The new version of USDD is a fully decentralized stablecoin pegged to the US dollar, backed by crypto collateral. Unlike traditional stablecoins, it operates without a central authority, ensuring that its value remains stable while being governed by the community. USDD provides users with a secure and transparent digital asset, designed to maintain its 1:1 peg to the US dollar through a system of over-collateralization.

USDD is tamper-proof and cannot be frozen, giving users full control over their assets. With its decentralized nature, USDD avoids the risks of centralization and provides a trustless solution for transactions within the decentralized finance (DeFi) ecosystem. It aims to bridge the gap between traditional finance and the growing world of DeFi, offering a stable and reliable currency for users to transact and invest.

Note: Throughout this document, all references to "USDD" specifically refer to the new version of USDD.

USDDOLD is an over-collateralized decentralized stablecoin that is issued by TRON DAO Reserve, who is also the custodian. USDDOLD is minted by the whitelisted institutions of the TRON DAO Reserve (TDR) through burning TRX. Its value is backed by the over-collateralization of highly liquid crypto assets under the TDR, including BTC, USDT, USDC, and TRX. The circulation and use of USDDOLD are free from the intervention of any centralized parties. Similar to BTC and ETH, USDDOLD grants its holders full ownership, meaning that no organization or individual has access to freeze users’ USDDOLD.

USDD stands out as a next-generation stablecoin built on principles of decentralization, transparency, and user empowerment. Below are the core features that define its functionality and value:

1. Decentralized Governance USDD is governed by a transparent, community-driven process through decentralized proposals and on-chain voting mechanisms.

2. Transparency and Auditability All collateral and transactions supporting USDD are fully auditable and recorded on the blockchain. This open-source approach guarantees users can verify the system's integrity in real-time, fostering trust and security.

3. Enhanced Security With over-collateralized reserves, USDD ensures asset protection against market fluctuations. Decentralized governance mechanisms further safeguard the stability and security of the ecosystem.

4. Seamless DeFi Integration USDD integrates effortlessly into the broader DeFi ecosystem, enabling use cases like lending, borrowing, staking, and trading. This interoperability makes it a versatile tool for both individual users and institutions.

5. Freeze-Free Transactions USDD guarantees that no centralized authority can freeze user funds, providing users with full control of their assets at all times.

6. Multichain A fully decentralized stablecoin supporting TRON, Ethereum, BNB Chain.

These core features make USDD a robust and adaptable stablecoin, designed to empower its users while maintaining the highest standards of stability, security, and decentralization.

Purpose

• The DSProxy contract allows users to execute code on their behalf using a persistent proxy address.

• It simplifies complex multi-step operations by enabling atomic execution within the context of the proxy’s identity.

• Ownership of the proxy is flexible and can be transferred, supporting dynamic models like multisignature wallets.

Key Methods

• execute(bytes memory _code, bytes memory _data)

  • If _code corresponds to a cached contract, it is executed directly; otherwise, the contract is deployed and cached before execution.

  • _data specifies the calldata to be sent to the contract.

  • Emits an Execute event upon successful execution.

Trigger Mechanism

• The protocol continuously monitors CDPs to assess their collateralization ratio.

• If the ratio falls below the minimum collateralization threshold, the liquidation process is initiated automatically.

Auction Process

• Liquidated collateral is put up for auction to a valid bidder.

Purpose

It ensures that new price values propagated from the Oracles are not taken up by the system until a specified delay has passed.

Key Responsibilities

When a Vault's Collateralization Ratio falls below the Min. Collateral Ratio, it becomes eligible for liquidation. This process plays a critical role in maintaining the stability and efficiency of the USDD ecosystem. By participating in liquidations, users can earn rewards while contributing to the system's health.

Steps to Participate in Liquidation

1. Navigate to the Liquidation Page Visit the Liquidation Page to view Vaults eligible for liquidation.

Liquidation is a critical process in the USDD system that ensures the stability and solvency of the protocol. When a user's collateralized debt position (CDP) becomes undercollateralized (i.e., the value of collateral falls below the required threshold), the liquidation mechanism is triggered to maintain the integrity of the system.

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Purpose

Ensures the protocol receives real-time, reliable price data for all collateral types. SPOT determines whether Vaults meet collateralization requirements.

Key Responsibilities

• Retrieves and updates collateral prices.

• Enforces collateralization thresholds for system stability.

