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Go SDK flat structure refactor

We have refactored the Go SDK into a flat package structure to simplify imports and make the public API easier to discover. This is a breaking change.

What Changed

  • Types and services previously nested under subpackages are now exported directly from github.com/sumup/sumup-go.
  • Import paths that referenced nested modules need to be updated.

Migration

Update your imports and type references to use the root package. For example:

// Before
import "github.com/sumup/sumup-go/checkouts"


// After
import "github.com/sumup/sumup-go"

If you run into issues, please open a ticket or let us know.

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