►
From YouTube: Ethereum Core Devs Meeting #16 [5/19/17]
A
I
made
a
couple
of
suggestions,
so
basically
what
we
want
to
have
is
we
want.
We
wanted
to
be
possible
to
figure
out.
What's
the
gas
cost
of
the
whole
thing
is
in
O
in
O
of
one
time
and
in
O
of
one
memory
reads
so
the
suggestion
I
had
for
mod
X
was
that
we
would
take
the
bit
length
or
sorry
the
byte.
A
We
would
take
me
at
the
byte
length,
then
we
would
look
at
just
the
first
byte
and
if
the
first
byte
has
is
that
has
less
than
eight
bits,
then
we
will
kind
of
appropriately
discounted.
So
at
one
example
would
be
that
if
you
have
three
bytes
and
the
first
byte
is
255,
then
the
exponent
likes
to
be
counted
as
24.
If
it's
three
bytes
and
the
first
byte
is
let's
say
three,
then
the
byte
length
will
be
counted
at
18.
A
Or
not,
I
think
so
to
determine
on
the
elliptic
curve
side,
I'd,
say
and
possibly
just
I
mean
agree
on
preliminary
gas
costs
for
the
purpose
for
the
purposes
of
testing
and
then
maybe
or
or
perhaps
holes.
The
other
thing
we
could
do
is
just
have
a
like,
but
you
know
it
takes.
The
practical
thing
to
do
is
that
we
agree
on
some
preliminary
gas
cost
for
testing
purposes.
A
Then
we
get
to
the
point
where
we're
passing
the
test,
and
then
we
actually
see
how
many
milliseconds
they
take
C++
go
and
parity
to
run
through
some
of
the
tests,
some
of
the
test
cases
and
we
go
from
there
to
figure
out
what
the
final
values
are.
Always
that's
one
approach
on
the
mod
X
side,
I
think
we
would
need
to
first
of
all
figure
out
in
principle.
What
is
the
right
like
whether
or
not
we're
going
for
this
bit
length
approach?
And
if
so,
what?
B
A
E
C
A
I
would
argue
that
there
is
not
much
benefit
in
making
multiplication
depends
on
the
size
of
the
scalar,
because
pretty
much
all
multiplications
I've
ever
encountered
in
cryptography,
multiplied
by
a
random
236
bit
numbers
and
so
I.
Don't
think
we
really
lose
much
by
just
going
straight
to
the
work
with.
C
F
C
A
C
C
G
Kids
of
them,
if
anyone
can
hear
me
yeah,
the
idea
was
there
to
accommodate
the
fact
that
we
have
256-bit
the
memory
stores,
so
crafting
did
request
the
kind
of
demise
for
2056
bit
and
but
the
content
might
be
much
less.
So
what
if
we
only
care
the
topmost,
256-bit
and
assume,
if
say,
the
exponent
is
like
it
has
in
bits.
We
assume
that
the
bottom
700x
bits
must
be
set
and
we
only
considered
top
two
and
56.
So
then
it's
only
you
know.
The
exposure
is.
E
C
A
Yes,
so
basically,
the
other
concern
I
have
is
that
I
wanted
to
just
basically
like
kind
of
accentuate
the
fact
that,
with
the
fact
that
the
revert
opcode
can
return
things
we
actually
like.
Basically,
it
was
a
Joseph
for
BBC,
really
really
pointed
out
that
we
actually
are
making
a
major
economic
change
which
we're
always
a
significant
economic
change,
which
in
some
ways
does
break
BBC,
release
current
model
and
the
change.
A
But
basically
the
problem
is
that
BBC
relay
works,
and
potentially
a
lot
of
there
were
other
applications,
might
also
work
by
charging
some
very
small
amount
in
exchange
for
give
our
give
reading
some
some
value
from
the
contract
stage
yeah.
So
the
idea
that
it
was
one
way
to
do
a
paid
Oracle
and
with
the
revert
up
code,
what
you
can
do
is
you
can
basically
call
to
a
contract,
then,
in
from
it
from
the
contract,
make
a
call
to
be
deeply
relay
or
whatever
other
thing
get
the
response.
