Get the owner of the inputs (of type Input::Coin or Input::Message) to a
TransactionScript if they all share the same owner.

Returns

• [Result<Address, AuthError>] - Ok(Address) if the single owner can be determined, Err(AuthError) otherwise.

Examples

use std::auth::caller_address;

fn foo() {
    match caller_address() {
        Ok(address) => log(address),
        Err(AuthError::InputsNotAllOwnedBySameAddress) => log("Inputs not all owned by the same address."),
        Err(AuthError::CallerIsInternal) => log("Hell froze over."),
    }
}