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@Arc HAS NO MEMPOOL.
READ THAT AGAIN.
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Every blockchain you've interacted with has a mempool.
A public waiting room where your transaction sits, visible to everyone, before a block producer decides to include it.
Arc doesn't have one.
Not a private mempool.
Not an encrypted mempool.
The concept doesn't exist in the architecture.
This is documented, open source, and published - yet I haven't seen a single person in the ecosystem talk about it.
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HOW EVERY OTHER CHAIN WORKS
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When you submit a transaction on any major blockchain, it enters a mempool, a gossip-relayed pool of pending transactions.
Block producers scan this pool, select transactions (often prioritizing by fee or extractable value), and assemble them into a block.
During that window between submission and inclusion, your transaction is publicly visible.
This visibility is the root cause of:
โข Frontrunning
โข Sandwich attacks
โข MEV extraction
This has been the standard model since Bitcoin.
Every EVM chain.
Every Cosmos chain.
Every L2.
All of them rely on mempool gossip as the entry point for transactions into consensus.
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WHAT ARC DOES INSTEAD
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Arc's consensus engine - Malachite - operates on compact payload references, not full transaction data.
Here's the actual flow documented in Arc's architecture:
โ Transactions are collected and packaged into payloads
โ Only the payload hash (a compact identifier) is broadcast to validators on the consensus path
โ The actual bulk transaction data travels on a completely separate, dedicated dissemination channel
โ Validators reach consensus on payload references (kilobytes), while megabytes of transaction data move independently
The consensus round never touches raw transactions.
The decision loop (latency-sensitive) is decoupled from value propagation (throughput-sensitive).
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WHY THIS ARCHITECTURE EXISTS
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Malachite was built by the team that previously maintained CometBFT (the Go implementation of Tendermint).
They observed firsthand that coupling transaction data with consensus messages creates unpredictable round timing - large transactions inflate consensus message size, causing timeouts and stalls.
Arc's solution:
Remove transaction data from the consensus path entirely.
Validators attest to payload identifiers.
The bulk data arrives via a purpose-built streaming channel with chunking and selective retransmission.
Result:
~780ms deterministic finalization at 100 validators with 1MB blocks.
The consensus round stays bounded regardless of transaction volume.
Source:
"Arc's Deterministic Finality" blog post, https://t.co/oU0IqfaAwx
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THE AMP PAPER
Published Research Most People Missed
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Circle researchers published a paper on arxiv (2605.23677v1) titled the Arc Multi-Proposer Protocol (AMP).
This paper extends the mempool-free concept further:
โ Dedicated proposers collect transactions directly from users
โ Proposers package transactions into payloads and broadcast only compact identifiers to validators
โ Validators attest to payloads via Tendermint vote extensions
โ Certified payloads carry bounded inclusion guarantees - once certified, a compliant validator cannot exclude them from the next block
The paper explicitly states this was designed to address concerns raised by the Bank for International Settlements that validator-driven transaction manipulation constitutes behavior that would be "illegal in traditional markets."
This is peer-reviewable, published academic research from Circle's protocol team.
Not speculation.
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WHAT THIS MEANS FOR
INSTITUTIONAL FINANCE
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When a financial institution settles a large trade onchain, the transaction cannot afford to sit in a public mempool where counterparties or searchers can observe and trade against it.
Arc's architecture eliminates that exposure window by design.
There is no stage where a pending transaction is publicly visible before finality.
The path is:
Submission
โ Payload packaging
โ Certified inclusion
โ Finalized block
Sub-second.
No intermediary visibility.
This is the architectural reason Arc positions itself for the Internet Financial System - not marketing language, but a protocol-level design choice that makes institutional settlement viable without bolting on privacy layers after the fact.
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THE MEV ANGLE
NOBODY IS DISCUSSING
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Most chains attempt to solve MEV retroactively:
โข Private mempools
โข Order flow auctions
โข Encrypted transaction pools
โข Commit-reveal schemes
โข Fair ordering services
Arc's approach:
Eliminate the architectural surface where MEV originates.
No mempool means no pre-inclusion visibility.
No pre-inclusion visibility means no extractable value from transaction ordering knowledge.