Key Methods

• poke(ilk) Updates the system with the latest price for a specific collateral type.

  • Example Use: Updating the TRX price when markets fluctuate.

• file(what, ilk, data) Configures parameters such as the liquidation ratio (mat).

1. Navigate to the Vault page

Go to the Vault section and locate the active Vault you wish to close.

1. Connect Your Wallet

Connect your wallet to the platform.

Ensure your wallet has enough TRX to cover the gas fees required for repayment and collateral withdrawal.

Purpose

Maintains USDD’s price peg by facilitating 1:1 swaps with other stablecoins (e.g., USDT).

Key Responsibilities

Purpose

Enables seamless migration of USDDOLD to the new USDD version. This tool ensures users can upgrade at their convenience without deadlines.

Key Responsibilities

If you believe in the long-term value of the collateral you've deposited and don't want to sell it, but still need liquidity for other purposes in life, USDD offers a secure and decentralized solution. By minting USDD using your collateral, you can maintain your investment while accessing the funds you need.

Feature Overview

Vault Management

The Vault system allows you to manage your collateral and mint USDD securely and efficiently.

• Open a Vault: Select your preferred collateral type, specify the amount of collateral you wish to deposit, and enter the amount of USDD you want to mint. Confirm the transaction with a wallet signature.

• Payback: Repay the minted USDD along with the accrued stability fees to clear your debt and free up your collateral.

• Withdraw: After repaying your debt or ensuring your Vault has sufficient collateral, you can withdraw the collateral you previously deposited.

Peg Stability Module (PSM)

The USDD PSM enables seamless, zero-fee conversions between USDD and other stablecoins like USDT. This feature plays a critical role in maintaining USDD's 1:1 peg to the US dollar, ensuring stability in all market conditions.

• Convert USDD to USDT or vice versa instantly without slippage.

• A user-friendly way to maintain liquidity and hedge against market volatility.

Migrate

Easily upgrade from the USDD(OLD) system to the latest version with enhanced features and stability. Migration ensures you can access all the benefits of the new USDD protocol while preserving your assets.

Portfolio Management

The portfolio dashboard provides a comprehensive view of your Vault activity and collateral health:

• View all active Vaults associated with your wallet.

• Check detailed transaction histories, including minting, payback, and withdrawals.

• Monitor your collateral ratio to avoid liquidation risks.

Liquidation

Protect the system from under-collateralized positions. If a Vault's collateral ratio falls below the liquidation threshold, the collateral will be liquidated to recover the debt and maintain system stability.

• How It Works: Liquidated Vaults sell collateral to repay debt and fees.

• Stay informed about liquidation risks by checking your Vault regularly.

• Always maintain a healthy collateral ratio to avoid liquidation.

Auction

The auction system helps redistribute liquidated collateral fairly and efficiently:

• Bid on liquidated collateral to acquire assets at competitive prices.

• View auction details such as Auction ID, debt amount, available collateral, and current bid price.

• Participate in auctions to support system stability while potentially earning a profit.

Welcome to usdd.io, a website-hosted user interface (the “Interface” or “App”) provided by the USDD Team (“we”, “our”, or “us”). The Interface provides access to decentralized protocols on the blockchain that support the USDD ecosystem and enable users to interact with various functionalities, including deposit, mint, payback, withdraw and manage digital assets. This Privacy Policy explains how we collect, use, and protect your information when you access and use the Interface. By using the Interface, you agree to the terms of this Privacy Policy. If you do not agree, you are not authorized to access or use the Interface.

1. Preface

This Privacy Policy provides our privacy policy regarding the nature, purpose, use, and sharing of personal data or other information collected from the users of usdd.io and other related websites (the "Site"). We are committed to protecting and respecting your privacy. Please read this carefully as this Privacy Policy is legally binding when you use the Site.

As used in this Privacy Policy, "we", "us" or "our" refers to the USDD Team, which actively manages the Site and supports the ecosystem. You can reach us with any request relating to this Privacy Policy via contact details provided below.

2. Information We Collect

We may collect the following types of information:

• Personal Information: Information that can identify you, such as wallet address, when you voluntarily provide it.

• Usage Data: Information about how you interact with the Interface, including IP addresses, device information, and browsing activity.

• Blockchain Data: Public blockchain data associated with your wallet address.

We do not collect sensitive personal information, such as government-issued IDs or financial account details.

