Type Alias RequireOnlyOne<T, Keys>

RequireOnlyOne: Pick<T, Exclude<keyof T, Keys>> & {
    [K in Keys]-?: Required<Pick<T, K>> & Partial<
        Record<Exclude<Keys, K>, undefined>,
    >
}[Keys]

This type implementation allows to specify for a given T type two field with only one that have to be field. You can find more about this here: https://learn.microsoft.com/en-us/javascript/api/@azure/keyvault-certificates/requireatleastone?view=azure-node-latest

Type Parameters

T
Keys extends keyof T = keyof T