►
Description
Visit the https://archive.devcon.org/ to gain access to the entire library of Devcon talks with the ease of filtering, playlists, personalized suggestions, decentralized access on Swarm, IPFS and more.
https://archive.devcon.org/archive/watch/6/remix-intro-workshop-en-espanol/
Remix IDE is the tool that most people begin with for their journey through Ethereum development. Come learn some basics of Solidity, the most popular language for programming smart contracts. We’ll be using the tutorials inside of Remix - so you can continue working after the workshop is over. The workshop will be conducted in Spanish.
Speaker(s): Moritz Stellmacher
Track: Developer Infrastructure
Keywords: Solidity,Ethereum en español,Remix
Follow us: https://twitter.com/efdevcon, https://twitter.com/ethereum
Learn more about devcon: https://www.devcon.org/
Learn more about ethereum: https://ethereum.org/
Devcon is the Ethereum conference for developers, researchers, thinkers, and makers.
Devcon 6 was held in Bogotá, Colombia on Oct 11 - 14, 2022.
Devcon is organized and presented by the Ethereum Foundation, with the support of our sponsors. To find out more, please visit https://ethereum.foundation/
A
Hello,
welcome
everyone.,
My
name
is
Hugo
chái
and
today
we
are
going
to
do
a
remix
workshop
and
it
is
for
web
street
beginners
and
they
are
going
to
learn
a
bit
of
solidity
with
remixes.
And
yes,.
We
are
going
to
do
that
today,
but
before
we
start
we
have
some
links,
I
think
it's
a
little
easier
than
you
have
it.
If
you
go
through
that
link
here,
Well
there,
it
is
like
a
cuaco
or
also
the
links
that
you
can
use
it
And.
A
So
it
will
be
easier
during
the
presentation
that
you
can
see
it
and
you
can
It's
just
that.
You
have
to
click
with
it
and
you
don't
have
to
do
it
So
if
it
continued
Well.
If
you
do
that
now
and
then
we're
going
to
do
how
we're
going
to
make
an
effect,
and
for
that
we
need
yours
and
you
have
to
install
metamask
and
then
change
Network
optimism.
And
then
you
can
share
your
address
here.
A
So.
We
can
do
it
to
you,
So.
You
can
paint
the
nft
and
you
can
also
give
it
a
bit
of
is
so
you
can
do
it
in
optimism.
So.
If
you,
before,
during
I'm
planning
and
making
the
presentation
you
can
go
here
and
when
you
have
the
meta
plus
you
have
your
address,
you
can
just
put
it
here
and
well:
And!
That's
fine!
If
you
do
it
now,
So
later,
we
don't
have
to
wait
for
all
that,
like
this
I
hope.
A
A
A
A
Maybe
it's
less
than
30
minutes.
Let's
see,
Well
I
think
you
all
know
at
a
high
level
why
we
are
here,
but
for
me,
and
because
I
am
here
and
because
I
think
that
is
such
an
important
thing,
I
like
to
put
it
Like,
just
in
a
few
words
to
condense.
What
is
the
thing
that
is
so
important,
and
the
thing
that
is
important
to
me
is
that
blockchain
technology
allows
us
to
dawn
data
in
an
imme,
utable
So.
A
It
may
be
that
we
have
data
in
the
form
that
nobody,
nobody
can
change
it
Nobody
can
it
can
take
it
out.
Nobody
can
do
anything
with
it.
And.
That's
I
think
the
important
thing
that
a
lot
of
people
don't
just
don't
fully
understand
what
it
means,
because
that
what
that
means,
I
think
that
this
is
going
to
be
the
one
very,
very
big
thing
that
is
going
to
change
everything
almost
like
30
years
ago.
If
you
told
people
that
the
Internet
is
a
place,
people
can
communicate.
Also,
nobody
knew
what
to
do
with
it.
A
So
that
It
is
that
one
thing
that
we
have
data,
that
Naruto
can
change,,
that
is
very,
very
important,,
and
there
are
going
to
be
a
lot
of
things
that
can
be
done
that
nobody
can
handle
at
the
moment.
Well,.
The
illusions
that
we
have
are
very
centralized
in
all
of
them.
We
know
it
as
Facebook,
Google,
Amazon,,
all
these
likes,
always,.
If
not,
it
was
not
possible
before
to
have
data
in
a
way
that
nothing
could,,
nobody
could
change
it,.
There
were
always
people
who
could
change
it
at
some
point.
A
A
Like
each
one,
It
has
like
a
copy,
a
floor
of
the
copy,,
and
so
it's
very,
very
difficult
to
change
something
there,
you
can't.,
Well,,
yes,,
yes.
We,
want
to
know
a
little
more,
as
if
the
history
of
that,
how
it
changed,
is
that
blocksen
technology
was
invented.
like
a
ledger,
a
letter
for
which
are
the
typical
transactions
in
the
idea
era.
A
Now
it
is
like
the
revolution
is
that
it
is
not
only
used
for
transactions,,
not
transactions
of
a
currency,,
but
it
is
used
for
programs,
not
for
intelligent
programs,
and
the
data
is
stored.
There
And
also
the
programs
And.
That
is
the
thing
that
is
not
that
now.
The
important
thing
is
the
thing
that
changed
and
with
that
the
la
and
Silvio
is
allowed
to
create
a
lot
of
applications
that
could
be
done
there.
You
drown
like
how
Blockchain
now
is
not
only
for
coins
So.
A
There
were
also
coins
like
in
2020
17,
like
there
was
all
the
Oh,
yes
I
and
all
the
people
uploaded
their
copies
in
coins,
no
And
that
could
be
the
people
can
do
it.
