flat_fee::FlatFee has store, key

public fun new(rate_bps: u64, ctx: &mut tx_context::TxContext): 
    flat_fee::FlatFee

public entry fun init_fee(
    rate: u64,
    ctx: &mut tx_context::TxContext,
)

public entry fun collect_proceeds_and_fees<FT>(
    marketplace: &marketplace::Marketplace,
    listing: &mut listing::Listing,
    ctx: &mut tx_context::TxContext,
)