3. Use of Cookies and Similar Technologies

The Interface uses cookies and similar technologies to enhance your experience. Cookies are small text files placed on your device that help us understand user behavior, improve our Interface, and analyze trends. Information collected from cookies may include:

• Device information

• Page views

• Button clicks

• Errors encountered

We work with third-party service providers who may also use cookies or similar technologies to assist us in analyzing user behavior. You can manage your cookie preferences through your browser settings. Disabling cookies may limit certain features of the Interface.

4. How We Use Your Information

We use the information we collect for the following purposes:

• To provide and improve the Interface and its functionalities.

• To communicate with you, including responding to your inquiries.

• To comply with legal and regulatory requirements.

• To prevent fraudulent or malicious activity and ensure the security of the Interface.

5. Sharing of Information

We do not sell, rent, or share your personal information with third parties for their marketing purposes. However, we may share your information:

• With service providers that assist us in operating the Interface.

• If required by law or to comply with legal obligations.

• To protect our rights, property, and users.

• With your explicit consent.

6. Your Rights

Depending on your jurisdiction, you may have the right to:

• Access, correct, or delete your personal information.

• Restrict or object to the processing of your personal information.

• Withdraw consent where processing is based on consent.

• Lodge a complaint with a data protection authority.

7. International Transfers

We may transfer your personal information to third parties in different jurisdictions to process data or provide services. These third parties are required to protect your information in accordance with applicable data protection laws.

8. Data Security

We implement reasonable security measures to protect your information from unauthorized access, use, or disclosure. However, we cannot guarantee absolute security due to the inherent risks of transmitting data over the internet and the decentralized nature of blockchain.

9. Third-Party Links and Social Media

The Interface may include links to third-party websites or social media plugins (e.g., GitHub, YouTube, Twitter). These third-party services operate under their own privacy policies, and we are not responsible for their practices. Please review their privacy policies before engaging with them.

10. Duration of Data Processing

We will process your personal data only for the period necessary to achieve the purpose of the processing, or as required by applicable laws. After this period, your personal data will be deleted.

11. Changes to This Privacy Policy

We reserve the right to modify this Privacy Policy at any time. If we make changes, we will update the "Last Modified" date at the beginning of the policy. Your continued use of the Interface after modifications constitutes acceptance of the revised terms.

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The governance framework of the USDD ecosystem is designed to be community-driven and decentralized, ensuring inclusivity, transparency, and adaptability. Governance empowers stakeholders to make critical decisions regarding the protocol's future, stability, and growth.

If you’ve already opened a Vault, you can manage it through various actions to optimize its performance and mitigate risks. Below is a detailed guide for managing your Vault:

1. Add Collateral

Adding more collateral to an existing Vault increases the Collateralization Ratio, reducing the risk of liquidation.

• Enter the amount of collateral you wish to deposit.

• The updated collateralization ratio and other key metrics will be displayed on the right side of the page, providing a clear view of how this action affects your Vault's stability.

2. Mint More USDD

If you need additional liquidity, you can mint more USDD from your Vault.

• Enter the desired amount of USDD to mint, staying within the allowable range to avoid errors.

• Caution: Minting more USDD decreases the Collateralization Ratio, increasing the risk of liquidation. If the ratio falls below the Min. Collateral Ratio, your Vault may be liquidated to cover the debt.

3. PayBack USDD

If you have surplus USDD, you can repay part or all of your Vault debt.

• Reducing your debt increases the Collateralization Ratio, significantly lowering the risk of liquidation.

• This is a useful option if you aim to stabilize your Vault or reduce exposure to potential market volatility.

4. Withdraw Collateral

If your Vault is well-collateralized and not at risk of liquidation, you may withdraw a portion of your collateral.

• Enter the amount you wish to withdraw.

• Caution: Withdrawing collateral reduces the Collateralization Ratio, potentially bringing your Vault closer to the Min. Collateral Ratio. Monitor the updated metrics carefully before proceeding.

Risk Management Tips:

• Always maintain a healthy Collateralization Ratio (CR) above the Min. Collateral Ratio (MCR) to avoid liquidation. Your position falls into one of four categories:

  • Conservative: Your CR is well above the MCR, providing a strong safety buffer.

  • Moderate: Your CR is above the MCR, but the buffer is smaller—monitor your position closely.