The
cool
people,
but
also
They,
can
do
a
lot
of
other
things,,
such
as
social
networks
and
tokens,,
that
in
that
year,
the
nfts
that
started
that
year
last
year
were
very,
very
big,
no,
and
all
these
applications
is
that
they
can
be
to
do
with
isirium,
and
it
is
much
more
difficult
to
do
it.
A
A
If
they
can't
connect
via
WiFi
I
think
the
WiFi
key
is
already
there
So
If,
you
have
a
problem,
I,
think
that
works
well,
OK
Well,
yes,,
but
that's
the
decentralized
application
and
I
know
that
they
are
built
on
the
blockchain
and
at
least
how
it
has
the
Smart
Contract
as
an
intelligent
contact.
And,
that's
what
we're
going
for
and
that's
what
We
are
going
to
see
today,
how
we
can.
A
Write
our
own
Smart
control
to
start
with
that,
and
then
there
is
a
user
interface
that
people
can
interact
with
that
Smart
Contract
and
here
is
a
structure
or
how
do
you
know
if
you
are
from
web?
You
from
the
old
world
from
there
How
is
the
a
little
is
how
they
can
it
a
little
easier
to
understand
how
it
works.
So
if
the
Front
in
we
start
here
like
no
ordinarily,
you
have
like
a
decade
now,
you
don't
have
all
all
your
data
And
again.
A
It's
who
Google,
Cloud
or
Samsung,
have
it
in
yourself
from
Maybe,
but
in
the
diet
structure
you
have
it
in
the
blockchain
Or
at
least
the
data
that
is
very
Sensitive.
Data
is
very
important
because
it
is
very
expensive
because
you
have
to
think
about
what
data
you
put
where
not,
and
that
is
why
the
most
important
data
is
put
in
the
blockchain
and
then
in
the
non-normal
ep.
You
have
the
code,
you
understand
where
you
can
run
the
programs
in
the
server
and
now
the
difference
is
here.
We
have
the
Smart
Controls.
A
The
smart
contacts
that
are
now
are
those
are
the
not
only
also
for
functions
that
are
important,
but
that
is
like
in
programs
that
cannot
be
changed
and
that
are
executed
on
the
blockchain.
And
then
you
also
have
the
background.
Is
that
normally
it
is
almost
the
same,
but
there
are
some
libraries
like
industries
that
we
are
going
to
use
today,
also
a
little
that
you
can
With
what
you
can
connect
with
the
blockchain
and
with
How.
A
It
is
as
if
you
had
an
idea
and
you
can
communicate
it
with
the
data
you
have
in
the
Smart
Contract
in
the
functions
you
have
in
the
Smart
control
Well.
Yes,
that
is
the
structure,
and
we
are
going
to
look
a
little
at
Smart
contacts
that
Smart
control
today,
Well
and
now
for
the
end
of
this
presentation.
We
are
going
to
see
what
are
the
attributes
of
the
days
that,
because
there
is
that
I
know
that
they
are
like
cases
where
yes
Where.
A
Would
it
be
good
to
create
a
10
or
in
which
case
it
would
be
better
to
create
a
traditional
ep
then?
Well,
you
have
to
know
that
they
are
normally
transparent.
So
people
can
see
they
can't
you
too.
The
data
can
be
in
code
and
you
can't
send
all
the
data
in
nail,
but
people
can
or
see
how
how
the
contract
works
and
what
transactions,
what
transactions
people
did
are
very,
very
transparent,
which
is
different
than
normally
when
people
only
have
their
episode.
No
one
knows
e
what
happens
with
the
data?
A
Nobody
knows
how
people
interact
with
it,
and
nobody
knows
if
not,
if
not,
they
didn't
give
the
data
to
other
people.
So
for
all
these
things,
that
could
be
a
case
where,
where
it
would
be
good
a
while
ago,
because
because
it's
transparent
and
also
what
is
also
interesting,
is
that
a
lot
of
people
like
get
other
people's
code
and
interact
with
other
people's
contacts
that
makes
it
very
interoperable.
Not
so
many
people
can
interact
And,
that's
because
they
are
transparent
and
other
people
do
You
can
use
it,.
A
It's
not
that
each
one
has
it
on
their
own
server
and
nobody
can
use
it.
Well,.
They
are
transparent
and
later,,
and
that
is
possible..
The
most
important
thing
is
immutable,.
It
cannot
be
changed.
Well,,
it
can
be
changed
if
you
write
it,
what
it
is
upgrade,
so
yes,
it
can
be
changed
there,.
But
if
you
didn't
intend
to
change
it,,
you
can't
change
it
either,
and
that's
what's
interesting,
that
now
people
are
sure
that
it
won't
be
changed,
and
It's
like,
and
it's
how
it
was
written.
A
That
is,,
if
it's
not
like
a
blockchain
where
someone
computes
it
airgex,,
but
that's
going
to
be
immutable
and
people
can't
change
it
and
that's
the
other
thing.
That's
interesting,,
maybe
also
in
countries
like
here.
Yes,
yes,
many
times,
people
do
not
know
if
things
are
going
to
change
or
someone
is
going
to
pay
for
it
or
something
like
that
there.
A
If
you
have
you
have
your
own
or
something
like
that,
no
So,
you
have
to
think
about
when
to
use
it
and
when
not
good
Yes,
that
is
more
or
less
the
theoretical
instruction
and
I
do
now.
We
are
going
to
go
to
the
introduction
to
solidity
or
I,
don't
know
if
anyone
has
comments
or
questions
on
that
part
in
u
na.
A
Great
care,
part
and
part
I
don't
want
that.
It
would
be
the
best
that
only
parts
that
have
that
have
sensitive
data
These
are
the
data
that
must
be
handled
by
the
blogs
in
all
the
other
data
that
I
don't
know
with,,
they
are
only
like.
