You can cast a type into another type if you are sure they are compatible :
let a: int = int(1 as nat);const b : nat = abs (-3)
⚠️ You will not see a transpilation error if the types are not compatible but the execution will fail.
You can define Tezos addresses by casting a string to an address type :
const my_account: address = ("tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx" as address)
⚠️ You will not see a transpilation error if the address you enter is wrong but the execution will fail.
1- Define ship_address as tz1TGu6TN5GSez2ndXXeDX6LgUDvLzPLqgYV
2- Define vendor_address as tz1KqTpEZ7Yob7QbPE4Hy4Wo8fHG8LhKxZSx