NativeScript

class cometa.scripts.native_scripts.native_script.NativeScript(ptr)[source]

Bases: object

Represents a native script in Cardano.

Native scripts form an expression tree where the evaluation produces either true or false. They support signature requirements, time-locks, and boolean combinations (all, any, n-of-k).

Note that native scripts are recursive. There are no constraints on nesting or size, except that imposed by the overall transaction size limit.

__init__(ptr)[source]

Return type:: None

__enter__()[source]

Return type:: NativeScript

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

Return type:: None

__repr__()[source]

Return repr(self).

Return type:: str

classmethod from_pubkey(script_pubkey)[source]

Creates a NativeScript from a ScriptPubkey.

Parameters:: script_pubkey (ScriptPubkey) – The ScriptPubkey to wrap.
Returns:: A new NativeScript instance.
Raises:: CardanoError – If creation fails.
Return type:: NativeScript

classmethod from_all(script_all)[source]

Creates a NativeScript from a ScriptAll.

Parameters:: script_all (ScriptAll) – The ScriptAll to wrap.
Returns:: A new NativeScript instance.
Raises:: CardanoError – If creation fails.
Return type:: NativeScript

classmethod from_any(script_any)[source]

Creates a NativeScript from a ScriptAny.

Parameters:: script_any (ScriptAny) – The ScriptAny to wrap.
Returns:: A new NativeScript instance.
Raises:: CardanoError – If creation fails.
Return type:: NativeScript

classmethod from_n_of_k(script_n_of_k)[source]

Creates a NativeScript from a ScriptNOfK.

Parameters:: script_n_of_k (ScriptNOfK) – The ScriptNOfK to wrap.
Returns:: A new NativeScript instance.
Raises:: CardanoError – If creation fails.
Return type:: NativeScript

classmethod from_invalid_before(script)[source]

Creates a NativeScript from a ScriptInvalidBefore.

Parameters:: script (ScriptInvalidBefore) – The ScriptInvalidBefore to wrap.
Returns:: A new NativeScript instance.
Raises:: CardanoError – If creation fails.
Return type:: NativeScript

classmethod from_invalid_after(script)[source]

Creates a NativeScript from a ScriptInvalidAfter.

Parameters:: script (ScriptInvalidAfter) – The ScriptInvalidAfter to wrap.
Returns:: A new NativeScript instance.
Raises:: CardanoError – If creation fails.
Return type:: NativeScript

classmethod from_cbor(reader)[source]

Deserializes a NativeScript from CBOR data.

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

classmethod from_json(json)[source]

Creates a NativeScript from a JSON string.

Parameters:: json (str) – A JSON string containing the native script data.
Returns:: A new NativeScript deserialized from the JSON.
Raises:: CardanoError – If deserialization fails.
Return type:: NativeScript

to_cbor(writer)[source]

Serializes the native script to CBOR format.

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

property script_type: NativeScriptType

The type of this native script.

Returns:: The NativeScriptType value.

property hash: bytes

The hash of this native script.

Returns:: The 28-byte Blake2b hash.

to_pubkey()[source]

Converts this native script to a ScriptPubkey.

Returns:: The ScriptPubkey if this script is a pubkey script.
Raises:: CardanoError – If conversion fails or type mismatch.
Return type:: ScriptPubkey

to_all()[source]

Converts this native script to a ScriptAll.

Returns:: The ScriptAll if this script is an all script.
Raises:: CardanoError – If conversion fails or type mismatch.
Return type:: ScriptAll

to_any()[source]

Converts this native script to a ScriptAny.

Returns:: The ScriptAny if this script is an any script.
Raises:: CardanoError – If conversion fails or type mismatch.
Return type:: ScriptAny

to_n_of_k()[source]

Converts this native script to a ScriptNOfK.

Returns:: The ScriptNOfK if this script is an n-of-k script.
Raises:: CardanoError – If conversion fails or type mismatch.
Return type:: ScriptNOfK

to_invalid_before()[source]

Converts this native script to a ScriptInvalidBefore.

Returns:: The ScriptInvalidBefore if this script is an invalid_before script.
Raises:: CardanoError – If conversion fails or type mismatch.
Return type:: ScriptInvalidBefore

to_invalid_after()[source]

Converts this native script to a ScriptInvalidAfter.

Returns:: The ScriptInvalidAfter if this script is an invalid_after script.
Raises:: CardanoError – If conversion fails or type mismatch.
Return type:: ScriptInvalidAfter

__eq__(other)[source]

Checks equality with another NativeScript.

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

__hash__ = None