pub type GivenFreeCredits<T: Config> = StorageMap<_, Blake2_128Concat, ParaId, (), OptionQuery>;
pub type MaxTip<T: Config> = StorageMap<_, Blake2_128Concat, ParaId, BalanceOf<T>, OptionQuery>;
/// Set the maximum tip a container chain is willing to pay to be assigned a collator on congestion.
/// Returns the cost for a given block credit at the current time. This can be a complex operation,
/// Returns the cost for a given block credit at the current time. This can be a complex operation,
// This hook is called when pallet_author_noting sees that the block number of a container chain has increased.
// Currently we always charge 1 credit, even if a container chain produced more that 1 block in between tanssi