> ## 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.

# primitives/InitCode

> Auto-generated API documentation

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

***

[@tevm/voltaire](../index.mdx) / primitives/InitCode

# primitives/InitCode

## Type Aliases

### InitCodeType

> **InitCodeType** = `Uint8Array` & `object`

Defined in: [src/primitives/InitCode/InitCodeType.ts:8](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/InitCodeType.ts#L8)

Branded InitCode type
Contract creation bytecode (constructor + runtime code)
Deployed during contract creation transaction

#### Type Declaration

##### \[brand]

> `readonly` **\[brand]**: `"InitCode"`

## Functions

### \_equals()

> **\_equals**(`a`, `b`): `boolean`

Defined in: [src/primitives/InitCode/equals.js:15](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/equals.js#L15)

Check if two InitCode instances are equal

#### Parameters

##### a

[`InitCodeType`](#initcodetype)

First InitCode

##### b

[`InitCodeType`](#initcodetype)

Second InitCode

#### Returns

`boolean`

true if equal

#### Example

```javascript theme={null}
import * as InitCode from './primitives/InitCode/index.js';
const code1 = InitCode.from("0x6001");
const code2 = InitCode.from("0x6001");
InitCode._equals(code1, code2); // true
```

***

### \_estimateGas()

> **\_estimateGas**(`code`): `bigint`

Defined in: [src/primitives/InitCode/estimateGas.js:16](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/estimateGas.js#L16)

Estimate gas cost for contract creation

Gas cost = 21000 (base) + 200 \* non-zero bytes + 4 \* zero bytes + 32000 (creation)

#### Parameters

##### code

[`InitCodeType`](#initcodetype)

InitCode

#### Returns

`bigint`

Estimated gas cost

#### Example

```javascript theme={null}
import * as InitCode from './primitives/InitCode/index.js';
const init = InitCode.from("0x608060405234801561001057600080fd5b50...");
const gas = InitCode._estimateGas(init);
console.log(`Estimated gas: ${gas}`);
```

***

### \_extractRuntime()

> **\_extractRuntime**(`code`, `offset`): [`RuntimeCodeType`](RuntimeCode.mdx#runtimecodetype)

Defined in: [src/primitives/InitCode/extractRuntime.js:18](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/extractRuntime.js#L18)

Extract runtime code from init code at specified offset

Init code contains constructor logic followed by runtime code.
This extracts the runtime portion starting at the given offset.

#### Parameters

##### code

[`InitCodeType`](#initcodetype)

InitCode

##### offset

`number`

Byte offset where runtime code starts

#### Returns

[`RuntimeCodeType`](RuntimeCode.mdx#runtimecodetype)

RuntimeCode

#### Example

```javascript theme={null}
import * as InitCode from './primitives/InitCode/index.js';
const init = InitCode.from("0x608060405234801561001057600080fd5b50...");
// Assume constructor is 100 bytes
const runtime = InitCode._extractRuntime(init, 100);
```

***

### \_toHex()

> **\_toHex**(`data`): [`HexType`](Hex.mdx#hextype)

Defined in: [src/primitives/InitCode/toHex.js:15](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/toHex.js#L15)

Convert InitCode to hex string

#### Parameters

##### data

[`InitCodeType`](#initcodetype)

InitCode

#### Returns

[`HexType`](Hex.mdx#hextype)

Hex string

#### Example

```javascript theme={null}
import * as InitCode from './primitives/InitCode/index.js';
const code = InitCode.from("0x608060405234801561001057600080fd5b50...");
const hex = InitCode._toHex(code);
```

***

### equals()

> **equals**(`a`, `b`): `boolean`

Defined in: [src/primitives/InitCode/index.ts:18](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/index.ts#L18)

#### Parameters

##### a

`string` | `Uint8Array`\<`ArrayBufferLike`> | [`InitCodeType`](#initcodetype)

##### b

`string` | `Uint8Array`\<`ArrayBufferLike`> | [`InitCodeType`](#initcodetype)

#### Returns

`boolean`

***

### estimateGas()

> **estimateGas**(`value`): `bigint`

Defined in: [src/primitives/InitCode/index.ts:38](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/index.ts#L38)

#### Parameters

##### value

`string` | `Uint8Array`\<`ArrayBufferLike`> | [`InitCodeType`](#initcodetype)

#### Returns

`bigint`

***

### extractRuntime()

> **extractRuntime**(`value`, `offset`): [`RuntimeCodeType`](RuntimeCode.mdx#runtimecodetype)

Defined in: [src/primitives/InitCode/index.ts:31](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/index.ts#L31)

#### Parameters

##### value

`string` | `Uint8Array`\<`ArrayBufferLike`> | [`InitCodeType`](#initcodetype)

##### offset

`number`

#### Returns

[`RuntimeCodeType`](RuntimeCode.mdx#runtimecodetype)

***

### from()

> **from**(`value`): [`InitCodeType`](#initcodetype)

Defined in: [src/primitives/InitCode/from.js:18](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/from.js#L18)

Create InitCode from various input types

#### Parameters

##### value

Hex string or Uint8Array

`string` | `Uint8Array`\<`ArrayBufferLike`>

#### Returns

[`InitCodeType`](#initcodetype)

InitCode

#### See

[https://voltaire.tevm.sh/primitives/init-code](https://voltaire.tevm.sh/primitives/init-code) for InitCode documentation

#### Since

0.0.0

#### Throws

#### Example

```javascript theme={null}
import * as InitCode from './primitives/InitCode/index.js';
const code1 = InitCode.from("0x608060405234801561001057600080fd5b50...");
const code2 = InitCode.from(new Uint8Array([0x60, 0x80, 0x60, 0x40, ...]));
```

***

### fromHex()

> **fromHex**(`hex`): [`InitCodeType`](#initcodetype)

Defined in: [src/primitives/InitCode/fromHex.js:15](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/fromHex.js#L15)

Create InitCode from hex string

#### Parameters

##### hex

`string`

Hex string

#### Returns

[`InitCodeType`](#initcodetype)

InitCode

#### Throws

If hex string is invalid

#### Example

```javascript theme={null}
import * as InitCode from './primitives/InitCode/index.js';
const code = InitCode.fromHex("0x608060405234801561001057600080fd5b50...");
```

***

### toHex()

> **toHex**(`value`): [`HexType`](Hex.mdx#hextype)

Defined in: [src/primitives/InitCode/index.ts:25](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/InitCode/index.ts#L25)

#### Parameters

##### value

`string` | `Uint8Array`\<`ArrayBufferLike`> | [`InitCodeType`](#initcodetype)

#### Returns

[`HexType`](Hex.mdx#hextype)