> ## 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. # Error > Auto-generated API documentation [**@tevm/voltaire**](../../../index.mdx) *** [@tevm/voltaire](../../../index.mdx) / [primitives/Abi](../index.mdx) / Error # Error ## Interfaces ### AbiErrorConstructor() Defined in: [src/primitives/Abi/error/AbiErrorConstructor.ts:27](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/AbiErrorConstructor.ts#L27) > **AbiErrorConstructor**\<`TName`, `TInputs`>(`error`): `AbiErrorPrototype`\<`TName`, `TInputs`> Defined in: [src/primitives/Abi/error/AbiErrorConstructor.ts:28](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/AbiErrorConstructor.ts#L28) #### Type Parameters ##### TName `TName` *extends* `string` = `string` ##### TInputs `TInputs` *extends* readonly `ParameterType`\[] = readonly `ParameterType`\[] #### Parameters ##### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> #### Returns `AbiErrorPrototype`\<`TName`, `TInputs`> #### Properties ##### decodeParams() > **decodeParams**: \<`TName`, `TInputs`>(`error`, `data`) => `ParametersToPrimitiveTypes`\<`TInputs`> Defined in: [src/primitives/Abi/error/AbiErrorConstructor.ts:38](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/AbiErrorConstructor.ts#L38) Decode error parameters from encoded data ###### Type Parameters ###### TName `TName` *extends* `string` ###### TInputs `TInputs` *extends* readonly `ParameterType`\<`AbiType`, `string`, `string`>\[] ###### Parameters ###### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> ABI error definition ###### data `Uint8Array`\<`ArrayBufferLike`> Encoded error data with selector prefix ###### Returns `ParametersToPrimitiveTypes`\<`TInputs`> Decoded parameter values ###### Throws If data is too short for selector ###### Throws If selector doesn't match expected ###### Example ```typescript theme={null} const error = { type: "error", name: "InsufficientBalance", inputs: [{ type: "uint256", name: "balance" }] }; const decoded = decodeParams(error, encodedData); // [100n] ``` ##### encodeParams() > **encodeParams**: \<`TName`, `TInputs`>(`error`, `args`) => `Uint8Array`\<`ArrayBufferLike`> Defined in: [src/primitives/Abi/error/AbiErrorConstructor.ts:37](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/AbiErrorConstructor.ts#L37) Encode error parameters with selector prefix ###### Type Parameters ###### TName `TName` *extends* `string` ###### TInputs `TInputs` *extends* readonly `ParameterType`\<`AbiType`, `string`, `string`>\[] ###### Parameters ###### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> ABI error definition ###### args `ParametersToPrimitiveTypes`\<`TInputs`> Parameter values to encode ###### Returns `Uint8Array`\<`ArrayBufferLike`> Encoded error data with 4-byte selector prefix ###### Example ```typescript theme={null} const error = { type: "error", name: "InsufficientBalance", inputs: [{ type: "uint256", name: "balance" }] }; const encoded = encodeParams(error, [100n]); // Uint8Array with selector + encoded params ``` ##### getSelector() > **getSelector**: (`error`) => `Uint8Array` Defined in: [src/primitives/Abi/error/AbiErrorConstructor.ts:35](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/AbiErrorConstructor.ts#L35) ###### Parameters ###### error `any` ###### Returns `Uint8Array` ##### getSignature() > **getSignature**: \<`TName`, `TInputs`>(`error`) => `string` Defined in: [src/primitives/Abi/error/AbiErrorConstructor.ts:36](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/AbiErrorConstructor.ts#L36) Get the signature string for an error (e.g., "MyError(uint256,address)") ###### Type Parameters ###### TName `TName` *extends* `string` ###### TInputs `TInputs` *extends* readonly `ParameterType`\<`AbiType`, `string`, `string`>\[] ###### Parameters ###### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> ABI error definition ###### Returns `string` Error signature string ###### Example ```typescript theme={null} const error = { type: "error", name: "Unauthorized", inputs: [{ type: "address", name: "sender" }] }; const sig = getSignature(error); // "Unauthorized(address)" ``` ##### prototype > **prototype**: `AbiErrorPrototype` Defined in: [src/primitives/Abi/error/AbiErrorConstructor.ts:34](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/AbiErrorConstructor.ts#L34) ## Type Aliases ### ErrorType > **ErrorType**\<`TName`, `TInputs`> = `object` Defined in: [src/primitives/Abi/error/ErrorType.ts:3](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/ErrorType.ts#L3) #### Type