VkeyWitnessSet

class cometa.witness_set.vkey_witness_set.VkeyWitnessSet(ptr=None)[source]

Bases: Set[VkeyWitness]

Represents a set of verification key witnesses.

This collection type is used in transaction witness sets to hold all VKey witnesses (public key + signature pairs) that authorize the transaction.

__init__(ptr=None)[source]

Return type:: None

__enter__()[source]

Return type:: VkeyWitnessSet

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

Return type:: None

__repr__()[source]

Return repr(self).

Return type:: str

classmethod from_cbor(reader)[source]

Deserializes a VkeyWitnessSet from CBOR data.

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

classmethod from_list(witnesses)[source]

Creates a VkeyWitnessSet from an iterable of VkeyWitness objects.

Parameters:: witnesses (Iterable[VkeyWitness]) – An iterable of VkeyWitness objects.
Returns:: A new VkeyWitnessSet containing all the witnesses.
Raises:: CardanoError – If creation fails.
Return type:: VkeyWitnessSet

to_cbor(writer)[source]

Serializes the witness set to CBOR format.

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

add(witness)[source]

Adds a VKey witness to the set.

Parameters:: witness (VkeyWitness) – The VkeyWitness to add.
Raises:: CardanoError – If addition fails.
Return type:: None

get(index)[source]

Retrieves a VKey witness at the specified index.

Parameters:

index (int) – The index of the witness to retrieve.

Returns:

The VkeyWitness at the specified index.

Raises:

CardanoError – If retrieval fails.
IndexError – If index is out of bounds.

Return type:

VkeyWitness

property use_tag: bool

Whether the set uses Conway era tagged encoding.

Returns:: True if using tagged encoding, False for legacy array encoding.

__len__()[source]

Returns the number of witnesses in the set.

Return type:: int

__iter__()[source]

Iterates over all witnesses in the set.

Return type:: Iterator[VkeyWitness]

__getitem__(index)[source]

Gets a witness by index using bracket notation.

Parameters:: index (int)
Return type:: VkeyWitness

__bool__()[source]

Returns True if the set is not empty.

Return type:: bool

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

__contains__(item)[source]

Checks if an item is in the set.

Parameters:: item (object)
Return type:: bool

isdisjoint(other)[source]

Returns True if the set has no elements in common with other.

Parameters:: other (Iterable[VkeyWitness]) – Another iterable to compare with.
Returns:: True if the sets are disjoint.
Return type:: bool