These management tools allow you to maintain flexibility while keeping your Vault secure and optimized for your financial goals.

As the transition to USDD 2.0 progresses, various ecosystem partners have successfully migrated from USDD 1.0. Below is a categorized list of platforms and projects that now support USDD 2.0:

🔹 Supported Chains

• TRON

• Ethereum

• BNB Chain

• BTTC

🔹 Supported Exchanges & DeFi Platforms

🔹 Supported Wallets

• TronLink

• TokenPocket

• imToken

• Gate Web3 Wallet

This list will be continuously updated as more partners complete their migration. Please ensure that the platform or service you are using fully supports USDD 2.0.

Security is our top priority. USDD's smart contracts have undergone rigorous security audits by leading blockchain security firms to ensure the safety and integrity of the protocol. These audits assess potential vulnerabilities and verify the robustness of our system.

USDD v2

• Date: January 24, 2025

• Auditor: ChainSecurity

• Network: Tron

PSM

• Date: January 24, 2025

• Auditor: ChainSecurity

• Network: Tron

Exchange

• Date: January 24, 2025

• Auditor: ChainSecurity

• Network: Tron

USDD - Ethereum

• Date: September 2, 2025

• Auditor: CertiK

• Network: Ethereum

USDD - Ethereum and BSC

• Date: October 24, 2025

• Auditor: ChainSecurity

• Network: Ethereum and BSC

USDD continues to undergo regular security assessments to maintain the highest level of protection for users and assets.

sUSDD is the yield-bearing version of USDD. Its core mechanism is based on the ERC-4626 tokenized vault standard. When users deposit and stake USDD into the USDD Earn protocol, sUSDD is minted and distributed according to the current exchange rate.

Core Mechanism & Value Accumulation

The value growth of sUSDD stems from its unique redemption mechanism, which reflects the dynamic relationship between total USDD staked and accumulated rewards. The minting and valuation formulas are as follows:

Dynamic value growth

• At any moment, the sUSDD-to-USDD value serves as the key metric for tracking cumulative yield performance.

• As USDD continues to accrue returns via the Smart Allocator strategy, the value of sUSDD steadily increases over time.

• This ensures that holders of sUSDD directly benefit from the yield strategy, reflected in the token’s appreciating value.

Liquidity & Redeemability

• Each sUSDD is fully redeemable for USDD at any time.

• USDD deposited is never locked, and withdrawals from sUSDD incur no liquidity restrictions.

ERC-4626 Standard

sUSDD is an ERC-4626-compliant tokenized vault designed for EVM-compatible blockchains. This standard enhances DeFi composability and interoperability.

Key Advantages of ERC-4626:

• Standardized API – Provides a unified interface for managing yield-bearing assets efficiently.

• Transparent & Efficient Yield Distribution – Ensures fair and transparent allocation of returns to staked USDD holders.

• Simplified Integration – Facilitates future integration of sUSDD with broader DeFi protocols, improving UX and security.

sUSDD Yield Mechanism Operation

sUSDD leverages an ERC-4626 vault to distribute yields. This standard ensures transparent and efficient yield allocation while providing a solid foundation for integration into broader DeFi applications.

Purpose

The core accounting contract of the protocol, VAT tracks system-wide balances, including user Vaults, collateral types, and debt. It ensures that all collateral and debt are properly accounted for and enforces system solvency.

Key Responsibilities

• Tracks collateral and debt balances for all users and collateral types.

• Ensures Vault operations (e.g., minting and repaying USDD) adhere to protocol parameters.

• Integrates with other contracts to trigger auctions or manage liquidations.

Key Methods

• slip(ilk, usr, wad) Adjusts the balance of a specific collateral type (ilk) for a user (usr).

  • Example Use: Adding or removing collateral from a user's Vault.

• frob(ilk, u, v, w, dink, dart) Adjusts collateral (dink

The USDD system architecture is designed to ensure stability, security, transparency, and scalability. It operates as a decentralized platform leveraging robust collateral mechanisms, efficient liquidation processes, and community-driven governance to maintain the stability of USDD and its integration within the DeFi ecosystem.

Collateral Management

USDD employs an over-collateralization model to safeguard its stability and reduce systemic risk. Users can lock eligible assets, such as TRX, and USDT, to mint USDD. Key aspects of collateral management include:

• Over-Collateralization: Users are required to maintain a collateral ratio above the minimum threshold, varying by asset based on its volatility.

