get Balance
abstract suspend fun getBalance(request: GetBalanceRequest): <Error class: unknown class><GetBalanceResponse, <Error class: unknown class>>
abstract suspend fun getBalance(owner: String, coinType: String? = null): <Error class: unknown class><GetBalanceResponse, <Error class: unknown class>>
abstract suspend fun getBalance(owner: <Error class: unknown class>, coinType: String? = null): <Error class: unknown class><GetBalanceResponse, <Error class: unknown class>>