Transaction

Parameters: criteria – A function that takes in three input arguments (policy_id, asset_name, amount) and returns a bool. If returned value is True, then the asset will be kept, otherwise discarded.
Returns: A new filtered MultiAsset object.

count(criteria=typing.Callable[[pycardano.hash.ScriptHash, pycardano.transaction.AssetName, int], bool]) → int

Count number of distinct assets that satisfy a certain criteria.

Parameters: criteria – A function that takes in three input arguments (policy_id, asset_name, amount) and returns a bool.
Returns: Total number of distinct assets that satisfy the criteria.
Return type: int

class pycardano.transaction.Value(coin: 'int' = 0, multi_asset: 'MultiAsset' = <factory>)

Bases: pycardano.serialization.ArrayCBORSerializable

coin: int = 0: Amount of ADA

multi_asset: pycardano.transaction.MultiAsset: Multi-assets associated with the UTxO

union(other: Union[pycardano.transaction.Value, int]) → pycardano.transaction.Value

to_shallow_primitive()

Returns: A CBOR primitive.
Return type: Primitive
Raises: SerializeException – When the object could not be converted to CBOR primitive types.

class pycardano.transaction.TransactionOutput(address: 'Address', amount: 'Union[Value]', datum_hash: 'Optional[DatumHash]' = None, datum: 'Optional[Datum]' = None, script: 'Optional[Union[NativeScript, PlutusV1Script, PlutusV2Script]]' = None, post_alonzo: 'Optional[bool]' = False)

Bases: pycardano.serialization.CBORSerializable

address: pycardano.address.Address

amount: pycardano.transaction.Value

datum_hash: Optional[pycardano.hash.DatumHash] = None

datum: Optional[Union[pycardano.plutus.PlutusData, dict, pycardano.serialization.IndefiniteList, int, bytes, pycardano.serialization.RawCBOR, pycardano.plutus.RawPlutusData]] = None

script: Optional[Union[pycardano.nativescript.NativeScript, pycardano.plutus.PlutusV1Script, pycardano.plutus.PlutusV2Script]] = None

post_alonzo: Optional[bool] = False

validate()

Validate the data stored in the current instance. Defaults to always pass.

Raises: InvalidDataException – When the data is invalid.

property lovelace: int

to_primitive() → Union[bytes, bytearray, str, int, float, decimal.Decimal, bool, None, tuple, list, pycardano.serialization.IndefiniteList, dict, collections.defaultdict, collections.OrderedDict, undefined_type, datetime.datetime, re.Pattern, CBORSimpleValue, _cbor2.CBORTag, set, frozenset]

Convert the instance and its elements to CBOR primitives recursively.

Returns: A CBOR primitive.
Return type: Primitive
Raises: SerializeException – When the object or its elements could not be converted to CBOR primitive types.

classmethod from_primitive(value: Union[bytes, bytearray, str, int, float, decimal.Decimal, bool, None, tuple, list, pycardano.serialization.IndefiniteList, dict, collections.defaultdict, collections.OrderedDict, undefined_type, datetime.datetime, re.Pattern, CBORSimpleValue, _cbor2.CBORTag, set, frozenset]) → pycardano.transaction.TransactionOutput

Turn a CBOR primitive to its original class type.

Parameters

cls (CBORBase) – The original class type.
value (Primitive) – A CBOR primitive.

Returns

A CBOR serializable object.