1. Navigate to the Vault page

2. Connect Your TronLink Wallet

   1. Begin by linking your TronLink wallet to the platform. This wallet will serve as your interface for managing collateral and minting USDD.

The USDD protocol is designed with a robust security framework to ensure the safety and integrity of user assets and the overall ecosystem. Comprehensive risk assessment processes are employed to identify, mitigate, and monitor potential vulnerabilities.

• Over-Collateralization

  • Ensures all minted USDD is backed by digital assets exceeding the value of the stablecoin.

  • Reduces the risk of insolvency during volatile market conditions.

When a Vault is liquidated, its collateral is moved into an auction process. Users can bid on the collateral at auction prices, potentially securing profits. The auction uses a Dutch auction model, where the price gradually decreases over time until a buyer places a bid or the auction ends.

Steps to Participate in an Auction

1. Navigate to the Auction Page Visit the Auction Page to explore ongoing auctions.

Purpose

Calculates and accrues stability fees on minted USDD. These fees ensure protocol sustainability and discourage excessive borrowing.

Key Responsibilities

Purpose

It provides the protocol’s trusted reference price.

Key Responsibilities

1. Collateral Deposit and Minting A user deposits collateral worth $1,500 and mints $1,000 USDD, maintaining a collateralization ratio of 150%.

2. Market Downturn and Collateralization Ratio Drop Due to a market downturn, the collateral value drops to $1,200, reducing the collateralization ratio to 120%, which is below the liquidation threshold of 130%.

3. Liquidation Triggered The system automatically flags the Vault for liquidation to protect the protocol from losses.

4. Collateral Auction Begins

   1. The liquidation engine starts an auction for the $1,200 worth of collateral.

   2. The auction follows a Dutch auction mechanism, where the price starts at a high initial value and gradually decreases over time until a bidder accepts the price or the auction ends.

5. Keeper Participation

   1. Keepers, who are incentivized participants, place bids during the auction.

   2. A Keeper bids an amount of USDD equal to the debt ($1,000) plus the liquidation penalty (10%), totaling $1,100.

   3. The Keeper wins the auction by accepting the current auction price for the collateral.

6. Collateral Settlement

   1. The protocol retains $1,100 worth of USDD to cover the debt and liquidation penalty.

   2. Any remaining collateral value (after deducting the amount sold during the auction) is refunded to the user.

7. Auction Outcome

   1. The Keeper receives the collateral at the auction price. For example, if the auction price is $0.95 per unit of collateral, the Keeper receives collateral valued at $1,157.89 ($1,100 ÷ $0.95).

   2. The user retains any excess collateral that wasn't required to cover the debt and penalty.

This process ensures the protocol remains solvent while providing opportunities for Keepers to acquire collateral at competitive prices and protecting users by refunding surplus collateral.

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• Protects the Protocol Against Bad Debt By swiftly addressing under-collateralized positions, the liquidation process safeguards the system from accumulating unmanageable debt, ensuring its financial health and sustainability.

• Maintains Trust in the System Adhering to strict collateralization requirements reinforces user confidence in the stability and reliability of the USDD ecosystem.

• Stabilizes the USDD Peg Liquidation and auction processes help maintain USDD’s 1:1 peg to the dollar by ensuring that collateral backing the stablecoin remains sufficient, even during market downturns.

• Enables Efficient Collateral Redistribution Auctions redistribute liquidated collateral efficiently to market participants (Keepers) who value and purchase it, allowing for rapid system stabilization and collateral recirculation.

• Incentivizes Market Participation Keepers are rewarded for participating in liquidations and auctions, creating an active ecosystem that enhances the protocol's responsiveness and liquidity.

• Strengthens System Resilience The liquidation and auction mechanism enhances the protocol's ability to withstand extreme market volatility, ensuring decentralized, secure, and robust operations.

This comprehensive process not only preserves the protocol’s integrity but also creates a self-sustaining loop of stability, transparency, and trust, which are critical to USDD’s long-term success in the DeFi ecosystem.

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An oracle module is deployed for each collateral type, feeding it the price data for a corresponding collateral type to the Vat. Every oracle module contains three main contracts: Median, OSM, Spot.

Procedure

1. Median computes a price from a list of supported price feeds.

2. OSM updates the current price and the next price according to the price from Median.

3. Spot reads the current price from OSM and updates ilk.spot in vat.

USDD use Chainlink and WinkLink Data Feeds as its primary Oracles.

