Genesis

The genesis.json file defines the initial state of the Cronos POS Chain. On top of the standard tendermint genesis format, we customize our own genesis file that includes different modules and facilitates the special features of the Cronos POS Chain. Sample genesis file can be found here.

Fields in genesis

Specifically, the genesis file includes the following fields:

• "genesis_time": The time of the beginning of the blockchain.

• "genutil": A variety of genesis utility functionality for usage including genesis transactions creation (gentx) and genesis file validation command as well as Tendermint related initialization.

• "ibc": Inter-Blockchain Communication across different chains.

• "chain_id": A unique identifier for the blockchain. See this for further details.

• "initial_height": The initial height of the blockchain.

• "consensus_params: Consensus parameters defined in the genesis file.

  • "block":

    • "max_bytes": Maximum size of a block (in bytes).

    • "max_gas": The gas limit per block, default value is "-1", i.e., no rules about gas are enforced.

    • "time_iota_ms": The minimum time increment between consecutive blocks, in milliseconds.

  • "evidence": Evidence storage handling and block proposal detection with the evidence reactor.

    • "max_age_num_blocks": This field is to be deprecated.

    • "max_age_duration": The maximum age of evidence. Any evidence older than this will be rejected.

    • "max_num": The maximum age of evidence (in number of blocks).

  • "validator":

    • "pub_key_types": The supported validator public key types.

• "app_hash": The initial application state defined in the genesis block.

• "auth"

  • "params": Parameters of the auth module defined in the genesis file.

    • "max_memo_characters": Maximum number of characters in a memo of a transaction.

    • "tx_sig_limit": The maximum number of signers for a transaction.

    • "tx_size_cost_per_byte": The amount of gas consumed per byte of a transaction.

    • "sig_verify_cost_ed25519": Gas cost on edd2519 signature verification.

    • "sig_verify_cost_secp256k1": Gas cost on secp256k1 signature verification.

  • "accounts": Genesis accounts, which defines the initial allocation of the tokens.

    • "@type": Account type.

    • "address": Address of the genesis accounts.

    • "pub_key": Public key of the genesis accounts.

    • "account_number": The account number of the account in state.

    • "sequence": Used to count the number of transactions sent by this account. It is incremented each time a transaction is included in a block, and used to prevent replay attacks.

    • "base_vesting_account":

      • "original_vesting": Special type of accounting that the token needs to be vested for a period of time before they can be transferred. Tokens can be delegated during the vesting period.

        • "denom": Denomination of the token.

        • "amount": Total amount in the vesting account.

        • "delegated_free": Amount of delegated tokens that can be transferred after they've been vested.

        • "delegated_vesting": Amount of delegated tokens that are still under vesting.

        • "endtime": Vesting end time.

• "bank" The bank module handles tokens.

  • "params": Parameters of the bank module defined in the genesis file.

    • "send_enabled": The transfer capability in the genesis.

    • "default_send_enabled": The default value for "send_enabled" value controls send transfer capability.

• "distribution":The module that handles the logic of distribution block provisions and fees to validators and delegators.

  • "delegator_starting_infos":

  • "delegator_withdraw_infos": List of delegators withdraw address.

  • "fee_pool":

    • "community_pool": Allocated funds in the community pool, if any.

  • "outstanding_rewards": Uncollected rewards, if any.

  • "params": Parameters of the distribution module defined in the genesis file.

    • "base_proposer_reward": Base bonus on transaction fees collected in a valid block.

    • "bonus_proposer_reward": Maximum bonus on transaction fees collected in a valid block.

    • "community_tax": The rate of community tax.

    • "withdraw_addr_enabled": Whether delegators can set a different address to withdraw their rewards.

  • "previous_proposer": Proposer of the previous block, if any.

  • "validator_accumulated_commissions": Uncollected commission of validators, if any.

  • "validator_current_rewards": Information related to the current rewards of validators, if any.

  • "validator_historical_rewards": Information related to the historical rewards of validators, if any.

  • "validator_slash_events": Information related to the historical slashing events of validators, if any.

• "gov": The governance module.

  • "deposit_params": Parameters for the deposit required for governance proposal.

    • "max_deposit_period": The maximum deposit period for governance proposal.

    • "min_deposit": The minimum deposit required for governance proposal.

  • "deposits": List of deposits for each proposal ID, if any.

  • "proposals": List of proposals for proposals, if any.

  • "starting_proposal_id": The initial proposals id, starting from "1"

  • "tally_params": Parameters for tally.

    • "quorum": Minimum percentage of bonded staking tokens that needs to vote for the result to be valid.

    • "threshold": Minimum percentage of votes that need to be YES for the result to be valid.

    • "veto_threshold": Maximum percentage NO_WITH_VETO votes for the result to be valid.

  • "votes": List of votes for each proposal ID, if any.

  • "voting_params": Parameters for voting.

    • "voting_period": The voting period for governance proposal.

• "mint": The minting module for token minting.

  • "minter":

    • "annual_provisions": Annual expected provisions (set to zero in genesis).

    • "inflation": The target yearly inflation rate, compounded weekly.

  • "params": Parameters of the mint module defined in the genesis file.

    • "blocks_per_year": The expected number of blocks being produced per year.

    • "goal_bonded": Target bonded token in percentage.

    • "inflation_max": Maximum inflation rate.

    • "inflation_min": Minimum inflation rate.

    • "inflation_rate_change": Maximum annual change in inflation rate.

    • "mint_denom": Token type being minted.

• "slashing": The slashing module for the punishment of validator's misbehavior.

  • "missed_blocks": Information related to validators missed blocks, if any.

  • "params": Parameters of the slashing module defined in the genesis file.

    • "downtime_jail_duration": The jailing duration for validators with low availability.

    • "min_signed_per_window": Threshold of total missed blocks, in percentage.

    • "signed_blocks_window": Window to calculate validators's liveness.

    • "slash_fraction_double_sign": Maximum percentage of stake reduction for byzantine validators.

    • "slash_fraction_downtime": Maximum percentage of stake reduction for validators with low availability.

  • "signing_infos": Information related to each validator for the slashing module, if any.

• "staking": The staking module that handles Proof-of-Stake related logics.

  • "delegations": Information related to the delegation state of validators, if any.

  • "exported": Wether this genesis file was generated by exporting of a previous state.

  • "last_total_power": Total voting power in the genesis, if any.

  • "last_validator_powers": The voting power of each validator in last known state, if any.

  • "params": Parameters of the staking module defined in the genesis file.

    • "bond_denom": Coin denomination for staking.

    • "historical_entries": The number of historical entries to persist.

    • "max_entries": The max entries for either unbonding delegation or redelegation.

    • "max_validators": The maximum number of validator.

    • "unbonding_time": The time duration of unbonding.

  • "redelegations": List of redelegations for validators, if any.

  • "unbonding_delegations": List of unbonding delegations for validators, if any.

  • "validators": List of existing validators, if any.