Return type

CBORBase

Raises

DeserializeException – When the object could not be restored from primitives.

class pycardano.transaction.UTxO(input: 'TransactionInput', output: 'TransactionOutput')

Bases: pycardano.serialization.ArrayCBORSerializable

input: pycardano.transaction.TransactionInput

output: pycardano.transaction.TransactionOutput

class pycardano.transaction.TransactionBody(inputs: 'List[TransactionInput]' = <factory>, outputs: 'List[TransactionOutput]' = <factory>, fee: 'int' = 0, ttl: 'Optional[int]' = None, certificates: 'Optional[List[Certificate]]' = None, withdraws: 'Optional[Withdrawals]' = None, update: 'Any' = None, auxiliary_data_hash: 'Optional[AuxiliaryDataHash]' = None, validity_start: 'Optional[int]' = None, mint: 'Optional[MultiAsset]' = None, script_data_hash: 'Optional[ScriptDataHash]' = None, collateral: 'Optional[List[TransactionInput]]' = None, required_signers: 'Optional[List[VerificationKeyHash]]' = None, network_id: 'Optional[Network]' = None, collateral_return: 'Optional[TransactionOutput]' = None, total_collateral: 'Optional[int]' = None, reference_inputs: 'Optional[List[TransactionInput]]' = None)

Bases: pycardano.serialization.MapCBORSerializable

inputs: List[pycardano.transaction.TransactionInput]

outputs: List[pycardano.transaction.TransactionOutput]

fee: int = 0

ttl: Optional[int] = None

certificates: Optional[List[Union[pycardano.certificate.StakeRegistration, pycardano.certificate.StakeDeregistration, pycardano.certificate.StakeDelegation]]] = None

withdraws: Optional[pycardano.transaction.Withdrawals] = None

update: Any = None

auxiliary_data_hash: Optional[pycardano.hash.AuxiliaryDataHash] = None

validity_start: Optional[int] = None

mint: Optional[pycardano.transaction.MultiAsset] = None

script_data_hash: Optional[pycardano.hash.ScriptDataHash] = None

collateral: Optional[List[pycardano.transaction.TransactionInput]] = None

required_signers: Optional[List[pycardano.hash.VerificationKeyHash]] = None

network_id: Optional[pycardano.network.Network] = None

collateral_return: Optional[pycardano.transaction.TransactionOutput] = None

total_collateral: Optional[int] = None

reference_inputs: Optional[List[pycardano.transaction.TransactionInput]] = None

hash() → bytes

property id: pycardano.hash.TransactionId

class pycardano.transaction.Transaction(transaction_body: 'TransactionBody', transaction_witness_set: 'TransactionWitnessSet', valid: 'bool' = True, auxiliary_data: 'Optional[AuxiliaryData]' = None)

Bases: pycardano.serialization.ArrayCBORSerializable

transaction_body: pycardano.transaction.TransactionBody

transaction_witness_set: pycardano.witness.TransactionWitnessSet

valid: bool = True

auxiliary_data: Optional[pycardano.metadata.AuxiliaryData] = None

property id: pycardano.hash.TransactionId

class pycardano.transaction.Withdrawals(*args, **kwargs)

Bases: pycardano.serialization.DictCBORSerializable

A disctionary of reward addresses to reward withdrawal amount.

Key is address bytes, value is an integer.

Examples

>>> address = Address.from_primitive("stake_test1upyz3gk6mw5he20apnwfn96cn9rscgvmmsxc9r86dh0k66gswf59n")
>>> Withdrawals({bytes(address): 1000000}) 
{b'\xe0H(\xa2\xda\xdb\xa9|\xa9\xfd\x0c\xdc\x99\x97X\x99G\x0c!\x9b\xdc\r\x82\x8c\xfam\xdfmi':
1000000}

KEY_TYPE: alias of bytes

VALUE_TYPE: alias of int

class pycardano.txbuilder.TransactionBuilder(context: pycardano.backend.base.ChainContext, utxo_selectors: List[pycardano.coinselection.UTxOSelector] = <factory>, execution_memory_buffer: float = 0.2, execution_step_buffer: float = 0.2, ttl: Optional[int] = None, validity_start: Optional[int] = None, auxiliary_data: Optional[pycardano.metadata.AuxiliaryData] = None, native_scripts: Optional[List[pycardano.nativescript.NativeScript]] = None, mint: Optional[pycardano.transaction.MultiAsset] = None, required_signers: Optional[List[pycardano.hash.VerificationKeyHash]] = None, collaterals: List[pycardano.transaction.UTxO] = <factory>, certificates: Optional[List[Union[pycardano.certificate.StakeRegistration, pycardano.certificate.StakeDeregistration, pycardano.certificate.StakeDelegation]]] = None, withdrawals: Optional[pycardano.transaction.Withdrawals] = None)

