constants.rs

use crate::B160;

/// Interpreter stack limit
pub const STACK_LIMIT: u64 = 1024;
/// EVM call stack limit
pub const CALL_STACK_LIMIT: u64 = 1024;

/// EIP-170: Contract code size limit
/// By default limit is 0x6000 (~25kb)
pub const MAX_CODE_SIZE: usize = 0x6000;

/// Number of blocks hashes that EVM can access in the past
pub const BLOCK_HASH_HISTORY: usize = 256;

/// EIP-3860: Limit and meter initcode
///
/// Limit of maximum initcode size is 2 * MAX_CODE_SIZE
pub const MAX_INITCODE_SIZE: usize = 2 * MAX_CODE_SIZE;

/// Precompile 3 is special in few places
pub const PRECOMPILE3: B160 = B160([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3]);

// EIP-4844 constants
/// Gas consumption of a single data blob (== blob byte size).
pub const GAS_PER_BLOB: u64 = 1 << 17;
/// Target number of the blob per block.
pub const TARGET_BLOB_NUMBER_PER_BLOCK: u64 = 3;
/// Max number of blobs per block
pub const MAX_BLOB_NUMBER_PER_BLOCK: u64 = 2 * TARGET_BLOB_NUMBER_PER_BLOCK;
/// Maximum consumable blob gas for data blobs per block.
pub const MAX_BLOB_GAS_PER_BLOCK: u64 = MAX_BLOB_NUMBER_PER_BLOCK * GAS_PER_BLOB;
/// Target consumable blob gas for data blobs per block (for 1559-like pricing).
pub const TARGET_BLOB_GAS_PER_BLOCK: u64 = TARGET_BLOB_NUMBER_PER_BLOCK * GAS_PER_BLOB;
/// Minimum gas price for data blobs.
pub const MIN_BLOB_GASPRICE: u64 = 1;
/// Controls the maximum rate of change for blob gas price.
pub const BLOB_GASPRICE_UPDATE_FRACTION: u64 = 3338477;
/// First version of the blob.
pub const VERSIONED_HASH_VERSION_KZG: u8 = 0x01;