►
Description
Niclas explained Blockchain from the fundamentals to deploying a program on Solana as an example. We've discussed Ethereum, web3 principles, and more ideas about blockchain development, CI/CD, Ops (storage, backup, observability).
* Proof of work vs Proof of Stake: https://tradewithus.ch/know-how/proof-of-work-vs-proof-of-stake/
* Solana quickstart: https://github.com/solana-labs/example-helloworld#quick-start
* Awesome Solana List: https://github.com/avareum/awesome-solana
* Solana development guide by Nader Dabit: https://dev.to/dabit3/the-complete-guide-to-full-stack-solana-development-with-react-anchor-rust-and-phantom-3291
* Book resource: Mastering Ethereum: https://ethereumbook.info/
* Meetup: https://www.meetup.com/everyonecancontribute-cafe/events/283360587/
More at https://everyonecancontribute.com/post/2022-02-08-cafe-48-blockchain-web3/
***Save the date for the next meetup on 2022-03-08: AquaSecurity and Open Source with Anaïs Urlichs*** - https://www.meetup.com/everyonecancontribute-cafe/events/283725605/
B
Just
making
the
move,
so
I'm
ready
mostly,
I
need
only
to
close
some
windows,
but
we
can
also
start
this,
like
I'm
open
for
everything,
great
yeah,
okay.
So,
as
the
title
said,
we
want
to
talk
a
little
bit
today
about
blockchain
and
web3.
So,
first
of
all,
this
is
like
only
my
personal
opinion
on
that.
I'm
watching
in
the
company
is
also
doing
some
blockchain
related
stuff.
But
this
is
another
topic.
B
I
will
show
you
today
a
little
bit
what
it
can
be,
and
mostly
not
what
you
probably
know
for
more
people
are
familiar
with.
So
I
won't
talk
today
about
bitcoin.
I
won't
talk
about
nfts.
I
won't
talk
about
any
other.
What
you
probably
know
as
crypto
coins
like
dodge,
join
and
so
on,
I'm
more
interested
in
the
hyper
space.
B
Then
we
will
draw
a
little
bit.
Okay
and
I
need
to
switch
my
display
in
the
meantime,
but
besides
that's
entertain
tortilla
yeah,
and
this
is
mostly
what
we
gonna
do
today.
So
by
the
end,
so
I
want
to
explain
you
a
little
bit
the
concepts
of
the
blockchain.
I
want
to
explain
you
a
little
bit
how
blockchains
look
like
and
in
the
end
we
join
our
favorite
parts
and
everyone
trying
to
contribute.
B
B
B
A
B
B
There
are
a
lot
of
blockchain
stuff
going
around,
so
I'm
not
a
fan
of
talking
only
about
blockchain,
and
this
is
all
the
source
of
truth
and
it
will
fix
all
our
problems,
mostly
not,
but
probably
some
parts
of
problems,
and
mostly
what
I
want
to
show
you
in
first
off
is
like
yeah.
You
know
in
probably
the
concept
of
blockchain
we
are
living
here,
but
all
the
topics
are
in
an
own
space
and
it's
called
distributed
ledger
technology
in
the
end,
so
dlts
are
existing.
B
Now
for
since
1996
there's
a
cruel
article
from
the
first
blockchain
was
in
the
new
york
times,
so
I
will
send
out
later
have
a
link
to
it.
I
don't
want
it
prepared,
but
I
didn't
have
time
and
now
we're
talking
about
when
I'm
talking
about
dt
they're
different
concept
of
dlts,
so
of
course
you
can
do
have
a
broad
change.
So
it
means
like
we
have:
multiple
transactions
are
covered
into
one
block
and
the
next
word
plot
will
be
appended.
So
this
is
the
blockchain.
B
So
do
you
know
probably
some
famous
designs
so
bitcoin
we
thought
of
bitcoin
with
ethereum.
Now
there
are
a
lot
of
more
out
of
it.
So
that's
the
reason
why
we
have
dot
dots,
but
they
are
also
different
concepts,
so
it
doesn't
need
to
be
that
blocks
chained
together,
so
they
are
also
distributed,
ledger
that
using
directly
graphs
decks
and,
of
course,
transaction
versions.
There
are
also
some
other
big
platforms
that
you
know,
probably
nano
iota
and
all
the
stuff.
So
what
is
the
main
benefit
of
when
using
ldt?
B
So
you
have
increased
security
in
terms
of
what
you
are
doing.
So
it's
more
like.
We
have
a
problem.
Currently
we
are
in
a
digital
world
and
we
want
to
really
ensure
that
we
can
trust
the
people
and
for
this
we
need
to
have
cryptography
for
that.
So
because
you
want
to
sign
something
in
the
real
world.
You
have
a
paper
and
you
write
something
on
a
paper.
So
that's
it,
but-
and
you
can
see
from
the
sign
from
the
signing
in
the
digital
world-
it's
not
possible.
