PR #5840 mostly fixed#1559, but introduced a new bug. before, you could safely `=dir` into a desk without a case, and it would use the nonexistent case `ud+0` as the beam for dojo state, and switch that out for da+now whenever it tries to resolve the current path. but this check causes it to fail, because `ud+0` is a nonexistent case. this uses he-beam to transform the beam in the conditional to see if the case is 0, and if it is, changes the case to da+now before it scries
This allows you to pass a thread directly into khan, instead of passing
a filename. This has several implications:
- The friction for using threads from an app is significantly lower.
Consider:
=/ shed
=/ m (strand ,vase)
;< ~ bind:m (poke:strandio [our %hood] %helm-hi !>('hi'))
;< ~ bind:m (poke:strandio [our %hood] %helm-hi !>('there'))
(pure:m !>('product'))
[%pass /wire %arvo %k %lard %base shed]
- These threads close over their subject, so you don't need to parse
arguments out from a vase -- you can just refer to them. The produced
value must still be a vase.
++ hi-ship
|= [=ship msg1=@t msg2=@t]
=/ shed
=/ m (strand ,vase)
;< ~ bind:m (poke:strandio [ship %hood] %helm-hi !>(msg1))
;< ~ bind:m (poke:strandio [ship %hood] %helm-hi !>(msg2))
(pure:m !>('product'))
[%pass /wire %arvo %k %lard %base shed]
- Inline threads can be added to the dojo, though this PR does not add
any sugar for this.
=strandio -build-file %/lib/strandio/hoon
=sh |= message=@t
=/ m (strand:rand ,vase)
;< ~ bind:m (poke:strandio [our %hood] %helm-hi !>('hi'))
;< ~ bind:m (poke:strandio [our %hood] %helm-hi !>(message))
(pure:m !>('product'))
|pass [%k %lard %base (sh 'the message')]
Implementation notes:
- Review the commits separately: the first is small and implements the
real feature. The second moves the strand types into lull so khan can
refer to them.
- In lull, I wanted to put +rand inside +khan, but this fails to that
issue that puts the compiler in a loop. +rand depends on +gall, which
depends on +sign-arvo, which depends on +khan. If +rand is in +khan,
this spins the compiler. The usual solution is to either move
everything into the same battery (very ugly here) or break the
recursion (which we do here).
Before this, the %watch to eth-watcher was happening before the %poke,
and so eth-watcher was responding with its entire history immediately.
This is bad because it takes a lot of memory to process that many logs,
and also because those logs are stale.
Now, the %poke happens first, which clears the history.
%kick is supposed to start back from the snapshot and move forward.
Without this, we would only fetch logs that we hadn't already fetched.
Thus, if you were up-to-date when you kicked, you would miss anything
that happened between the time the snapshot was taken and the present,
though you would see things after the present.
Also reverted lull change to make this a safer upgrade.
Previously, the initial Azimuth snapshot was stored in Clay and shipped
in the pill. This causes several problems:
- It bloats the pill
- Updating the snapshot added large blobs to Clay's state. Even now
that tombstoning is possible, you don't want to have to do that
regularly.
- As a result, the snapshot was never updated.
- Even if you did tombstone those files, it could only be updated as
often as the pill
- And those updates would be sent over the network to people who didn't
need them
This moves the snapshot out of the pill and refactors Azimuth's
initialization process. On boot, when app/azimuth starts up, it first
downloads a snapshot from bootstrap.urbit.org and uses that to
initialize its state. As before, updates after this initial snapshot
come from an Ethereum node directly and are verified locally.
Relevant commands are:
- `-azimuth-snap-state %filename` creates a snapshot file
- `-azimuth-load "url"` downloads and inits from a snapshot, with url
defaulting to https://bootstrap.urbit.org/mainnet.azimuth-snapshot
- `:azimuth &azimuth-poke-data %load snap-state` takes a snap-state any
way you have it
Note the snapshot is downloaded from the same place as the pill, so this
doesn't introduce additional trust beyond what was already required.
When remote scry is released, we should consider allowing downloading
the snapshot in that way.
It's too easy to get trapped in the dojo %dy-edit-busy escape room. Just
type something like:
-build-file /=base/gen/ls/hoon
This modifies the dojo output to tell the user how to get out.
Fixes#1462.
Incorporates @Fang- suggested changes (thanks!).
Drops the path serialization as it will print on two separate lines,
and it is already displayed in dojo immediately above the error message:
> =dir /=base=/ge
dojo: dir does not exist
If there were pending-logs in an existing watchdog that was not fully
restarted, and the number of the starting block is newer than the first
in pending, when starting a new thread, those logs will be carried over
to the new thread, which will then be re-downloaded and will fail to be
verified in /lib/naive