A
Then,
in
the
outer
contract
he
would
use
the
revert
opcode
and
you
have
revert
the
response,
and
this
way
the
payment
that
you
would
make
that
you
want
to
make
for
an
exchange,
for
the
response
will
be
reverted,
but
you
would
still
get
the
data
out
and
so
I'm
based.
This
is
something
that's
not
not
possible
to
do
easily
now
so
right
now.
B
You
know
we
discussed
this
a
few
weeks
ago
and
so
I.
That's
why
I
open?
Let's
take
it
against
me
to
see
relay,
but
the
thing
is
that
even
without
return
data,
you
can
always
see
the
same
thing
with
the
river
can
return
wrong
based
at
a
time,
so
you
can
do
an
Oracle.
You
can
query
because
you
realize
this
hundred
valid
invalid
guesses
fact.
If
you
don't
all
you
want
wait.
B
The
exchange
you
can
extract
long
bit
of
information
that
way,
and
you
can
do
it
yes,
one
way
to
do
it
today
is
the
magic
with
what
you
mentioned
in
other
ways
to
actually
use
throw.
You
can
do
it
the
same
way,
but
it's
much
more
complicated
because
especially
will
be
the
serial
a
is
not
constant
how
much
it
costs,
so
it
will
be
easier
to
do
that
with
something
which
is
constant.
B
H
J
I
I
Think
for
the
property
that
we
should
strive
particularly
hard
to
protect
because
doing
so
disables
other
useful
use
cases
and
ultimately,
once
the
data
is
posted
to
the
public
blockchain
relying
on
a
special
barriers
and
the
V
into
proving
people
from
reading
it
just
seems
I
can
seems
like
the
wrong
approach
to
take.
Ok,
that's
there.
B
J
J
J
J
H
The
triviality
in
Vig
96
256
blocks
into
Metro
Police,
the
blog
has
instruction,
can
change
its
internal
working
and
then
the
same
et
auto
says
the
gas
cost
for
broke
has
should
change
from
twenty
to
eight
hundred
or
something.
My
question
is
it
just
cause?
Change
should
happen
at
the
first
block
of
the
metro,
police
or
256
dogs.
After
that.
J
J
H
J
I
I
H
I
H
H
A
Think
one
thing
I'd
suggest
this
it
just
as
an
as
an
experiment
see
if
we
can
kind
of,
but
basically
I
want
to
see
how
long
would
it
would
it
take
to
do
a
million?
Basically,
a
million
rounds
of
crawling
these
yet
I
delegate
calling
the
black
hash
contracts
over
and
over
again
just
to
see
that
if
someone
decides
to
exercise
to
implement
a
kind
of
history
free
implementation,
then
you
know
what
they
have,
what
they
infer
any
debt
and
like
extra
difficult
is
there.
I
A
What
I'm,
trying
to
make
it
possible
to
do
is
I'm
trying
to
make
it
positive,
I'm,
trying
to
make
it
possible
to
make
an
implementation
of
the
of
the
protocol.
That
does
not
depend
on
any
kind
of
history
access,
that's
not
in
the
state
and
that
doesn't
require
any
kind
of
additional
weird
data.
We
are
data
structures,
in
which
case
implementing
the
blog
hash
table
code,
would
be
basically
just
either
calling
that
contract
or
just
reading
reading
a
storage.
A
Once
and
now,
we
could
of
course
argue
that
those
particulars
for
storage
fees
are
going
to
end
up
being
in
the
cache.
So
it's
done
it.
It's
it's
not
like.
This
is
a
particularly
serious
issue,
but
I'm
basically
trying
to
wonder
if
xx,
520
gas
is
low
enough
for
that
kind
of
implementation,
or
whether
it's
something
slightly
higher
would
make
sense.
I.
G
J
F
A
So
there
is
actually
that's
three
different
ways
to
implement
this.
One
of
them
is
to
execute
to
get
one
of
these
execute
the
code.
One
of
them
is
to
read
that
particular
account.
Storage
I'd
also
argue
that
a
discount
might
be
prudent,
because
if
someone
tries
to
call
this
contract
a
whole
bunch
of
plans
and
all
just
end
up
being
in
the
cache,
on
the
other
hand,
oh
I
could
see
how
it's
about
how
how
it
would
be
kind
of
a
very
principled
upper
bound
to
calculate
the
exact
spots
in
charge
that
so
yeah.
