Recently, a heartbreaking phenomenon has been discovered: a bunch of smart contract developers, when integrating top-tier oracles like Apro, are all thinking "just connect and it's done"—as if a data source malfunction could be easily blamed.

Dream on. The harsh truth is much more brutal: the moment you connect to a data source, you become the last line of defense. Oracles provide "verified on-chain facts," but how you use these facts, and what you turn them into, is entirely your responsibility.

To put it another way: imagine a hospital buys a set of imported sterile surgical knives. The knives themselves are fine, but if the patient dies on the operating table, can you blame the knife? Obviously not. The problem lies in the surgeon's skill, not the tools.

Developers must remember these four ironclad rules:

**Rule 1: Data is just raw material; developers are the true helmsmen**

Apro provides high-quality raw data that has been verified through decentralization. But if you over-salt the dish, burn it, or cause issues for users—it's your fault. You must build your own data quality monitoring system.

For example, if prices suddenly spike or plummet beyond theoretical volatility ranges, did your contract have circuit breakers? Or did it allow these abnormal prices to trigger mass liquidations? When the network encounters issues or data is delayed, do your applications just wait passively, or automatically switch to backup safety plans? These things cannot be handled by the data source.

**Rule 2: Code quality determines everything**

The strongest data, if paired with buggy code, leads to disaster. You can't use functions that haven't undergone rigorous testing or have hidden risks of memory overflow to handle real money price information.

In plain terms, your coding skills must match the data source you choose. This is not optional; it's fundamental.