ProtocolParameters

class cometa.protocol_params.protocol_parameters.ProtocolParameters(ptr)[source]

Bases: object

Protocol parameters that govern the Cardano network.

Protocol parameters define various aspects of the network including transaction fees, block sizes, staking parameters, and governance thresholds.

__init__(ptr)[source]

Return type:: None

__enter__()[source]

Return type:: ProtocolParameters

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

Return type:: None

__repr__()[source]

Return repr(self).

Return type:: str

classmethod new()[source]

Creates a new empty ProtocolParameters instance.

Returns:: A new ProtocolParameters instance.
Raises:: CardanoError – If creation fails.
Return type:: ProtocolParameters

property min_fee_a: int

Linear fee coefficient (a) for transaction fees.

The minimum fee is calculated as: min_fee = a * tx_size + b

property min_fee_b: int

Constant fee coefficient (b) for transaction fees.

The minimum fee is calculated as: min_fee = a * tx_size + b

property max_block_body_size: int: Maximum block body size in bytes.

property max_tx_size: int: Maximum transaction size in bytes.

property max_block_header_size: int: Maximum block header size in bytes.

property key_deposit: int: Staking key registration deposit in lovelaces.

property pool_deposit: int: Stake pool registration deposit in lovelaces.

property max_epoch: int: Maximum pool retirement epoch bounds.

property n_opt: int: Desired number of stake pools (k parameter).

property pool_pledge_influence: UnitInterval | None: Pool pledge influence factor (a0).

property expansion_rate: UnitInterval | None: Monetary expansion rate (rho).

property treasury_growth_rate: UnitInterval | None: Treasury growth rate (tau).

property d: UnitInterval | None: Decentralization parameter (deprecated in Babbage).

property extra_entropy: Buffer | None: Extra entropy for leader selection (deprecated).

property protocol_version: ProtocolVersion | None: Current protocol version.

property min_pool_cost: int: Minimum pool cost in lovelaces.

property ada_per_utxo_byte: int: Lovelaces per UTXO byte (coins per UTxO word).

property cost_models: Costmdls | None: Cost models for Plutus script execution.

property execution_costs: ExUnitPrices | None: Execution unit prices for Plutus scripts.

property max_tx_ex_units: ExUnits | None: Maximum execution units per transaction.

property max_block_ex_units: ExUnits | None: Maximum execution units per block.

property max_value_size: int: Maximum value size in bytes.

property collateral_percentage: int: Collateral percentage required for Plutus scripts.

property max_collateral_inputs: int: Maximum number of collateral inputs.

property pool_voting_thresholds: PoolVotingThresholds | None: Voting thresholds for stake pool operators.

property drep_voting_thresholds: DRepVotingThresholds | None: Voting thresholds for DReps.

property min_committee_size: int: Minimum constitutional committee size.

property committee_term_limit: int: Committee member term limit in epochs.

property governance_action_validity_period: int: Governance action validity period in epochs.

property governance_action_deposit: int: Governance action deposit in lovelaces.

property drep_deposit: int: DRep registration deposit in lovelaces.

property drep_inactivity_period: int: DRep inactivity period in epochs.

property ref_script_cost_per_byte: UnitInterval | None: Reference script cost per byte.