Sharing common context between all mutations

[SirVizzy]

In our current codebase we are rewriting a lot of logic that goes something along the lines of this;

const useExampleMutation = () => {
  return useMutation({
    mutationFn: () => {
      return Promise.resolve()
    },
    onMutate: () => {
      return {
        currency: getCurrencyFromStorage(),
      }
    },
    onSuccess: (_data, _variables, context) => {
      console.log(`User completed mutation in ${context.currency}`)
    },
  })
}

Instead of this I'd like a way of extending the context so that all mutations can access the currency in which the mutation was created with. Initially I believed this would have been quite easy using the MutationCache and extending the onMutate function. However this does not work.

What would be the tanstack way of creating a shared context for all our mutations?