> ## 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. # Item > Auto-generated API documentation [**@tevm/voltaire**](../../../index.mdx) *** [@tevm/voltaire](../../../index.mdx) / [primitives/Abi](../index.mdx) / Item # Item ## Interfaces ### ItemConstructor Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:10](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L10) Item constructor interface - provides type guards and utilities for ABI items #### Methods ##### format() > **format**(`item`): `string` Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:44](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L44) Format an ABI item to a human-readable string ###### Parameters ###### item [`ItemType`](#itemtype) ###### Returns `string` ##### formatWithArgs() > **formatWithArgs**(`item`, `args`): `string` Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:49](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L49) Format an ABI item with concrete argument values ###### Parameters ###### item [`ItemType`](#itemtype) ###### args readonly `unknown`\[] ###### Returns `string` ##### getItem() > **getItem**\<`TAbi`, `TName`, `TType`>(`abi`, `name`, `type?`): `Extract`\<`TAbi`\[`number`], \{ `name`: `TName`; }> | `undefined` Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:54](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L54) Get an item from an ABI by name and optionally by type ###### Type Parameters ###### TAbi `TAbi` *extends* readonly [`ItemType`](#itemtype)\[] ###### TName `TName` *extends* `string` ###### TType `TType` *extends* `"function"` | `"event"` | `"constructor"` | `"error"` | `"fallback"` | `"receive"` | `undefined` = `undefined` ###### Parameters ###### abi `TAbi` ###### name `TName` ###### type? `TType` ###### Returns `Extract`\<`TAbi`\[`number`], \{ `name`: `TName`; }> | `undefined` ##### isConstructor() > **isConstructor**(`item`): `item is ConstructorType` Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:29](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L29) Type guard to check if an item is a Constructor ###### Parameters ###### item [`ItemType`](#itemtype) ###### Returns `item is ConstructorType` ##### isError() > **isError**(`item`): `item is ErrorType` Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:24](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L24) Type guard to check if an item is an Error ###### Parameters ###### item [`ItemType`](#itemtype) ###### Returns `item is ErrorType` ##### isEvent() > **isEvent**(`item`): `item is EventType` Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:19](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L19) Type guard to check if an item is an Event ###### Parameters ###### item [`ItemType`](#itemtype) ###### Returns `item is EventType` ##### isFallback() > **isFallback**(`item`): `item is Fallback` Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:34](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L34) Type guard to check if an item is a Fallback ###### Parameters ###### item [`ItemType`](#itemtype) ###### Returns `item is Fallback` ##### isFunction() > **isFunction**(`item`): `item is FunctionType` Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:14](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L14) Type guard to check if an item is a Function ###### Parameters ###### item [`ItemType`](#itemtype) ###### Returns `item is FunctionType` ##### isReceive() > **isReceive**(`item`): `item is Receive` Defined in: [src/primitives/Abi/Item/ItemConstructor.ts:39](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemConstructor.ts#L39) Type guard to check if an item is a Receive ###### Parameters ###### item [`ItemType`](#itemtype) ###### Returns `item is Receive` ## Type Aliases ### Fallback > **Fallback**\<`TStateMutability`> = `object` Defined in: [src/primitives/Abi/Item/ItemType.ts:7](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemType.ts#L7) #### Type Parameters ##### TStateMutability `TStateMutability` *extends* [`StateMutability`](Function.mdx#statemutability-1) = [`StateMutability`](Function.mdx#statemutability-1) #### Properties ##### stateMutability > **stateMutability**: `TStateMutability` Defined in: [src/primitives/Abi/Item/ItemType.ts:11](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemType.ts#L11) ##### type > **type**: `"fallback"` Defined in: [src/primitives/Abi/Item/ItemType.ts:10](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemType.ts#L10) *** ### ItemType > **ItemType** = [`FunctionType`](Function.mdx#functiontype) | [`EventType`](Event.mdx#eventtype) | [`ErrorType`](Error.mdx#errortype) | [`ConstructorType`](Constructor.mdx#constructortype) | [`Fallback`](#fallback) | [`Receive`](#receive) Defined in: [src/primitives/Abi/Item/ItemType.ts:22](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemType.ts#L22) ItemType - discriminated union of all ABI item