enqueue_exact_quantity for an order that names a builder: code is the
builder code the trade pays and builder_fee_per_contract its fee per contract,
in FLOAT_SCALING of the $1 payout. Predict caps the fee at
protocol_config::builder_fee_cap, records it in the order's receipt, and
prices the order's limits with it, and the fill pays quantity * fee, rounded
down, to the code. Refuses orders like enqueue_exact_quantity. Returns the new
record ID.
enqueue_exact_quantityfor an order that names a builder:codeis the builder code the trade pays andbuilder_fee_per_contractits fee per contract, in FLOAT_SCALING of the $1 payout. Predict caps the fee atprotocol_config::builder_fee_cap, records it in the order's receipt, and prices the order's limits with it, and the fill paysquantity * fee, rounded down, to the code. Refuses orders likeenqueue_exact_quantity. Returns the new record ID.