async Task Deposit(DepositAmount depositAmount)
{
var dac = await _env.GetAccountAmount(ThisActor);
await _env.PutAccountAmount(ThisActor, dac + depositAmount.Amount);
// after depositing, we send message to ourself to transfer
// the amount to the next actor in ring
await RetryPolicy.SendWithBackOff(_env, ThisActor, new SendAmount(depositAmount.Amount, NextActor));
}
