Fee

The x/fee module in Sunrise serves as a critical component for managing transaction fees on the network, including burning a portion of the $RISE tokens used as fees. This module ensures sustainable tokenomics while maintaining an efficient fee system.

Key Features of x/fee

Burn Mechanism: A portion of $RISE tokens used as transaction fees is burned, effectively reducing the circulating supply of the token. The amount burned is determined by the burn_ratio parameter, which specifies the percentage of each fee to be permanently removed from circulation.

Fee Denomination (fee_denom): The module enforces a specific denomination for transaction fees, defined in the parameter fee_denom. Only transactions paying fees in the specified denomination are accepted.

Bypass Denominations (bypass_denoms): Certain denominations can bypass the standard fee denomination restrictions, allowing additional flexibility for specialized use cases.

Sunrise Configured Parameters: The default burn_ratio is set to 0.5, meaning 50% of the transaction fees are burned.

• The default fee_denom is "urise".

• The default bypass denomination is "uvrise".

Parameter Configuration

The x/fee module parameters can be configured dynamically, with validation enforced by the module:

Fee Denomination (fee_denom):

• Must be a valid, non-empty string.

• Default: "urise".

Burn Ratio (burn_ratio):

• Specifies the percentage of transaction fees to burn.

• Must be a non-negative value less than 1.

• Default: 0.5 (50% of fees are burned).

Bypass Denominations (bypass_denoms):

• List of denominations that bypass the standard fee denomination rule.

• Each denomination must be a valid, non-empty string.

• Default: ["uvrise"].

Core Functionality

Fee Deduction and Burning:

• When a transaction is processed, fees are deducted from the sender's account and a portion is sent to the fee collector module account.

• The other portion is burnt, which reduces the supply of $RISE tokens.

  func DeductFees(bankKeeper BankKeeper, ctx sdk.Context, acc sdk.AccountI, fees sdk.Coins, feeKeeper feekeeper.Keeper) error {
  ...
  if err := feeKeeper.Burn(ctx, fees); err != nil {
  return err
  }
  ...
  }

Benefits of the Fee Module

• Deflationary Pressure: The burning mechanism introduces deflationary pressure on $RISE tokens, supporting long-term token value.

• Fee Flexibility: Configurable parameters like bypass_denoms provide flexibility for specialized transaction scenarios.

For more details and implementation specifics, see the GitHub repository.