ScriptInvalidBefore

class cometa.scripts.native_scripts.script_invalid_before.ScriptInvalidBefore(ptr)[source]

Bases: object

Represents a time-lock script that requires a minimum slot.

This script evaluates to true if the lower bound of the transaction validity interval is a slot number Y, and Y >= X (the slot number in this script). This guarantees that the transaction is included in a slot >= X.

__init__(ptr)[source]

Initializes a ScriptInvalidBefore from an FFI pointer.

Parameters:: ptr – FFI pointer to the native cardano_script_invalid_before_t object.
Raises:: CardanoError – If the pointer is NULL.
Return type:: None

__enter__()[source]

Enters a context manager for the ScriptInvalidBefore object.

Returns:: Self for use in a with statement.
Return type:: ScriptInvalidBefore

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

Exits the context manager for the ScriptInvalidBefore object.

Parameters:

exc_type – The exception type if an exception occurred.
exc_val – The exception value if an exception occurred.
exc_tb – The exception traceback if an exception occurred.

Return type:

None

__repr__()[source]

Returns a string representation of the ScriptInvalidBefore object.

Returns:: A string representation showing the slot number.
Return type:: str

classmethod new(slot)[source]

Creates a new ScriptInvalidBefore with the given slot number.

Parameters:: slot (int) – The slot number representing the lower bound of validity.
Returns:: A new ScriptInvalidBefore instance.
Raises:: CardanoError – If creation fails.
Return type:: ScriptInvalidBefore

classmethod from_cbor(reader)[source]

Deserializes a ScriptInvalidBefore from CBOR data.

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

to_cbor(writer)[source]

Serializes the script to CBOR format.

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

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

property slot: int

The slot number representing the lower bound of validity.

Returns:: The slot number.

property hash: bytes

The hash of this native script.

Returns:: The 28-byte Blake2b hash.

__eq__(other)[source]

Checks equality with another ScriptInvalidBefore.

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

__hash__ = None