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Protocol parameters

GET /epochs/:number/parameters

Return the protocol parameters for the epoch specified.

Request​

Path Parameters

    number integer required

    Number of the epoch

    Example: 225
Responses

Return the data about the epoch

Schema
    epoch integer required

    Epoch number

    min_fee_a integer required

    The linear factor for the minimum fee calculation for given epoch

    min_fee_b integer required

    The constant factor for the minimum fee calculation

    max_block_size integer required

    Maximum block body size in Bytes

    max_tx_size integer required

    Maximum transaction size

    max_block_header_size integer required

    Maximum block header size

    key_deposit string required

    The amount of a key registration deposit in Lovelaces

    pool_deposit string required

    The amount of a pool registration deposit in Lovelaces

    e_max integer required

    Epoch bound on pool retirement

    n_opt integer required

    Desired number of pools

    a0 number required

    Pool pledge influence

    rho number required

    Monetary expansion

    tau number required

    Treasury expansion

    decentralisation_param number required

    Percentage of blocks produced by federated nodes

    extra_entropy string nullable required

    Seed for extra entropy

    protocol_major_ver integer required

    Accepted protocol major version

    protocol_minor_ver integer required

    Accepted protocol minor version

    min_utxo string deprecated

    Minimum UTXO value. Use coins_per_utxo_size for Alonzo and later eras

    min_pool_cost string required

    Minimum stake cost forced on the pool

    nonce string required

    Epoch number only used once

    cost_models objectnullablerequired

    Cost models parameters for Plutus Core scripts

    property name* any nullable

    Cost models parameters for Plutus Core scripts

    price_mem number nullable required

    The per word cost of script memory usage

    price_step number nullable required

    The cost of script execution step usage

    max_tx_ex_mem string nullable required

    The maximum number of execution memory allowed to be used in a single transaction

    max_tx_ex_steps string nullable required

    The maximum number of execution steps allowed to be used in a single transaction

    max_block_ex_mem string nullable required

    The maximum number of execution memory allowed to be used in a single block

    max_block_ex_steps string nullable required

    The maximum number of execution steps allowed to be used in a single block

    max_val_size string nullable required

    The maximum Val size

    collateral_percent integer nullable required

    The percentage of the transactions fee which must be provided as collateral when including non-native scripts

    max_collateral_inputs integer nullable required

    The maximum number of collateral inputs allowed in a transaction

    coins_per_utxo_size string nullable required

    Cost per UTxO word for Alonzo. Cost per UTxO byte for Babbage and later.

    coins_per_utxo_word string nullable deprecated

    Cost per UTxO word for Alonzo. Cost per UTxO byte for Babbage and later.

    pvt_motion_no_confidence number nullable required

    Pool Voting threshold for motion of no-confidence.

    pvt_committee_normal number nullable required

    Pool Voting threshold for new committee/threshold (normal state).

    pvt_committee_no_confidence number nullable required

    Pool Voting threshold for new committee/threshold (state of no-confidence).

    pvt_hard_fork_initiation number nullable required

    Pool Voting threshold for hard-fork initiation.

    dvt_motion_no_confidence number nullable required

    DRep Vote threshold for motion of no-confidence.

    dvt_committee_normal number nullable required

    DRep Vote threshold for new committee/threshold (normal state).

    dvt_committee_no_confidence number nullable required

    DRep Vote threshold for new committee/threshold (state of no-confidence).

    dvt_update_to_constitution number nullable required

    DRep Vote threshold for update to the Constitution.

    dvt_hard_fork_initiation number nullable required

    DRep Vote threshold for hard-fork initiation.

    dvt_p_p_network_group number nullable required

    DRep Vote threshold for protocol parameter changes, network group.

    dvt_p_p_economic_group number nullable required

    DRep Vote threshold for protocol parameter changes, economic group.

    dvt_p_p_technical_group number nullable required

    DRep Vote threshold for protocol parameter changes, technical group.

    dvt_p_p_gov_group number nullable required

    DRep Vote threshold for protocol parameter changes, governance group.

    dvt_treasury_withdrawal number nullable required

    DRep Vote threshold for treasury withdrawal.

    committee_min_size string nullable required

    Minimal constitutional committee size.

    committee_max_term_length string nullable required

    Constitutional committee term limits.

    gov_action_lifetime string nullable required

    Governance action expiration.

    gov_action_deposit string nullable required

    Governance action deposit.

    drep_deposit string nullable required

    DRep deposit amount.

    drep_activity string nullable required

    DRep activity period.

    pvtpp_security_group number nullable required
    min_fee_ref_script_cost_per_byte number nullable required
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