An example of how to map a Tuple to a record.

TupleToRecord.ts

type Tuple = [
    {name: "one", type?: number}, 
    {name: "two", type: number}, 
    {name: "three", type: number[]}
];

type RecordFromTuple = {
    [P in Tuple[number] as P["name"]]: P["type"]
}

const record: RecordFromTuple = {
    one: undefined,
    two: 6,
    three: [7]
}