We knew it wasn't comparable to noncustodial lightning, but I assumed that Spark customers would retain the privacy of a custodial service. That is, I thought Spark would know about balances and transactions - not anyone curious enough to look. This is akin to Coinbase giving each customer a bitcoin address and forcing reuse.

So bottom line what we're saying is that `spark negates lightning privacy benefits` - but we already knew that it wasn't comparable, right?

optimism

In addition to @benthecarman's tool, there's also this

https://lightningdecoder.com/

Scoresby

Eh there's not much difference between calling something like 

If someone in possession of one of your bolt11s wants to know your balance and transactions, they won't need new skills to do it - just the right tool.

lightning

Does Wallet of Satoshi make all users balances public via Spark?

Eh there's not much difference between calling something like `decodeSparkPaymentRequest` and `decodePaymentRequest`. 

If someone in possession of one of your bolt11s wants to know your balance and transactions, they won't need new skills to do it - just the right tool.