B
So
in
the
digital
world
you
need
to
have
some
algorithms
or
some
math
skills
and
then
to
really
make
the
ownership
of
a
file
to
you
that
we
can
see
okay,
who's,
the
owner
of
that
file-
and
probably
some
of
you
know
this,
so
we
have
private
key
pairs
for
that,
our
public
tps
event
with
a
public
key
and
a
private
key,
and
this
is
what
we're
also
calling
in
the
crypto
world
or
in
the
distributed
ledger
technology.
A
wallet.
B
A
wallet
is
nothing
else
than
a
product
on
the
private
gpa
and
of
course,
we
now
have
the
signing
we
can
send
transactions.
Most
of
them
are
for
payments
for
tokens,
but
also
there
are
different
other
types
of
transactions
that
can
be
done.
Performance
level
of
anonymity
are
different
outputs
of
that,
but
this
is
in
the
scale,
the
dlt
so-
and
this
is
quite
really
good.
One
of
the
dlts
that
I
want
to
show
you
today
is
mostly
probably
you're,
not
so
familiar
with
it
right.
B
B
You
can
also
see
the
current
transactions
you
can
see.
The
transactions
per
second
is
interesting
for
the
pricing
and
so
on,
but
zolana
is
more
a
little
bit
different
in
all
this
stuff
to
bitcoin
in
this
theorem,
because
they're
using
a
different
consensus
algorithm.
So
probably
every
one
of
you
is
saying:
yeah
we're
using
bitcoin,
but
bitcoin
has
this
type
of
proof
of
work,
so
proof
of
work
is
like
hey.
I
got
paid
for
something
I
I'm
stealing
now
is
it
in
micro.
B
A
B
I
will
cover
it
so
coming
back
to
the
topic,
so
you
know
proof
of
work,
probably-
and
you
know
bitcoin
in
the
case-
and
everyone
says
it
uses
so
much
energy,
because
yeah,
of
course,
how
a
transaction
or
new
block
is
created
in
bitcoin
is
hey.
We
have
mining
capacity.
Someone
of
the
nodes
is
calculating
a
big
complex
map
that
needs
a
lot
of
power
and
energy,
because
you
do
using
graphic
cards
for
fingernails.
B
B
The
interesting
why
it's
different
and
why
it's
probably
better
in
some
parts
of
proof-of-work
is
so
here
we
say:
every
node
who's
in
our
current
system
has
the
ability
to
create
a
new
block,
but
the
owner
with
the
most
coins
in
the
network
as
a
node,
can
create
this
block.
So,
and
this
is
quite
you
don't
need
to
do
magical
cryptographic
or
you
don't
need
to
do
any
maths
for
that.
You
don't
need
to
do
any
other
special
types
of
that.
It's
only.
B
You
need
to
have
a
lot
of
coins
to
still
that
and
when
you
have
created
a
new
block
as
a
validator.
What's
a
server
in
the
end,
nothing
else
you
get
a
reward
for
that.
So
you
get
a
little
bit
transaction
fees
for
every
transaction
that
you
do
in
the
on
the
chain,
and
this
slide
will
benefit
so
you
we
don't
need
to
have
computing
power,
a
lot
of
computing
resources.
B
The
system
can
be
still
disarranged
and
we
have
a
lot
of
faster,
more
transactions.
So
why
you're,
probably
thinking
about
why
a
transaction
important
they're
different
systems
with
transactions,
so
a
probably
most
familiar
or
mount
system
that
everyone
knows
is
the
visa
card
system
and
this
system
has
24
000
transactions
per
second.
This
is
the
fastest
transaction
system
in
the
world
and
all
these
chain,
events
for
transaction
and
handling
are
trying
to
tape
this.
B
B
Also
by
itself,
are
we
having
like
transactions
wherever
concerns?
Who
can
create
a
new
block
is
a
little
bit
lightweight
and
more
proven
in
terms
of
that,
we
don't
need
to
use
so
many
proof
of
not
so
many
resources.
That's
the
reason
why
we
have
proof
of
stake
and
zolina
is
one
of
them,
so
there
also
a
lot
of.
Probably
people
can
shout
out
in
in
the
chat
and
all
the
stuff.
In
the
end,
there
are
multiple
chains
and
by
day
they
are
also
putting
up
some
view
of
that.
B
It's
also
not
what
we
also
can
see
if
you're
thinking
about
ethereum.
So
if
you
will
also
move
to
proof
of
stake
in
the
end,
so
that
it
will
be
also
more
in
energy
efficient,
but
it
will
take
time.
So
we
thinking
here
about
the
next
six
to
12
months.
So
hopefully
there
are
also
some
research
and,
as
you
see,
these
are
currently
on
the
site
on
the
lana.
These
are
live
data
so-
and
this
is
quite
fast,
so
2000
transactions
per
second
is
quite
good.
B
B
B
It's
a
special
distribution
of
a
blockchain
in
simple
words,
that's
correct,
so
you
can
see
currently
here,
I'm
switching
a
little
bit
so
here
we
have
the
latest
block,
for
example
on
ethereum.