types *** ### Receive > **Receive** = `object` Defined in: [src/primitives/Abi/Item/ItemType.ts:14](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemType.ts#L14) #### Properties ##### stateMutability > **stateMutability**: `"payable"` Defined in: [src/primitives/Abi/Item/ItemType.ts:16](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemType.ts#L16) ##### type > **type**: `"receive"` Defined in: [src/primitives/Abi/Item/ItemType.ts:15](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/ItemType.ts#L15) ## Variables ### Item > `const` **Item**: [`ItemConstructor`](#itemconstructor) Defined in: [src/primitives/Abi/Item/Item.js:28](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/Item.js#L28) Item "class" - a namespace object for ABI item operations ## Functions ### \_format() > **\_format**(`item`): `string` Defined in: [src/primitives/Abi/Item/format.js:6](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/format.js#L6) Format an ABI item to a human-readable string #### Parameters ##### item [`ItemType`](#itemtype) The item to format #### Returns `string` *** ### \_formatWithArgs() > **\_formatWithArgs**(`item`, `args`): `string` Defined in: [src/primitives/Abi/Item/formatWithArgs.js:9](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/formatWithArgs.js#L9) Format an ABI item with concrete argument values #### Parameters ##### item [`ItemType`](#itemtype) The item to format ##### args readonly `unknown`\[] The argument values #### Returns `string` *** ### \_getItem() > **\_getItem**\<`TAbi`, `TName`, `TType`>(`abi`, `name`, `type?`): `any` Defined in: [src/primitives/Abi/Item/getItem.js:11](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/getItem.js#L11) Get an item from an ABI by name and optionally by type #### Type Parameters ##### TAbi `TAbi` *extends* readonly [`ItemType`](#itemtype)\[] ##### TName `TName` *extends* `string` ##### TType `TType` *extends* `"function"` | `"event"` | `"constructor"` | `"error"` | `"fallback"` | `"receive"` | `undefined` #### Parameters ##### abi `TAbi` The ABI array ##### name `TName` The item name ##### type? `TType` Optional type filter #### Returns `any` *** ### \_isConstructor() > **\_isConstructor**(`item`): `item is ConstructorType` Defined in: [src/primitives/Abi/Item/isConstructor.js:6](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/isConstructor.js#L6) Type guard to check if an item is a Constructor #### Parameters ##### item [`ItemType`](#itemtype) The item to check #### Returns `item is ConstructorType` *** ### \_isError() > **\_isError**(`item`): `item is ErrorType` Defined in: [src/primitives/Abi/Item/isError.js:6](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/isError.js#L6) Type guard to check if an item is an Error #### Parameters ##### item [`ItemType`](#itemtype) The item to check #### Returns `item is ErrorType` *** ### \_isEvent() > **\_isEvent**(`item`): `item is EventType` Defined in: [src/primitives/Abi/Item/isEvent.js:6](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/isEvent.js#L6) Type guard to check if an item is an Event #### Parameters ##### item [`ItemType`](#itemtype) The item to check #### Returns `item is EventType` *** ### \_isFallback() > **\_isFallback**(`item`): `item is Fallback` Defined in: [src/primitives/Abi/Item/isFallback.js:6](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/isFallback.js#L6) Type guard to check if an item is a Fallback #### Parameters ##### item [`ItemType`](#itemtype) The item to check #### Returns `item is Fallback` *** ### \_isFunction() > **\_isFunction**(`item`): `item is FunctionType` Defined in: [src/primitives/Abi/Item/isFunction.js:6](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/isFunction.js#L6) Type guard to check if an item is a Function #### Parameters ##### item [`ItemType`](#itemtype) The item to check #### Returns `item is FunctionType` *** ### \_isReceive() > **\_isReceive**(`item`): `item is Receive` Defined in: [src/primitives/Abi/Item/isReceive.js:6](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/Item/isReceive.js#L6) Type guard to check if an item is a Receive #### Parameters ##### item [`ItemType`](#itemtype) The item to check #### Returns `item is Receive` ## References ### BrandedItem Renames and re-exports [ItemType](#itemtype) *** ### format Renames and re-exports [\_format](#_format) *** ### formatWithArgs Renames and re-exports [\_formatWithArgs](#_formatwithargs) *** ### getItem Renames and re-exports [\_getItem](#_getitem) *** ### isConstructor Renames and re-exports [\_isConstructor](#_isconstructor) *** ### isError Renames and re-exports [\_isError](#_iserror) *** ### isEvent Renames and re-exports [\_isEvent](#_isevent) *** ### isFallback Renames and re-exports [\_isFallback](#_isfallback) *** ### isFunction Renames and re-exports [\_isFunction](#_isfunction) *** ### isReceive Renames and re-exports [\_isReceive](#_isreceive)