viem/utils/kzg/setupKzg.ts

TypeScript Interface for Ethereum

import type { ErrorType } from '../../errors/utils.js'
import {
  type DefineKzgErrorType,
  type DefineKzgParameters,
  type DefineKzgReturnType,
  defineKzg,
} from './defineKzg.js'

export type SetupKzgParameters = DefineKzgParameters & {
  loadTrustedSetup(path: string): void
}
export type SetupKzgReturnType = DefineKzgReturnType
export type SetupKzgErrorType = DefineKzgErrorType | ErrorType

/**
 * Sets up and returns a KZG interface.
 *
 * @example
 * ```ts
 * import * as cKzg from 'c-kzg'
 * import { setupKzg } from 'viem'
 * import { mainnetTrustedSetupPath } from 'viem/node'
 *
 * const kzg = setupKzg(cKzg, mainnetTrustedSetupPath)
 * ```
 */
export function setupKzg(
  parameters: SetupKzgParameters,
  path: string,
): SetupKzgReturnType {
  try {
    parameters.loadTrustedSetup(path)
  } catch (e) {
    const error = e as Error
    if (!error.message.includes('trusted setup is already loaded')) throw error
  }
  return defineKzg(parameters)
}