Configurability

Table of Contents

Overview

The SystemConfig is updated.

SystemConfig

ConfigUpdate

The following ConfigUpdate event is defined where the CONFIG_VERSION is uint256(0):

NameValueDefinitionUsage
BATCHERuint8(0)abi.encode(address)Modifies the account that is authorized to progress the safe chain
FEE_SCALARSuint8(1)(uint256(0x01) << 248) | (uint256(_blobbasefeeScalar) << 32) | _basefeeScalarModifies the fee scalars
GAS_LIMITuint8(2)abi.encode(uint64 _gasLimit)Modifies the L2 gas limit
UNSAFE_BLOCK_SIGNERuint8(3)abi.encode(address)Modifies the account that is authorized to progress the unsafe chain
EIP_1559_PARAMSuint8(4)uint256(uint64(uint32(_denominator))) << 32 | uint64(uint32(_elasticity))Modifies the EIP-1559 denominator and elasticity
OPERATOR_FEE_PARAMSuint8(5)uint256(_operatorFeeScalar) << 64 | _operatorFeeConstantModifies the operator fee scalar and constant

Initialization

The following actions should happen during the initialization of the SystemConfig:

  • emit ConfigUpdate.BATCHER
  • emit ConfigUpdate.FEE_SCALARS
  • emit ConfigUpdate.GAS_LIMIT
  • emit ConfigUpdate.UNSAFE_BLOCK_SIGNER
  • emit ConfigUpdate.EIP_1559_PARAMS

These actions MAY only be triggered if there is a diff to the value.

The operatorFeeScalar and operatorFeeConstant are initialized to 0.

Modifying Operator Fee Parameters

A new SystemConfig UpdateType is introduced that enables the modification of the operatorFeeScalar and operatorFeeConstant by the SystemConfig owner.

Interface

Operator fee parameters

operatorFeeScalar

This function returns the currently configured operator fee scalar.

function operatorFeeScalar()(uint32)
operatorFeeConstant

This function returns the currently configured operator fee constant.

function operatorFeeConstant()(uint64)
setOperatorFeeScalars

This function sets the operatorFeeScalar and operatorFeeConstant.

This function MUST only be callable by the SystemConfig owner.

function setOperatorFeeScalar(uint32 _operatorFeeScalar, uint64 _operatorFeeConstant)