The USDD protocol is constantly evolving, and now we are taking a big step towards sustainable yield. We’re proud to introduce Smart Allocator, USDD’s new fully on-chain, transparent, and risk-controlled investment strategy that brings self-sustaining yield to the USDD ecosystem.

Built to be sustainable, transparent and rewarding for users, Smart Allocator allows the protocol to generate yield independently, and its final aim is to remove reliance on external subsidies and pave the way toward long-term economic viability.

Why Smart Allocator?

Until now, USDD’s yield has been funded by TRON DAO. While effective for growth, this approach must mature if we want to consider USDD’s long-term development. Incentives backed by centralized subsidies are not sustainable forever, and protocols that depend on them remain vulnerable.

Smart Allocator changes this by enabling the USDD protocol itself to invest idle capital, earn yield, and redistribute those earnings to the community. All this is achieved without affecting peg stability, allowing users a low-risk way to earn yield without compromising stability and security.

With Smart Allocator, USDD is more than just a stablecoin. It becomes a self-sustaining financial system that works in the long term.

How Smart Allocator Works

To fully understand how Smart Allocator enables sustainable, protocol-driven yield, let’s walk through each step of the process:

1. Capital is invested

Smart Allocator is a yield-sharing initiative where capital from USDD’s cash reserve is deployed into investment opportunities to earn returns in the form of interest and platform rewards.

• The overall investment strategy is conservative and under the USDD team’s dynamic monitoring.

• The chosen investment platforms such as Aave are selected by USDD and JUST DAO teams based on strict risk controls, prioritizing high liquidity and high reliability.

• The investment cap is set at a certain amount.

2. Investment is regularly reviewed.

• Investments will be made in steps.

• After the first investment is made, it will be carefully reviewed based on market conditions, liquidity amount, and amount of returns.

• This review will determine the next investment amount and chosen platform(s).

• This review process continues with each investment.

3. Returns are redistributed to users

As the investments earn yield, the protocol redistributes net returns back to users, excluding a small portion kept as a risk reserve.

• Returns are regularly redistributed as staking rewards, allocated based on users’ contribution to the ecosystem.

• The entire returns redistribution process is automated, on-chain, auditable, and fully transparent.

Users can track each step of the process and view various real-time metrics such as debt, invested amount, APY, etc.

USDD smart contracts have also passed , which found zero vulnerabilities outside of acceptable risks.

Benefits of Smart Allocator

Smart Allocator brings a range of benefits to both the USDD protocol and USDD users, enhancing user experience and system performance at the same time. Key benefits of Smart Allocator include:

• Creating sustainable yield — Reducing dependence on external subsidies and allowing for long-term growth

• Rewarding users with investment returns — Continuing to reward users by distributing regular yield from protocol-generated profits

• Improving USDD’s overall yield — Turning idle capital into income-generating assets

• Optimizing capital efficiency — Deploying surplus funds effectively without affecting user liquidity or redemption

How Do I Participate in Smart Allocator?

There is nothing you need to change or opt into. As a USDD user, you are ready to reap the benefits of Smart Allocator. Just continue staking USDD as you always have, and when the time comes, your share of the yield will flow back to you.

With Smart Allocator, USDD enters a new era of growth, where yield is generated sustainably, risk is carefully managed, and rewards are fairly shared.

Sustainable, Secure, Shared Yields. Let’s go!

Purpose

The Dog contract oversees the liquidation process. It monitors Vaults for undercollateralization and triggers auctions to sell collateral when necessary.

Key Responsibilities

• Tracks undercollateralized Vaults.

• Incentivizes keepers to liquidate risky positions.

Key Methods

• bark(ilk, urn, kpr) Initiates the liquidation process for a Vault (urn). Determines the amount of collateral to be auctioned and distributes liquidation rewards to keepers.

  hole: Maximum debt to liquidate per collateral type.

• digs(ilk, rad) Adjusts internal debt balances after liquidation is completed.