A
A
H
H
A
Biggest
correct
so
by
call
I
mean
a
call
of
I
mean
a
call
from
medium
and
that's
how
I
usually
use
the
word
call
but
I'm
happy
to
clarify
that,
so
the
notes
would
not
to
be
incremented
correct,
so
the
code
pathway
that
you
should
use
to
implement.
Yet
you
know
each
X
should
be
the
same
or
that
you
would
European
like
the
coop
code.
A
H
H
My
last
point
is
actually
well,
maybe
not
via
triviality.
It's
about
the
211
return
date
copy.
When
returned
a
copy
wants
to
copy
more
than
returned
what
should
happen?
I'm.
Currently,
the
body
of
the
text
says
the
between
zeros
that's
the
same
as
ordered
copy,
but
Nick
suggests
exceptional
old
I
think
both
reasonable
I
think
at
least
we
should
gather
opinions
here,
I'm
glad
to
be
jail.
Convinces.
H
H
D
I
Having
a
light,
as
I
said,
I
I
think
consistency
is
a
weaker
argument
firm.
This
is
the
wrong
thing
to
do
is
like
a
really
should
be
consistently
wrong.
A
friction
avoid
a
I'm
going
to
say
that
I
hope
yours
over,
because
there
is
at
least
one
contractor
named
above
chain
that
will
fail.
If
my
copy
that's
right
now
is
called
out,
a
copy
throws
an
exception
because
it
deliberately
reads
for
bite
asking
it:
okay,
so.
C
I
I
C
I
Size
and
what
you
here
is
back
for
discussion,
I'm,
fine,
arguing,
listen,
Anna
vacuum
I!
Think
surely
that
reading
past
the
end
of
the
range
with
the
in
error,
because
the
the
data
should
be
undefined
and
not
just
silently,
filter,
zeros,
I,
can't
think
of
a
single
situation.
We
are
filling
in
seriously
good
thing.
I.
H
L
Agree
with
Nick
that
it's
totally
wrong
that
we
treat
it
that
way,
I've
been
told
it
made
the
description,
mathematically,
simpler,
I,
don't
know
if
you
can't
opinion
on
that.
I
also
agree.
I
wouldn't
want
to
extend
the
mistake
beyond
the
domain
it's
currently
in
and
yes,
if
we
insist
that
gum,
then
all
code
is
going
to
be
validated
before
it's
run.
We
can.
We
can
catch
things
like
this
much
more
easily
and
I.
Think
that
take
Martin's
I
believe
that
would
be
true
for,
as
am
also.
L
F
C
I
I
M
I
Yeah
signing
the
same
would
seem
to
applies
the
called
out
of
the
cop
that
you
can't
statically
determine
all
cases
whether
it
can
ever
happen.
But
you
can
you
can
if
it's
impossible,
you
can
say
social
servant,
but
if
it's
possible,
you
just
have
to
say
maybe
exactly
and
I
think
the
same
would
go
for
called
us,
obviously
into
the
array.
H
A
Basically,
they
like
the
idea
that
I
believe
that
all
coaching
with
the
RO
because
of
like
actual
out
of
gas-
and
that
mean
anything
that
happens
after
the
out
of
gas
step,
it
should
is
a
it-
should
look,
basically
not
throw
under
any
circumstances
and
rolling
on
bad
return.
Call
I
data
would
in
a
inflict
was
bad.
I.
J
Think
that
that
confuses
developers,
or
at
least
when
I'm
developing,
like
everyone
I've,
talked
to
the
thing
they
have
the
most
problems
with,
is
the
fact
that
throws
don't
act
as
a
lot
of
modern
programming
languages
would
act
when
something
is
thrown.
It's
not
always
just
one
single
error.
It's
usually
gives
a
little
more
indication.
So
if
there's
any
interest
and
providing
more
information
on
throws
in
the
future,
I
think
this
would
be
a
good
first
step
personally.
Well.
J
J
A
J
A
Go
back
on
just
to
go
better
on
that
one
point:
one
thing:
I
realized
is
that,
back
back
when
we
were
discussing
the
IP
five
versus
the
FDA,
it
sources
returned
data
copy
and
so
forth.
I
recall
one
of
the
one
other
proposal
being
being
so.
