@ -304,7 +304,7 @@ The payee will choose a truely random number `r` and produces the `sha256` of th
Note that an adversary should have no means of guessing or predicting `r`.
Using a customer id or the hash of entries of the shopping cart together with a timestamp is not truely random and yields a security risk.
The payment process of the lightning network is only secure if `r` is choosen completely randomly and is not predictable and as long as the Hash function cannot be inverted.
We note that this is not an additional security assumption to Bitcoin as the security of the Hash function is currently what Bitcoin mining is building upon.
We note that this is not an additional security assumption to Bitcoin as the security of the Hash function is currently what Bitcoin mining is building upon.
==== Additional Meta Data
Invoices can encode some other useful meta data.
@ -314,7 +314,7 @@ As payment channel do not need to be publically announced the payee can also pro
These hints can also be used for public channels to point to those channels on which the payee has enough inbound liquidity to actually receive the amount.
In case the payers lightning node is not able to send the payment over the lightning network invoices can also include a fallback address.
We would however always recomend to open a new payment channel instead of doing an on chain transaction that does not add an additional payment channel
Invoiceses also have an expiry time so that the payee can delete the preimage after some time to free up space.
Invoiceses also have an expiry time so that the payee can delete the preimage after some time to free up space.
=== Delivering the payment
@ -365,8 +365,8 @@ This strategy relates closely to the routing algorithm hat is used.
As we will see in the next section on the Lightning Network we use a source based onion routing protocol for routing payments.
This means in particular that the sender of the payment has to find a path through the network.
As mentioned before with only partial information about the network topology this is a real challange and active research is still being conducted into optimizing this part of the Lightning Network implementations.
The fact that the pathfinding problem is not fully solved for the case of the Lightning Network is a major point of criticism towards the technology.
On the good side we emphasize that the certainly not optimal strategy - that is currently being used - of probing paths until one has enough liquidity to forward the payment works still rather well.
The fact that the pathfinding problem is not fully solved for the case of the Lightning Network is a major point of criticism towards the technology.
On the good side we emphasize that the certainly not optimal strategy - that is currently being used - of probing paths until one has enough liquidity to forward the payment works still rather well.
HAOYUatHZ
5 years ago