• file(what, ilk, data)

Welcome to usdd.io, a website-hosted user interface (the “Interface” or “App”) provided by the USDD Team (“we”, “our”, or “us”). The Interface provides access to decentralized protocols on the blockchain that support the USDD ecosystem and enable users to interact with various functionalities, including deposit, mint, payback, withdraw and manage digital assets. This Terms of Service Agreement (the “Agreement”) explains the terms and conditions by which you may access and use the Interface. By accessing or using the Interface, you signify that you have read, understand, and agree to be bound by this Agreement in its entirety. If you do not agree, you are not authorized to access or use the Interface.

1. Modification of this Agreement

We reserve the right, at our sole discretion, to modify this Agreement at any time. If we make any changes, we will update the "Last Modified" date at the beginning of the Agreement. Your continued use of the Interface after modifications constitutes your acceptance of the revised terms. If you disagree with any changes, you must stop accessing and using the Interface immediately.

To help users better manage their collateralized positions, USDD has officially launched the Risk Alert feature. With Risk Alert, you’ll be notified the moment your position approaches the liquidation threshold, allowing you to take timely action and avoid unnecessary losses.

Key Features

• Dual-channel notifications: On-page alerts + Email notifications

• Wallet signature verification: No gas fee required

• Quick and easy email binding

• Instant alerts for high-risk positions to help prevent liquidation

How to Enable Risk Alerts

Just 6 simple steps to enable email risk alerts:

Step1: Visit and connect your wallet.

Step2:

• Click the bell icon in the top right corner. 🔔

• Then, sign the smart contract to authorize access to the Risk Alert interface. This signature simply verifies ownership of your wallet address—no gas fees will be charged.

Step3: Connect and sign with your wallet

• You’ll be prompted to sign a message with your wallet.

• The signature is only used to verify ownership of the address—no gas fee will be charged.

• After signing, you’ll proceed to the next step.

Step4: Turn on Risk Alert

• Switch on the risk alert toggle to start receiving notifications.

Step5: Enter your email address

• Use a frequently checked email to receive timely alerts.

• Your email will only be used to send risk notifications.

Step6: Enter the verification code to complete the binding

• A one-time code will be sent to your email.

• Enter the code to finish binding your email to your wallet.

Once binding is complete, you can return to the same page anytime to turn email alerts on or off.

Two Types of Risk Alerts

1. On-Page Alerts (Always Active)

Risk warnings will automatically appear at the top of the page based on your Vault’s Collateral Ratio:

• High Risk Alert: Collateral Ratio is less than 5% above the liquidation line

• Moderate Risk Alert: Collateral Ratio is less than 10% above the liquidation line

No setup needed—alerts are always active and update in real time to keep you informed. \

2. Email Alerts (Manually Toggle On/Off)

• When enabled, the system will send an alert email whenever a risky position is detected. Perfect for users who are not always on the page—ensuring you receive important updates anytime, anywhere.

• You can manage this feature anytime through the bell icon in the top right corner.

• High Risk Alert: Collateral Ratio is less than 5% above the liquidation line

• Moderate Risk Alert: Collateral Ratio is less than

To ensure transparency and security, all collateral backing USDD is held in publicly verifiable smart contracts. Users can check the contract addresses on blockchain explorers to verify the funds at any time. This guarantees that the collateral remains untouched and fully secure.

🌐 Tron Network

Collateral Contracts

• USDD: TCrEVahRbhDFB6uRXEWUg7wkptXvg47GKs

• TRX-A: TJ1VWPvFVq7sVsN7J7dWJVZz4SLT14qRUr

• TRX-B:

• TRX-C:

• sTRX-A:

• USDT-A:

• PSM-USDT:

• SA001-A:

PSM Contracts

• PSM-USDT:

• USDTJoin:

🌐 Ethereum Network

PSM Contracts

• USDD:

• PSM-USDT:

• USDTJoin:

• PSM-USDC:

USDD Savings

• sUSDD:

🌐 BNB Chain Network

PSM Contracts

• USDD:

• PSM-USDT:

• USDTJoin:

USDD Savings

• sUSDD:

For real-time verification, visit the blockchain explorer and enter the contract address to check the fund balances.

To perform stablecoin-to-USDD conversions, navigate to the PSM page.

The PSM allows seamless, zero-fee exchanges between USDD and supported stablecoins, starting with USDT or USDC. Support for additional stablecoins will be added over time to enhance flexibility and accessibility for users.

