TransactionInput

class cometa.transaction_body.transaction_input.TransactionInput(ptr)[source]

Bases: object

Represents a reference to an unspent transaction output (UTXO) being spent.

A transaction input consists of: - Transaction ID: The hash of the transaction containing the UTXO - Index: The index of the output within that transaction

__init__(ptr)[source]

Return type:: None

__enter__()[source]

Return type:: TransactionInput

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

Return type:: None

__repr__()[source]

Return repr(self).

Return type:: str

classmethod new(transaction_id, index)[source]

Creates a new TransactionInput.

Parameters:

transaction_id (bytes) – The 32-byte transaction hash.
index (int) – The output index within the transaction.

Returns:

A new TransactionInput instance.

Raises:

CardanoError – If creation fails.

Return type:

TransactionInput

classmethod from_hex(transaction_id_hex, index)[source]

Creates a new TransactionInput from a hex-encoded transaction ID.

Parameters:

transaction_id_hex (str) – The transaction hash as a hex string.
index (int) – The output index within the transaction.

Returns:

A new TransactionInput instance.

Raises:

CardanoError – If creation fails.

Return type:

TransactionInput

classmethod from_cbor(reader)[source]

Deserializes a TransactionInput from CBOR data.

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

to_cbor(writer)[source]

Serializes the transaction input 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 transaction input to CIP-116 JSON format.

CIP-116 defines a standard JSON representation for Cardano transactions.

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

Example

>>> from cometa.json import JsonWriter
>>> input = TransactionInput.from_hex(tx_hash, 0)
>>> writer = JsonWriter()
>>> input.to_cip116_json(writer)
>>> json_str = writer.encode()

property transaction_id: bytes

The transaction ID (hash of the transaction containing the UTXO).

Returns:: The 32-byte transaction hash.

property index: int

The output index within the transaction.

Returns:: The output index.

__eq__(other)[source]

Checks equality with another TransactionInput.

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

__lt__(other)[source]

Compares this input with another for ordering.

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

__hash__()[source]

Returns hash for use in sets and dicts.

Return type:: int