This isn't a feature added on top.
It's a structural consequence of separating payload references from transaction data at the consensus layer.
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SOURCES
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โ Arc Node ARCHITECTURE.md (GitHub, circlefin/malachite)
โ "Arc's Deterministic Finality" blog post (https://t.co/oU0IqfaAwx)
โ "Arc's Bespoke Consensus Layer" blog post (https://t.co/oU0IqfaAwx)
โ AMP paper: https://t.co/IKaWg1M8QN
โ Malachite consensus engine (open source)
Every claim above is from published documentation, open-source code, or peer-reviewable research.
Nothing here is speculation or roadmap projection.
The architecture is live.
The paper is public.
And somehow, most are not talking about it.
this is why building on @USDC and @arc makes sense.
Circle getting national trust bank approval isn't just a headline - it's the regulatory foundation that lets products like PayX exist. Social payments in USDC, tips over X, no buyer-side setup.
@circle clearing the compliance path means builders on Arc can focus on UX instead of guessing where the line is.
excited to keep shipping PayX in this environment.
congrats @circle
Most stablecoins are sitting still.
Every minute they're idle is capital that isn't being deployed, earning, or moving where it's needed.
In traditional finance, idle cash carries an opportunity cost. In DeFi, that cost is even higher.
At XyloNet, we think stablecoins should be programmable capital, not static balances.
That's why we're building infrastructure that lets liquidity move seamlessly across chains, access yield through Vaults, and power real payments with PayX all without forcing users through fragmented bridge and swap experiences.
The future isn't just owning stablecoins.
It's putting them to work.
Arc ๐ค XyloNet
This partnership is about proving that stablecoin-native infrastructure can support both deep DeFi and real consumer payments without compromise.
We built XyloNet on @Arc Testnet because Arc treats USDC as a first-class citizen, not just another bridged asset. Native USDC gas means users never need to hold a separate volatile token to pay fees.
Deterministic sub-second finality means transactions settle clean instead of hanging in ambiguous states. And CCTP V2 with Fast Transfer means crosschain USDC moves as native USDC in minutes with one signature. These are not convenience features. They are the foundation that lets us ship a full stack and a consumer payment flow on the same settlement layer.
What we shipped
XyloNet brings the DeFi primitives. A StableSwap AMM for USDC and EURC with Curve-style invariant math. Composable liquidity pools with standard LP tokens. Programmatic CCTP V2 bridging. And ERC-4626 vaults that auto-compound yield. Each contract is modular so builders can compose with one piece without inheriting the whole system.
PayX brings the consumer layer. It lets anyone tip an X handle in USDC before that person has ever opened a wallet. Funds sit in smart contract escrow on Arc, keyed to the handle. The recipient verifies their X identity and claims to any wallet they choose. Identity resolves at claim time, not send time, which makes the pattern reusable for emails, usernames, or any offchain identifier.
Why this matters together
Most chains force a choice. You can build DeFi infrastructure or you can build consumer UX. Arc lets us do both on the same layer because the settlement is built around stablecoins from the ground up. One gas token. One finality model. One bridging standard. From liquidity pools to tipping a stranger who has never heard of a seed phrase.
That is what this partnership represents. Arc provides the stablecoin-native settlement layer. XyloNet and PayX prove what builders can do with it. The contracts are live on testnet. The patterns are open to adapt. The next team should not have to solve the same problems from scratch.
Try the stack. Swap. Bridge. Tip someone. See what it feels like when the infrastructure was actually built for this.
GIVING AWAY 5 QODER PRO SUBS - BECAUSE YOUR DEADLINE DOESN'T CARE IF YOUR TOOL WENT DOWN
Premium models, 2000 credits/month, Quest, Repo Wiki, the full stack. For 5 builders who keep shipping no matter what - already deploying or just getting started.
Like + RT. Quote this with what you're building + how Qoder Pro takes it further. Tag a builder - if they enter too, you both get double the chance.
Winners in 48 hours.
@qoder_ai_ide
Really glad to see @goldskyio in the @Arc ecosystem ๐ค
We were using Goldsky subgraphs earlier for XyloNet before the Arc Testnet support was deprecated, and honestly, the experience was great.
