What is core api and callback api?

In MongoDB, the Core API and Callback API are approaches to handle transactions, enabling operations across multiple documents or collections as a single atomic unit. Here’s an explanation of both and their differences

Core API: The Core API is a lower-level interface for managing MongoDB transactions. It provides explicit control over the transaction lifecycle, requiring developers to:

1
Start a transaction.
2
Handle errors manually.
3
Commit or abort the transaction explicitly.

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Callback API: The Callback API is a higher-level abstraction that simplifies transaction management. It automates aspects like retrying on transient errors and handling unknown commit results.

1
Reduces developer effort by automating retries and commit handling
2
Recommended for most general use cases to simplify transaction workflows.
3
Automatically incorporates error-handling logic for TransientTransactionError and UnknownTransactionCommmitResult.

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