[Applause]
so here's talk about spark on Texas
service earlier better title would be
smart contract might remember services
so my name is broken silica I speak
basically in everywhere on the internet
I am the co-founder and CTO at fission
where we're building a such a
decentralized firebase with user control
data or not about three jobs or a
dependence of about three it's all about
three tuck underneath so that people
don't have to worry about learning all
of a sudden super system in two seasons
I used a little bit of Sapa I love it
here and so it to be back I'm so happy
when I saw that I was going to be here
and have a chance to sit again I'm a
programming language theory and person
she an enthusiast and I used to do R&D
full-time on a grant basis but these
days we're doing primarily desktops when
listening from I had less in the
services land I'm the co-author of a
number of yeah he is including the
emails or taste attack jobs which we
hope to get into this artwork that
didn't happen but there's a resurgence
of interest so maybe that'll happen soon
and also the other ones really didn't
know here's Tennessee six which of the
most often will be on the stack standard
US house goes for
mutation in if they're in classic lamp
or the studying further over as well
this is 1050 the other thing to note
here as well is this event you know in a
lot of other standards so people the
situation understand there's going to be
a penalty 1,400 secure children's use
this as a dependency as well so this is
already finance way out into industry
refuse material regulation Sarah last
night I hope use Twitter and saw this
tweet so it sounds like there's
interesting getting with this I embedded
directly in my career in solidity and
doing on training translation reviews as
well which we have people contact code
for on github so let's talk about
whether contracts
so the goal of this project broadly is
in three parts first write your lines of
code we are going to write the more
lengthy or to introduce about it's also
a gentleman I'm testing expensive to do
occasionally etcetera so you can have
higher confidence in code that lives
munching they do call into that has been
audited by say Boston or consensus
diligence and isn't signed off and the
community understands how it works and
last goal is to make theory more
accessible we have your semantic codes
now that can eat understood you can
build up the flow of East Coast through
the contract through web of contracts or
probably come back out to a user and
then translate them into human readable
language which times winning and we may
take a look at at the very end high
level idea just kind like how on the web
we have satisfy those that came along
with every request like a floor to floor
we should have these as well for
Starbucks right especially automated
behavior or react to things in a smarter
or contextual way than just to our halls
or having some custom response type for
every request and the other nice thing
because this is it all fits into a
single bite which means very very
portable is that we can do things across
different chains if we have
occasionally with the et CET HP's bridge
and cross our communication with me too
so obviously this draw a lot of
inspiration from you then HTTP and the
actor model what's all these things home
incoming composition we want to have
contractor come visit shouldn't rather
than taking existing contract anything
in a bunch and hoping that still roughs
the way that we have students before
right even if you have a fully audited
library and then you go audits and
deploy it you've broken a lot of the
core assumptions you have to get me out
of it
in theory it's a shared system why are
three leveraging each other's code why
do we have 15 million years to 2012 B's
and so most of that logically counsel
into single contract and if we can build
these high value of highly use contracts
as they're always make money doing that
so on to many services something you
know a little bit like this where you
can count contracts come to contracts
that are all fairly lightweight and thin
and do single thing yeah it was
basically what I just said some apple
core technical idea so today you deploy
since our contracts especially some of
my chain that they're pretty much silent
system you'd employ one maybe two or
three contracts and they talk to each
other in some special way and it'll
really talk to each other right so we've
grown the shared system but we really
fell into a small mini blockchain see
some are watching and you know sometimes
sure maybe they do talk to another like
maybe that's what took it ease and you
know you're falling into it but for the
most part they're just kind of there's a
lot of duplication and a lot of things
being redeployed onto the channel all
the time
so what we can break those barriers and
call tuna so in this case the two
multicolored ones here are you know
secure verify on chain services they can
maybe talk to each other and other
contracts can talk about as well use
them as proxy publish them for
authentication or to do some juicing you
know computation deal of difference
cetera so what these folks actually look
like as I said before they are a single
byte and if you've read about it how to
get a nibble
so the just say how in HTTP you have say
492 our 200 range we hadn't saying that
they are flipped around and that's
mainly to make it easy to decompose them
programmatically so here is 0 X or Y the
first 4 bits right the category the last
four risk or the reason
and if you have something where the
caliber is 0 this is the same case is
having or 100 in HTTP but it just tells
you that this is a user generated or
user sign error pointer with no
additional context so this one just like
that you know so the sheriff takes for
the reason
this rates going into mini table so it's
actually more charging this is all odd
numbers
our success among even numbers are
failure so the callings are categories
so things like time logic or
authentication or negotiation governance
even of change those are captured on
here and the rows are really so you can
say for example we have the two row
which is searching and matching and
waiting and together we guess that
you're awaiting a match
so both we can do this you'll read that
note decompose them you might have to
memorize 16 by 16 so 32 and that's why
we memorize the whole 256 good space
there's a helper library as well on NPM
is lets you write these in a more
general way and process them more
programmatically a little bit more
information out of them so here are some
emails for February reason that you can
then stick together pull apart and
you're just going to also say like you
know this needs to be category four and
one of the following reasons for example
and you can also automate reverting this
also reverse are built right in full
supports in this case this require okay
says it needs to be a Ottoman otherwise
it will reverse when it responds back
with a hardwood message we can also
allow any messages as well with
localized won't change my station which
again
the end so a toy flow for contract
messaging so we have 3d three players in
the scenario we have a user this the
robot may be a proxy contractor engaged
themselves to intermediary and then a
token we ask for sending my request
I dropped it across and sashes that was
something you know this this drops he
asks for a by and this amounts but every
consummate you know we're not ready yes
