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Legacy Frax Dollar (FRAX) is the original, partially algorithmic stablecoin from the Frax Finance ecosystem, representing a foundational piece of DeFi's evolution towards hybrid stablecoin models.

Key takeaways

• Legacy FRAX is the original token from the Frax Protocol, a partially algorithmic stablecoin designed to maintain a 1:1 peg to the US dollar.
• It operates on a hybrid collateral model, backed by a combination of off-chain assets (like USDC) and the protocol's governance token, FXS.
• The token has been succeeded by FRAX v3, a fully collateralized stablecoin, with Legacy FRAX remaining as a tradable asset representing the original system.
• Its primary use was within the Frax ecosystem for lending, borrowing, and as a stable medium of exchange in various DeFi applications.
• Legacy FRAX is an ERC-20 token primarily on Ethereum and its Layer 2, Fraxtal, and can be traded on major exchanges like BTCC.

What is Legacy Frax Dollar? Key Specifications & Tokenomics

Legacy Frax Dollar (FRAX) is the inaugural stablecoin from the Frax Finance protocol, pioneering a unique hybrid model that blends collateralized and algorithmic mechanisms to maintain its dollar peg.

Who created Legacy Frax Dollar (FRAX)?

The Frax Protocol and the Legacy FRAX stablecoin were created by Sam Kazemian and Travis Moore. Kazemian, the founder, conceptualized Frax as the "first fractional-algorithmic stablecoin." The project launched in December 2020. Development is overseen by the Frax DAO, a decentralized autonomous organization where governance token (FXS) holders vote on key protocol parameters and upgrades. The team's vision was to create a scalable, decentralized stablecoin that was more capital-efficient than purely over-collateralized models like DAI.

How does Legacy Frax Dollar (FRAX) work?

Legacy FRAX operated on a sophisticated, two-token system to maintain its 1 USD peg.

• Hybrid Collateral Model: Each FRAX token was backed by a combination of real-world asset collateral (primarily USDC) and an algorithmic component represented by the FXS governance token. The collateral ratio (CR) determined the mix, fluctuating based on market demand.
• Peg Stability Mechanism: If FRAX traded above $1, the protocol would mint and sell new FRAX, using the proceeds to buy and burn FXS, increasing the collateral ratio. If FRAX traded below $1, the system would mint and sell new FXS to buy back and burn FRAX, decreasing the collateral ratio and incentivizing arbitrageurs to restore the peg.
• FraxPool: Users could mint FRAX by depositing a value-weighted basket of collateral (e.g., USDC) and FXS into the FraxPool, or redeem FRAX for these assets, directly enforcing the peg through arbitrage.

What makes Legacy Frax Dollar (FRAX) unique and valuable?

Legacy FRAX's core innovation was its fractional-algorithmic design, which offered distinct advantages during its operational phase.

• Capital Efficiency: By not requiring 100%+ collateralization like other decentralized stablecoins, it used capital more efficiently, freeing up value for other DeFi activities.
• Decentralization & Stability Balance: It aimed to be more decentralized than fully fiat-backed stablecoins (USDC, USDT) while being more stable and scalable than purely algorithmic models that lacked collateral.
• Protocol-Controlled Value (PCV): A portion of the collateral in the system was owned and managed by the protocol itself (the Frax DAO), creating a native treasury that could generate yield and fund ecosystem development.
• Historical Significance: As the first successful implementation of a fractional-algorithmic stablecoin, it holds historical value in the evolution of DeFi monetary experiments and inspired subsequent designs.

What is Legacy Frax Dollar (FRAX) used for?

While succeeded by FRAX v3, Legacy FRAX retains utility and historical context.

• DeFi Trading & Liquidity: It is a tradable asset on decentralized (DEXs) and centralized exchanges like BTCC, often used in liquidity pools.
• Redemption for FRAX v3: Holders can seamlessly redeem Legacy FRAX for the new, fully collateralized FRAX v3 stablecoin at a 1:1 ratio through the official Frax Finance interface.
• Historical Reference: It serves as a key reference asset for understanding the mechanics and economic history of the Frax ecosystem's development from a hybrid to a fully collateralized model.

How Is the Legacy Frax Dollar (FRAX) ecosystem developing?

The ecosystem around Legacy FRAX has transitioned, with focus shifting to its successor.

• Transition to FRAX v3: The primary development is the complete migration to FRAX v3, a 100% collateralized stablecoin backed by cash-equivalent assets and yield-generating strategies. Legacy FRAX exists as a representation of the old system.
• Fraxtal L2 Growth: The Frax ecosystem's Layer 2 blockchain, Fraxtal, built using the OP Stack, is a major growth vector. It uses FRAX (v3) for gas fees and aims to become a hub for decentralized finance.
• Frax Ether (frxETH) & sFRAX: Ecosystem expansion continues with products like frxETH (a liquid staking derivative) and sFRAX (a yield-bearing version of FRAX v3), building utility beyond the original stablecoin.

How to mine Legacy Frax Dollar (FRAX)?

FRAX is a stablecoin and is not mined through traditional proof-of-work or proof-of-stake mechanisms. It is minted algorithmically by the Frax Protocol based on economic demand and peg stability conditions. Users could participate in the system's stability by:

• Providing Liquidity: Supplying FRAX and other assets to liquidity pools on DEXs to earn trading fees and potential liquidity mining rewards in FXS.
• Minting/Redeeming: Interacting directly with the Frax Protocol to mint new FRAX (when the price is >$1) or redeem it for its underlying collateral (when the price is <$1), earning arbitrage profits that help maintain the peg.

How to keep your FRAX Coin safe?

Securing Legacy FRAX involves standard practices for managing ERC-20 tokens.

• Use a Secure Wallet: Store your FRAX in a reputable non-custodial wallet like a hardware wallet (Ledger, Trezor) or a well-audited software wallet (MetaMask). Never share your private keys or seed phrase.
• Verify Contracts: When interacting with DeFi protocols to redeem or provide liquidity, always verify you are using the official, audited smart contract addresses from the Frax Finance website.
• Beware of Scams: Be cautious of unsolicited offers and fake websites. Bookmark the official Frax Finance portal and double-check all URLs.
• Exchange Security: For tokens held on exchanges like BTCC, enable all available security features such as two-factor authentication (2FA) and withdrawal whitelisting.

How to buy FRAX Coin?

FRAX is a popular cryptocurrency listed on many exchanges. However, it is recommended to trade on a major platform like BTCC exchange for higher liquidity and better customer support.

1. Register a BTCC Account: Sign up using your email or mobile number and complete the KYC verification to unlock more features and benefits of the platform.
2. Deposit Funds: Deposit fiat currency (via bank transfer, card, or third-party payment) or transfer USDT from an external wallet into your BTCC account. You can follow this guide.
3. Start Trading: Go to the trading page and search for the spot trading pair FRAX/USDT or the perpetual contract FRAXUSDT.
4. Place an Order: Enter the amount of FRAX you wish to purchase and submit the order. For contract trading, you can also choose to go short (sell) and adjust the leverage multiplier according to your strategy and risk tolerance.
5. Confirm Your Purchase: For spot purchases, check your personal account to see if the coins have arrived. For contract trades, check the trading page to see if your order was filled successfully.