Super fast indexing.
Reliable infra.
Easy integrations.
One of the best services out there for handling onchain data and subgraphs.
Weโll definitely be using Goldsky again for indexing across XyloNet products.
This is the kind of infra support builders on Arc actually need.
https://t.co/orv7vL3o1Y
the stablecoin era is here. and it needs real infrastructure
that's what we've been building with @Xylonet_ - a complete financial layer for stablecoins, on @Arc
XyloSwap- a DEX built specifically for stablecoins, not retrofitted for them. runs on the same StableSwap math that Curve pioneered - designed so that swapping between pegged assets like USDC, EURC costs almost nothing in slippage. 0.04% fee. trades land in under 350ms. this is what stablecoin trading should feel like
XyloBridge- native USDC across chains - not wrapped, not synthetic. we use Circle's CCTP V2 which means when your USDC lands on Base or Arbitrum or Ethereum, it's the real thing. 20+ chains connected. no custodians, no trust assumptions
XyloVault- your stablecoins shouldn't just sit there. XyloVault puts them to work - deposits go into USYC, US Treasury-backed tokenized assets. your position auto-compounds. built on ERC-4626 so it's composable with anything in DeFi (real USYC coming soon)
PayX- tip anyone on X in USDC. one click. they don't need a wallet, don't need to know what a blockchain is - funds sit in an escrow contract until they claim via their Twitter login. this is the version of crypto payments that actually makes sense for the real world
XyloFacilitator - coming soon
the infrastructure layer for AI agents to make USDC payments autonomously. built on the x402 standard - agents pay for API calls in real USDC, no SDK needed, sub-second settlement on Arc. and AgentEscrow is what it unlocks: two AI agents negotiating a freelance contract, staking bonds, verifying deliverables, releasing payment - zero human involvement. the agentic economy needs a payments layer. this is it
everything on XyloNet is stablecoin native - fees, gas, yield, payments - all in USDC. built on Arc because Arc was designed for exactly this
XyloNet. the stablecoin superexchange.
๐ฎ๐ณ Namaste, India. Letโs build on @arc.
Arc has officially opened the India Regional Chapter inside Arc House - bringing together Indian devs, founders, researchers & communities under one roof.
If youโre building in AI, crypto, infra, agents, apps, tooling, or research, this is your chance to connect with builders from across India and grow together.
India is building. India is shipping. India is ready ๐ฎ๐ณ๐ฅ
My first post in India Regional Chapter:
https://t.co/D9hTfU0Ue8
Link to Arc House Regional Chapter - India is in the pinned comments ๐
Interesting how @Polymarket quietly introduced trader tiers, weighted volume, rebates, and liquidity incentives.
Feels like the platform is preparing for a much larger ecosystem than most people realize.
#polymarket $Poly @Polymarket
Introducing XyloFacilitator - the first hosted x402 facilitator-as-a-service on Arc.
There are a lot of x402 facilitators in production today.
Zero of them run on @Arc.
The only chain that settles in under a second.
The only chain where gas is USDC.
The only chain with built-in privacy for transactions.
Every single one chose Base, Polygon, or Solana instead.
That changes.
With XyloFacilitator:-
Any developer registers, sets their API prices in USDC, and AI agents start paying immediately.
No infrastructure.
No nodes.
No SDK on the buyer side.
And on top of it - AgentEscrow.
Two AI agents negotiate a contract, stake performance bonds, submit deliverables, verify the work autonomously, and settle autonomously.
Every step - a nanopayment flowing through XyloFacilitator on Arc.
@corey__cooper asked for a hosted x402 facilitator on Arc.
@jerallaire said heโd like to see teams build agents that sign contracts.
Both. On Arc. Building now.
Launch + More details soon...
Built by @Xylonet_
you're on X, you see a tweet that hits different, and you want to actually pay the person who made it
not a like. not a retweet. @USDC - onchain, instant, no wallet needed on their end
that's PayX. built on @Arc . the tip sits in escrow until the creator shows up, connects their X account, and claims it. nothing more
chrome extension puts the PayX button right next to every tweet. one click and it's done
this is live right now.
Built by @Xylonet_