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Overview

Item.isError checks whether an ABI item is a custom error definition and narrows the type in TypeScript.

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Example

import { Abi } from '@tevm/voltaire/Abi';

const item = {
  type: 'error',
  name: 'InsufficientBalance',
  inputs: [
    { type: 'uint256', name: 'balance' },
    { type: 'uint256', name: 'required' }
  ]
} as const;

if (Abi.Item.isError(item)) {
  const selector = Abi.Error.getSelector(item);
}

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See Also