Struct CfgEnv

Source

#[non_exhaustive]
pub struct CfgEnv<SPEC = SpecId> {Show 18 fields
    pub chain_id: u64,
    pub tx_chain_id_check: bool,
    pub spec: SPEC,
    pub limit_contract_code_size: Option<usize>,
    pub limit_contract_initcode_size: Option<usize>,
    pub disable_nonce_check: bool,
    pub max_blobs_per_tx: Option<u64>,
    pub blob_base_fee_update_fraction: Option<u64>,
    pub tx_gas_limit_cap: Option<u64>,
    pub memory_limit: u64,
    pub disable_balance_check: bool,
    pub disable_block_gas_limit: bool,
    pub disable_eip3541: bool,
    pub disable_eip3607: bool,
    pub disable_eip7623: bool,
    pub disable_base_fee: bool,
    pub disable_priority_fee_check: bool,
    pub disable_fee_charge: bool,
}

Expand description

EVM configuration

Fields (Non-exhaustive)§

This struct is marked as non-exhaustive

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

§chain_id: u64

Chain ID of the EVM. Used in CHAINID opcode and transaction’s chain ID check.

Chain ID is introduced EIP-155.

§tx_chain_id_check: bool

Whether to check the transaction’s chain ID.

If set to false, the transaction’s chain ID check will be skipped.

§spec: SPEC

Specification for EVM represent the hardfork

§limit_contract_code_size: Option<usize>

Contract code size limit override.

If None, the limit will be determined by the SpecId (EIP-170 or EIP-7907) at runtime. If Some, this specific limit will be used regardless of SpecId.

Useful to increase this because of tests.

§limit_contract_initcode_size: Option<usize>

Contract initcode size limit override.

If None, the limit will check if limit_contract_code_size is set. If it is set, it will double it for a limit. If it is not set, the limit will be determined by the SpecId (EIP-170 or EIP-7907) at runtime.

Useful to increase this because of tests.

§disable_nonce_check: bool

Skips the nonce validation against the account’s nonce

§max_blobs_per_tx: Option<u64>

Blob max count. EIP-7840 Add blob schedule to EL config files.

If this config is not set, the check for max blobs will be skipped.

§blob_base_fee_update_fraction: Option<u64>

Blob base fee update fraction. EIP-4844 Blob base fee update fraction.

If this config is not set, the blob base fee update fraction will be set to the default value. See also CfgEnv::blob_base_fee_update_fraction.

Default values for Cancun is primitives::eip4844::BLOB_BASE_FEE_UPDATE_FRACTION_CANCUN and for Prague is primitives::eip4844::BLOB_BASE_FEE_UPDATE_FRACTION_PRAGUE.

§tx_gas_limit_cap: Option<u64>

Configures the gas limit cap for the transaction.

If None, default value defined by spec will be used.

Introduced in Osaka in EIP-7825: Transaction Gas Limit Cap with initials cap of 30M.

§memory_limit: u64

A hard memory limit in bytes beyond which OutOfGasError::Memory cannot be resized.

In cases where the gas limit may be extraordinarily high, it is recommended to set this to a sane value to prevent memory allocation panics.

Defaults to 2^32 - 1 bytes per EIP-1985.

§disable_balance_check: bool

Skip balance checks if true

Adds transaction cost to balance to ensure execution doesn’t fail.