No,
that
everything
makes
the
experience
better
for
these
data,
no,.
It
is
not
necessary
to
put
it,
only
the
data
that,
yes,
they
are
very
sensitive.
How
I
don't
know?
Yes,
they
are
very
sensitive.
How
about
finances?
I
don't
know.
A
Yes,
you
too,
another
thing
that
can
be
done
is
that,
just
as
you
can
create
like
an
esh,
you
can
get
fat
So
people
know
that
it
hasn't
changed
the
data,
but
also
you
don't
have
to
put
all
the
data
inside
So.
It's
just
like
you
can
know
if
something
has
changed
and
no,
but
you
don't
have
to
put
everything
So
if
you
have
to
be
a
little
sensitive
ble
with
that,
but
they
are
also
all
are
working
to
make
it
a
little
faster
good.
Other
questions
comments.
A
Yes,
Well
I
think
that
those
would
have
to
be
something
like
that.
No
that
it
would
have
to
be
something
that
Aaron
is
people
think
that
it
is
so
so
important
that
the
data
is
that
the
data
is
safe
and
giving
it
can
change,
and
it
had
to
be
such
an
important
thing
that
that
people
also
don't
Or
that
it's
also
fine.
A
Maybe
God
I
know
because
I
don't
know
if
people
are
going
to
use
it
or
not,
but
it's
how
it
has
those
traders
it
has
to
be
because
of
the
way
it
's,
transparent
and
changeable
But.
On
the
other
hand,
it
's,
chaotic
and
slow-
and,
yes,
you
have
to
know
see
when,
when
it
will
be
the
one
decision,
and
so
far
more
than
there
are
the
tones
all
the
finance
applications,
not
that
they
are
that
people
like
because
there
it
does
make
a
lot
of
sense,
that
the
data
is
immutable
and
also
transparent.
A
A
Other
There
are
a
lot
of
ideas
that
can
be
done,
but
if
it's
a
little,
nobody
knows
if
it's
going
to
work
or
not
Well,
now
we're
going
to
go
to
the
introduction
and
for
that
and
well
I'm,
also
here
with
the
remix
team,
because
there
are
also
very
good
t-shirts
here:
I
don't
know
where
they
are
there.
It
can
be
Yes
and-
and
we
can
use
remix
too,
which
is
like
the
way.
Almost
all
the
people
I
know
who
entered
that
space
used
remix
at
first,
because
it's
an
ID.
A
So,
well,
you
see
everything
you
do
if
you
can
call
it
fun
tions
from
within
only
with
a
tie,
and
it
is
all
very
very
easy
and
we
are
going
to
use
remix
now
to
learn
in
solidity,
and
there
is
also
a
module
called
learned
and
with
that
we
are
going
to
some
tutorials
and
we
are
going
today.
We
are
going
to
see
those
tutorials
and
that's
why
you
can
go
here
or,
if
not.
If
you
already
went
to
that
at&t
there,
you
have
to
press
that
link.
And
I
hope
that
the
page
speaks.
B
A
A
A
If
here
is
how
there
are
different
plugins
and
that
is
Monday,
and
that
we
are
going
to
use
it
with
that
dipling,
you
guys
I
hope
you
go
directly
to
that
learning
request
for
beginners
tutorials
So.
It
works
with
everyone,
Yes
good,
then
maybe
I'm
going
to
sit
down
now,
let's
see
at
the
beginning
the
basic
syntax.
That's
where
we're
going
to
start,
and
here
there
is
always
How
some
missions.
A
A
A
A
A
Ok,
it
worked
with
the
other
wi-fi.
Some
people
still
have
problems
After
a
while.
Maybe
it's
fine
and
everything
is
fine.
Ok,
So,
I
hope
everyone
is
fine,
Ok
good
And,
if
not
Yes.
You
can
also
see
it.
You
can
see
my
page
here
and
then
maybe
you
can
go
here,
water
with
other
people
and
see
blessings
together,
OK
But,
we
are
going
to
start
I
hope
you
can
see
it
well,
OK
Well!
Now
we
are
going
to
see
at
the
beginning
how
that
is
the
Hello
World
contracts,
not
the
contact.
The
initial
program.
A
A
A
Here
is
the
link
for
the
hekend
not
again
the
last
time
and
if
not
capable
that
other
people
here
can
ask,
and
they
can
give
you
the
link
And
if
they
have
that
van
here.
It
will
look
like
this
and
they
can
put
their
address
here
just
by
editing
the
day
here,
and
here
they
can
po
ner
and
from
there
they
are
They
are
fine
for
now
and
we
are
going
to
use
that
later.
A
Ok
And,
if
you
have
problems
here,
you
can
also
ask
some
information,
people
who
have
already
done
it,
but
I
hope
that
everything
worked
for
everyone
Ok
and
now
now
the
theme
of
lions,
too.
You
will
find
in
that
at&t
only
that
link
had
to
work
if
it
doesn't
work.
The
alternative
is
that
it
will
only
go
to
remix
and
from
there
you
can
activate
the
plugin
here
on
Monday
and
from
there
you
can
import
that
group
and
well,
it
depends
on
the
wifi
it
had
to
work,
and
there
it's
called
solicity
for
beginners
And.
A
Ok,
if
you
have
problems,
maybe
other
people
here
can
help
you
or
I
can
also
make
a
pause
when,
when
we
finish
that
so
there
after,
when
I
go
when
we
finish
that
contact
after
that
it
goes
to
be
a
small
mission
and
you
can
work
on
it,
and
people
who
have
problems
can,
let
me
know,
OK
Well.
We
started
with
that,
like
Hello
Wells
So,
it
is
the
contact
very,
very
simple
for
you
so
that
you
already
understand
the
basic
syntax,
not
at
the
beginning.