This
is
also
a
familiar
blockchain
and
we
have
the
same
like
for
the
lana,
where
we
also
can
see
on
the
mainnet
when
the
latest
transaction
has
happening,
and
you
see
also
the
transaction
patrons
you
see,
it's
live
updating,
it's
really
on
the
live
system
on
zolana
and
we
can
check
what
is
now
the
benefit
of
the
dlt
is
yeah.
B
We
want
really
to
check
if
some
transaction
happened
or
on
some
accounts,
and
now,
when
we
had
now
an
id
of
a
transaction,
we
could
look
okay,
who
has
issued
it
from
which
blood
in
this
ver
the
interesting
side.
So
we
see
here
here,
that's
that
that's
a
transaction
in
the
end
we
reside,
it
was
not
processed
in
the
end
we
see
from
who
it
it
comes,
and
we
see
also.
B
A
B
A
B
B
B
So
wants
to
send
some
transactions,
so
I
want
to
send
him
something
some
information.
I
want
to
send
him.
I
really
want
solana
token
in
the
end
to
bob
so
and
then
bob
has
currently
would
have
flight.
Then
also
one
soul
and
alice
has
now.
Instead
of
three
alice
will
have,
in
the
end
a
corrected
value
with.
B
B
B
Now
it's
not
yeah,
it's
like
you
can
sing
like
often
even,
but
what
what
is
behind
this
idea
is
right,
because
we
are
in
a
digital
world.
We
need
to
sign
something
and
how
is
signing
working?
You
need
to
have
faith
here
on
that,
so
you
encrypt
some
information,
so
we
will
would
encrypt
the
information
with
the
the
property,
with
the
public,
key
and
or
bob
will
have
a
public
key
from
alice
or
twilight
alex.
B
This
is
the
public
key
of
alice
and
I
have
a
probability
of
also
from
bob,
and
these
can
be
used
to
verify
digitally
how
a
transaction
is
flowing,
and
this
is
what
all
the
help
all
the
stuff
is
happening
on
a
blockchain.
So
everything
what
you
can
see
on
a
blockchain.
These
numbers
are
little
republicans
so
and
they're
using
special
cryptographs.
So
this
is
like
a
little
bit
more
now
going
into
the
details
here,
so
I
have
a
represent.
B
B
A
B
So
and
that's
the
really
cruel
point
on
that,
so,
for
example,
you
have
a
rft
on
the
values
are
not
the
correct
ones,
but
I
think
so.
We
started
with
256
bit
ed
255
key
and
for
us
a
you
would
need
like
7
000
bits
to
save
it
and
this
the
problem.
Why
you
want
to
use
smaller
keys
with
they're
a
little
bit
more
compact.
They
can
be
also
easier
converted
by
mobile
systems,
for
example
your
phone-
it's
not
so
cpu
heavy.
Instead
of
securing
the
same
information.
A
A
B
B
A
B
Yeah,
but
I
want
to
explain
why
it's
so
efficient
and
why
it's
so
interesting,
I'm
talking
about
that,
so
we
so
a
is
currently
our
public
key
and
no
sorry
a
is
our
private
key
b.
Is
our
public
key
and
you
can
do
the
problem
is
mostly
why
you
want
to
have
cryptos
and
return
in
crypto.
It's
like
a
trapdoor
that
the
way
other
way
around
so
when
you
cannot
easily
calculate
the
private
key.
B
So
for
that
you
need
to
have
a
lot
of
compute
power.
So
this
slide,
what's
going
on,
okay
b
is
quite
easy
to
calculate
you
get
the
publicity,
it's
quite
easy.
You
don't
need
to
have
many
compute
resource,
but
getting
from
a
and
then
from
b
is
quite
hard,
and
this
is
the
reason
why
our
cryptos
are
secure
because
you
need
to
have
like
prime
numbers.
B
So
the
typical
is
based
on
your
prime
numbers,
so
elliptic
curves
using
like
a
mathematically,
elliptic
curve,
and
then
the
donation
is
like
you
need
to
want
to
connect
points
and
the
steps
you're
doing
is
your
secret
t
and
so
on
this
slide,
however,
public
and
privacy
is
working.
So
nothing
special
in
the
end.
B
Yeah,
of
course,
it's
getting
faster
in
general.
All
chains
are
getting
faster
and
it's
secure,
because
then
we
can
really
trust
the
people,
because
when
you
lose
your
private
key,
you
use
your
privacy.
All
your
information
also
done,
and
you
cannot
send
other
people
with
privacy.
When
you
lose
for
priority.
You
cannot
use
the
same
public
key
then
anymore.
You
need
to
get
a
new
one
and
then
that's
the
reason
why
you
need
to
protect
your
private
key.
B
B
On
as
well
yeah
so
and
the
interesting
topic
about
that
is
like
do,
I
have
it
here,
no
yeah
here
there
are
some,
but
this
is
like
an
own
topic
agent,
the
whole
day
about
it.
It's
like
that,
how
you
generate
for
privacy
is
also
a
little
bit
different
in
the
systems,
so
you
use
sim.
