DefaultHttpClient returns an http client with defaultTimeout specified above.

SafeStr safely dereferences a string pointer and returns its value if it is non-nil, or the empty string if it is nil.

SPtr returns a pointer to the string value s.

UserAgent specifies the Sleet library and version for PsPs that require this header.

DefaultTimeout for HTTP Requests.

LibraryVersion lists current sleet version following Semantic Versioning.

Environment provides a common way of interacting with Sleet's PsP Sandbox refers to non-live, typically test accounts and Production to live accounts Done at the Sleet level to avoid clients having to import Payment specific data.