Data Weight

The weight of each value approximately corresponds to its size in bytes. Weight is used in limitations on creating and comparing values.

Weight Calculation

Data type	Weight of value
BigInt	64
Boolean	1
ByteVector	Size in bytes
Int	8
List	See Weight of List
String	Size in bytes
Structure	See Weight of Tuple or Structure
Tuple	See Weight of Tuple or Structure
Unit	40

Weight of List

The weight of the list is calculated as follows:

W_list = 20 + 20 × Q + W_elems

where:

• Q is a number of elements.
• W_elems is a total weight of elements.

Weight of Tuple or Structure

The weight of the tuple or structure is calculated as follows:

W_struct = 40 + 30 × Q + W_fields

where:

• Q is a number of fields.
• W_fields is a total weight of fields.

Example

Let's consider the AssetPair structure:

AssetPair(amountAsset: ByteVector|Unit, priceAsset: ByteVector|Unit)

An asset ID is a ByteVector of 32 bytes, its weight is 32. If both assets in the pair are not WAVES, then the weight of the AssetPair structure is:

W_AssetPair = 40 + 30 × 2 + (32 + 32) = 164

If one of the assets is WAVES, then the corresponding field is of type Unit and its weight is 40. Then the weight of the AssetPair structure is:

W_AssetPair = 40 + 30 × 2 + (32 + 40) = 172

Limitations

• The maximum weight of the value is 307200.
• A comparison of values is not allowed if the weight of each value exceeds 13000.

If the limitations are exceeded, the script fails.