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Sprinter Stash

Central to both Sprinter Stash is the Sprinter Liquidity Hub and Stash Pools—the smart contracts that manages and distributes liquidity.

Liquidity Hub​

Contract Address (Base): 0xa593A9bBBc65be342FF610a01e96da2EB8539FF2

Responsibilities:​

  • Depositing Liquidity: LPs deposit USDC → receive spUSDC-LP tokens.
  • Allocation: Hub allocates liquidity across supported chains based on solver demand.
  • Yield: Idle liquidity is deployed into lending protocols like Aave.
  • Withdrawals: LPs redeem their LP tokens for USDC when available.

Liquidity Pools​

Deployed across multiple chains, these on-chain vaults serve solver requests.

Key Pools​

  • Aave USDC Pool (Base, OP, Arbitrum):
    0x7C255279c098fdF6c3116D2BecD9978002c09f4b

  • Standard USDC Pool (Base, OP, Arbitrum):
    0xB58Bb9643884abbbad64FA7eBc874c5481E5c032

Functionality​

  • Crosschain Execution: Pools enable real-time execution of swaps and bridges.
  • Collateral-Free Borrowing: Solvers access liquidity backed by hub-signed approvals.
  • Rebalancing: Liquidity is auto-optimized across chains.
  • Risk Management: Protocol maintains loan-to-value ratios to ensure solvency.

Liquidity Authorization via MPC​

Sprinter Stash relies on a secure Multi-Party Computation (MPC) network to authorize the release of credit and liquidity during cross-chain operations.

What the MPC Does​

  • Signs liquidity quotes: When a solver calls the Stash API and is approved for a fill, the MPC co-signs the authorization.
  • Authorizes cross-chain releases: The MPC signs messages that unlock liquidity from remote vaults (e.g., on Base, Arbitrum).
  • Enforces protocol limits: MPC logic verifies borrowing caps, rate limits, and repayment preconditions before authorizing transactions.

Why MPC Matters​

  • Trust-Minimized Security: No single signer can approve a transfer — it requires a quorum (e.g. 3-of-5 or 4-of-7 threshold).
  • Decentralized Control: The MPC signer set is governed on-chain and can evolve over time as governance decentralizes.
  • Programmable Logic: Validators inside the MPC check for vault solvency, repayment windows, and risk heuristics before signing.

Governance & Oversight​

The Super Admin Multisig manages:

  • Rotation or upgrade of MPC key shares
  • Approval and removal of validator nodes
  • Emergency pauses or overrides to protect protocol funds

The Operations Multisig may interact with MPC flows for day-to-day liquidity tuning, such as temporarily adjusting caps or triggering manual resets if required.

Note: MPC signing happens off-chain but is fully verifiable and auditable via Sprinter’s on-chain replay logs and relay receipts.