The
original
problem
that
we
were
trying
to
solve
is
basically
how
do
you
deal
with
variable
size,
returned
data
and
I?
Remember
one
of
the
proposals
being
that
you
would
so
right
now.
A
So
a
nice
solution,
except
that
I,
remember
that
it
ended
up
falling
out
of
favor
precisely
because
it
introduced
this
or
this
idea
that
we
get
an
operation
inside
the
VM
lights.
The
row,
because
of
something
because
of
the
actual
execution
of
the
operation,
and
not
just
because
of
yet
because
of
initial
gas
computation
issues.
And
so,
if
we're
willing
to
abeyance
in
that
principle,
perhaps
would
be
willing
to
go
right
back
to
yeah,
b5
and
EAP
8.
Whatever.
C
That
there's
still
a
big
difference
here,
so
the
accessing
returns
later
beyond
its
length
can
be
I
mean
it
is
there
is,
there
are
even
the
other
core
proposal
there.
The
error
condition
would
only
be
checked
after
the
Kali
returned
it,
which
is
a
much
later
point
in
time
than
point
where
you
read
the
inputs
for
a
return
date.
A
C
D
C
B
C
E
J
Would
you
have
any
other
comments
on
that
metallic?
No,
that
was
the
only
comments
ad
okay,
yeah,
okay,
so
I
think
it
still
stands
that,
because
some
opinions
have
shifted
or
become
less
strong
on
the
fact
that
we
can,
you
know,
throw
for
things
other
than
just
being
out
of
gas
Ayers
that
we
can
be
that
that
is
still
the.
The
conclusion
is
still
that
on
that
a
I
P,
the
behavior
would
be
throwing
an
error
rather
than
filling
with
zeros
I
guess,
yeah,
okay,
cool
I,
think
I.
Think
I
followed
all
that.
H
We
Dimitri
Mattias,
Linda
and
I
had
a
core
on
Monday
discussing
the
testing
for
Metro
quarries.
There
was
an
agenda.
There
was
a
topic
how
how
much
shows
the
test
of
the
covers?
We
couldn't
answer
because
we
eat
a
still
changing
and
some
of
the
books
table,
but
there's
no
indication
that
this
table
looking
geek
will
not
change.
So
we
don't
know
how
many
obliques
will
not
change
and
we
don't
know
how
many
test
cases
ready.
H
So
my
proposal
is
to
introduce
a
notion
of
freezing
a
need
for
Metro
Police
and
after
a
nip
is
frozen
for
Metro
Police
page
that
it
cannot
change
until
Metro
Police.
If
there
is
such
fear
program,
tips
can
be
dropped
from
Metro
Police
or
if
the
sticks
is
very
easy,
and
everybody
says
where
we
have
enough
time
to
test
it
from
this,
can
this
change
can
be
made,
but
the
customers,
the
unanimous
everybody
agreed
both
in
the
orders
meeting,
and
my
question
now
at
this
point-
is-
shall
be
satisfied
to
write
on
the
meta.
H
J
J
Yeah
I
think
that'd
be
good
and
people
can
also
close
their
eat,
their
PRS
or
whatever
or
put
a
comment
saying
I'm
done
and
then
the
editors
will
go
in
and
you
know
approve
it
add
it
to
the
repository
and
then
actually
close,
the
PR
and
any
you
know,
issues
related
to
that.
It
only
reopen
if
necessary.
J
All
right
awesome.
The
next
item
is
any
subtleties.
We
need
to
work
out
with
regards
to
metropolis.
Does
anyone
have
anything
on
their
mind
as
far
as
a
subtlety
or
something
that
may
have
not
may
have
not
been
discussed
or
we
need
to
discuss?
I?
Think
metallic.
You
wrote
that
as
a
topic,
did
you
have
anything
in
mind?
I.
A
Didn't
have
anything
actually
I
think
I
might
have
had
so
well,
there's
the
one
but
I've
been
talking
about
for
a
while,
but
that
we
actually
I
guess
technically,
it's
part
of
you
I
think
it
might
be
part
of
eBay
t6
that
creating
a
contract
sales,
if
it
already
has
if
the
the
destination
address
already
has
code.
But
I
was
more
thinking
in
mind
like
smaller
things
that
have
to
do
with,
like
the
way
that
non-sync
romantic
works
for
gas
calculation
or
I
call
their
boring
details
about
storage.
