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ArcSilence

ArcSilence

Arcsilence – Private Execution, Public Settlement.

Created on 4th December 2025

ArcSilence

ArcSilence

Arcsilence – Private Execution, Public Settlement.

The problem ArcSilence solves

The problem Arcsilence solves

On Solana today, every meaningful trade is a public signal:

  • Large swaps, treasury rebalances, and hedging moves are fully visible on-chain.
  • MEV bots can front-run, back-run, or sandwich those trades.
  • Competitors can infer strategies (what you rotate into, when, and in what size).

For DAOs, funds, and POL managers this leads to:

  • Worse execution (higher slippage, worse prices).
  • Long-term alpha leakage (strategies become predictable).
  • Friction for more “institutional” DeFi use cases that expect dark-pool style execution.

Arcsilence removes that “transparency tax” without sacrificing on-chain settlement.


What people can use Arcsilence for

Arcsilence is a private dark pool and rebalancer for Solana, powered by Arcium’s encrypted compute. It can be used to:

  • Rebalance DAO treasuries privately

    • Rotate between stables, LSTs, LRTs, and governance tokens.
    • Avoid pre-signalling “the DAO is exiting X and entering Y” before trades complete.
  • Run fund / market-maker strategies without leaking alpha

    • Execute systematic hedging, arbitrage, or rotation strategies.
    • Hide order sizes, routing preferences, timing, and thresholds from bots and competitors.
  • Adjust protocol-owned liquidity (POL) quietly

    • Move liquidity across pools/venues to optimize yield and depth.
    • Prevent markets from trading ahead of POL changes.
  • Batch larger trades without becoming MEV bait

    • Use Arcsilence as a private execution backend on top of existing DEXs/aggregators.
    • Keep trades verifiable on Solana, but intent invisible while execution is in flight.

How it makes existing tasks easier and safer

Arcsilence changes DeFi execution in three key ways:

  • Safer from MEV and manipulation

    • Orders are fetched from Solana, encrypted, and matched via Arcium MPC.
    • There is no clean, public pre-trade signal for MEV bots to target.
  • Better protection of strategy and IP

    • Matching, sizing, and routing logic run inside encrypted compute.
    • Observers see only final settlements on-chain, not the internal decision process.
  • DeFi-native and composable

    • Settlement still uses Solana programs, SPL token vaults, and DEX integrations.
    • Protocols can plug Arcsilence in as a private execution layer, not a separate silo.

In short: Arcsilence lets serious Solana users keep public settlement and composability, while hiding the sensitive part – their intent and strategy – during execution.

Challenges we ran into

Everything went well
arcium devtools took some time to install and start work on it

Tracks Applied (16)

General Bounty

Arcsilence is a privacy-preserving dark-pool and rebalancing engine that tackles a core primitive needed by any privacy-...Read More

Network School

Privacy Infrastructure & Developer Tools

Arcsilence can be extended into a privacy-first application framework where users keep both their value and interaction ...Read More
Mina Protocol

Mina Protocol

Private DeFi & Trading

Arcsilence is a private dark-pool and rebalancing engine on Solana built directly on Arcium’s encrypted compute for the ...Read More

Arcium

Private DeFi & Trading

Arcsilence is a private dark-pool and rebalancing engine that can be directly extended to a Zcash-backed, privacy-first ...Read More
Aztec

Aztec

Privacy Infrastructure & Developer Tools

Arcsilence is a private dark-pool and rebalancing engine that can also function as privacy infrastructure for Zcash deve...Read More

Electric Coin Company

Private Payments & Transactions

Arcsilence is a private execution layer that can be extended from trading into private payments and transaction routing....Read More
Osmosis

Osmosis

Private DeFi & Trading

Arcsilence is a private dark-pool and rebalancing engine that already separates: Intent layer – orders and strategies, ...Read More

Fhenix

Creative Privacy Applications

Arcsilence can be extended into a playground for creative, composable privacy experiments around trading, strategy, and ...Read More

Fhenix

Private DeFi & Trading

Arcsilence is an unstoppable private DeFi execution layer: a dark-pool and rebalancing engine that hides intent while ke...Read More

Zcash Community Grants

Privacy Infrastructure & Developer Tools

Arcsilence is a modular private execution layer that can be extended into developer tooling around Zcash core. Our arch...Read More

Zcash Community Grants

Self-Custody & Wallet Innovation

Arcsilence can power next-generation self-custody wallets by acting as a “private execution mode” behind a familiar wall...Read More

Unstoppable Wallet

Private DeFi & Trading

Arcsilence is a private execution layer for swaps and rebalancing, making it a natural fit for this prize. Private swap...Read More

Unstoppable Wallet

Privacy Infrastructure & Developer Tools

Arcsilence is a modular private execution layer that can double as privacy infrastructure for other builders, not just a...Read More

Raybot

Private DeFi & Trading

Arcsilence is a private dark-pool and rebalancing engine that can naturally integrate Noah for privacy-preserving DeFi l...Read More

Noah by Plena Finance

General Bounty

Arcsilence is a privacy-preserving dark-pool and rebalance engine that aligns directly with the goals of the General Bou...Read More

Project Tachyon

Private Payments & Transactions

Arcsilence is a private execution layer that can be extended into an innovative Zcash-based payment router. Today, Arcs...Read More

Star Fun

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