A
Here
we
see
the
license,
no
What
license
does
that
contact
have,
and
that
is
not
so
important
per
hour,
but
here
they
also
have
licenses
that
you
can
see
which
one
is
good
for
you.
But
yes,
They,
start
now,
no,
that
won't
be
very
important,.
Besides
you,,
you
license
one
that
many
people
use.
Well,.
If
they
don't,
they
don't
have
it,
it
's,
not
that
bad
either,,
but
they
will
have
a
Warning
here.
No,.
It's
not
a
business.
It
would
be
good
to
have
like
one.
license
here.
A
I
don't
know
in
English,
although
it
tells
us
that
we
are
going
to
use
a
version
in
8,
8.3
I
leave
you
8.3
or
higher,
but
not
more
than
9,
and
that
is
why
we
have
that
little
ceiling
here,
because
with
the
big
changes
like
9,
which
is
tá
empty
I
had
there.
Yes,
they
are
changed
as
things
that
can
be
broken
and
that
you
can
buy
the
contact
and
that
it
will
no
longer
work.
If
you
use
with
an
older
sentence,
I
see
with
the
as
if
there
are
small
changes.
A
If
you
have
4
and
5
nothing,
there
they're
going
to
hit
you
more
So,
yes,
we're
going
to
aritziar
now,
but
stop
with
paella
And.
On
top
of
that,
other
people
want
to
use
the
program
and
request
if
it
changes
very
quickly
so
to
know
what
the
creation
is
like
this
time
to
write
it,
we
have
to
define,
we
have
to
decide
which
version
we
are
using
water
Well.
Then
we
have
here.
A
The
keyword
contracts
is
not
like
the
intelligent
contact,
the
Smart
control
as
the
name
of
the
program
that
we
are
going
to
write,
and
if,
with
that,
we
initialize
it,
and
then
we
give
it
a
name
and
Normally.
It
is
created
no,.
You
don't
have
to
capitalize
it,
but
it's
like
a
good
practice
and
we
call
it
elowell,
because
it's
the
beginning
of
the
program
and
the
beginner
program
for
you
and
And.
A
If
that's
the
name
and
a
is,
and
then
here
we
have
the
program
that
the
Smart
contracts
m,
which
is
very,
very
simple,
and
there
we
see
here
we
have
a
variable
and
the
variable
that
we
can
see
a
little
later.
What
it
means
is
an
m
State
verble,
a
State
variable
And.
That
means
that
that
variable
I
know
the
value
of
that
variable.
We
are
going
to
put
it
in
the
blockchain.
That
is
going
to
be
something
that
you
are
going
to
that
goes
even
in
the
blockchain
And.
A
We
have
that
variable,
and
then
we
assign
a
value
to
that
variable
and
the
value
is
that
it
is
a
String.
Not
that
It
is
that
they
can
be
seen
here
very,
very
easily,
and
we
also
have
to
say
what
type
that
variable
is
and
because
we
know
that
it
is
a
String
we
put
here
the
type
that
is
String,
then
there
is
something
new
here
that
is
visibility
And.
In
this
case
it
is
in
public,
which
means
that
we
can
access
it
from
outside
contact
later.
A
A
Ok
well,
here
is
a
possibility
that,
before
we
are
going
to
see
the
mission
that
you
have
only
for
you,
you
can
also
use
it.
A
little
is
that
the
one
that
is
the
good
thing
about
remix
It's
that
I'm
going
to
teach
it
a
little
bit,.
So
here
is
the
file
explorer
and
now
we're
all
in
the
tutorial.
So.
Now,
that's
not
so
important,,
but
later
we'll
see
how
they
can
create
new.
A
Programs,
new
solidity,
files,
or
also
you
can
do
it
well,
there
would
be,
and
well
all
these
things
you
can
do
here
in
the
file
explore
later
here
is
the
compay.
Now
we
can't
compile
it,
but
it
can
also
be
done
with
control,
and
that
is
if
you
want
to
compile.
The
contact.
Like
solidity,
is
the
hailer
a
language
highlavel
and
after
that,
what
is
in
the
blockchain
is
the
bitcoot
here.
What
does
compayla
do
and
with
that?
A
We
also
know
if
we
have
some
problems,
but
it
is
not
that
important
For
now
and
later
here
we
have
the
tap
bodyploy
and
transactions
And.
We
are
going
to
use
that
later,
but
now
I
have
a
Machine
as
a
version
of
blockchain.
That
is
in
my
browser
that
I
can
use
And.
That
was
done
here
and
now.
I
am
going
to
deeploy
to
put
the
contact
in
the
blockchain
of
my
Demi
brother,
just
by
pressing
That
button.
A
Diploe,
and
here
is
the
contact
in
my
blockchain,
and
here
now
you
can
see
that
we
do
not
have
a
function
to
return
the
value
of
Great,
but
it
has
But.
We
have
a
button
here,
not
the
rest
And.
That
is
because,
if
we
have
Public
visibility
with
State
betters,
we
also
automatically
have
that
function.
But
that
is
not
so
important,
for
you
can
see
that
we
can
interact
with
that
contact
very,
very
simply.
Well,
that
is
not
so
important
for
now
and
later
we
will
come
again
for
that's
so
Pau
until
I
start.
A
Here
we
are
Okay
now
that
I
hope
you
understood
all
of
this..
Here
is
a
mission
that
is
for
you
to
vogue,
the
contact
that
and
you
created
your
same
new
contact
that
is
now
called
Hello
roads,
but
is
called
myconstrict
and
also
the
variable
is
no
longer
called
grid,
but
It's
called
name
And,
that's
important,,
it's
not
name,
but
it's
name,
and
also
this
Twin
type
and
we're
going
to
teach
it
a
value
that
is
he's
the
one
again
and
well.
