code: func (ec *EthereumClient) GetPendingBalanceAt(ctx *Context, account *Address) (balance *BigInt, _ error) {
  	rawBalance, err := ec.client.PendingBalanceAt(ctx.context, account.address)
  	return &BigInt{rawBalance}, err
  }
docs: // Pending State
  // GetPendingBalanceAt returns the wei balance of the given account in the pending state.