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YieldBlox is a decentralized finance (DeFi) protocol for lending and borrowing built on Stellar. Users carry out all protocol functions using YieldBlox's smart contracts hosted on Stellar Turrets. These can be accessed either directly using API calls, or through a front-end such as Script3's YieldBlox web app.
A decentralized finance protocol is a financial application that does not rely on or require its users to trust a central intermediary. This is often achieved by building the protocol using immutable smart contracts that run on a distributed network. In YieldBlox's case, it operates using smart contracts built with the Stellar Turrets smart contract engine. There is no central organization that controls YieldBlox and no organization YieldBlox relies on to continue operating. This means that YieldBlox is non-custodial, trust-minimized, and censorship-resistant.
The DeFi money market landscape is competitive. There are a variety of money market protocols built on programmable blockchains like Ethereum and Solana. Nevertheless, YieldBlox has made several improvements on existing money market protocol models and created a unique offering.
Stellar is a unique blockchain in that it's an ideal backend for fintech platforms. It's easy for a small team to spin up a mobile application and plug into the Stellar network to provide their users with payment and trading capabilities. YieldBlox was built with these platforms in mind. Platforms can use YieldBlox to provide their users with lending and borrowing tools without reducing the decentralization of their platform. In addition, platforms can leverage YieldBlox's unique tokenomics model and isolated lending markets to bootstrap growth of their own platform, ease anchor adoption, and build a non-custodial revenue model. A further discussion of this potential can be found in this article written by Script3.
High Capital Efficiency
For money markets, high capital efficiency is directly correlated with high utility. The higher a money market protocol's capital efficiency is, the more useful deposits are for users. The most straightforward way to increase capital efficiency is by increasing the loan-to-value ratios offered by the protocol. However, this comes with an increased risk of underwater positions. YieldBlox's unique Default Protection mechanism greatly reduces the risk that underwater positions pose, allowing the protocol to safely offer high loan-to-value ratios.
Built on Stellar
YieldBlox is the first DeFi protocol built on Stellar. Stellar is an excellent platform for DeFi protocols with extremely fast transactions, low fees, and an ecosystem that is well equipped to tokenize real-world assets. Additionally, Stellar's focus on developing countries means YieldBlox will be able to serve a user base that has traditionally been hard for DeFi protocols to tap into.
YieldBlox brings a decentralized, on-ledger money market to the Stellar ecosystem. Within the ecosystem, this promises to:
- Increase and trading payment liquidity
- Improve capital productivity
- Reduce reliance on lending intermediaries like banks
- Serve a global market with a cost of less than $0.01 per transaction
The web app currently supports the following wallets:
As other interfaces begin to integrate YieldBlox, a list of these integrations will be shown here!
While they are very small, YieldBlox does have four types of fees:
YieldBlox users must pay Stellar Network fees and Stellar Turret fees for each transaction. Both of these fees are extremely low. We expect them to amount to less than one cent (< $0.01) per transaction.
YieldBlox liquidators must pay liquidation fees when they liquidate another user. These are a small portion of the liquidation incentive that they receive for the liquidation, they are paid to the YieldBlox escrow pool.
Using any application involves risk. There are four main risks user's should consider when using YieldBlox.
Smart Contract Risk
YieldBlox functions using smart contracts. If a bug was discovered and exploited it could result in loss of user funds. To mitigate this risk, the YieldBlox Protocol is currently seeking third-party audits, and will have a bug bounty to further ensure security.
Turret Protocol Risk
Yieldblox's smart contracts are built using the Stellar Turret's protocol. If a vulnerability was discovered in Turrets it could result in loss of user funds. More information on turret risks and an audit of the turret's protocol can be found on the Stellar Turrets website.
Malicious Turret Host Collusion
The Stellar Turret's protocol functions by uploading a smart contract to a set of turret's hosted by trusted organizations in the Stellar ecosystem. Each of these hosts creates a unique signing keypair that is associated with the smart contract. The protocol associated with the uploaded smart contract then adds these keypairs as signers to the protocol accounts that must be controlled by the smart contract using whatever signature structure they deem appropriate. When a user runs the contract by sending a request to a turret the turret builds and signs a Stellar transaction XDR based on the smart contract and returns the XDR and signature to the user. The user then attaches as many signatures as necessary to reach the protocol account's signing threshold to one of the returned XDRs and submits it to the network.
The catch is that turret signing keys can sign transactions without the smart contract being ran. The smart contract is more of an instruction set for turret coordination rather than a strict rule set. Therefore, if turret hosts were to become malicious, they could collude to sign malicious transactions. More information on this risk can be found on the Stellar Turrets website. YieldBlox mitigates this risk by only using turrets hosted by trustworthy ecosystem organizations and by requiring the majority of turrets to sign a transaction before it can be accepted by the network. Furthermore, the YieldBlox governance system can replace a turret on short notice should the turret become unreliable. More details on the Turrets supporting the YieldBlox protocol can be found in the developer docs section.
Stellar Decentralized Ledger Risk