That's
that's
Paola's
mission
for
you
to
learn
it
and
it's
very,
very
easy.
A
A
A
A
And
saving
errors
So,
we
are
good
if
this
is
how
it
had
to
work.
If
not
I
should
have
a
problem.
Well
I
hope
everyone
is
ok.
So,
let's
go
to
the
next
chapter,
Data
types
primitives
So.
Now
we
know
how
to
create
a
contact
very,
very
easy,
and
now
we
are
going
to
see
primitive,
datas,
very,
very
primitive
water.
Only
and
the
address
address
the
Heroes,
maybe
that
you
do
not
know
it
yet.
A
Here
you
can
see
how
a
lot
of
contacts
that
diff
and
all
those
contacts
And
what
we
do
now
is
we
go
through
these
contacts,
but
with
a
little
more
explanation,
but
here,
if
you
want
to
know
more
Also
here,
a
lot
of
different
contacts,
and
here
we,
for
example,-
are
now
not
in
primitive
data.
But
that
is
also
the
The
link
is
also
inside
the
tutorial,
but
only
for
you
to
know
why
we
use
these
contacts,.
A
A
A
And
that
can
be
done
learning
it
is
that
it's
a
little
easier
for
you
to
know
what
it
means
is
that
the
sign
is
like
something
like
this
as
negative
here,
no
less
than
we
have
like
that.
That's
a
sign,
but
we,
the
ansaint,
is
that
it
doesn't
have
so
it
can
only
be
like
positive
I
tell
you,
because
they
do
not
have
a
sign
in
front
of
it.
So
that
is
why
it
is
called
before,
and
that
does
mean
that
they
are
not
negative.
A
Like
how
big
is
that
we
have
in
that
in
that
variable
So
here
we
can
specify
it.
We
have
8
bits,
and
so
we
can
call
it
8
like
this,
and
there
we
put
as
a
number
that
we
can
put
in
here.
They
are
also
like
the
the
rangers
that,
like
they
can
put
it
in
here
and
if
we
don't
have
anything
it
's
like
a
it's
the
same
as
256
So.
That's
the
same.
If
we
put.
A
That
here
well
And,
that's
Juventus,
they
are
positive
numbers
and
then,
if
we
can
specify
If,
we
know
how
big
they
are
going
to
make,.
We
can
specify
how
many
bits
to
win,
and
we
have
almost
the
same
thing
here
with
Interjet,.
The
difference
is
that
they
can
also
be
negative
and
in
the
end
we
have
the
e3
address.
That
is
used
a
lot
in
that
It's.
A
The
address
that
you
have
like
an
external
account
like
one
that
you
have
with
one
of
those
here,
because
you
can
handle
it,
that
you
can
do
things
in
the
universe
with
it.
Then
the
contacts
also
have
an
address
So
if
you
want
interact
with
in
contact,
so
they
also
use
Esa
esa
And.
Yes,
the
address
the
Heroes
here
has
20
bytes
And.
If
that
is
the
size
of
the
heroes
and
then
also
other
versions
like
a
a
esp
sentence,
Ecial
respect
where
they
can
command
to
receive.
That
is
not
so
important
here.
A
The
last
thing
here
also
capable
and
so
chapter
is
not
so
important,
but
only
that
you
know
some
primitive
data
and
you
are
going
to
use
a
lot
of
that
data
and
here
the
value
that
they
are
going
to
have
like
this.
If
it
is
not
defined
So
here,
the
bullying
is
going
to
be
false.
You
in
French
I've
been
here
for
as
long
as
it
arrived
and
eh
And
the
address
plus
that
address
Well.
Yes,
that's
very
easy.
A
Now,
let's
see
here
is
the
mission
again,
yes,
Create
a
new
variable
that
has
that
it
is
Public
that
it
is
an
edros
and
now
that
is
a
bit
complicated
So
there.
You
have
to
think
a
bit,
because
we
don't
have
the
easy
solution
here,
but
yes,
they
will
be
able
to
do
it,
It's,
not
that
difficult
either
and
if
they
have
to
put
how
a
value
here
that
works
can't
be
set
to
any
value
But,
it
has
to
be
a
value
that
could
be
an
address
of
So.
A
That's
the
mission
first
that
variable
and
then
a
variable
again
negative,
and
what
e
is
public
and
there
they
have
to
know
what
the
type
is.
But
I
think
that
after
we
lived
that,
they
will
also
know
what
it
should
be
and
then
the
last
new
variable
will
be
New
en
And
that
too
It's
a
bit
difficult.
It
can
be
there.
They
also
have
to
think
What
is
the
smallest
size
and
also
the
smallest
value.
So
here
so
they
are
If.
That
is
the
mission
Third
and
the
first
and
the
third,
maybe
a
little
difficult.
A
A
A
Going
to
see
the
resolution
and
continue,
well,,
let's
go
here,
check
answer
here:
Well,
the
address
here,.
The
easiest
thing
would
be
to
just
put
the
address
here,,
which
is
the
default
here,,
but
the
best
thing
would
be
that
if
you
were
already
using
meta,,
you
could
also
copy
it
in
your
class
and
put
it
here,
inside,
too..
A
A
A
Ok,
now,
let's
see
if
a
little
quick
to
the
variables
here
is
not
something
either
very,
very
interesting,
something
very
difficult.
And
yes,
but
today
we
are
going
to
look
at
the
easier
things
and
then
you
can
continue
a
bit.
So
we
have
three
different
types
of
variables
that
have
We
have
the
state
variables
that
we
have
already
seen,,
not
the
States,,
although
they
are
the
ones
that
we
are
going
to
put
in
the
blockchain
And.
