pub trait TokenPaymentInfoMethodsV0: TokenPaymentInfoAccessorsV0 {
// Provided methods
fn is_valid_for_required_cost(&self, required_cost: TokenAmount) -> bool { ... }
fn matches_token_contract(
&self,
contract_id: &Option<Identifier>,
token_contract_position: TokenContractPosition,
) -> bool { ... }
fn token_id(&self, current_contract_id: Identifier) -> Identifier { ... }
}