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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/viem/actions/public

Просмотр файла: getStorageAt.ts

import type { Address } from 'abitype'

import type { Client } from '../../clients/createClient.js'
import type { Transport } from '../../clients/transports/createTransport.js'
import type { ErrorType } from '../../errors/utils.js'
import type { BlockTag } from '../../types/block.js'
import type { Chain } from '../../types/chain.js'
import type { Hex } from '../../types/misc.js'
import type { RequestErrorType } from '../../utils/buildRequest.js'
import {
  type NumberToHexErrorType,
  numberToHex,
} from '../../utils/encoding/toHex.js'

export type GetStorageAtParameters = {
  address: Address
  slot: Hex
} & (
  | {
      blockNumber?: undefined
      blockTag?: BlockTag | undefined
    }
  | {
      blockNumber?: bigint | undefined
      blockTag?: undefined
    }
)

export type GetStorageAtReturnType = Hex | undefined

export type GetStorageAtErrorType =
  | NumberToHexErrorType
  | RequestErrorType
  | ErrorType

/**
 * Returns the value from a storage slot at a given address.
 *
 * - Docs: https://viem.sh/docs/contract/getStorageAt
 * - JSON-RPC Methods: [`eth_getStorageAt`](https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_getstorageat)
 *
 * @param client - Client to use
 * @param parameters - {@link GetStorageAtParameters}
 * @returns The value of the storage slot. {@link GetStorageAtReturnType}
 *
 * @example
 * import { createPublicClient, http } from 'viem'
 * import { mainnet } from 'viem/chains'
 * import { getStorageAt } from 'viem/contract'
 *
 * const client = createPublicClient({
 *   chain: mainnet,
 *   transport: http(),
 * })
 * const code = await getStorageAt(client, {
 *   address: '0xFBA3912Ca04dd458c843e2EE08967fC04f3579c2',
 *   slot: toHex(0),
 * })
 */
export async function getStorageAt<chain extends Chain | undefined>(
  client: Client<Transport, chain>,
  { address, blockNumber, blockTag = 'latest', slot }: GetStorageAtParameters,
): Promise<GetStorageAtReturnType> {
  const blockNumberHex =
    blockNumber !== undefined ? numberToHex(blockNumber) : undefined
  const data = await client.request({
    method: 'eth_getStorageAt',
    params: [address, slot, blockNumberHex || blockTag],
  })
  return data
}

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