What is the correct way of typing the result of a mutation

[hornta]

I'm in need of creating a separate type of a mutations result but I fail to do so. I feel like I've typed it all correctly but some how TS is still confused.

// type of function that mutates
type MyMutation = ReturnType<
  typeof useMyMutation
>[0];

// type of what input goes into the above function type
export type MutationInput=
  Parameters<MyMutation >[0];

// type of function that takes the above input and returns what the mutation function returns
export type OnMutateFunction = (
  input: MutationInput[]
) => ReturnType<MyMutation>;

// inside my react component
const [mutate] = useMyMutation();

// the typescript error highlights the input parameter with the error below
const onMutate:OnMutateFunction = (input) => {
  return mutate(input);
};

(parameter) input: {
    scenarioId: string;
    objectTransactions: ({
        planId: string;
        amount: number;
        quantity: number;
        spread: number;
        periodFrom: string;
        periodTo: string;
        allocationKeyId: string | null;
        distribution: {
            ...;
        }[];
        per: string;
        generalObjectId: string | null;
        accountId: string | null;
        allocation: {
            ...;
        }[] | null;
    } & ({
        ...;
    } | {
        ...;
    }))[];
}[]
Argument of type '{ scenarioId: string; objectTransactions: ({ planId: string; amount: number; quantity: number; spread: number; periodFrom: string; periodTo: string; allocationKeyId: string | null; distribution: { ...; }[]; per: string; generalObjectId: string | null; accountId: string | null; allocation: { ...; }[] | null; } & ({ ....' is not assignable to parameter of type '{ scenarioId: string; objectTransactions: ({ planId: string; amount: number; quantity: number; spread: number; periodFrom: string; periodTo: string; allocationKeyId: string | null; distribution: { ...; }[]; per: string; generalObjectId: string | null; accountId: string | null; allocation: { ...; }[] | null; } & ({ ....'.
  Type '{ scenarioId: string; objectTransactions: ({ planId: string; amount: number; quantity: number; spread: number; periodFrom: string; periodTo: string; allocationKeyId: string | null; distribution: { ...; }[]; per: string; generalObjectId: string | null; accountId: string | null; allocation: { ...; }[] | null; } & ({ ....' is missing the following properties from type '{ scenarioId: string; objectTransactions: ({ planId: string; amount: number; quantity: number; spread: number; periodFrom: string; periodTo: string; allocationKeyId: string | null; distribution: { ...; }[]; per: string; generalObjectId: string | null; accountId: string | null; allocation: { ...; }[] | null; } & ({ ....': scenarioId, objectTransactionsts(2345)