Espresso and Polygon Labs partner to address rollup interoperability

Espresso
Systems,
a
shared
sequencer
developer,
has
partnered
with
Polygon
Labs,
an
Ethereum
layer-2
scaling
solution.
The
collaboration
is
meant
to
build
out
and
produce
an
aggregation
layer
(AggLayer)
that
could
solve
the
problem
of
fragmented
liquidity
across
interoperable
rollups.

AggLayer,
first
introduced
in
January,
is
designed
to
enable
transaction
verification
across
multiple
chains
using
a
process
called
“proof
aggregation.”
This
ensures
that
transactions
across
its
ecosystems
are
valid
without
relying
on
third-party
bridging
solutions.

Documentation
from
Polygon
Labs
state
that
all
transactions
will
be
guaranteed
on
AggLayer,
providing
a
seamless
experience
for
users.

“Blockchains
today
don’t
look
or
feel
like
the
Internet.
Instead
of
a
unified,
highly
scalable
network,
users
face
scaling
limitations
and
bad
UX
due
to
fragmented
liquidity
and
state,”
Polygon
Labs
said.

The
Espresso
Shared
Sequencer
is
a
decentralized
system
that
serves
as
a
sequencer
and
data
availability
point
to
connect
a
variety
of
L2s.
With
such
an
infrastructure,
the
credibility,
interoperability,
and
alignment
with
Ethereum,
are
enhanced
to
better
achieve
autonomy,
neutrality,
and
collaboration
among
EVM
chains.

“Our
respective
teams
have
been
thinking
deeply
about
layer-2
interoperability
over
the
last
year
—
it’s
amazing
to
see
our
solutions
converge
in
such
a
synergistic
way,”
Espresso
Labs
CEO
Ben
Fisch
said
in
an
interview.

Other
projects
such
as
Nil
Foundation
are
also
building
out
either
modular
or
integrated
approaches
to
solving
scalability
in
Ethereum.
For
comparison,
projects
such
as

zkSync
are
pursuing
“vertical”
scaling,
while
Nil
Foundation
is
building
on
“horizontal”

scaling
with
the
idea
of
embedding
the
sequencer
to
a
protocol
to
enable
transactions
across
different
shards.

Espresso
has
received
significant
funding
in
the
past,
including
$28
million
in
a
Series
B
round
led
by

a16z
crypto.
Notably,
Espresso
serves
as
a
marketplace
for
shared
sequencing,
allowing
rollups
to
auction
the
rights
to
build
their
blocks.
This
market
enables

rollups
to
offer
sequencing
timeslots
to
shared
sequencers
through
an
auction.
Espresso,
on
this
end,
will
act
as
the
coordinator
that
unifies
the
interdependent
rollups
prior
to
settlement
on
Ethereum.