDN Vault page, you can add the following tokens directly to your wallet with one click: WETH, wstETH, USDN, wUSDN, SDEX, wstUSDN, and USDnr. Each token has an add button that automatically registers the token contract in your connected wallet.
The USDN Protocol Balance shows the distribution between the Vault side and the Long side of the protocol. A healthy protocol maintains close to a 50/50 balance between these two sides. The current balance, funding rate, and all related metrics are displayed in real-time on the SmarDex platform, ensuring full transparency of the delta-neutral mechanism.
SmarDex operates across multiple networks including Ethereum, Binance Smart Chain, Polygon, Arbitrum, and Base. The USDN token and its wrapped variants can be used across supported platforms and protocols within the SmarDex ecosystem, providing flexibility and cost-effective access depending on your preferred network.
Full documentation for SmarDex USDN is available at docs.smardex.io. For platform access, visit smardex-usdn.com. For community support, join the SmarDex Discord or Telegram channels. Follow @SmarDex on Twitter for the latest announcements and updates about the USDN protocol and the broader SmarDex ecosystem.

Start Managing Your USDN Today

12.73% Avg APY $1.00 USDN Peg 50/50 Protocol Balance 5+ Networks
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◆ Ethereum ◆ Arbitrum ◆ Polygon ◆ BSC ◆ Base