How to Use the PSM

1. Select the Stablecoin: On the PSM page, choose the token you want to exchange for USDD or vice versa.
2. Enter the Token Amount: Input the amount of tokens you wish to swap. The transaction requires no service fees; however, ensure your wallet has enough TRX to cover the gas fees for the transaction.
3. Check Availability: The "Available" section displays the quantity of the target token currently available for exchange. Ensure your swap amount does not exceed the available limit.\

The PSM feature is designed for ease of use, offering fast and secure conversions without slippage or additional charges, making it an essential tool for users seeking to maintain the 1:1 USDD peg while interacting with other stablecoins.

Tron Mainnet

General

• wad: some quantity of tokens, usually as a fixed point integer with 18 decimal places.

• ray

The upgrade to USDD aims to enhance its security, decentralization, and overall stability. By incorporating more robust mechanisms, such as secure liquidation processes, dynamic collateral ratio adjustments, and enhanced risk management protocols, the new version ensures that USDD can better withstand market fluctuations while maintaining its 1:1 peg to the US dollar. For instance, when the USDD price deviates, arbitrage opportunities encourage buying or selling to bring the price back in line.

• Secure Liquidation Processes: These mechanisms swiftly handle under-collateralized positions, reducing systemic risk and maintaining the protocol’s stability.

• Dynamic Collateral Ratios: These adjust in response to market conditions, ensuring adequate collateralization and reducing vulnerability during volatile periods.

• Advanced Risk Management Tools: These include predictive analytics to monitor risks and prevent cascading liquidations during market stress.

This upgrade also introduces more community-driven features, empowering users to actively participate in governance and decision-making, ensuring that the protocol evolves based on collective input.

Additionally, the upgrade strengthens the system's transparency and efficiency, with improved collateral management and liquidity solutions. The new version of USDD is designed to provide users with a more secure and adaptable stablecoin, allowing for easier integration with decentralized finance (DeFi) platforms, and ensuring long-term growth and sustainability of the ecosystem.

This guide explains how to stake USDD to earn yield through sUSDD. By connecting your wallet, depositing USDD, and receiving sUSDD as proof of stake, you can start earning interest automatically. You can withdraw your funds at any time without a lock-up period.

1. Connect Your Wallet

• On the Earn page, select the Ethereum/BNB Chain network.

• Click Connect Wallet in the top-right corner.

• Choose your wallet from the popup.

• Once connected, your wallet address will appear on the page.

2. Deposit USDD

• Under Deposit, enter the amount of USDD you want to stake (cannot exceed your wallet balance).

• Click Approve/Deposit and confirm the transaction in your wallet.

• Once the transaction is confirmed:

  • You will see your sUSDD balance on the left side of the page.

  • The corresponding USDD value of your sUSDD will also be displayed.

• Over time, the USDD value of your sUSDD increases automatically, reflecting your earned yield.

3. Withdraw USDD

• Under Withdraw, enter the amount of USDD you want to withdraw.

• Click Withdraw and confirm the transaction in your wallet.

• After confirmation, your sUSDD will be burned, and you will receive the corresponding amount of USDD in your wallet.

• You can view all your actions in your transaction history.

✅ Notes

• There is no lock-up period — you can withdraw anytime.

• When withdrawing, you will receive your initial deposit plus the accumulated yield.

Purpose

Handles collateral auctions, where liquidated collateral is sold to cover bad debt. CLIP ensures auctions operate fairly and efficiently using a Dutch auction mechanism.

Key Responsibilities

The Migration feature offers a seamless way for users holding USDDOLD to upgrade to the new USDD version. With no time constraints on migration, users can convert their tokens at any time that suits them.

Steps to Migrate Your USDDOLD:

1. Navigate to the Migration Page: Visit the Migration Page to access the migration feature.
2. Enter the Migration Amount:

   • Specify the amount of USDDOLD you wish to convert to the new USDD.

   • Ensure that the entered amount does not exceed your wallet balance.
3. Confirm the Transaction:

   • Use your connected wallet to approve and confirm the migration.

   • Once confirmed, the equivalent amount of new USDD will be credited to your wallet.
4. No Fees, No Deadlines:

   • The migration process is gas-only transactions.

   • There is no deadline for migration, allowing you to upgrade at your convenience.

Why Migrate to the New USDD?

• Improved Stability: Enhanced mechanisms ensure the 1:1 peg to the US dollar.

• Full Decentralization: Upgraded governance structure with greater community participation.

• Better Integration: The new USDD supports seamless compatibility with DeFi platforms and tools.