Costmdls

class cometa.protocol_params.costmdls.Costmdls(ptr)[source]

Bases: object

A collection of cost models for different Plutus language versions.

This class holds a map of Plutus language versions to their respective cost models. It provides methods to insert, retrieve, and check for cost models by language version.

__init__(ptr)[source]

Return type:: None

__enter__()[source]

Return type:: Costmdls

__exit__(exc_type, exc_val, exc_tb)[source]

Return type:: None

__repr__()[source]

Return repr(self).

Return type:: str

__contains__(language)[source]

Checks if a cost model exists for the given language version.

Parameters:: language (PlutusLanguageVersion)
Return type:: bool

__getitem__(language)[source]

Gets the cost model for a specific language version.

Parameters:: language (PlutusLanguageVersion) – The Plutus language version.
Returns:: The CostModel for that version.
Raises:: KeyError – If no cost model exists for the language.
Return type:: CostModel

__setitem__(language, model)[source]

Sets the cost model for a language version.

Note: The language version is determined by the model itself.

Parameters:

language (PlutusLanguageVersion) – The Plutus language version (unused, for dict-like interface).
model (CostModel) – The CostModel to insert.

Return type:

None

classmethod new()[source]

Creates a new empty Costmdls collection.

Returns:: A new empty Costmdls instance.
Raises:: CardanoError – If creation fails.
Return type:: Costmdls

classmethod from_cbor(reader)[source]

Deserializes Costmdls from CBOR data.

Parameters:: reader (CborReader) – A CborReader positioned at the costmdls data.
Returns:: A new Costmdls deserialized from the CBOR data.
Raises:: CardanoError – If deserialization fails.
Return type:: Costmdls

to_cbor(writer)[source]

Serializes the costmdls to CBOR format.

Parameters:: writer (CborWriter) – A CborWriter to write the serialized data to.
Raises:: CardanoError – If serialization fails.
Return type:: None

insert(cost_model)[source]

Inserts a cost model into the collection.

The language version is determined by the cost model itself.

Parameters:: cost_model (CostModel) – The CostModel to insert.
Raises:: CardanoError – If insertion fails.
Return type:: None

get(language)[source]

Retrieves a cost model for a specific language version.

Parameters:: language (PlutusLanguageVersion) – The Plutus language version.
Returns:: The CostModel if found, None otherwise.
Return type:: CostModel | None

has(language)[source]

Checks if a cost model exists for a specific language version.

Parameters:: language (PlutusLanguageVersion) – The Plutus language version to check.
Returns:: True if a cost model exists, False otherwise.
Return type:: bool

get_language_views_encoding()[source]

Gets the language views encoding for computing script data hash.

This encodes the cost models following the CDDL specification, necessary for computing the script data hash of a transaction.

Returns:: A Buffer containing the encoded language views.
Raises:: CardanoError – If encoding fails.
Return type:: Buffer

to_cip116_json(writer)[source]

Serializes this object to CIP-116 compliant JSON.

Parameters:: writer (JsonWriter) – The JsonWriter to write the JSON to.
Raises:: CardanoError – If serialization fails.
Return type:: None