[Applause]
it was intended to be sort of a workshop
so if anyone wants to at the like sort
of halfway through we'll be doing some
coding if anyone wants to take out their
laptop and try some stuff out if not
that worries but yeah so this the
workshop overview the introduction is
just a little bit of background
amenities for those of you who aren't as
familiar with them a little bit of
background on open seat and then the
second part of the presentation will be
the develop a goal of deploying a
tradable
nft conference ticket with the sub goals
of implanting a simple GRC 7.1 contract
viewing the tickets on marketplace
putting them on sale that maybe as a
take-home task programmatically selling
the tickets using something like the
open sea SDK so how many of you are
familiar with GRC 721 SS majority room
so this is probably just a refresher but
the ERC 20 R represents what are called
fungible assets so currencies and ERC
721 was designed to represent unique or
non fungible digital assets so each one
was associated with a unique
fire and the space of one of the reasons
we're excited about non-financial assets
is we actually think that the number of
currencies that individuals will use on
a day-to-day basis is limited to maybe
stable plans maybe in-game currencies
it's like this but the number of digital
assets that we already use day to day
basis it is very wide so yeah things
like game items things like domain names
include event tickets and then when you
start connecting these digital assets to
the real world you have you know things
like real estate or physical items as
well that could be represented using
this standard so a little bit of history
of GRC 7:21 so 2017 has anyone heard of
crypto punks that so most people so
Krypton Punk's was sort of the first non
fungible asset on aetherium there were
non-financial assets using Bitcoin
counterparty but it was sort of the
first one that you know was the idea of
a crypto collectible and ethereal but
there was no standard around it and what
crypto kiddies did was number one they
built a game around these assets but
they also pioneered the ERC 7:21
standard which was refined by the
etherium community such that it could be
leveraged by other projects so one of
those early projects was a project
called the central and which represented
their virtual land using the ERC 7:21
standard that was in like late 2017 in
early 2018 we sort of had a miniature
cranes around non-clinical tokens that
was a lot more isolated to the early
adopter tech enthusiasts that you know
relative to the cranes that we saw
around ICS and years of 20s but there
were a lot of perpetuity clones like
crypto BOTS crypto fighters and there
were also these games called hot potato
games which were kind of these games
where you would buy a collectible with
the intention of selling it at a higher
price so it's kind of this you know even
more experimental period than we're
going through right now with you know a
lot of scamming projects as well in mid
2018 we started seeing higher quality
projects enter the space so this year
right there and there were a lot are
gods Unchained which is a trading card
game that used the ERC 7:21 to represent
their assets and then MLB crypto which
was actually an officially licensed game
from the Emily that that have these
crypto collectively associated with them
and that brings us to 2019 we're
actually you know it's less of a well
known space in the crypto sphere but
there's actually quite a lot of activity
happening in the NFT space right now so
so a Formula One recently auctioned off
some cars using our marketplace actually
there's a couple of Japanese games that
are becoming really popular there's a
space game that is kind of like EVE
Online if anyone's played that and then
there are starting to be assets that are
not in just collectibles and gaming so
ens is one of those that is using the
ERC 7:21 standard to allow their names
to be tradable so one question one might
ask is like why why is gaming kind of
the leader here so why is this a an
interesting fit for gaming number one I
think gaming is often done like a
digital sort of a playground for any
technology we saw this with the mobile
phone
we saw this with the early internet but
you know there's the shift in gaming
that you know folks are excited about is
this idea that as a game developer you
sort of manage every piece of your
economy you manage the supply of your
items you usually don't allow other
items to be imported into your game
there's nothing really exported from the
game it's sort of this highly controlled
isolationist economy and what's exciting
is that with blockchains and digital
ownership you could have an open economy
where you know you could export things
from the game you could trade them on
open market places you could do all
these interesting things and so this is
kind of the shift that people are
excited about in the gaming community so
a little background on open sea so open
sea is a marketplace or all of these
items so starting with the year - 721
but we recently did a support for a new
standard called 1155 we have around
700,000 monthly volumes they on the
lower side of centralized exchanges but
you know this is volume that people of
this is actual unique digital assets
that are being traded it's not just
token which there is a lot of wash
traded for we also provide an API this
is more of a convenience for wallets
that are trying to show GRC 721 items so
