BootstrapWitness

class cometa.witness_set.bootstrap_witness.BootstrapWitness(ptr)[source]

Bases: object

Represents a bootstrap witness for Byron-era addresses.

Bootstrap witnesses are used to sign transactions that spend from Byron-era addresses. They include additional information beyond just the public key and signature, such as the chain code and address attributes.

__init__(ptr)[source]

Return type:: None

__enter__()[source]

Return type:: BootstrapWitness

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

Return type:: None

__repr__()[source]

Return repr(self).

Return type:: str

classmethod new(vkey, signature, chain_code, attributes)[source]

Creates a new bootstrap witness.

Parameters:

vkey (bytes) – The verification key (32 bytes for Ed25519).
signature (bytes) – The signature (64 bytes for Ed25519).
chain_code (bytes) – The chain code (32 bytes).
attributes (bytes) – The address attributes (CBOR encoded).

Returns:

A new BootstrapWitness instance.

Raises:

CardanoError – If creation fails.

Return type:

BootstrapWitness

classmethod from_cbor(reader)[source]

Deserializes a BootstrapWitness from CBOR data.

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

to_cbor(writer)[source]

Serializes the witness to CBOR format.

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

property vkey: bytes

The verification key (public key).

Returns:: The 32-byte Ed25519 public key.

property signature: bytes

The signature.

Returns:: The 64-byte Ed25519 signature.

property chain_code: bytes

The chain code for key derivation.

Returns:: The 32-byte chain code.

property attributes: bytes

The address attributes (CBOR encoded).

Returns:: The attributes bytes.

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