Bases: object

A class builder that makes it easy to build a transaction.

context: pycardano.backend.base.ChainContext

utxo_selectors: List[pycardano.coinselection.UTxOSelector]

execution_memory_buffer: float = 0.2: Additional amount of execution memory (in ratio) that will be on top of estimation

execution_step_buffer: float = 0.2: Additional amount of execution step (in ratio) that will be added on top of estimation

ttl: Optional[int] = None

validity_start: Optional[int] = None

auxiliary_data: Optional[pycardano.metadata.AuxiliaryData] = None

native_scripts: Optional[List[pycardano.nativescript.NativeScript]] = None

mint: Optional[pycardano.transaction.MultiAsset] = None

required_signers: Optional[List[pycardano.hash.VerificationKeyHash]] = None

collaterals: List[pycardano.transaction.UTxO]

certificates: Optional[List[Union[pycardano.certificate.StakeRegistration, pycardano.certificate.StakeDeregistration, pycardano.certificate.StakeDelegation]]] = None

withdrawals: Optional[pycardano.transaction.Withdrawals] = None

reference_inputs: Set[pycardano.transaction.TransactionInput]

add_input(utxo: pycardano.transaction.UTxO) → pycardano.txbuilder.TransactionBuilder

Add a specific UTxO to transaction’s inputs.

Parameters: utxo (UTxO) – UTxO to be added.
Returns: Current transaction builder.
Return type: TransactionBuilder

add_script_input(utxo: pycardano.transaction.UTxO, script: Optional[Union[pycardano.transaction.UTxO, pycardano.nativescript.NativeScript, pycardano.plutus.PlutusV1Script, pycardano.plutus.PlutusV2Script]] = None, datum: Optional[Union[pycardano.plutus.PlutusData, dict, pycardano.serialization.IndefiniteList, int, bytes, pycardano.serialization.RawCBOR, pycardano.plutus.RawPlutusData]] = None, redeemer: Optional[pycardano.plutus.Redeemer] = None) → pycardano.txbuilder.TransactionBuilder

Add a script UTxO to transaction’s inputs.

Parameters

utxo (UTxO) – Script UTxO to be added.
script (Optional[Union[UTxO, NativeScript, PlutusV1Script, PlutusV2Script]]) – A plutus script. If not provided, the script will be inferred from the input UTxO (first arg of this method). The script can also be a specific UTxO whose output contains an inline script.
datum (Optional[Datum]) – A plutus datum to unlock the UTxO.
redeemer (Optional[Redeemer]) – A plutus redeemer to unlock the UTxO.

Returns

Current transaction builder.

Return type

TransactionBuilder

add_minting_script(script: Union[pycardano.transaction.UTxO, pycardano.nativescript.NativeScript, pycardano.plutus.PlutusV1Script, pycardano.plutus.PlutusV2Script], redeemer: Optional[pycardano.plutus.Redeemer] = None) → pycardano.txbuilder.TransactionBuilder

Add a minting script along with its datum and redeemer to this transaction.

Parameters

script (Union[UTxO, PlutusV1Script, PlutusV2Script]) – A plutus script.
redeemer (Optional[Redeemer]) – A plutus redeemer to unlock the UTxO.

Returns

Current transaction builder.

Return type

TransactionBuilder

add_input_address(address: Union[pycardano.address.Address, str]) → pycardano.txbuilder.TransactionBuilder

Add an address to transaction’s input address. Unlike add_input(), which deterministically adds a UTxO to the transaction’s inputs, add_input_address will not immediately select any UTxO when called. Instead, it will delegate UTxO selection to UTxOSelector`s of the builder when :meth:`build is called.