this is used by coin baseball trust
wallet opera and maybe 20 other
different well that's all and then we
partner with a lot of games to build
customized white-label of market places
so this is kind of what open C looks
like the moment you have an D arcy 7:21
item you can put it on sale it's kind of
like eBay trades our wallet wallet so
they never leave your account they're
never escrowed and we also provide a lot
of the functionality that eBay provides
for digital assets so this is the
Formula One car museums actually last
sold for 450
either this is a record sale in NFC
community and you know basically we
provide an interface for allowing people
to do you Bay style auctions for these
items so if if you were to build your
own marketplace on open sea essentially
what you get out of the box is all of
the functionality that's built into the
ONC website every single open sea
feature and you can customize it and I
shall talk about some of these over here
so this is what it looks like for this
game from two space commanders you have
this browser view of your items you can
add rich metadata to them to kind of
control how they're displayed on the
marketplace and then the most important
element of this model is that we allow
the developer of nmt to take a cut of
every secondary sale on their
marketplace so our model right now is
transaction fee based that might change
in the future but we think that there
should be an incentive for developers to
promote their marketplace we also
provide a tool kit for which we'll talk
a little bit about and workshop piece
for programmatically creating
marketplaces so this is a marketplace
created by aetherium which is a trading
card game and you can see that the
marketplace that they've created and the
open sea marketplace are actually
synchronized such that every sale or
every auction that happens on their
marketplace also happens
see it shares the same contracts and the
same order books so a couple examples of
interesting and IT projects to kind of
make some of this a little more concrete
so this is the project called crypto
voxels who here has heard of crypto
voxels okay so not not that many people
and so crypto voxels is a virtual world
where the land is represented as GRC
7:21 and of TS and it actually just
started as one developer and he just
started selling this virtual land and he
sold it at a pretty low price and when
you own this land is kind of like
minecraft you could build things on top
of it so here the other interesting
thing the developer did was he allowed
you to pull in your assets into this
virtual world so this is a crypto
Kitty's museum inside of Krypton voxels
where you can actually go and and
purchase these crypto kitties inside of
the virtual world it's all do a quick
demo
so one one interesting that thing that
this happened is there are now folks who
are curators of digital collectibles and
they have started creating galleries and
crypto voxels to explore these these
artworks so this is a gallery from
someone you know who basically thinks of
themselves as a digital art curator and
it's sort of created this as Museum
another interesting NFT project was
crypto stamp so crypto stamp is an
interesting one because it was actually
coupled to a physical stamp so the
Austrian Postal Service basically
created this line of collectible stamps
where if you purchase one you would not
only get a real useable stamp a lot of
people probably don't use those these
days but you would get a Sam and then
you'd also get a crypto collectible that
you could trade on an open marketplace
and this was kind of an interesting way
to engage an existing community of stamp
collectors in digital assets and we
think we'll see a lot of that kind of
tethering these virtual assets to a
real-life physical asset and then of
course the most recent one is the ENS
project so ENS is a name system for
Imperium so you can think of it kind of
like comms and right now these assets
are tradable as er c720 ones most
recently we collaborated with the ENS
team on doing the auctions for their
short name and so these were basically
names like set eath that were reserved
for an auction system that'll that is
actually currently taking place right
now
all right so I guess any questions about
NF TS or years so 721 before I hop into
the workshop NFC NYC yep what's the
growth you've seen yeah so the initial
spike and usage of entities of those
crypto kiddies and you know you probably
remember these cats selling for like
fifty thousand dollars each and nothing
has you know risen to that level of
market volume but I think that was you
know some extent anomaly in terms of
market volume growth it's sort of slow
but steady linear growth at the moment
so we're seeing we're seeing high growth
in the number of projects that enter the
space we're seeing sort of gradual
growth in the number of users that are
trying them out it's a lot of the same
early adopter tech coders who are like
trying these out and you know it's a
variety of reasons that's the case the
usability scalability of this
[Music]
that's all in gaming pretty much this
tomorrow
it's that of the art and it it's also
interesting but still pretty small I
think like for art the biggest thing is
having a place to display the art so
projects like Krypton box'll isn't
essentially a kind of add that utility
to art but there are there are a number
of crypto artists who have sold works or
you know five the tenth because they
have such a solid reputation in space so
