export interface ObjectInterface{
  [key: string]: string | number | string[];
}

this is a interface I'm using, imported to the function(given below) from types.ts

the code below is for a function doing something

async createTaskService({
    A,
    B,
    C,
  }: ObjectInterface) {
      A = A as string
      B = B as string[]
      C = C as number
      //other stuff --unrelated
  }

Restrictions are that the keys of ObjectInterface cannot be "named" as in the keys must remain variable strings. What I want to know is if there's a better way to accept the parameters and set their types rather than doing X = X as string etc.