foreign
[Music]
thank you for coming I'm Adrian I work
at open Zeppelin and today I'm going to
show you how you can very quickly build
your first contract with open ziplin
Wizards very quickly a few points about
open Zeppelin you may know us but our
testis now is that there is a trillion
dollar open economy being built on Smart
contracts and we are not the one that
are going to build it you guys the
builders are going to do that through
your dabs through device through
everything but in order to do that you
will need a set of two products and
services that will allow you to do it in
a safe and effective way and that's
where we're coming uh trying to be the
leader providers the leading providers
for for solutions for for that
developers and people in this web 3
space
uh we do that through many offerings or
it's obviously a Defender that I
encourage you to try if you haven't
tried it already for for managing your
contract uh and and also the open the
print contract Library obviously and we
support a lot of network
so last year one thing we did on the
contract team is create the the contract
Wizard and basically so it should be
animated but it's a PDF so sorry you'll
see interaction later uh the contract
with are basically a website that allows
you to bootstrap
basically a lot of contract trc20 721s
Governors we'll see that together and
the idea is to remove as much pain as
possible in the early stage of building
your contract by providing what is
common to everybody what is easy so that
you can then focus on either just
deploying them and building your your
app on top of it or customizing it with
some logic so yeah we don't have much
time so let's just go to a demi so you
know how the network is so I'm just
running a local instance here but you
can get that through
wizard.thensepin.com and for example
today I propose that we both create a
governor Dao that we could all be
participating and our participation in
this Dio will be represented by an nft
so we'll start by building an nft
contract so we're going to take a
nearest 721 contract we're going to make
it mintable and you see the code change
so if you are teaching solidity like
using that is also a great tool for for
for showcasing how like adding features
modifies your contract
so I'm putting the vote module obviously
because that will help us a lot I'm
using roles instead of own ability but
you see that the wizard updates
everything very nicely
and and that's it that's a very simple
maybe make it burnable that's a very
simple uh nft contract so once you have
that you can just copy paste uh download
it but what we're going to do is open it
in remix
and it's also a local instance of
freemix because Network
um and if this one and and here you see
that your your code is here uh it just
got put into into this part here so we
have the file and we are ready to work
on it but we want to do a governor so we
just need more than than just an nft so
we're going to go back to Here and Now
go to the governor and let's make a
governor that is pretty simple with a
current that's at least 10 nft holders
we need to participate obviously we are
going to use erc721 votes we don't want
a time lock but we want to make it
upgradable to your UPS so yeah so that's
a governor that is upgradable and since
it's upgradable maybe we don't want to
have the setting updatable you will
update and to upgrade you do what you
want that's that's just our code so it
turns out to be a pretty small piece of
code but uh if if I had put that like
you see that there is a lot of overall
specifically some overrides that are
sometimes painful so the wizard is here
to to help you figure that out and so
know that I'm happy with my Governor I'm
going to just open that in mix
leave this one remix is a bit strange
but now I should have both files here my
token and my Governor so let's let's
deploy so I'm going to use a local
compiler because authorize
it's not going to work without network
and I'm going to compile this file this
is possibly the longest part of
deploying a contract is actually
compiling it's in the remix in this case
hopefully it doesn't take too long
because I only have three minutes left
okay it's good one thing we could do is
like this is ownable but here we could
just modify that and make it only
governance
so that uh your your great ability would
be managed not by the owner that we can
remove uh but by the by the governor's
Governor itself so this is a good time
for you to like modify your contract a
bits
I hope you hopefully I haven't made any
type on it will compile
again always the longest part yes it's
good I also need to compile this which
is my token so here
and now that this is compiled
yes I can just go here take my token so
my token is here it's on your system 21
I can just deploy it again to a local
instance we're not going to wait for for
girly oh I removed it yeah this is okay
this is my token here uh I've got a lot
of features so I can just take my
address here and paste it into safe mint
to Mint myself one
to three tokens yeah I've got three
tokens uh if you could look at my
balance I've got three tokens I need to
delegate this to myself so I'm just
calling the delegate function and right
now if I go to get votes here you'll see
that my wallet has also three votes so
that's good know that we have this we
are going to deploy the second part
which is our governor
where is the governor it's not here uh
do I need to yeah okay my Governor is
here
uh we remember that the governor was an
upgradable contract so basically what is
going to happen is that freemix is going
to understand that and is going to
deploy first implementation and then the
proxy
which it's great from remix to support
that so now you see that I have to
contracts the governor and this and if I
go there and I just again copy paste the
address of my my account and I see is
the get passed vote where is it
um
oh it's in the view function I've got
the get votes
that allows me to check what were my
votes at block number six and I broke
number six I had three votes that was
after I I delegated that book number
three I had zero votes that was before
my delegation so we're not going to do a
proposal or anything we are out of time
but you could take this put it into
Defender to propose easily from open the
plane Defender you could also link that
to tally so that your user and your nft
holders can vote easily and so basically
in seven minutes we managed
to to deploy an entire governance system
Benson nft and that wouldn't have been
possible without the wizard so yeah
that's what we are very proud of that we
want you to use and yeah and I should
have put the advice the address is
wizard.openzaplin.com
thank you