Struct GasParams 

pub struct GasParams { /* private fields */ }

Gas table for dynamic gas constants.

Implementations

impl GasParams

pub fn new(table: Arc<[u64; 256]>) -> Self

Creates a new GasParams with the given table.

pub fn override_gas(&mut self, values: impl IntoIterator<Item = (GasId, u64)>)

Overrides the gas cost for the given gas id.

It will clone underlying table and override the values.

Use to override default gas cost

use revm_context_interface::cfg::gas_params::{GasParams, GasId};
use primitives::hardfork::SpecId;

let mut gas_table = GasParams::new_spec(SpecId::default());
gas_table.override_gas([(GasId::memory_linear_cost(), 2), (GasId::memory_quadratic_reduction(), 512)].into_iter());
assert_eq!(gas_table.get(GasId::memory_linear_cost()), 2);
assert_eq!(gas_table.get(GasId::memory_quadratic_reduction()), 512);

pub fn table(&self) -> &[u64; 256]

Returns the table.

pub fn new_spec(spec: SpecId) -> Self

Creates a new GasParams for the given spec.

pub const fn get(&self, id: GasId) -> u64

Gets the gas cost for the given gas id.

pub fn exp_cost(&self, power: U256) -> u64

EXP opcode cost calculation.

pub fn selfdestruct_refund(&self) -> i64

Selfdestruct refund.

pub fn selfdestruct_cold_cost(&self) -> u64

Selfdestruct cold cost is calculated differently from other cold costs. and it contains both cold and warm costs.

pub fn selfdestruct_cost(&self, should_charge_topup: bool, is_cold: bool) -> u64

Selfdestruct cost.

pub fn extcodecopy(&self, len: usize) -> u64

EXTCODECOPY gas cost

pub fn mcopy_cost(&self, len: usize) -> u64

MCOPY gas cost

pub fn sstore_static_gas(&self) -> u64

Static gas cost for SSTORE opcode

pub fn sstore_set_without_load_cost(&self) -> u64

SSTORE set cost

pub fn sstore_reset_without_cold_load_cost(&self) -> u64

SSTORE reset cost

pub fn sstore_clearing_slot_refund(&self) -> u64

SSTORE clearing slot refund

pub fn sstore_dynamic_gas( &self, is_istanbul: bool, vals: &SStoreResult, is_cold: bool, ) -> u64

Dynamic gas cost for SSTORE opcode.

Dynamic gas cost is gas that needs input from SSTORE operation to be calculated.

pub fn sstore_refund(&self, is_istanbul: bool, vals: &SStoreResult) -> i64

SSTORE refund calculation.

pub const fn log_cost(&self, n: u8, len: u64) -> u64

LOG opcode cost calculation.

pub fn keccak256_cost(&self, len: usize) -> u64

KECCAK256 gas cost per word

pub fn memory_cost(&self, len: usize) -> u64

Memory gas cost

pub fn initcode_cost(&self, len: usize) -> u64

Initcode word cost

pub fn create_cost(&self) -> u64

Create gas cost

pub fn create2_cost(&self, len: usize) -> u64

Create2 gas cost.

pub fn call_stipend(&self) -> u64

Call stipend.

pub fn call_stipend_reduction(&self, gas_limit: u64) -> u64

Call stipend reduction. Call stipend is reduced by 1/64 of the gas limit.

pub fn transfer_value_cost(&self) -> u64

Transfer value cost

pub fn cold_account_additional_cost(&self) -> u64

Additional cold cost. Additional cold cost is added to the gas cost if the account is cold loaded.

pub fn cold_storage_additional_cost(&self) -> u64

Cold storage additional cost.

pub fn cold_storage_cost(&self) -> u64

Cold storage cost.

pub fn new_account_cost( &self, is_spurious_dragon: bool, transfers_value: bool, ) -> u64

New account cost. New account cost is added to the gas cost if the account is empty.

pub fn new_account_cost_for_selfdestruct(&self) -> u64

New account cost for selfdestruct.

pub fn warm_storage_read_cost(&self) -> u64

Warm storage read cost. Warm storage read cost is added to the gas cost if the account is warm loaded.

pub fn copy_cost(&self, len: usize) -> u64

Copy cost

pub fn copy_per_word_cost(&self, word_num: usize) -> u64

Copy per word cost

pub fn code_deposit_cost(&self, len: usize) -> u64

Code deposit cost, calculated per byte as len * code_deposit_cost.

pub fn tx_eip7702_per_empty_account_cost(&self) -> u64

Used in GasParams::initial_tx_gas to calculate the eip7702 per empty account cost.

pub fn tx_token_non_zero_byte_multiplier(&self) -> u64

Used in GasParams::initial_tx_gas to calculate the token non zero byte multiplier.

pub fn tx_token_cost(&self) -> u64

Used in GasParams::initial_tx_gas to calculate the token cost for input data.

pub fn tx_floor_cost_per_token(&self) -> u64

Used in GasParams::initial_tx_gas to calculate the floor gas per token.

pub fn tx_floor_cost(&self, tokens_in_calldata: u64) -> u64

Used GasParams::initial_tx_gas to calculate the floor gas.

Floor gas is introduced in EIP-7623.

pub fn tx_floor_cost_base_gas(&self) -> u64

Used in GasParams::initial_tx_gas to calculate the floor gas base gas.

pub fn tx_access_list_address_cost(&self) -> u64

Used in GasParams::initial_tx_gas to calculate the access list address cost.

pub fn tx_access_list_storage_key_cost(&self) -> u64

Used in GasParams::initial_tx_gas to calculate the access list storage key cost.

pub fn tx_base_stipend(&self) -> u64

Used in GasParams::initial_tx_gas to calculate the base transaction stipend.

pub fn tx_create_cost(&self) -> u64

Used in GasParams::initial_tx_gas to calculate the create cost.

Similar to the Self::create_cost method but it got activated in different fork,

pub fn tx_initcode_cost(&self, len: usize) -> u64

Used in GasParams::initial_tx_gas to calculate the initcode cost per word of len.

pub fn initial_tx_gas( &self, input: &[u8], is_create: bool, access_list_accounts: u64, access_list_storages: u64, authorization_list_num: u64, ) -> InitialAndFloorGas

Initial gas that is deducted for transaction to be included. Initial gas contains initial stipend gas, gas for access list and input data.

Returns

• Intrinsic gas
• Number of tokens in calldata

Trait Implementations

impl Clone for GasParams

fn clone(&self) -> GasParams

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GasParams

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for GasParams

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for GasParams

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for GasParams

fn hash<H: Hasher>(&self, hasher: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for GasParams

fn eq(&self, other: &GasParams) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for GasParams

Available on crate feature serde only.

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for GasParams

impl Send for GasParams

Pointer points to Arc so it is safe to send across threads

impl Sync for GasParams

Pointer points to Arc so it is safe to access