it is starting to be interested
yeah so there was a standard called ERC
998 that did that I'm not aware of any
like easy-to-use tools that allow you to
like button well so we have bundles
which basically allow you to sell a
bunch of entities at the same time but
that's a little bit different I don't
know of any websites at the moment that
are making it really easy to like impose
and I've teased together interesting
projects yeah what do you think mister
have wonderful we can see like most roll
before we see yeah that's like a common
question I think right for everyone in
there you know it's fast it like nearly
every panel specific wouldn't have to do
that
yeah for nf2 use I think maybe a couple
different axes so one is quality of the
games which is steadily growing but the
life site or the development time of the
game is actually typically pretty long
so I think the quality of the
experiences have to be high enough for
people to want to use them and right now
they're just they're getting there but
they're not quite there and then use
just usability of the network in general
so things you know better wallets you
know potentially better blocked chance
for people to build these assets on
existing our site where the game
I think the main thing preventing them
is well I guess a couple things one is I
think it's kind of tricky to for an
existing game to just move their assets
to the blockchain right especially if it
was a really big game and they wanted
the same user experience you know they
could hide away all the theory and stuff
but then you know they're just basically
basically using a really expensive
database for their game um so I think it
I think the games that are most
effective have to be new games and those
new games suffer from the like
onboarding experience of getting ether
some some hide it but then you know you
use everything and then they're kind of
competing with every other game but if
they leverage the blocks you in an
interesting way then you know there are
some like really interesting user
benefits like trading on up apartment
leases
we've seen any adoption from virtual
reality these days or augmented reality
producers not just the games of maybe
even like interest from the
manufacturers of the headsets and such
I'm not sure yeah I
other than the virtual reality projects
I'm not I'm not sure
it seems to be like one company that
they have is that their unique
individually collectively each other
because of my collectibles a little cost
of total production it's really easy for
lots of people to start creating these
and they all just end up that definitely
needs a so weird is where you think the
dynamism is it like
ability to be on i.t because you can't
pick that or other brands like I think
yeah utility and provenance and maybe
some other things but so utility of NFC
in a game right so you know if you can
just if you can with statements like for
tonight right if you can wear a
legendary or the well-known skin yeah
that's cool and you can show it off
that's sort of utility and then
Providence is like oh this was the
officially endorsed Disney collectible
and hence and like Disney has sang she
has said this is a smart contract we're
using there were only be this number of
them I think that it kind of with the
Austrian Postal Service right
not a huge brand but you know they
basically said this is the official
crypto stamp for the Austrian Postal
Service there's only five like red
stamps and those might be valuable for
collectors yeah so there have been a lot
of like swap your crypto kitty or burn
your crypto Katie to receive I think it
was like cryptid strikers that did this
so that is a real that's a really good
point I think a very interesting way to
to engage the existing community is to
leverage like the existing set of
entities right so go to cryptic Cadiz
and say oh now they're useful in this
other game or you can trade them in for
our game asset that's better
yeah and then there's there's also like
NFT airdrops so people like airdrop
promotional and of tea in your yeah
there's like tons of things you could do
it's pretty interesting
have you seen much you seen anybody kind
of use an empties as my assistant
like I have this path set so therefore I
have no rights to do this yeah so
there's the unlock protocol which is
basically sort of a subscription service
that you you buy an N of T and then you
get access to content or something like
that so that's not what they're going
after is they're talking to publishers
that saying it was for that also a Def
Con ticket sold on and upon open c-47s
the other day so tickets they're kind of
a commissioning system right so there's
stuff like that
all right so now digging into the
nitty-gritty so if anyone has their
laptop they can follow along your
thought just watch me to do stuff so
this is the ERC 721 interface it's
basically a lot like ERC 20 except that
the key method is sort of this owner of
token ID right so the token I think of
as for example like an individual crypto
kitty would have a token I do something
and to check who owns that group that
could either you call owner up and then
maybe some of you are familiar with the
idea of proof in the RFU 20 but
basically this is a way for an
individual to say I approve this account
to transfer my item so for exchange is
very useful because you can approve open
and see are actually a proxy but that's
kind of a detail to transfer your items