A
A
A
Are
outside
a
function,
then
we
have
here
local
variables
in
which
we
have
here
inside
a
function
and
then
we
are
going
to
see
other
functions
as
well.
That
will
be
the
next
chapter
and
there
we
have
as
a
teaching
function.
We
will
see
in
more
detail
in
the
next
chapter
next
next
chapter
on
functions,
but
you
can
also
see
that
that's
like
a
variable
that
only
exists
in
between
this
function.
So,
that's
a
crazy
variable
Might
as
well.
A
A
We
call
the
function
in
that
case
too,
and
then
we
have
the
global
variables
that,
and
this
too,
that
someone
said
it
would
be
nice
if
we
could
have
it
and
in
that
Heroes
of
a
and
in
this
choice
of
a
direction.
And
yes
with
with
that,
that
would
be
a
bit
different,
but
Those
in
global
variables
are
also
called
special
variables,
such
as
100,.
A
They
are
variables
that
we
can
use
to
find
out
something
about
the
blockchain,,
such
as
the
state
of
the
blockchain,,
but
the
blockchain
is
more
than
just
a
function
for
a
variable
that
gives
us
more
information.
For
example,
we
have
here
two
one:
is
the
timesteam
blog
that
a
lot
of
people
use,
because
there
is
no
easy
way
to
know
how
your
time
is,
but
the
Times
blog
is
a
way
to
know
er
that
so
there
we
can
know.
A
A
That
is
that
we
call
it
the
value
of
that
global
will
have
the
value
of
the
person
or
the
entity
that
calls
that
function
So
with
that
it
is
not
the
person
the
entity
does
not
have
to
put
its
address
in
here,
but
why
can
we
use
that
Global
variable
in
months
with
that?
We
can
know?
What
is
the
What
is
the
address
of
that
person?
Yes,
the
everse
of
the
color
and
yes-
and
there
are
a
lot
of
different
global
variables
that
you
can
see
here,
also
in
the
request,
documentation.
A
Which
is
a
Us
I
think,
maybe
that
is
not
said
here,
but
it
is
a
yunt
and
what
we
want
to
do
is
so
already
the
value
of
the
current
number
of
blocks
of
the
state
variable
blog
number,
that's
going
to
be
a
little
capable
sounds
a
little
vague,
but
if
you
go
to
the
documentation
capable
you're
going
to
find
something,
that's
going
to
work
for
that.
Yes,
so
here
we
lived
in
that
one
in
that
chapter
to
different
variables,
not
the
global
trees
and
that's
good.
A
He
has
played
a
bit
with
those
global
variables
and
yes,
with
the
with
the
with
the
link
here,
go
back
to
the
documentation
and
then
maybe
they
can
find
the
solution
for
that.
For
that
mission,
with
that
OK
So
I'll,
give
it
another
five
minutes
and
I
think
then
we
have
one
more
mission
and
after
that
we
're
going
to
see
how
how
to
use
Script
for
so
one
more
one
more
mission,
and
we
are
ready
with
that.
A
A
If
I
already
had
some
people
who
had
the
solution
that
here,
we
have
a
public
yuns
called
block
number
that
we
have
here
and
then
here
we
use
that
cycle
global
variable
or
special
global
variable
that
we
use
blog
point
number
and
there
it
is
and
there
we
have
it
Ok.
We
have
a
little
bit
of
time.
So,
let's
go
to
the
next
chapter.
A
A
A
Is
a
is
public,
the
same
thing
we
did
before.
It's
also
a
State
verb
state
variable,
and
now
we
have
the
new
thing
that
if
we
just
declare
it,
but
no,
no,
no,
no
we're
going
to
teach
it
a
value
to
leaves
So.
Now
we
have
the
functions
to
do
a
little
more
Dynamic,
where
what
we
are
going
to
give
a
new
value
and
also
that
we
have
read
the
value
of
that
of
that
variable.
A
B
A
A
That
has
to
be
the
same,
and
then
we
have
to
say
again
here
we
have
the
visibility
so
who
can
use
that
in
function
and
if
we
put
it
public
for
everything
you
can
call
it.
So
we
and
all
the
people
around
the
world
I
can
talk.
I
can
call
you
from
outside
contact
So,
that's
what
we
want
to
do
to
also
use
it
and
in
the
end
here
Inside
the
function.
A
We
show
the
value
of
the
parameter
underscore
nun
al
only
in
and
from
there
we
are
very
easy.
So
we
could
put
a
new
value
to
our
variable,
and
now
we
have
here
How
to
read
a
a
state
variable
and
that's
why
we
create
a
new
function
called
get
and
now
in
the
speakers
here
we
don't
have
anything
inside
because
there's
only
one,
we
don't
have
to
specify
what
we
want.
There's
only
one
thing
we
can
return
And,
that's
in
a,
and
so
we
don't
have
to
put
something
special
here.
A
It
will
be
public
again,
and
here
is
a
new
thing
that
is
now
a
keyword
called
View
and
with
that
we
can
differentiate
that
function,
and
that
is
a
new
thing
in
blockchain
that
you
will
not
see
I
think
in
other
languages
of
programming
And.
That
is
that,
with
the
view
now
we
say
that
we
are
not
going
to
change
the
state
of
the
blockchain.
We
are
not
going
to
change
to
win.
Only
God
read
something
from
the
blockchain,
but
I
do
not
want
to
change
something.
A
So
there
is
no
need
to
make
a
transaction
with
that,
because
we
change
something
so
the
value
that
we
have
here
within
that
variable
in
the
blockchain
that
is
going
to
change
and
why
we
change
it.
We
have
to
make
a
transaction
So.
We
have
to
pay
for
that
And.
That
is
going
to
be
a
new
one
part
of
the
blockchain.