J
That
sounds
like
it
would
be
need
to
be
defined
in
the
EEP
and
as
implementation
goes
through.
I
feel
like
people
would
ask
those
questions,
but
yeah
everyone
should
feel
free
to
voice
those
concerns
in
both
of
the
eeap's
and
all
core
dev,
chats
I
know
you
eat
she's
been
good
about
that
when
he's
been
applying
them
to
the
yellow
paper.
B
J
J
C
A
See
actual
projection,
so
it
takes
the
original
used
motivating
uses.
What
was
it
was
so
that
contract
could
refund
the
transaction
senders
for
gas
payments,
but
I
would
say
with
that.
Yet
EBT
success
not
rolling
that
theory,
because
we
can
open
up
ways
where
any
contracts
down
the
chain
for
just
paper
gas
directly.
J
I
F
J
Okay,
great
instigator,
so
as
far
as
the
time
estimates
and
testing
and
release,
let's
first
just
kind
of
go
through
the
teams
and
see
where
everybody's
at
we'll
start
with
you
eg.
Since
he's
been
doing
some
of
the
yellow
paper,
stuff
and
I
think
what
we've
talked
about
today
is
kind
of
outlined
where
you're
at
basic.
H
Now,
no
maybe
so:
here's
yeah
okay,
we
thought
we
were
jobs
from
the
internet.
The
yellow
paper,
so
I
have
created
an
appear
pretty
great
for
every
keep
considered.
Po
metro,
police
I
believe
it.
They
are
mostly
up
to
date,
Chris
deep
and
yeah
some
predictions
made
about
well
that
that
was
a
great
day.
That's
a
little
bit
of
data
I'll
be
meeting
the
metropolis
changes
in
city
paper
in
with
them
on
the
parity
and
I'm
halfway
through
it
up
quick
Adam
back
on.
J
M
J
M
Our
consensus
issue
is
then
JSON
files
for
month
and
how
integers
encode
it
in
different
files
for
that,
so
so
on
from
fightin
teams
and
insists
that
integer
should
not
be
perfect
by
you
leading
zeros
and
and
the
foil
singlet.
It's
nonsense:
cool
graphics
for
other
0x,
perfect
for
contract
crashes
and
other
hashes.
So
we
have
an
quite
a
finishes
and.
J
Okay,
well,
what
let's
do
this
the
eats
out
there?
So
if
anybody
here
who
has
who
does
submit
this
kind
of
test
files
could
go
in
and
comment
and
if
no
one
or
if
not
enough
people
comment
on
it,
we
can
pull
in
some
people
who
submit
and
see
if
we
can
come
to
consensus
on
that,
hopefully
soon
so
we
can
get
those
standardized
for
when
we're
submitting
more
for
metropolis
sound
good.
J
J
Okay
sounds
good,
so
the
next
thing
would
be
time.
Estimates
for
testing
and
release
so
I
think
because
of
the
price
spike
we're
given
a
little
bit
more
time
and
it's
looking
like
because
of
the
the
there's
a
lot
more
testing
that
has
to
go
on
because
of
so
many
eats
we
might
need
to
look
to
more
of
a
July
release
is
my
opinion,
but
Alec
I
know
you've
been
thinking
on
that.
What's
what's
your
opinion,
if.
A
A
A
M
J
K
J
K
J
K
N
J
K
J
J
Okay,
so
it
sounds
like
we
can't
really
get
a
block
number
down
today,
but
between
now
and
next
meeting
we're
going
to
have
the
freezing
of
some
of
the
eats
and
we're
going
to
potentially
have
a
little
more
standardization
with
the
and
also
we
can
start
looking
at
what
it
would
take
to
do
an
alternative
to
just
using
what
Robson
is
today
and
doing
either
a
reboot
or
some
type
of
configuration,
change.
Okay,
see,
I,
think
you
already
looked
because
you
were
involved
in
getting
Rob
stand
back
on
its
feet
a
few
months
ago.
G
J
I
think
that's
an
okay
idea,
except
for
the
fact
that
some
of
these
eeap's
were
decided
on
related
to
other
eats
so
I
believe
static,
Hall
revert
and
a
few
of
those
other
ones
were
all
intertwined
in
a
way
that
made
them
work
together
best
if
they
were
all
implemented.
