> ## Documentation Index
> Fetch the complete documentation index at: https://voltaire.tevm.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# System

> Auto-generated API documentation

[**@tevm/voltaire**](../../index.mdx)

***

[@tevm/voltaire](../../index.mdx) / [evm](../index.mdx) / System

# System

## Functions

### call()

> **call**(`frame`, `host?`): [`EvmError`](../index.mdx#evmerror) | `null`

Defined in: [src/evm/system/0xf1\_CALL.js:32](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/evm/system/0xf1_CALL.js#L32)

CALL opcode (0xf1) - Message call into an account

Stack: \[gas, address, value, inOffset, inLength, outOffset, outLength] => \[success]
Gas: Complex (base + memory + cold access + value transfer + new account)

## Architecture Note

This is a low-level opcode handler. For full nested execution, the host must
provide a `call` method. Full EVM implementations are in:

* **guillotine**: Production EVM with async state, tracing, full EIP support
* **guillotine-mini**: Lightweight synchronous EVM for testing

When host.call is not provided, returns NotImplemented error.

#### Parameters

##### frame

[`BrandedFrame`](../index.mdx#brandedframe)

Frame instance

##### host?

[`BrandedHost`](../index.mdx#brandedhost)

Host interface (optional)

#### Returns

[`EvmError`](../index.mdx#evmerror) | `null`

Error if any

***

### callcode()

> **callcode**(`frame`, `host?`): [`EvmError`](../index.mdx#evmerror) | `null`

Defined in: [src/evm/system/0xf2\_CALLCODE.js:34](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/evm/system/0xf2_CALLCODE.js#L34)

CALLCODE opcode (0xf2) - Message call into this account with another account's code

Stack: \[gas, address, value, inOffset, inLength, outOffset, outLength] => \[success]
Gas: Similar to CALL but executes code in current context

## Architecture Note

This is a low-level opcode handler. For full nested execution, the host must
provide a `call` method. Full EVM implementations are in:

* **guillotine**: Production EVM with async state, tracing, full EIP support
* **guillotine-mini**: Lightweight synchronous EVM for testing

When host.call is not provided, returns NotImplemented error.

Note: CALLCODE is deprecated in favor of DELEGATECALL (EIP-7).

#### Parameters

##### frame

[`BrandedFrame`](../index.mdx#brandedframe)

Frame instance

##### host?

[`BrandedHost`](../index.mdx#brandedhost)

Host interface (optional)

#### Returns

[`EvmError`](../index.mdx#evmerror) | `null`

Error if any

***

### create()

> **create**(`frame`, `host?`): [`EvmError`](../index.mdx#evmerror) | `null`

Defined in: [src/evm/system/0xf0\_CREATE.js:21](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/evm/system/0xf0_CREATE.js#L21)

CREATE opcode (0xf0) - Create a new contract

Stack: \[value, offset, length] => \[address]
Gas: 32000 + memory expansion + init code hash cost

## Architecture Note

This is a low-level opcode handler. For full nested execution, the host must
provide a `create` method. Full EVM implementations are in:

* **guillotine**: Production EVM with async state, tracing, full EIP support
* **guillotine-mini**: Lightweight synchronous EVM for testing

When host.create is not provided, returns NotImplemented error.

#### Parameters

##### frame

[`BrandedFrame`](../index.mdx#brandedframe)

Frame instance

##### host?

[`BrandedHost`](../index.mdx#brandedhost)

Host interface (optional)

#### Returns

[`EvmError`](../index.mdx#evmerror) | `null`

Error if any

***

### create2()

> **create2**(`frame`, `host?`): [`EvmError`](../index.mdx#evmerror) | `null`

Defined in: [src/evm/system/0xf5\_CREATE2.js:23](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/evm/system/0xf5_CREATE2.js#L23)

CREATE2 opcode (0xf5) - Create a new contract with deterministic address

Stack: \[value, offset, length, salt] => \[address]
Gas: 32000 + memory expansion + init code hash cost + keccak256 cost
Address: keccak256(0xff ++ sender ++ salt ++ keccak256(initCode))
Note: Introduced in EIP-1014 (Constantinople)

## Architecture Note

This is a low-level opcode handler. For full nested execution, the host must
provide a `create` method. Full EVM implementations are in:

* **guillotine**: Production EVM with async state, tracing, full EIP support
* **guillotine-mini**: Lightweight synchronous EVM for testing

When host.create is not provided, returns NotImplemented error.