As
for
blockchain
you're,
using
like
a
memory,
these
can
consist
of
12
or
25
words.
In
plain
english
word
words,
and
this
will
be
used
to
generate
the
privacy
in
the.
B
This
is
the
reason
why
you
can
also
use
like
a
paper
wallet.
You
can
write
these
words
on
a
paper,
put
it
into
your
vault
in
your
local,
real
world,
world
and
situate
it,
and
then
you
can
every
time
generate
your
private
key
again,
but
there
are
a
lot
of
more
advanced
concept
of
how
you
can
generate
from
these
master
private
keys
and
also
new
privacies
and
so
on.
But
this
is
not
out
of
stop.
B
This
is
like
currently
not
information,
but
I
want
now
to
jump
more
into
the
technical
part,
because
we're
going
now
into
30.
We
are
already
on
30
minutes
and
I
want
to
show
some,
as
I
explained
some
rust
and
also
all
the
other
stuff,
and
then
we
protein
also
how
to
generate
an
account
and
so
on,
yeah,
okay.
B
So
it's
a
simple
hello
world,
how
I
can
center
transaction
on
solana
how
and
how
I
can
get
hello
back
from
an
account.
So
account
is
a
little
bit
special.
I
will
explain
it
also
in
the
world
when
we're
taking
this
so,
but
let's
do
first
steps.
If
you
want
to
try
it,
it's
also
possible
to
do
a
dip
pot.
I
didn't
test
it
on
git
pod,
but
it
works
for
sure.
So
you
can
also
use
it.
You
need
to
have
rust,
mpm
installed.
B
B
B
It
started
my
own
single
blockchain
on
my
computer,
so
it's
a
one
now
blockchain,
where
I
can
do
all
the
transactions
and
all
the
stuff
and
connecting
with
my
with
my
account
and
doing
this
stuff
so
and
you
see
also,
as
I
said,
I
talking
about
identities,
everything
in
the
blockchain
or
on
the
lana
has
like
an
identity,
so
also
the
node
by
itself
has
an
all
private
key
pair
to
sign
the
transactions
and
so
on.
When
I
do
doing
that,
yeah.
B
B
B
So
now
I
want
to
get
my
personal
salon
id
that
I
use
for
all
my
transactions,
of
course,
but
this
is
not
my
real
one.
What
I
use
on
the
mainnet
this
is
for
my
testing
and
you
see,
is
the
current
id.
So
this
is
a
public
key
and
I
would
recommend,
use
only
save
them
and
use
them
later,
don't
expose
them
and
id
jason.
You
will
find
the
privacy
of
it
so
it
uses,
as
I
said,
it's
quite
easy
to
generate
the
public
key
out
of
it
and
it's
written
in
form.
B
So
that's
true!
So
now,
let's
do
the
next
step
and
let's
connect
to
our
chain,
because
we
want
to
inspect
also
when
transactions
are
happening,
and
this
is
really
cool.
This
is
what
I
like.
You
can
go
to
explorezolana.com
set
up
a
custom,
rpc
url,
because
it's
browser
app
and
then
it
will
connect
to
your
current
blockchain.
A
B
Yeah,
we
probably
can
have,
as
you
see,
our
transactions
on
our
chain
are
not
so
fast
on
our
local
chain.
We
have
two
transactions
per
second,
not
two
thousand.
It's
currently
running.
We
have
the
information.
When
it
was
started,
we
can
see
the
term
block
height.
So
that
means
like
what
is
the
current
block
available?
What
is
the
next
block
so
where
the
next
transaction
goes
in
and
so
on?
B
B
Yeah,
and
this
is
like
what
everyone
uses
in
the
chain.
What
is
so
interesting?
So
there
are
little
different
use
cases
to
use
these
smart
contracts,
because
it's
not
that
they
are
written
by.
They
are
written
by
humans,
but
they
are
not
controlled.
So
there's
no
human
who
is
sitting
behind
that
and
checking
who?
Should
I
read
so
this
everything
is
automatically
done
in
the.
A
B
And
for
that
we
can
write
a
lot
of
more
advanced
concepts
like
decentralized
financing,
uni
swaps,
general
swapping
all
the
stuff
is
coming
up
yeah
so
and
for
that
we
will
start
to
deploy
our
own
first
smartphone
trade
checking
it,
and
I
will
see
also
you.
I
will
show
you
a
little
bit
of
benefits
out
of
it.
So,
okay,
so,
as
I
said.
B
B
This
is
the
reason
how
solana
allows
us
to
write
the
smart
contract
info
program
in
the
end,
so
I
would
propose
to
do
it
with
rus,
because
I'm
a
little
bit
familiar
with
it
c
is
also
fine,
but
I
didn't
test
it,
but
yeah.
So
for
that
we
have
here
the
program
and
we
will
now
make
a
short
look,
how
it
looks
like
so
in
the
end,
a
zolana
program
is
like
an
automation
transaction
handler,
nothing
else,
so
you
can
do
different
types.
B
So
what
we
are
doing
our
example
is,
we
would
read
every
time
we
seen
an
identified
account.