Parameters ##### TName `TName` *extends* `string` = `string` ##### TInputs `TInputs` *extends* readonly `Parameter`\[] = readonly `Parameter`\[] #### Properties ##### inputs > **inputs**: `TInputs` Defined in: [src/primitives/Abi/error/ErrorType.ts:9](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/ErrorType.ts#L9) ##### name > **name**: `TName` Defined in: [src/primitives/Abi/error/ErrorType.ts:8](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/ErrorType.ts#L8) ##### type > **type**: `"error"` Defined in: [src/primitives/Abi/error/ErrorType.ts:7](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/ErrorType.ts#L7) ## Variables ### AbiError > `const` **AbiError**: [`AbiErrorConstructor`](#abierrorconstructor) Defined in: [src/primitives/Abi/error/index.ts:18](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/index.ts#L18) *** ### Error > `const` **Error**: `object` Defined in: [src/primitives/Abi/error/Error.js:30](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/Error.js#L30) Factory function for creating Error instances Note: Error is a plain object, not a class instance This namespace provides convenient methods for working with errors #### Type Declaration ##### decodeParams() > **decodeParams**: \<`TName`, `TInputs`>(`error`, `data`) => `ParametersToPrimitiveTypes`\<`TInputs`> Decode error parameters from encoded data ###### Type Parameters ###### TName `TName` *extends* `string` ###### TInputs `TInputs` *extends* readonly `ParameterType`\<`AbiType`, `string`, `string`>\[] ###### Parameters ###### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> ABI error definition ###### data `Uint8Array`\<`ArrayBufferLike`> Encoded error data with selector prefix ###### Returns `ParametersToPrimitiveTypes`\<`TInputs`> Decoded parameter values ###### Throws If data is too short for selector ###### Throws If selector doesn't match expected ###### Example ```typescript theme={null} const error = { type: "error", name: "InsufficientBalance", inputs: [{ type: "uint256", name: "balance" }] }; const decoded = decodeParams(error, encodedData); // [100n] ``` ##### encodeParams() > **encodeParams**: \<`TName`, `TInputs`>(`error`, `args`) => `Uint8Array`\<`ArrayBufferLike`> Encode error parameters with selector prefix ###### Type Parameters ###### TName `TName` *extends* `string` ###### TInputs `TInputs` *extends* readonly `ParameterType`\<`AbiType`, `string`, `string`>\[] ###### Parameters ###### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> ABI error definition ###### args `ParametersToPrimitiveTypes`\<`TInputs`> Parameter values to encode ###### Returns `Uint8Array`\<`ArrayBufferLike`> Encoded error data with 4-byte selector prefix ###### Example ```typescript theme={null} const error = { type: "error", name: "InsufficientBalance", inputs: [{ type: "uint256", name: "balance" }] }; const encoded = encodeParams(error, [100n]); // Uint8Array with selector + encoded params ``` ##### getSelector() > **getSelector**: (`error`) => `Uint8Array` ###### Parameters ###### error `any` ###### Returns `Uint8Array` ##### GetSelector() > **GetSelector**: (`deps`) => (`error`) => `Uint8Array` Factory: Get the 4-byte selector for an error ###### Parameters ###### deps Crypto dependencies ###### keccak256String (`str`) => `Uint8Array` Keccak256 hash function for strings ###### Returns Function that computes error selector > (`error`): `Uint8Array` ###### Parameters ###### error `any` ###### Returns `Uint8Array` ###### See [https://voltaire.tevm.sh/primitives/abi](https://voltaire.tevm.sh/primitives/abi) ###### Since 0.0.0 ###### Example ```javascript theme={null} import { GetSelector } from './primitives/Abi/error/index.js'; import { keccak256String } from './primitives/Hash/index.js'; const getSelector = GetSelector({ keccak256String }); const error = { type: "error", name: "Unauthorized", inputs: [] }; const selector = getSelector(error); ``` ##### getSignature() > **getSignature**: \<`TName`, `TInputs`>(`error`) => `string` Get the signature string for an error (e.g., "MyError(uint256,address)") ###### Type Parameters ###### TName `TName` *extends* `string` ###### TInputs `TInputs` *extends* readonly `ParameterType`\<`AbiType`, `string`, `string`>\[] ###### Parameters ###### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> ABI error definition ###### Returns `string` Error signature string ###### Example ```typescript theme={null} const error = { type: "error", name: "Unauthorized", inputs: [{ type: "address", name: "sender" }] }; const sig = getSignature(error); // "Unauthorized(address)" ``` #### See [https://voltaire.tevm.sh/primitives/abi](https://voltaire.tevm.sh/primitives/abi) #### Since 0.0.0 #### Throws #### Example ```javascript theme={null} import * as Abi from './primitives/Abi/index.js'; const error = { type: 'error', name: 'Unauthorized', inputs: [{ type: 'address', name: 'caller' }] }; const selector = Abi.Error.getSelector(error); ``` *** ### getSelector() > `const` **getSelector**: (`error`) => `Uint8Array` Defined in: [src/primitives/Abi/error/index.ts:24](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/index.ts#L24) #### Parameters ##### error `any` #### Returns `Uint8Array` ## Functions ### decodeParams() > **decodeParams**\<`TName`, `TInputs`>(`error`, `data`): `ParametersToPrimitiveTypes`\<`TInputs`> Defined in: [src/primitives/Abi/error/decodeParams.js:22](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/decodeParams.js#L22) Decode error parameters from encoded data #### Type Parameters ##### TName `TName` *extends* `string` ##### TInputs `TInputs` *extends* readonly `ParameterType`\<`AbiType`, `string`, `string`>\[] #### Parameters ##### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> ABI error definition ##### data `Uint8Array`\<`ArrayBufferLike`> Encoded error data with selector prefix #### Returns `ParametersToPrimitiveTypes`\<`TInputs`> Decoded parameter values #### Throws If data is too short for selector #### Throws If selector doesn't match expected #### Example ```typescript theme={null} const error = { type: "error", name: "InsufficientBalance", inputs: [{ type: "uint256", name: "balance" }] }; const decoded = decodeParams(error, encodedData); // [100n] ``` *** ### encodeParams() > **encodeParams**\<`TName`, `TInputs`>(`error`, `args`): `Uint8Array`\<`ArrayBufferLike`> Defined in: [src/primitives/Abi/error/encodeParams.js:19](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/encodeParams.js#L19) Encode error parameters with selector prefix #### Type Parameters ##### TName `TName` *extends* `string` ##### TInputs `TInputs` *extends* readonly `ParameterType`\<`AbiType`, `string`, `string`>\[] #### Parameters ##### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> ABI error definition ##### args `ParametersToPrimitiveTypes`\<`TInputs`> Parameter values to encode #### Returns `Uint8Array`\<`ArrayBufferLike`> Encoded error data with 4-byte selector prefix #### Example ```typescript theme={null} const error = { type: "error", name: "InsufficientBalance", inputs: [{ type: "uint256", name: "balance" }] }; const encoded = encodeParams(error, [100n]); // Uint8Array with selector + encoded params ``` *** ### GetSelector() > **GetSelector**(`deps`): (`error`) => `Uint8Array` Defined in: [src/primitives/Abi/error/getSelector.js:21](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/getSelector.js#L21) Factory: Get the 4-byte selector for an error #### Parameters ##### deps Crypto dependencies ###### keccak256String (`str`) => `Uint8Array` Keccak256 hash function for strings #### Returns Function that computes error selector > (`error`): `Uint8Array` ##### Parameters ###### error `any` ##### Returns `Uint8Array` #### See [https://voltaire.tevm.sh/primitives/abi](https://voltaire.tevm.sh/primitives/abi) #### Since 0.0.0 #### Example ```javascript theme={null} import { GetSelector } from './primitives/Abi/error/index.js'; import { keccak256String } from './primitives/Hash/index.js'; const getSelector = GetSelector({ keccak256String }); const error = { type: "error", name: "Unauthorized", inputs: [] }; const selector = getSelector(error); ``` *** ### getSignature() > **getSignature**\<`TName`, `TInputs`>(`error`): `string` Defined in: [src/primitives/Abi/error/getSignature.js:15](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/Abi/error/getSignature.js#L15) Get the signature string for an error (e.g., "MyError(uint256,address)") #### Type Parameters ##### TName `TName` *extends* `string` ##### TInputs `TInputs` *extends* readonly `ParameterType`\<`AbiType`, `string`, `string`>\[] #### Parameters ##### error [`ErrorType`](#errortype)\<`TName`, `TInputs`> ABI error definition #### Returns `string` Error signature string #### Example ```typescript theme={null} const error = { type: "error", name: "Unauthorized", inputs: [{ type: "address", name: "sender" }] }; const sig = getSignature(error); // "Unauthorized(address)" ```