#### Parameters

##### frame

[`BrandedFrame`](../index.mdx#brandedframe)

Frame instance

##### host?

[`BrandedHost`](../index.mdx#brandedhost)

Host interface (optional)

#### Returns

[`EvmError`](../index.mdx#evmerror) | `null`

Error if any

***

### delegatecall()

> **delegatecall**(`frame`, `host?`): [`EvmError`](../index.mdx#evmerror) | `null`

Defined in: [src/evm/system/0xf4\_DELEGATECALL.js:22](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/evm/system/0xf4_DELEGATECALL.js#L22)

DELEGATECALL opcode (0xf4) - Message call with another account's code, preserving msg.sender and msg.value

Stack: \[gas, address, inOffset, inLength, outOffset, outLength] => \[success]
Gas: Similar to CALL but no value parameter (preserves current msg.value)
Note: Introduced in EIP-7 (Homestead)

## Architecture Note

This is a low-level opcode handler. For full nested execution, the host must
provide a `call` method. Full EVM implementations are in:

* **guillotine**: Production EVM with async state, tracing, full EIP support
* **guillotine-mini**: Lightweight synchronous EVM for testing

When host.call is not provided, returns NotImplemented error.

#### Parameters

##### frame

[`BrandedFrame`](../index.mdx#brandedframe)

Frame instance

##### host?

[`BrandedHost`](../index.mdx#brandedhost)

Host interface (optional)

#### Returns

[`EvmError`](../index.mdx#evmerror) | `null`

Error if any

***

### selfdestruct()

> **selfdestruct**(`frame`): [`EvmError`](../index.mdx#evmerror) | `null`

Defined in: [src/evm/system/0xff\_SELFDESTRUCT.js:14](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/evm/system/0xff_SELFDESTRUCT.js#L14)

SELFDESTRUCT opcode (0xff) - Halt execution and register account for deletion

Stack: \[beneficiary] => \[]
Gas: 5000 + cold account access (EIP-2929) + new account (if needed)
Note: Behavior changed significantly in EIP-6780 (Cancun)

Pre-Cancun: Marks account for deletion, transfers balance to beneficiary
Post-Cancun: Only deletes if account was created in same transaction, always transfers balance

#### Parameters

##### frame

[`BrandedFrame`](../index.mdx#brandedframe)

Frame instance

#### Returns

[`EvmError`](../index.mdx#evmerror) | `null`

Error if any

***

### staticcall()

> **staticcall**(`frame`, `host?`): [`EvmError`](../index.mdx#evmerror) | `null`

Defined in: [src/evm/system/0xfa\_STATICCALL.js:32](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/evm/system/0xfa_STATICCALL.js#L32)

STATICCALL opcode (0xfa) - Static message call (no state modifications allowed)

Stack: \[gas, address, inOffset, inLength, outOffset, outLength] => \[success]
Gas: Similar to CALL but no value parameter
Note: Introduced in EIP-214 (Byzantium)
Note: Sets isStatic flag, preventing any state modifications in called context

## Architecture Note

This is a low-level opcode handler. For full nested execution, the host must
provide a `call` method. Full EVM implementations are in:

* **guillotine**: Production EVM with async state, tracing, full EIP support
* **guillotine-mini**: Lightweight synchronous EVM for testing

When host.call is not provided, returns NotImplemented error.

#### Parameters

##### frame

[`BrandedFrame`](../index.mdx#brandedframe)

Frame instance

##### host?

[`BrandedHost`](../index.mdx#brandedhost)

Host interface (optional)

#### Returns

[`EvmError`](../index.mdx#evmerror) | `null`

Error if any