public static UnsignedTx CreateDebugChannelCloseMutual(this FlatClient client, ChannelCloseMutualTx tx) => client.CreateDebugChannelCloseMutualAsync(tx).RunAndUnwrap();
public Task <UnsignedTx> CreateDebugChannelCloseMutualAsync(ChannelCloseMutualTx tx, CancellationToken token = default(CancellationToken)) => _apiClient.PostChannelCloseMutualAsync(tx, token);