github.com/Finschia/finschia-sdk@v0.49.1/x/auth/spec/01_concepts.md (about)

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     5  # Concepts
     6  
     7  **Note:** The auth module is different from the [authz module](../modules/authz/).
     8  
     9  The differences are:
    10  
    11  * `auth` - authentication of accounts and transactions for Cosmos SDK applications and is responsible for specifying the base transaction and account types.
    12  * `authz` - authorization for accounts to perform actions on behalf of other accounts and enables a granter to grant authorizations to a grantee that allows the grantee to execute messages on behalf of the granter.
    13  
    14  ## Gas & Fees
    15  
    16  Fees serve two purposes for an operator of the network.
    17  
    18  Fees limit the growth of the state stored by every full node and allow for
    19  general purpose censorship of transactions of little economic value. Fees
    20  are best suited as an anti-spam mechanism where validators are disinterested in
    21  the use of the network and identities of users.
    22  
    23  Fees are determined by the gas limits and gas prices transactions provide, where
    24  `fees = ceil(gasLimit * gasPrices)`. Txs incur gas costs for all state reads/writes,
    25  signature verification, as well as costs proportional to the tx size. Operators
    26  should set minimum gas prices when starting their nodes. They must set the unit
    27  costs of gas in each token denomination they wish to support:
    28  
    29  `simd start ... --minimum-gas-prices=0.00001stake;0.05photinos`
    30  
    31  When adding transactions to mempool or gossipping transactions, validators check
    32  if the transaction's gas prices, which are determined by the provided fees, meet
    33  any of the validator's minimum gas prices. In other words, a transaction must
    34  provide a fee of at least one denomination that matches a validator's minimum
    35  gas price.
    36  
    37  Tendermint does not currently provide fee based mempool prioritization, and fee
    38  based mempool filtering is local to node and not part of consensus. But with
    39  minimum gas prices set, such a mechanism could be implemented by node operators.
    40  
    41  Because the market value for tokens will fluctuate, validators are expected to
    42  dynamically adjust their minimum gas prices to a level that would encourage the
    43  use of the network.