An
account
in
solana
is
like
the
for.
The
program
is
slightly
identifier,
so
every
because
the
robot
needs
to
remember
who
is
and
who
is
bob
so
the
program
the
our
beta
will
remember
on
ls,
vid
and
also
the
bob
id
in
the
end
so
and
for
this
it's
been
used
to
getting
the
information
so
yeah
on
that
we
have
then
everything
mostly.
B
Mostly
up
and
now
we
can
start
to
deploy
our
we,
we
were
building
our
program
and
deploying
it
so
what
it
does-
and
this
is
interesting
on
solana,
so
it
uses
you
can
use
different
languages
in
the
end
you
can
use,
as
I
said,
rust,
c,
plus,
plus
and
so
on,
but
what's
also
interesting
on
evaporation
needs
to
be
so
pop
bpf,
berkeley,
petrol
filter.
You
know
it
probably
from
from
networking
in
tubernators.
B
B
B
A
B
As
we
see
now
that
the
the
file
is
now
done
so
and
also
what
is
interesting
as
I
talked
about
it,
so
our
program
has
also
an
identity.
So
this
is
like
a
private,
the
public
key
of
our
program,
so
that
we
need
to
know
where
we
need
to
talk
to,
and
we
can
also
check
it
so
with
checking
the
public
key
and
we
see.
B
B
B
It
doesn't
have
symbols,
okay
relating
now
the
object
here
and
now
we
need
to
do
a
transaction
on
the
chain
so
that
the
program
is
activated
so
for
that
we
can
simply
deploying
it
so,
and
the
true
part
on
zolana
is
mostly
that
it
also
brings
over
development
experience.
So
we
can
easily
say
now
solana
deploy
a
program
deploy
the
hello
world
and
what
it
does
it's
starting.
Our
transaction,
because
also
transaction
is
needed
and.
B
Artwork
and
now,
when
we
see,
as
you
see,
we
get
now
a
program
id-
and
this
is
the
address
where
we
can
speak
to
the
program
in
the
end
and
as
you
see
the
program
id
is
the
same
id
of
a
public
key.
So
the
public
key
from
the
program
is
for
problem
id,
so
everything
every
address,
it's
like
in
a
blockchain
or
in
a
in
a
dlt,
mostly
slightly
public
key.
B
So-
and
this
will
address
where
we
can
speak
to
now,
because
I'm
talking
about
it,
how
we
can
speak
now
for
that,
it's
like
yeah.
We
need
to
have
a
program
also
to
program
it,
because
it's
serving
our
chain.
We
don't
have
it
so
and
for
that
what
most
people
are
talking
about
when
they're
talking
about
web
3
is
now
establishing
a
stationary
connection
to
the
to
the
chain,
they're
doing
some
transaction
on
that
and
probably
saying
hello
world
and
that's
it.
B
So
this
is
like
the
whole
web
3
thing
in
a
simple
word.
So,
of
course,
people
think
now
you
can
build
this
round
more
building,
more
decentralized
apps
on
that,
but
for
more
more
original
slides,
we
can
do
like
simple
grpc
chords
to
the
chain
and
instruct
them
send
a
new
transaction
crawling.
A
program
crawling
a
smartphone
trade
doing
all
the
stuff
can
be
done,
and
for
that
we
need
only
to
have
an
open,
grpc
connection
in
the
end,
within
a
phased
instruction
set.
Of
course,
it's
not
like
that.
B
B
B
It's
the
party
okay,
so,
and
what
we
can
do
a
little
bit
to
the
program,
so
we
have
a
pair
so
because
someone
needs
to
spend
money
so
because
data
is
expensive
on
blockchains
and
you
don't
want
to
waste,
and
this
means
like
every
data
that
is
hold
on
zolana
and
the
program
needs
to
be
paid
a
fee.
So
you
need
to
rent
the
data
space
and
for
that
we
need
to
have
a
a
payer
and
prepare
account
is
currently
my
private
account.
B
So
the
private
account
that
lives
currently
under
the
solano-
and
it
will
use
this
account
to
getting
the
transaction
fees
so
that
veterans
can
be
remembered.
The
program
in
the
example
is
then
creating
a
small
account,
the
seat
for
generating
the
code
of
generating
the
public
keys,
mostly
like
here
hello
later.
B
We
can
also
change
it
and
I
can
show
you
the
example
of
how
to
run
it
and
now,
for
example,
when
I
want
to
read
the
first
of
the
hello
account
10
times,
I
can
now
start
a
simple
for
run
and
we
see
now
here.
Let's
say
it
will
be
connected
it's
connected
to
the
chain.
We
see
also
how
many
free
fees
are
over.
B
B
This
is
our
program
account
and
we
can
see
now
all
the
transactions
that
are
also
happened
so
and
it
will
show
us
more
and
show
us
more
so
because
we're
doing
10
times
and
which
it
can
check.
Also
the
result
so
and
we
can
see
what's
happening
in
the
end.
So
we
see
okay,
it
has
happened
the
transaction,
but
it
was
paid.