If
that
transaction
is
going
to
be
part
of
a
blog
that
is
based
on
the
blockchain
And.
A
That's
because
we
want
to
change
something
and
that's
going
to
change
everything
on
the
blockchain,
all
the
people
who
have
a
copy
of
it.
So
you
have
to
pay
for
that,
but
here,.
Since
we
only
want
to
read
it,,
we
don't
have
to
make
a
transaction,
well,,
and
that
can
be
said
with
the
word
View,.
There
is
also
another
word
called
Pure
that
we
are
not
going
to
use
today,,
but
you
will
also
find
it
here
in
that
tutorial.
If
you
want.
continue
with
that.
A
And
that
is
worse
is
that
we
are
going
to
read
something.
We
only
do
a
computation
But
that
we
are
not
going
to
No.
We
are
not
going
to
use
a
sheet
and
then
here
we
have
to
define
Now.
They
are
the
types
that
we
are
going
to
detonate
and
in
our
In
any
case,.
We
are
going
to
return
only
Juventus
because
we
are
going
to
return
to.
B
B
A
A
That
does
not
work,
because
it
is
a
Juventus,
and
here
we
also
have
Because.
It
is
public
here
we
also
have
the
other
function
that
we
have
automatic.
That
already
said,
it
goes
to
return
the
value
Well,
that's
good.
That
was
the
last
chapter
here
and
I
think
that
it
is
omitted
here,
which
is
very
easy.
If
you
want
to
do
it
to
a
public
state
variable
called
in
B
Which
is
of
type
Bull
and
starts
with
true
and
then
Create
a
public
function
called
getsby
that
returns
the
value
of
B
If.
A
A
If
it
had
to
look
like
this
and
if
I
hope
you
guys
that
I
think
it
wasn't
that
difficult
that
there
are
many
problems,
I
saw
is
that
if
you
go
to
checkenses
and
it
takes
a
while
and
the
page
does
not
say
Time
out
or
something
like
that,,
so
normally
it
should
work
a
little
better
if
the
internet
is
fast.
But
yes,
yes,
They
are
going
to
have
problems
at
home
or
something
like
that,.
They
can't
notify
us
And
again,.
They
can
also
just
press
reload
and
from
there
it
should
work,.
A
But
let
us
know
if
there
are
problems
with
that.
But
well,.
Let's
see
what
happens
here
or
we
see
the
basic
syntax,
primitives,
variables
and
functions,.
Then
there
are
view
functions
and
I
can
do.
That,
I
already
talked
about
how
Pure
and
View
are,
that
we
already
saw
here,.
Then
there
are
modifiers
and
constructors,,
which
is
also
very
interesting,.
It's
a
little
more
complicated.
A
Flow
control,
yes,
slightly
more
complex
data
structures
loops.
There
are
a
lot
of
other
things
that
you
want.
If
you
can
that
you
can
continue
had
all
that
later.
We
have
as
transactions
here,
and
that
is
if
for
beginners,
it
is
not
something
that
is
that
it
is
more
or
less
easy
and
all
those
contracts
come
from.
The
contacts
of
solicity
example
here,
which
I
do
think,
are
very
good,
and
it
is
something
that
many
people
use
and
then
also
if
they
are
most
interested.
A
A
721
the
nfc
contact-
and
that
is
something
that
we
are
going
to
see
now,
because
what
is
the
desire
of
WhatsApp
is
to
see
how
we
can
an
nft
and
maybe
a
little.
We
can
see
that
it
is
an
nft.
We
do
not
have
so
much
time,
but
I
hope
we
can
I
mean
yes
Well,
let's
here
that
was
the
course
requested
for
beginners,
but
there
are
also
other
courses,
health
courses.
A
And
contact
with
your
pasta
here
it
is
like
a
little
more
complicated.
It
is
already
like
a
contact
how
to
do
if
a
contactor
and
your
pasta
that
has
that
that
is
already
a
bit
more
complex,
But
that
that
now
we
are
going
to
see
a
little
in
the
contacts
in
ft
just
a
little,
because
we
do
not
have
so
much
time
but
well
I
will
not
go
there.
The
introduction,
but
you
can
also
read
it
I
hope
I-
will
try
to
explain
that
a
little.
A
A
He
said
that
they
are
going
to
do
something
with
that.
Well,
that
was
very,
very
famous
five
years
ago
and
now
that
it
is
very
famous
in
recent
years,
it
is
the
nfts.
The
difference
is
with
the
fungible
that
everyone,
the
tokens,
are
the
same.
It's
like
a
coin
and
the
Non
about
token.
All
the
tokens
are
different,
so,
for
example,
if
you
want
to
create
a
coin
or
something
like
that,
it
could
be
that
they
are
all
the
same
and
you
can
trade.
It
ar
But,
if,
for
example,
you
want
to
put.
A
A
I
don't
know
a
a
a
part
of
a
work,
or
something
that
is
special
is
different.
You
use
it
with
an
nfc,
yes
And
with
those
contacts
that
also
pay
that
are
questionable
and
people
can
like
it
as
in
their
in
their
wallets,
or
they
can
also
interact
with
these
contacts
so
that
all
those
touches
can
be
used
can
be
used
on
the
ecosystem.
That's,
why?
There
is
a
token
standard,
And
that
's
what
the
standard
is
called
as
yourselty.
A
720
and
I
think
it's
here.
Well,
That
They
have
the
interface
So.
They
have
functions
that
all
those
who
use
that
standard
are
going
to
have
their
functions
and
That's
good,
because
that's
how
it
is
If,
you
think
back,
something
can
be
done,
for
example,.
If
you
want
to
interact
with
a
wallet,
or
if
you
want
to
interact
with
another
contact,,
you
know
that
it
will
have
its
functions
and
you
can
use
it.
