Gateway to Learning

Blockchain is regarded as a technological foundation capable of providing trusted computing and decentralized collaboration, ensuring the security and verifiability of on-chain data through consensus mechanisms and cryptographic structures. However, this highly secure design also brings a significant limitation: the blockchain itself is a closed system that cannot directly access real-world information. As more financial and commercial applications begin to operate on-chain, the importance of external data has become increasingly prominent. Whether it is asset prices, macroeconomic indicators, or real-world events, this information has become a critical condition for the proper functioning of smart contracts. How to introduce off-chain data onto the chain while ensuring security and trustworthiness has become a core issue that the Web3 ecosystem must solve, and oracles are the key infrastructure born out of this context.

Real World Assets (RWA) are becoming an important bridge connecting Traditional Finance (TradFi) and blockchain finance. Through asset tokenization, real-world assets such as government bonds, real estate, credit, and precious metals can be introduced into blockchain networks, achieving higher liquidity, lower entry barriers, and a more transparent trading environment.

Stablecoins have evolved from settlement tools for crypto transactions into the core infrastructure of the on-chain financial system. Whether it's trading, lending, or cross-chain liquidity, most on-chain financial activities revolve around stablecoins. In a sense, they constitute the "monetary layer" of the blockchain world. This course begins with stablecoins to systematically outline the logic behind the formation of on-chain finance: from the credit structure of stablecoins, to liquidity networks, and then to the DeFi credit market. It also compares these with the institutional differences in traditional finance, helping readers understand how on-chain finance is gradually forming a new infrastructure structure.