How do you test integrations in blockchain based applications
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I have been exploring how backend systems interact with blockchain services and APIs, and one challenge that keeps coming up is testing.
In traditional systems, integration testing helps verify how services communicate with each other. But in blockchain based applications, things seem more complex. You have smart contracts, external APIs, wallets, and network delays all interacting together.
I am curious how developers approach testing in this kind of environment.
Do you rely on testnets, mocks, or real network interactions when validating integrations? Also, how do you handle unpredictable factors like transaction delays or failures?
I have been reading about integration testing approaches in distributed systems, and it made me think about how similar challenges apply here as well.
Would love to hear how others handle this in real projects.