It
was
written
to
the
tron
trade.
B
And
yeah-
and
we
see
also
here
it's
true,
because
the
program
has
also
some
program
lock,
we
see
also
how
often
it
was
crawled.
So
we
can
here
also
see
how
often
it's
I've
read
it
also
in
the
chain.
This
is
quite
cool
so
because
you
would
probably
see
yeah
I'm
I
talk
now
to
hello
ten
times
so,
but
what
would
happen
in
the
end?
We
do
it
now
we
want
to
read
now.
Everyone
can
contribute.
B
And,
as
I
said,
we
need
to
have
an
identification,
a
new
key
will
be
created,
and
hopefully,
when
everything
goes
right,
we
will
have
now.
The
greeting
will
start
from
one
again,
of
course,
because
it's
a
new
account
so
and
we
have
a
new
new
signing
key.
It
will
be
used
for
that
and
we
can
now
check
again
the
transactions.
A
B
And
you
see
now
you
also
see
that
the
transaction
from
before
was
at
500.
The
chain
also
mines,
the
validator
mines
new
blocks.
Then
again
again,
so
it's
like
you
know,
we
can
check
here,
for
example,
that
we
that
the
account
gfx-
what's
currently
probably
our
account
with
everyone-
can
contribute,
has
executed
10
times
he
turns
edge
to
the
program
and
we
can
also
see
currently
he
doesn't
have
any
tokens.
B
He
has
a
little
bit
balance,
so
it
means
like
he
has
currently
a
little
bit
stuff
that
he
could
spend
on,
but
probably
mostly
not
enough
for
the
data,
but-
and
we
can
see
also
the
data
that's
currently
allocated
so
and
for
that
now
we
can
build
up
complex
systems
and
yeah.
So
we
could
there's
a
lot
of
cool
resources
on
that.
B
Okay,
so
what
I
showed
you
in
the
past
minutes
so
first
we
started
our
own
chain
with
with
the
lana
test
validator,
so
starting
our
own
chain
for
local
development,
we're
not
forced
to
use
it.
We
configured
our
cli
to
connect
to
that.
So
this
is
what
done
via
this
stuff.
We
having
generated
our
private
key
pair,
I
have
already
created
it.
B
You
can
create
it
also
with
hegenu,
but
it
will
say
currently,
hey,
don't
do
use
it,
because
I
have
already
so
and
then
we
have
started
to
deploy
first,
the
program
so
who's
allowing
to
greeting
us
all
the
time
this
was
deployed
after
we
rebuilded
it.
So
we
built
it
if
for
simple
rust
wrapper
and
then
we
started
to
deploy
it
again,
so
we
deploy
it
and
then
we
started
to
use
it
and
we
use
it
with
javascript
in
this
time,
but
you
we
can
use
also
different
languages.
So
here
we
can
see.
B
B
B
B
So
this
is
like
a
little
bit
paid
to
on
the
mainnet
but,
as
I
said,
no
worries,
so
you
can
also
go
to
the
defnet
or
tesla.
They
can
generate
solana
tokens
for
free
or
you
start
locally,
because
I
really
like
to
work
locally
and
can
test
different
things
out,
programming
differently
and
the
main
benefit
for
the
lana,
for
example.
For
me
and
getting
started
into
blockchain
is
like
hey.
B
You
see
this
is
like
looking
a
little
bit
different
than
like
our
rust
code
and
you
get
a
lot
of
more
insights
to
that.
If
you're
coming
for
us,
you
can
use
also
c
or
c
plus
plus
to
write
in
your
smart
contracts,
and
you
don't
need
to
use
solidity
for
that
yeah
and
that's
the
short
first
steps
into
blockchain,
not
so
what
it
can
be.
B
Web
3,
mostly
what
people
thinking
about
it,
is
like
okay,
web
3
is
hey.
We
want
to
build
a
new
web
and,
as
you
see,
we
could
really
act
autonomously
on
a
chain,
because
it's
decentralized
typically
so
not
everything
is
running.
On
my
blockchain,
I
have
one
node,
it's
like
different
nodes
of
a
word.
We
have
a
decentralized
but
not
when
venetra
doesn't
have
a
really
centralized
owner
and
now
we're
coming
to
the
top
page.
Okay,
how
can
I
speak
to
all
these
programs
that
are
deployed
yeah,
we're
using
a
library
and
talking
to
that?
B
So,
in
terms
of
I
can
check
who
did
the
transaction
I
want
to
have
like
an.
I
want
to
do
a
transaction
between
alice
and
bob,
for
example,
a
business
of
a
finance
transaction,
and
now
I
want
to
have
a
trust
holder
between
that,
so
that
I
don't
need
to
trust
bob
directly.
Someone
will
keep
for
us
for
money
and
send
them,
but
afterwards,
if
you
give
us
the
benefit,
what
we
wanted
the
service
so
for
that
you
can
make
a
program
out
of
it
and
having
this
contract
and
checking
it.
Programmatically.
