Struct evm_rs_emulator::Stack

pub struct Stack {
    pub stack: Vec<[u8; 32]>,
}

A stack data structure used in the Ethereum Virtual Machine (EVM) to store and manipulate data.

Fields

stack: Vec<[u8; 32]>

The stack itself

Implementations

impl Stack

Implements a stack data structure for the EVM emulator.

pub fn new() -> Self

Creates a new stack instance.

pub fn push(&mut self, word: [u8; 32]) -> Result<(), ExecutionError>

Pushes a 32-byte word onto the stack.

Arguments

• word - A 32-byte array representing the word to be pushed onto the stack.

Errors

Returns an ExecutionError if the stack is too deep (i.e., has more than 1024 elements).

pub fn pop(&mut self) -> Result<[u8; 32], ExecutionError>

Pop a word off the stack

Errors

Returns an ExecutionError if the stack is empty.

pub fn dup(&mut self, index: usize) -> Result<[u8; 32], ExecutionError>

Duplicate a word on the stack

Arguments

• index - The index of the word to duplicate, counting from the top of the stack

Errors

Returns an ExecutionError if the stack is too small to perform the operation

Returns

Returns the duplicated word if successful

pub fn swap(&mut self, index: usize) -> Result<[[u8; 32]; 2], ExecutionError>

Swaps the word at the top of the stack with the word at the specified index.

Arguments

• index - The index of the word to swap with the top of the stack.

Errors

Returns an ExecutionError::StackTooSmall error if the stack is not long enough to perform the swap.

Returns

Returns an array containing the two swapped words.

Trait Implementations

impl Clone for Stack

Implements the Clone trait for the Stack struct.

fn clone(&self) -> Self

Returns a new instance of Stack with the same elements as self.

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

Performs copy-assignment from source.

impl Debug for Stack

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

Formats the value using the given formatter.