File is a bit longer, but with simpler logic since parameters are now
named, and order does not matter anymore.
Command and its parameters are transformed into endpoint + url encoded
body (param1=xxx¶m2=yyy...).
Removed verbose option and added a -c option which prints colored JSON
(off by default).
Help message does not rely on API /help endpoint anymore and contains a
list of all the available commands.
* Bitcoin tests: generate 150 blocks instead of 500
We don't need to generate 432 blocks to activate segwit but we still need to have
spendable coins and coinbase maturity is 100 blocks even on regtest.
* Electrum client: test against mainnet Electrum servers
Previous test against testnet servers was flaky because testnet Electrum
servers are unrelable. Here we test against our own server on mainnet (and
2 servers from our list for the pool test).
Bitcoin Core 0.18 is about to enter RC cycle and should be release soon (initial target was April). It is not compatible with 0.16 (some of the RPC calls that we use have been removed. They're still available in 0.17 but tagged as deprecated).
With this PR, eclair will be compatible with 0.17 and the upcoming 0.18, but not with 0.16 any more so it will be a breaking change for some of our users. Supporting the last 2 versions is the right option and we should be ready before 0.18 is actually released (its initial target was April).
* don't spam with channel_updates at startup
Previous logic was very simple but naive:
- every time a channel_update changed we would send it out
- we would always make a new channel_update with the disabled flag set
at startup.
In case our node was simply restarted, this resulted in us re-sending a
channel_update with the disabled flag set, then a second one with the
disabled flag unset a few seconds later, for each public channel.
On top of that, this opened way to a bug: if reconnection is very fast,
then the two successive channel_update will have the same timestamp,
causing the router to not send the second one, which means that the
channel would be considered disabled by the network, and excluded from
payments.
The new logic is as follows:
- when we do NORMAL->NORMAL or NORMAL->OFFLINE or OFFLINE->NORMAL, we
send out the new channel_update if it has changed
- in all other case (e.g. WAIT_FOR_INIT_INTERNAL->OFFLINE) we do nothing
As a side effect, if we were connected to a peer, then we shut down
eclair, then the peer goes down, then we restart eclair: we will make a
new channel_update with the disabled flag set but we won't broadcast it.
If someone tries to make a payment to that node, we will return the
new channel_update with disabled flag set (and maybe the payer will then
broadcast that channel_update). So even in that corner case we are good.
* quick reconnection: bump channel_update timestamp
In case of a disconnection-reconnection, we first generate a
channel_update with disabled bit set, then after we reconnect we
generate a second channel_update with disabled bit not set.
If this happens very quickly, then both channel_updates will have the
same timestamp, and the second one will get ignored by the network.
A simple fix is to bump the second timestamp in this case.
* set channel_update refresh timer at reconnection
We only care about this timer when connected anyway. We also cancel it
when disconnecting.
This has several advantages:
- having a static task resulted in unnecessary refresh if the channel
got disconnected/reconnected in between 2 weeks
- better repartition of the channel_update refresh over time because at
startup all channels were generated at the same time causing all refresh
tasks to be synchronized
- less overhead for the scheduler (because we cancel refresh task for
offline channels (minor, but still)