A
B
A
Or
like
thinking
in
a
way
of
like
using
a
gpg
key
to
sign
an
email,
this
was
always
like
it
depended
on.
It
was
dependent
on
the
central
servers
and
then
each
side
needed
to
have
it,
and
it
was
super
complicated,
in
my
opinion,
so
like
trying
to
solve
that
angle,
and
the
second
thought
I
had
was.
We
do
have
like
a
centralized
dns
infrastructure,
even
though
it's
distributed
it's
controlled
by
different
parties,
and
I've
seen
that
there
are
sort
of
dot,
eth
domains,
something
like.
B
B
B
Is
mostly
that
I
easily
can
find
because
the
problem
is
like
who
can
remember
this
id
in
in
the
theorem
it's
on
in
the
field
it's
written
in
hex,
so
you
cannot
remember,
that's
it's
ens
is
mostly
for
hey.
I
want
to
link
to
my
public
key
and
I
can
use
it
to
cross
over
over
systems,
because
the
name
is
more
simpler
to
remember,
instead
of
having
like
the
public
key
id,
so.
A
B
You
and
when
we
are
looking
in
terms
of
the
topic
about
identities
and
who
I
can
trust
as
we
as
we
saw
already
in
the
chain.
Everything
is
in
a
transaction.
Everything
is
traceable
in
some
way
because
it's
in
a
public
chain,
it's
not
written
in
public,
multiple
people
controls
it
and
then
we're
coming
into
the
topic
about
decentralized
identity
systems.
A
B
Not
google
is
controlling
your
identity.
You
can
control
your
own
identity
by
yourself,
for
example,
your
identity
is
living
on
a
blockchain,
it
can
live
in
a
theorem
and
you
can
do
then
key
rotation
on
it.
Also
because
it's
only
the
identifier
from
from
your
blockchain
id,
but
there's
this
there's
a
document.
It
called
so.
B
So
that's
also
the
reason
why
you
should
not
store
everything
on
a
blockchain,
because
you
need
to
remember,
you
can't
delete
it,
but
identities
is
a
good
play
place
for
living
on
on
a
chain,
mostly
on
a
blockchain,
because
you
don't
want
that
it
can
be
tempered.
It
should
be
only
to
be
the
owner
of
one,
so
it
should
be
like
multiple
owners.
B
A
Yeah,
I
had
another
question
and
I'm
sorry
for
so
many
questions,
storage
and
ops,
and
things
like
that.
So,
like
the
blockchain,
isn't
like
a
software
application
or
a
stack
running
somewhere,
what
is
the?
What
is
the
back
end?
What
do
I
need
to
backup?
What
do
I
need
to
monitor
or
observe
from
from
a
knobs
perspective.
B
That's
the
truly
part
of
it,
so
this
is
also
a
topic
that
we
had
on
another
channel
on
solana
for
the
lana.
I
have
not
so
many
experience
running
in
that
we
running
our
own
validators,
but
I
was
in
some
projects
involved
where
we're
running
our
private
effio
networks
by
ourselves
about
different
companies
also
and
because
it's
a
ledger,
it's
distributed.
Everyone
gets
the
same
ledger.
So,
for
example,
your
note
is
failing.
Currently
you
can
you
will
spin
up
and
all
the
transactions
go
back
to
your
ledger.
B
You
need
to
zoom
back
again
so
that
you
get
the
latest
block
and
then
you
can
participate
again
on
that.
So
and
the
data
is
not
so
big,
I
would
say
we
I
think,
on
on
the
zero
main
net.
We
are
currently
under
one
terabyte,
so
it's
it's
living
now
for
three
or
five
years
and
monitoring
is
like
another
topic
a
little
bit
so
because
there
are
different
topics,
we
monitoring
them
also
with
prometheus
and
they
are
also
services
for
you.
So,
for
example,
when
you're
looking,
I
don't
want
to
ask
myself.
B
I
want
only
to
get
the
data
fast,
so
there's
for
ethereum,
there's
currently
in
fura
who,
which
is
a
development
suit,
and
I
can
use
their
high
value
serum
apis
so
that
I
can
get
faster
feedback
of
that
instead
of
processing
directly
on
the
zero
maintenance.
So
they'll
also
benefit,
and
you
can
also
you
have
different
types
of
nodes,
I
would
say
or
servers
so
you
can
have
like.
B
A
B
Typically,
what
we,
what
what
we
do,
it's
30
is
like
we're
having
small
private
test
networks
so
to
having
faster
transaction
fees
than
the
test
nets,
so
that
we,
the
problem,
is
there's
not
one
blockchain,
so
it
really
depends
on
in
which
ecosystem
you're
currently
living.
So,
for
example,
I
think
when
we
talking
about
zolana,
I
would
say
start
with
a
definite,
so
you
don't
need
to
lost
your
own
notes.
B
You
can
participate
to
that
if
you
want
to,
but
if
you
want
to
program
so
like,
if
you
want
only,
you
are
only
interested
to
write
your
program
like
we
did
now
with
the
hello
world
and
doing
all
the
rust
stuff
here
and
shipping
these
lines
of
code
use
existing
nodes
or
starting
with
your
local
ones.