Well,.
Let's
see
those
here,,
there
are
also
e
ventos,
but
we
are
not
going
to.
B
A
Into
that
there
are
like
functions,
for
example,
velens
of
a
where
with
that
function
you
know
the
address
of
someone
How
many
of
those
tokens
Those
people
have,
and
that
is
that
function.
Lazy
has
the
function.
1L,
So
each
token
in
the
nft
standard
has
an
ID
token
So.
You
can
except
a
new
one
in
this,
and
there
will
always
be
another
Haiti,
and
so
you
can
know
which
of
that
Haiti
Which
is
the
owner
of
that.
A
A
There
are
some
that
are
important
and
those
that
the
officials
that
you,
if
you
want
to
use
the
one
that,
if
you
want
to
do
yourself,
send
Instagram
your
my
same
touch
in
contact,
they
can
use
it
or
they
are
going
to
use
that
standard
for
other
people
may
like
it,
and
we
have
an
implementation
of
that
standard.
We
have
here
from
Open,
which
is
a
very
famous
company.
A
To
make
contacts
that
already
a
a
lot
of
people
have
a
lot
of
outlets,
a
lot
of
people
see
it
and
see
it
and
see
it
and
everything
everything
worked.
And.
That's
an
implementation
of
that
For
example
where
it's
going
to
have
all
those
functions
that
we
saw
as
the
proof,
but
we
burned
it
was
And
then,
and
what
What
we
see
now
is
that
how
something
implemented
all
the
functions,
And
even
more
that
they
have
in
here
Well.
That's
like
a
contact
from
this
one
and
what
can
be
done
Also
in
remix.
A
That
is
very
good.
Is
that,
for
example,
here
we
use
a
contact
from
Open
from
that
system
here
and
we
just
import
it
from
get
away
from
them,
and
here
we
create
our
same
Jersey
the
same
in
contact
and
it
just
looks
like
that,.
It
doesn't
have
much
more
than
that,
because
we
use
everything
that
is
implemented
n
of
them.
We
give
it
a
name.
We
have
a
symbol,
and
here
we
put
where
we
put
the
metadata.
A
Well,
that's
just
a
very,
very
quick
introduction
by
Netflix
And.
If
you
want
to
see
more,
you
can
see
it
in
that
course.
It
also
has
the
function
here.
Mint
Like,
this
create
a
new
token,
a
new
token,
with
an
ID,
a
new
nt
of
that
contact,
but
I
wanted
to
explain
that,
because
what
we
are
going
to
do
now
is
that
we
are
going
to
a
remix
nft.
That
is
like
a
rewards
And.
That
is
also
another
thing
that
can
be
done
with.
A
Remix
is
to
interact
with,
with,
with
with
excited
a
scripts
and
a
Script
So.
We
can
use
a
library
like
ISIS,
and
with
that
we
can
also
write
javascript
or
type
Script
in
this
case,
and
we
can
well,
in
that
case
the
inherited
And.
That's
it
that
we
are
going
to
see
now
that
it
will
not
doubt
much,
but
maybe
that
we
are
going
to
have
some
complications
with
the
WiFi,
and
that
is
why
it
may
take
a
little
longer.
A
But
yes,
but
that
I
just
wanted
to
give
an
introduction,
r,
the
nft,
and
they
can
also
ask
later
as
if
they
want
to
know
more
about
it,
but
to
know
that
it
is
not
so
complicated
and-
and
you
can
use
contacts
that
already
exist
and
we
use
a
contract
like
this
to
give
them
Ok.
Well,
what
you
have
to
do
is
more
or
even
less
that
we
signed
up
here.
I
hope
that
each
of
you
has
already
put
your
address
here
and
I
see
that
there
are
a
lot
of
them.
A
A
A
A
A
And
here
we
have
clips,
and
here
we
have
the
remix
too,
and
that
is
the
Script,
and
here
you
see
that
this
is
typescript
here
too
And
here
we
have
imported
a
very
famous
library
to
connect-
and
here
we
have
the
address
of
the
contact
that
we
have
already
deployed-
that
contact
that
you
see
here.
That
is
Life
on
a.
A
A
A
And
now
here
you
can
connect
to
optimism
as
well,
and
here
we
are
going
to
use
that
metamask
private
ingredient,,
which
means
that
we
no
longer
use
the
shower,
but
we
use
the
connection
that
we
have
as
a
goal,
more
than
in
our
case.
It
is
the
connection
to
Optimus,
and
now
it
is
that
direction
that
has
a
bit
of
easer.
Here
we
also
see
we
have
a
bit
of
Optimus
nicer,
So.
That
should
be
enough,
and
now
we
can
run.
A
A
Interacted
with
the
contact
and
I
have
that
that
token
well,
that
was
the
as
if
I
eat,
that
particular
Script
and
now
I
don't
know
now
I
think
we
are
almost
ready
with
time.
We
are
already
a
little
more
than
the
time
So.
If
that
does
not
work
for
you
too
I
thought
that
if
some
people
want
to
continue
with
it
and
because
I
know
that
the
ghetta
here
is
a
bit
slow,
we
can
also
go
to
the
hacker
space
below
and
what
you
can
try
there
and
I
for
her
for
a
few
minutes.
A
A
A
A
A
A
A
No,
the
image
cannot
be
changed
because
half
of
the
Data
is
is
is
is
in
contact,
you
can't,
yes,
they
are
in
contact.
Sometimes
it
says
that
you
can
but
but
not
like
this
OK
Well
I.
Think
I
don't
know
what's
next,
there
is
nothing
after
OK.
Well,
then
also
I,
think
you
can
it's
a
little
further
here,
but
there
is
official.
Whatsapp
ended,
but
I'll
be
a
little
more
here.