Parameters: address (Union[Address, str]) – Address to be added.
Returns: The current transaction builder.
Return type: TransactionBuilder

add_output(tx_out: pycardano.transaction.TransactionOutput, datum: Optional[Union[pycardano.plutus.PlutusData, dict, pycardano.serialization.IndefiniteList, int, bytes, pycardano.serialization.RawCBOR, pycardano.plutus.RawPlutusData]] = None, add_datum_to_witness: bool = False) → pycardano.txbuilder.TransactionBuilder

Add a transaction output.

Parameters

tx_out (TransactionOutput) – The transaction output to be added.
datum (Datum) – Attach a datum hash to this transaction output.
add_datum_to_witness (bool) – Optionally add the actual datum to transaction witness set. Defaults to False.

Returns

Current transaction builder.

Return type

TransactionBuilder

property inputs: List[pycardano.transaction.UTxO]

property excluded_inputs: List[pycardano.transaction.UTxO]

property input_addresses: List[Union[pycardano.address.Address, str]]

property outputs: List[pycardano.transaction.TransactionOutput]

property fee: int

property all_scripts: List[Union[bytes, pycardano.nativescript.NativeScript, pycardano.plutus.PlutusV1Script, pycardano.plutus.PlutusV2Script]]

property scripts: List[Union[bytes, pycardano.nativescript.NativeScript, pycardano.plutus.PlutusV1Script, pycardano.plutus.PlutusV2Script]]

property datums: Dict[pycardano.hash.DatumHash, Union[pycardano.plutus.PlutusData, dict, pycardano.serialization.IndefiniteList, int, bytes, pycardano.serialization.RawCBOR, pycardano.plutus.RawPlutusData]]

property redeemers: List[pycardano.plutus.Redeemer]

property script_data_hash: Optional[pycardano.hash.ScriptDataHash]

build_witness_set() → pycardano.witness.TransactionWitnessSet

Build a transaction witness set, excluding verification key witnesses. This function is especially useful when the transaction involves Plutus scripts.

Returns: A transaction witness set without verification key witnesses.
Return type: TransactionWitnessSet

build(change_address: Optional[pycardano.address.Address] = None, merge_change: Optional[bool] = False, collateral_change_address: Optional[pycardano.address.Address] = None) → pycardano.transaction.TransactionBody

Build a transaction body from all constraints set through the builder.

Parameters

change_address (Optional[Address]) – Address to which changes will be returned. If not provided, the transaction body will likely be unbalanced (sum of inputs is greater than the sum of outputs).
merge_change (Optional[bool]) – If the change address match one of the transaction output, the change amount will be directly added to that transaction output, instead of being added as a separate output.
collateral_change_address (Optional[Address]) – Address to which collateral changes will be returned.

Returns

A transaction body.

Return type

TransactionBody

build_and_sign(signing_keys: List[Union[pycardano.key.SigningKey, pycardano.key.ExtendedSigningKey]], change_address: Optional[pycardano.address.Address] = None, merge_change: Optional[bool] = False, collateral_change_address: Optional[pycardano.address.Address] = None) → pycardano.transaction.Transaction

Build a transaction body from all constraints set through the builder and sign the transaction with provided signing keys.

Parameters

signing_keys (List[Union[SigningKey, ExtendedSigningKey]]) – A list of signing keys that will be used to sign the transaction.
change_address (Optional[Address]) – Address to which changes will be returned. If not provided, the transaction body will likely be unbalanced (sum of inputs is greater than the sum of outputs).
merge_change (Optional[bool]) – If the change address match one of the transaction output, the change amount will be directly added to that transaction output, instead of being added as a separate output.
collateral_change_address (Optional[Address]) – Address to which collateral changes will be returned.

Returns

A signed transaction.

Return type

Transaction