In
cid
I
didn't
tested
it
yet.
So
we
have
only
a
few
projects
with
zolana
right
now
and
for
ethereum.
Are
we
running
mostly
also
the
public.
A
B
A
B
Because
it's
a
little
bit
simpler
locally
to
see
how
many
transactions
are
passed
instead
of
a
definite
and
then
you
can
easily
see
and
you
can
restart
from
stretch
again.
This
is
why
I
really
like
it.
You
can
also
do
this
with
serum,
but
it's
a
little
more
effort.
So
for
that
we
have,
I
don't
know
if
it
was
called
ganache.
I
think.
B
Interesting
is
the
location
for
so
one
click
blockchain
and
then
you
can
deploy
ethereum
and
doing
all.
And
here
you
see
this
address
is
a
little
bit
different
to
our
zolana
address,
but
this
is
only
a
public
key
encoded
in
hex
and
base
58
yeah,
but
yeah.
So
there
are
different
types
of
using
which
tool
and
which
blockchain
the
atro
system
is
also
different
so
and
also
how.
A
A
A
So
I
I
really
think
it's
great
how
you
showed
what
what
is
power
server
and
how
to
use
the
tools
and
how
to
like
start
the
components
deploy,
deploy
the
programs
and
yeah.
If
you
then
want
to
develop
it
or
test
it
use
the
sas
offering
or
the
cloud
and
don't
try
to
self-host
everything,
especially
if
you,
especially
when
you're
collaborating
with
teams
across
continents.
Probably
it
depends.
B
Also,
a
little
bit
on
your
on
your
learning
curve,
so
I
would
start
now
with
the
newer
chains
instead
of
the
old
ones,
because
the
old
ones
are
a
little
bit
more.
You
find
a
lot
of
old,
outdated
resource
on
that
and
solana.
Porter
dot
have
a
lot
of
more
better
developer
experience.
I
would
say
it's
not
so
abstract,
and
this
is
what
I
really
liked
on
that
so
and
the
examples
are
more
clear.
Sometimes.
A
Yeah,
there
are
probably
some
there
are
many
people
out
there
on
on
twitter
and
and
in
the
community,
who
can
help
and
engage
with
I've.
Been
I've
been
following
nada
david?
Who
was,
I
think,
at
aws
and
and
changed
into
a
blockchain
a
while
ago,
and
I
always
was
like-
I
want
to
learn
how
this
works,
but
I
have
no
idea,
and
it's
for
me:
learning
is
learning
by
example.
A
B
But
you
should
really
check
out
from
nadavi
tutorials
they're,
really
good,
so
for
first
time
developing
and
also
what
these
he
wrote,
also
an
excellent
blog
post
about
what
is
web3
mostly
and
what
it's
not.
So,
it's
quite
interesting
and
he
wrote
there
just
like
this
is
a
really
good
resource.
So
you
should
check
out
his
defto
account
where
he
has
all
his
purpose
mostly,
and
there
is
also
full
guide
for
doing
something
on
this
film.
I
think
not
on
zolani
yet
or
checking
youtube
videos.
A
A
B
B
Yeah
mastering
if
you
want
to
start
really
understanding
the
concept
so
the
best
book,
it's
people
would
say
it's
outdated,
but
it's
like
bringing
you
the
basics.
It's
called
mastering
ethereum,
so
it
gives
you
a
really
good
start
into
the
blockchain
world
because
he's
also
talking
about
dlts
and
that
not
existing
everything.
B
A
B
So
they're
written
in
astrid,
if
you
don't
fit
finding
the
format
android,
you
probably
can
read
it
also
there,
but
it's
slightly
good
resource.
I
think
there
are
also
some
other
on
that.
I
would
not
look
like
into
the
topics
of,
as
I
said,
nfts
and
all
this
stuff.
We
can
make
a
separate
session
on
that
so
because,
mostly
when
we're
talking
about
nfts
and
on
coins,
these
are
only
specialized
smart
contracts.
In
the
end,
nothing
more
so
yeah.
A
I
don't
know
where
to
put
in
blockchain
it's
a
devsecops
somewhere
in
between,
so
anna
is
joined,
backward
security
and
she
wants,
wants
to
join
us
and
dive
into
drivey,
starboard,
cube,
hunter
and
and
other
things
and
said.
Okay,
then,
let's
dive
into
a
little
bit
about
security,
which
is
the
first
no,
the
second
tuesday
of
march,
should
be
march,
8th
and
again
april.
A
A
A
B
A
But,
let's
see
about
it
next
month
will
be
security
and
then
yeah
open
open
to
suggestions,
and
obviously
we
talked
about
a
little
bit
about
over
time.
Again,
I
will
upload
the
recording
later
to
youtube
yeah
and
until
then
I
wish
everyone,
a
great
rest
of
your
day,
stay
healthy,
stay,
curious
and
we
will
meet
each
other
again.
On
march,
the
8th.