Hi ZmnSCPxj,

No, channel balance of each peer on the channel is not revealed on node gossip.

Logically, invert the question: do you want to report how much you spend/receive on each of your channels to the network? Do you want to report how much you own on Lightning to be reported to everyone on Lightning?

Since the balance on each peer is effectively the amount of money each peer owns on that channel, and each change to that balance represents a send/receive on that channel, you will not want to report your balance, and any changes in that balance, to the entire network.

Logically you can then expect not to receive such updates from anybody else, either.

How do real-life implementations like c-lightning get your payment routes then?  By brute-force trial-and-error

If payment routes are discovered by brute-force trial-and-error, and actually the sender can interrupt any payment by simply not revealing the secret, isn't it possible for any sender to simply start probing to discover the capacities in each path?

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