In simple terms — DeFi uses blockchain networks and smart contracts to provide trading, lending, and other financial functions. “Decentralized” does not mean free of intermediaries or trust: the reader still needs to identify who controls keys, data, upgrades, and liquidity.
This chapter begins with the questions that precede any yield: where are the assets recorded, who can sign, how does data reach the contract, and which dependencies can fail? Only then does it connect pools, incentives, and transaction ordering. It is a public, technically verifiable foundation, not a trading signal or a rule of the Emiciclo Method.
The CEX, DEX, and OTC bridge places DeFi trading in the wider crypto market. It separates venue architecture, price formation, asset control, and settlement without treating “DEX” as an automatic synonym for AMM or for the absence of intermediaries.
To begin one step earlier — with asset identity, transactions, and staking — use Digital assets and crypto markets. This DeFi hub remains the next layer for protocol mechanics.
Crypto trust map
Value and supply — Stablecoins and depeg separate the market price from a redemption promise. Tokenomics and token unlocks separate supply, distribution, and potential selling pressure from any certain effect on price.
Control — Crypto wallets make clear that assets are not “inside” an app. Self-custody explains when the holder directly controls the keys and which responsibilities cannot be delegated.
Dependencies — Blockchain bridges, oracles, and smart-contract risk connect networks, external data, and code. Protocol risk then reconstructs the full chain: the robustness of one layer does not certify the others.
From components to DeFi mechanisms
The operational path begins with a liquidity pool. A provider may receive fees or incentives through liquidity mining and yield farming, but these must be compared with impermanent loss, costs, and protocol risk. TVL describes value included under a stated methodology; by itself, it does not measure security, solvency, or yield quality.
Flash loans make capital available within one atomic transaction. MEV concerns value that can be extracted through the inclusion and ordering of transactions; a sandwich attack is one specific form. Honeypots and rug pulls instead call for checks on sale restrictions, privileges, and the ability to remove liquidity.
A four-question verification method
- Control — Who signs? Are there a custodian, multisig, admin key, proxy, or recovery procedures?
- Value — What does the token represent? Which reserves, redemption rights, emissions, and unlocks exist?
- Dependencies — Which bridges, oracles, frontends, keepers, or other contracts does the operation rely on?
- Exit — Under which conditions can the user withdraw or sell, with what liquidity, finality, slippage, and blocking risk?
A code audit is useful evidence, not a guarantee. It may cover a specific version and scope; upgrades, configurations, dependencies, and economic conditions can change. Likewise, “non-custodial”, “trustless”, and “DAO” name properties that must be verified, not security certificates.
Reading paths
Getting started — Crypto wallet → self-custody → stablecoin → depeg.
Infrastructure and tokens — Tokenomics → token unlock → bridge → oracle → smart-contract risk → protocol risk.
DeFi mechanisms and risks — Liquidity pool → TVL → impermanent loss → liquidity mining and yield farming → flash loan → MEV → sandwich attack, honeypot, and rug pull.
Sources
- NIST IR 8301 — Blockchain Networks: Token Design and Management — keys, tokens, wallets, and custody models.
- NIST IR 8408 — Stablecoin Technology and Security Considerations — architectures, stabilisation mechanisms, and risk surfaces.
- Financial Stability Board — The Financial Stability Risks of DeFi — vulnerabilities, interconnections, and transmission channels.
- IOSCO — Final DeFi Policy Recommendations — activities, governance, and responsibility in DeFi arrangements.
- Ethereum.org — DeFi — technical overview of the ecosystem and its main use cases.