in the event of a sale so that they
don't have to actually leave your wallet
while they're on sale and then this
transfer from is obviously a really key
one this is basically the ability to
transfer a crypto Kitty or what-have-you
from an address to another address then
the kind of interesting very interesting
part of ERC 721 is you know you have
these token ideas but how do you
actually represent you know what
encrypted Kitty is which is you know has
a name
as an image as the description has to be
some traits so where does that live and
at the moment all of that lives off
chain I don't think there's handling of
a single GRC 7:21 that has put a lot of
data on chain there some funny ones that
put some data on chains but most have
some off chain component that's where
this token URI comes into play so token
URI is basically a way for the ERC 7:21
developer to say this is where you can
grab all the data for my item so this
takes in a token ID and returns a URL so
here's an example of some data that
would be returned from the URL when you
hit it that represents the asset so this
is what's actually one of our test
assets called an open sea creature and
you can see it has a description a image
a name an external URL and these all
mapped to this item right so you can see
the the image this view on open sea
creature is basically the external URL
that you would kind of click into and
then it has these properties which this
is kind of an addition that open sea
made up to allow you to add
rich data to your cigar items but what's
cool is that you know as long as you
implement the token URI and you've
conformed to the year succesfully but
standard you kind of get it all for free
and as you can see like this is
automatically tradable all that stuff
because it is here since definitely
and then what the other interesting
thing is this is also what is allowing
for limited degrees of interoperability
so this is that same of a sea creature
inside of that crypto voxels game that
is mentioning right so now because that
metadata is standardized crypto box hole
or whatever site it can go and pull it
or use those fancy api which makes it a
little more convenient to grab this
assets and display it in the virtual
world and ethers can as well has
actually recently just started listing
all the inventory of GRC seven twenty
ones which i think is that there's an
interesting sign that these are sort of
starting to achieve the same level of
significance as year c twenty which you
know has had a nice either scan
interface for a while we've crypto
awesome he kind of
I think your either display is that any
any kind of control over look at it and
they don't write so they did not need
permission to like check who the owner
of that if he is they didn't need
permission to call the API to get the
data in crypto voxels case they use our
API it's like I'm a convenience thing we
kind of create some data nicely but ya
know they don't question five points URI
right yeah so we'll see if I got the
work for the coding part of this that it
can be changed depending on where it's
hosted so if you hosted on an HTTP
server you know you can't really change
it there's not really good standard
around like you know the metadata is
changing and then everything updating or
I'm just like whole but if you post it
on some decentralized immutable file
storage statement
yep
[Music]
yeah so you could well so before it gets
old can you transfer it
[Music]
oh yeah so um like if I put a sale up on
open sea for example that says I'm gonna
sell this but then I but then I transfer
it somewhere else then that sale will be
kind of cancelled by us or like we'll
keep track of like is a sale valid and
then there's the maybe the more or if an
attack is like transferring it right
before it gets bought
so in that case like the the sale
transaction would fail right because it
would try to transfer something that no
longer is in that account so that it's
an atomic swap right so there's no sort
of scenario we're like in the middle of
the sale transaction something gets
transferred because this is like
watching
so didn't open them do them yeah so if
anyone wants to try out deploying any RC
721 contract
I made a starter repo that Forks are
basic like you know demo repo for folks
who are not technical we we also have a
there's plenty there's tons of ways to
mint entities which I encourage you to
recommend or encourage you to try out so
one example here is a rinkeby instance
of open sea which is basically kind of a
playground for creating enough tees and
you can go in our storefront manager and
like you know actually deploying a
contract and then mint NM tees
there's also in space I think I saw in
the video you midbass which is a much
better tool for deploying
networking here I see yeah and they say
oh it's right there for ya so my base is
like a much more feature-rich way of
deploying interesting entities our
storefront manager just like kind of
this is one of the day was deploying
earlier this morning but you know I'm
pretending that these are being taken
for an FTM I see and you guys for the
non-technical folks you can go to the
development new storefront manager and
sort of go through the process with with
meta mass for deploying a year to 7:21
with like an image and name and
description but if you were so what's
interesting about this is you know you
can deploy a GRC 731 using any of these
tools and they're all like compatible
with each other so it doesn't really
