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Building Full Stack DeFi Applications

You're reading from  Building Full Stack DeFi Applications

Product type Book
Published in Mar 2024
Publisher Packt
ISBN-13 9781837634118
Pages 490 pages
Edition 1st Edition
Languages
Concepts
Author (1):
Samuel Zhou Samuel Zhou
Profile icon Samuel Zhou
LinkedIn
Samuel Zhou has over 15 years of software engineering experience in top high tech companies including being a blockchain developer as his hobby since 2018. In 2022, Samuel turned his enthusiasm on blockchain technology into a business by founding TiFi, which is a silicon valley based startup that builds e-Commerce platform on blockchain and brings blockchain to everyday life. Over there he has created TiFi Token that offers token rebates so people can get cash back when spending the token. Also he has built TiFi Bank which is a DeFi application that offers crypto saving, lending, trading, staking and liquidity management features. Samuel holds a Master Degree and a Bachelor Degree in Computer Science.
Read more
See other products by Samuel Zhou
Toc

Table of Contents (21) Chapters close

Preface 1. Part 1: Introduction to DeFi Application Development
2. Chapter 1: Introduction to DeFi 3. Chapter 2: Getting Started with DeFi Application Development 4. Chapter 3: Interacting with Smart Contracts and DeFi Wallets in the Frontend 5. Part 2: Design and Implementation of a DeFi Application for Trading Cryptos
6. Chapter 4: Introduction to Decentralized Exchanges 7. Chapter 5: Building Crypto-Trading Smart Contracts 8. Chapter 6: Implementing a Liquidity Management Frontend with Web3 9. Chapter 7: Implementing a Token-Swapping Frontend with Web3 10. Chapter 8: Working with Native Tokens 11. Part 3: Building a DeFi Application for Staking and Yield Farming
12. Chapter 9: Building Smart Contracts for Staking and Farming 13. Chapter 10: Implementing a Frontend for Staking and Farming 14. Part 4: Building a Crypto Loan App for Lending and Borrowing
15. Chapter 11: An Introduction to Crypto Loans 16. Chapter 12: Implementing an Asset Pool Smart Contract for a Crypto Loan 17. Chapter 13: Implementing a Price Oracle for Crypto Loans 18. Chapter 14: Implementing the Crypto Loan Frontend with Web3 19. Index 20. Other Books You May Enjoy

Exploring the characteristics of a crypto loan

As we mentioned earlier, a crypto loan combines savings and loans together; this means the users have to deposit something via a smart contract as collateral before they can borrow assets. A crypto loan in the DeFi world has some unique characteristics, which are explained in the following sections.

Zero waiting time for approval

Everyone can get a loan immediately after providing the collateral. There is no need to provide other information or wait for approval before receiving the loan.

The loan qualification and the borrowing limit are determined by the value of collateral and the loan-to-value (LTV) parameter. LTV is a pre-configured parameter of an asset pool. Meanwhile, the borrowing limit also depends on the available assets in the asset pools. Here is the formula to calculate the borrowing limit (MathZone*IMGstyle="vertical-align:-0.406em;height:1.054em;width:3.632em"<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"><mml:msub><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mrow><mml:mi>b</mml:mi><mml:mi>o</mml:mi><mml:mi>r</mml:mi><mml:mi>r</mml:mi><mml:mi>o</mml:mi><mml:mi>w</mml:mi><mml:mo>_</mml:mo><mml:mi>l</mml:mi><mml:mi>i</mml:mi><mml:mi>m</mml:mi><mml:mi>i</mml:mi><mml:mi>t</mml:mi></mml:mrow></mml:msub></mml:math>) for a user:

MathZone*IMGstyle="vertical-align:-0.406em;height:1.320em;width:20.269em"<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"><mrow><mrow><mrow><msub><mi>V</mi><mrow><mi>b</mi><mi>o</mi><mi>r</mi><mi>r</mi><mi>o</mi><mi>w</mi><mo>&#x5f;</mo><mi>l</mi><mi>i</mi><mi>m</mi><mi>i</mi><mi>t</mi></mrow></msub><mo>&#x3d;</mo><mi>M</mi><mi>i</mi><mi>n</mi><mi>i</mi><mi>m</mi><mi>u</mi><mi>m</mi><mo>(</mo><msub><mrow><mi>L</mi><mi>T</mi><mi>V</mi><mi mathvariant="normal">*</mi><mi>V</mi></mrow><mrow><mi>c</mi><mi>o</mi><mi>l</mi><mi>l</mi><mi>a</mi><mi>t</mi><mi>e</mi><mi>r</mi><mi>a</mi><mi>l</mi><mi>s</mi></mrow></msub><mo>&#x2c;</mo><msub><mi>V</mi><mrow><mi>a</mi><mi>s</mi><mi>s</mi><mi>e</mi><mi>t</mi><mo>&#x5f;</mo><mi>a</mi><mi>v</mi><mi>a</mi><mi>i</mi><mi>l</mi><mi>a</mi><mi>b</mi><mi>l</mi><mi>e</mi></mrow></msub><mo>)</mo></mrow></mrow></mrow></math>

Here, MathZone*IMGstyle="vertical-align:-0.340em;height:0.988em;width:2.930em"<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"><mml:msub><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi><mml:mi>o</mml:mi><mml:mi>l</mml:mi><mml:mi>l</mml:mi><mml:mi>a</mml:mi><mml:mi>t</mml:mi><mml:mi>e</mml:mi><mml:mi>r</mml:mi><mml:mi>a</mml:mi><mml:mi>l</mml:mi><mml:mi>s</mml:mi></mml:mrow></mml:msub></mml:math> is the value of the collateral that the user provided. MathZone*IMGstyle="vertical-align:-0.406em;height:1.054em;width:4.064em"<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"><mml:msub><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mrow><mml:mi>a</mml:mi><mml:mi>s</mml:mi><mml:mi>s</mml:mi><mml:mi>e</mml:mi><mml:mi>t</mml:mi><mml:mo>_</mml:mo><mml:mi>a</mml:mi><mml:mi>v</mml:mi><mml:mi>a</mml:mi><mml:mi>i</mml:mi><mml:mi>l</mml:mi><mml:mi>a</mml:mi><mml:mi>b</mml:mi><mml:mi>l</mml:mi><mml:mi>e</mml:mi></mml:mrow></mml:msub></mml:math> is the value of available assets in the...

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Authors (1)

Left arrow icon
Profile icon Samuel Zhou
LinkedIn
Samuel Zhou has over 15 years of software engineering experience in top high tech companies including being a blockchain developer as his hobby since 2018. In 2022, Samuel turned his enthusiasm on blockchain technology into a business by founding TiFi, which is a silicon valley based startup that builds e-Commerce platform on blockchain and brings blockchain to everyday life. Over there he has created TiFi Token that offers token rebates so people can get cash back when spending the token. Also he has built TiFi Bank which is a DeFi application that offers crypto saving, lending, trading, staking and liquidity management features. Samuel holds a Master Degree and a Bachelor Degree in Computer Science.
Read more
See other products by Samuel Zhou
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