So
for
something
like
that,
I
feel
like
that
would
be
an
issue.
Am
I
incorrect
and
thinking
that
I
I.
J
J
Yes,
I
could
hear
you
now,
okay,
so
Casey,
just
while
you
were
gone,
Casey
brought
up
that
we
likely
would
need
ease
ralston,
because
we
would
need
to
use
a
test
set
that
the
clients
can
all
support.
And
additionally,
if
we
want,
we
can
because
there's
been
a
lot
of
Robson
attacks.
Lately
we
can
do
a
reboot
and
configuration
change
to
like
live
it.
You
know,
guess
or
Mozilla
get
in
Casey.
N
J
Yep
so
that
that's
probably
the
route
will
go
and
then
Dmitry
stated
that
we
wouldn't
be
able
to
really
be
releasing
until
August
and
until
then
we
need
to
figure
out
the
length
of
time
that
a
test
net
would
need
to
be
on,
and
so,
for
instance,
like
the
test.
That
needs
to
run
for
two
weeks
or
six
weeks
or
four
weeks
or
what.
But
what
opinions
that
you
have
on
the
timing
and
anything
like
that.
Metallic
I
am.
A
J
Okay,
yeah.
That
sounds
like
a
fair
point
with
I
guess,
with
the
caveat
of
that
would
be.
If
there
is
an
issue
found
the
I
guess
it
would
be
extended,
in
that
case
correct.
Okay,
that
sounds
reasonable.
So
let's
just
say
this:
it
definitely
won't
be
the
end
of
June
and
if
things
go
right
over
the
next
few
weeks,
we're
going
to
have
a
number
of
things
such
as
freezing
eats
and
some
testing
improvements.
J
Additionally,
if
there
is
anybody
on
this
call
or
who
listens,
who
is
able
to
help
with
testing
and
wants
to
pitch
in
please
reach
out
to
myself,
Demetrio,
Ichi
or
Martin
hosts
one
day,
and
we
can
get
you
hooked
up
on
that.
We
could
use
all
the
help
we
could
get
in
that
area
so
yeah.
If
anyone
can
devote
any
kind
of
resources
that
would
help
move
things
along
for
metropolis.
J
Ok,
I
think
that
is
pretty
much
the
end
of
that.
So
the
conclusion
to
that
bullet
point
would
be
that
we
don't
have
a
date
and
there's
going
to
we're
going
to
know
a
lot
more,
the
next
meeting,
but
it's
definitely
not
going
to
be
into
June
and
the
testing
time
for
the
amount
of
time.
A
test
that
would
be
running
before
we
actually
launch
would
be
at
minimum
two
weeks
and
we'll
have
more
discussion
on
that
next
meeting.
Okay,
let's
see
the
time
we
have
a
couple
of
minutes
so
Christian.
C
C
Developers
also
face
the
problem
that
they
it's
quite
hard
to
see
when
the
user
interface
needs
to
be
updated
and
also
wallet
developers
currently
have
no
way
to
see
whether
an
external
account
get
resistant
transfer
via
an
internal
call.
So
it
might
be
beneficial
to
implement
something
like
yeah
a
listener,
filter
index
data
structure
that
is
filled
or
triggered
whenever
an
account
is
touched
by
anything
inside
a
transaction.
I
I
proposed
thus
ago
Syrian
before
building
blend
filters
for
all
the
accounts
that
were
in
some
way
touched
by
a
request
so
that
he
can
narrow
narrow
down
at
the
time
it
wasn't
usually
popular
because
you
just
elected,
actually
trace
the
calls
in
order
to
determine
what
change
or
you
know,
potentially
take
down
once
before
and
after
the
block,
but
I
still
drink
it.
It
could
be
worth
doing
and
I
guess.
The
other
objection
was
when
I
take
it
or
disfavor.
I
We're
talking
about,
let's
see
about
another,
nine
gigs
and
gigs.
No
sorry,
nine
needs
for
the
same
opens
a
blockchain
applies
over
here
and
which
you
could
probably
expect
and
X
data.
Basically
about
the
same
again
more
so
even
if
we're
using
the
transformed
bloom
filters
that
we're
creating
to
gif.