matter you know if you use open C to
deploy it use midbass or if you do it
yourself
and for the developers I'll go into a
little bit of code to show what this
would actually look like
and so this is people go yeah
so very technical so this is a example
tradable ERC 721 token it tradable
you're so sometime token isn't
don't think of it as anything really
special we just added some like utility
functions oh sorry yeah so also my like
linters but the so you know just let
simple way to mint if you go to our
documentation you'll also see some
special stuff we do with pre approving
tokens for trading but basically it's
just an ear see 721 and heritage from
the open Zeppelin PRC 721 full which has
all sorts of nice things associated with
it it has like token URI it has like
easy ways to mint easy ways to burn all
that stuff so it's now I mean it's very
simple to deploy something you know I'm
not a coder but even as a coder you can
do it pretty easily so I will attempt to
so um I won't like trying to have
everyone do it because I never thought
that time but basically you could create
a dot end file and that would sort of
configure all the accounts that you want
to use to deploy your contract so it
also sets up a figure or you can get in
a fury key and inject it in there and
then if you run the minting scripts or
sorry if you run the deployment script
then in theory this will give you a new
yearís at 7:21 contract and one cool
thing is that open sea will actually
pick up it kind of like ether skin will
pick up any new air 7:21 so they're
deployed and so once we mint our first
asset on this year so 71 contract will
automatically it'll automatically show
up but I can see and you could don't
trade it so we go to the contract
employed
in the meantime I can start talking
about the minting scripts
so here's our contract
and so the minting scripts this is this
kind of where the token URI immutable
versus not immutable data storage
becomes kind of interesting so this
minting script I made earlier today and
it basically just uses some JSON storage
site that I found so if we go to this I
just literally just like I just created
a little bit of JSON right so named
hello description hi there I'm in an
image and this is really good enough for
the metadata standard technically but it
to point back there I can go and like
modify this right so if you're trying to
create an N of T that is immutably like
has a mutable image associated with it
it's always the same name etc then
you'll probably want to look into
something like a TFS so that you know
your customers can have this guarantee
that there
don't be changed it seems like most for
usin URLs yep our most liked readers of
MFT s fingertip over the URL or - yeah
so certainly like we have support for
IVFs um there's not that many like nf2
readers they all like most of them use
our API because they're in their early
days like with crypto kiddies there was
actually no token or a standard and so
everyone just had their own like weird
API right like that showed data in some
random and people still deploy your
simply minds without conforming to the
meditative standard so a lot of folks
use our API which is not you know a very
good thing like we don't want to be the
central point
but but yeah if you were building a like
open-source nft aggregator you would
definitely want to support or something
like IVFs so yeah so time for bed
so we do have our GRC 721 contract we
can go on rinkeby
ether scan and check it out
I do that exciting and then we could
admit some items on here so don't worry
this like stuff is not
go away and
so I'm gonna replace this address here
and then hopefully if I run the minting
script it'll meet some items with that
metadata that I showed you
and after it's done that you can view an
item on open sea if you just use a
little bit of URL wizardry by hitting
slash assets slash address slightly
token I eat I think good to wait for it
to deploy so it has minted an item
and so it has meant it took an ID number
one and now we can go to rinkeby
slash one and hopefully it shows show up
yeah so that's the image I use it was
called hello and then some other
interesting things you can do here are
you can immediately put this on sale
both through the open cui or
programmatically through our SDK you can
sell it in a different token on on main
that we support stable point sounds like
that on test night we use it for this
test token you could create sort of a
Dutch auction where you started at a
certain price ended another price you
could create a private sale eBay style
auction you can bundle it together with
other entities any even from other
contracts and things like that
so there's all these things you can
immediately do with it and you can see
the history for it so it was born a
minute ago to my accountant and lastly I
think I'm running out of time
you can configure this so you get a free
storefront so deployed a lot of
contracts called creature but assets
slash creature - 49 and you can actually
edit this storefront and what's what's
interesting here is we use the ownable
owner of the contract to permission who
can edit their storefront so I gotta
edit storefront
I can add a image for the storefront and
description and then my marketplace fees
which are basically whenever something
sells I'll take that a cut of the sales
to group a payout address and a little
bit around how the items are displayed
any any last minute questions
all right thanks so much
[Applause]