but we will pay you back when we're
ready
it's just all Unchained I'm not waiting
for events or anything on you know
keying it pulling it with the server or
staying open when I'm ready
proxy hold on to that and then probably
guess that that hurts the user
sometimes my user it gets gets
interesting as it is this done yesterday
saying you know it's done yet spend says
you know I don't have to go and check
luscious perverts preparedness this
transaction ever happened and also know
sometimes later we come over there is
maybe were
actually watch the thing and it says
ready you know are you still interested
and yeah I mean time I kind of much
worse come in rates less before that
that's a really completed and probably
assess the user distancing discussing
recently about adding messaging like
this you know an inbox or while you were
away from the chain to the chibok chain
or into wallets rather and then we can
then propagate that into that system
school or stateless service contracts
against Ivan Bishop library code either
actually before if you override
functions on a library you just guess
women absolutely library they say you
know it's been all I'll check - no I'm
good and then it starts overriding
methods that audit you no longer wolves
he may have broken something he made a
small change like changing the name of
the token that's probably fine I see
start taking behavior a few notes if you
deploy these on chains that people
high-value components we're doing things
with finance and criticism installers
then we've met use as a community
verified and checked and then they live
on chain and don't get changed so we
know that this is the exact code that we
expect why not interesting I'm not
really play safe out safe and this gives
us so much
it's intractable because don't feel
cheap and a call out is more expensive
but for anything more involved that's
effectively so here's a simple toy
example so we have a token which is just
the things that do normally override
calls out into a stateless your 20 makes
requests well you have you're in the
range to do that and then we can check
with say here's the number two is the
distress were restricted and is saying
actually this the person trying to
transfer students the bands love to
transactions were a few things out into
reusable components that neither to even
be which will look at annoyance a you
know a pricey service let's say it's but
you don't have to give us the in each to
our contract you can just send that out
to another another service provider
which is a staple service contract so
sometimes it's not the behavior that's
deeper than smart contract with the data
inside us and calling into that might be
valuable not just that you don't have to
you know okay let's see users running
her purse hoping basis but so that's you
have to do that all you worry about is
amazement kose once they're good to go
so in this development okay
it checks upon these halloweeners of
thinking a message and it's actually a
real-world scenario from
so we have prosper or trade each pain
Canada and South Korea and they both
have different regulatory requirements
and you need to be able to match both of
them and this requirement sometimes
change so you need to be able to keep
just call out to a contract rate the
independent logic is is kept separately
so you call upstream money comes back
and says yes you know you're in the
meantime they're about to expire don't
worry about checking this other service
now because we don't mean to check for
override they're actually you know
they're they're okay and then we each
other the other regulator which calls me
to do some some database you know we get
back yes
you know they're in the database
probably a more specific error for this
use case so doesn't have to probably get
the exact same message we can change it
as we go and then come back with yes
some quick thoughts on making money with
this so it's a thick you camps or that
people aren't charging for a bunch of
calls today you can in people are as
presidents don't have any more often
especially with I've heard fairly
recently that state rent is now not
happening but it's not entirely a
terrible idea in collecting things off
chain or getting things off chain that
hard to use very much or I don't know
high value so in the money like this we
makes sense to some degree where you
collect value to prove that you are
valuable but even without us we can
support the development efforts of high
quality good Ottoman and pay for the
auditing of these shared smart contracts
so that's we have a better oil secure
chain overall rate of benefits everybody
and welcome to try to be the luminous
because we're not anywhere saying ultra
mystically please get us audited and put
it on chain we're saying we'll get us
audited and put it there and we will
recuperate that initial investment
so the Mississippi Valley all different
ways you have permutations rhythm you
know like a tomatoes - I'll charge which
is mostly what you see today
warning violence doesn't change this
might be pro contract or prefer per
provider even buying a subscription
model may have permanent okay for
certain number of calls or certain
number of blocks let's say it's a girl
okay for the next month I have three
minutes to get through the user
localized feedback parts so this is
something that we were talking to if you
alternate integrating but know that
madam asked has a system which
we heard about yesterday this might be
something that we can just implement
ourselves so Unchained localization
improve back one here so we have a
localization preferences single table
one chain which actually exists and then
localization for these 256 codes that's
a reasonable number to get translated we
have first translations and it's through
the concept in English Spanish and
pirate and to get more as a zombie have
a couple partial translations other
languages not the whole booth set yet so
if they're going to successful oh you're
a Japanese speaker and you want to
interact with this contract through a
wall that's it's a transaction it does
something and returns back so soon and
now we're done right this is come back
in the response we don't have to pay for
the rest of this because is truly a read
so we go to the translations contractor
there forever essentially look up the TX
origin transactional urgent user and
look at the role for them which says
that they want Japanese they grab the
text 411 return the text back up and
display it and Eli Loker overflows
management really earn in certain are
putting strange River we can do a lookup
and then reversed so similar flow maybe
we send the transaction and then this
contract that needs to revert so we're
gonna revert with fluoro we hook up the
text from out again look at the TX for
Jimmy grab the text and probably get it
back up and we'll show like that so I as
the developer don't have to write all
the transitions myself they exist people
can register their own and then say you
know I would use this translation for
all my messaging right if you want
etherium totally widely used and
accessible to everybody like my check
grandmother doesn't speak English we did
a quick analysis of why are the reverts
rating in on chain and they're
predominantly English like like
overwhelmingly with a bit of Chinese
right so that's to really hold her much
and
we can absolutely get that get that done
yeah probably
like that and that's all for me thank
you
[Applause]
you