code: func (ec *Client) PendingStorageAt(ctx context.Context, account common.Address, key common.Hash) ([]byte, error) {
  	var result hexutil.Bytes
  	err := ec.c.CallContext(ctx, &result, "eth_getStorageAt", account, key, "pending")
  	return result, err
  }
docs: // PendingStorageAt returns the value of key in the contract storage of the given account in the pending state.