DeFiPunk'd

Mainstreet

Yield

TVL
Type Yield
Chains
View on DeFiLlama ↗
Control criteria
Upgradeability Upgradeable Bug bounty Governance forum Docs mainstreet-finance.gitbook.io
About

Mainstreet Finance (Main Street) is a yield-bearing stablecoin protocol on Ethereum that issues msUSD, a synthetic dollar backed 1:1 by USDC, allowing users to hold a stable asset or stake it to receive msY tokens that accrue yield. Yield is generated by deploying capital into delta-neutral options box spread strategies on traditional finance venues such as the CME, targeting institutional-grade returns without directional market exposure. Users must complete KYC to mint or redeem msUSD directly with USDC, though msUSD can be acquired on secondary markets. The protocol uses a multi-token system to segregate risk: msUSD holders bear minimal risk while msY holders absorb yield variability from the options strategy.

Risk analysis

One card per dimension, sorted by severity. Only Verifiability and Autonomy carry automated signals in Phase 0. See methodology for scope.

Audit a dimension yourself · DEFI@home Contribute an LLM-run assessment — any model, any dimension. Three agreeing runs merge automatically into the public record.

DEFI@home is a distributed audit network modeled on SETI@home: instead of CPU cycles, it crowdsources LLM reasoning. Paste a slice prompt into Claude, ChatGPT, Gemini, or any browsing-capable model, and submit the JSON output as a pull request. The quorum bot merges it once ≥3 independent runs (from different models) reach the same grade — no single model, and no single contributor, can move the needle alone. How it works →

  • Address discovery 21 addresses on file · 1 run Submit run ↗
  • Verifiability Unverified Submit run ↗
  • Control Unverified Submit run ↗
  • Ability to exit Unverified Submit run ↗
  • Autonomy Unverified Submit run ↗
  • Open Access Unverified Submit run ↗
  • Audit all 5 dimensions · one prompt Submit run ↗
  1. Verifiability tentative
    No public repo or audits

    Neither a GitHub repository nor any audit is recorded. At Phase 0 this is the most conservative verifiability signal DeFiPunk'd can assign.

    Run your own prompt Submit run ↗
4 dimensions not yet assessed (Control, Ability to exit, Autonomy, Open Access)
  1. Control unknown Unverified
    Not yet assessed

    Who holds admin privileges, how contracts can be upgraded, and how quickly. No automated heuristic grades this at Phase 0; a real assessment arrives when onchain discovery reads roles, owners, and timelocks.

    No model has graded this dimension yet. Run the slice prompt through any LLM and submit the JSON — once ≥3 independent runs agree, the quorum bot merges the verdict here.

    Submit run ↗
  2. Ability to exit unknown Unverified
    Not yet assessed

    Whether users can exit on their own terms if the team disappears or acts adversarially. Requires per-protocol review; not available at Phase 0.

    No model has graded this dimension yet. Run the slice prompt through any LLM and submit the JSON — once ≥3 independent runs agree, the quorum bot merges the verdict here.

    Submit run ↗
  3. Autonomy unknown Unverified
    No Phase-0 autonomy signal

    Neither the category heuristic nor the forkedFrom signal fires for this protocol. A real autonomy graph (oracles, bridges, fallbacks, governance-mutable dependencies) arrives with Phase-2 onchain discovery.

    No model has graded this dimension yet. Run the slice prompt through any LLM and submit the JSON — once ≥3 independent runs agree, the quorum bot merges the verdict here.

    Submit run ↗
  4. Open Access unknown Unverified
    Not yet assessed

    Whether the protocol depends on privileged operators, whitelists, geo-restrictions, or off-chain infrastructure. This is not a signal DeFiLlama carries in a usable form; crawler-based detection lands in a later phase.

    No model has graded this dimension yet. Run the slice prompt through any LLM and submit the JSON — once ≥3 independent runs agree, the quorum bot merges the verdict here.

    Submit run ↗

Stage

Preview of the Phase-3 maturity framework. DeFiPunk'd will adopt DeFiScan v2's stages verbatim; the section is rendered below in its intended shape so the structure is visible today.

Mainstreet has not yet been assessed under the DeFiScan v2 stage framework.
The walkaway test is the central criterion. Once stages land, protocols reach Stage 1 only if users can exit in the presence of malicious operators even when the emergency council disappears.
Scope of assessment
Stages are assessed per-protocol against DeFiScan v2's criteria: governance structure, upgradeability path, timelock durations, emergency-council scope, and the walkaway test. The analysis depends on onchain discovery (roles, owners, timelocks) and deeper review of deployed contracts — neither of which DeFiPunk'd automates at Phase 0.
Stage 0 requirements pending
Governance is largely off-chain, contracts are upgradeable with short or no timelock, and the protocol depends on a multisig or team with full discretion. At Phase 0 DeFiPunk'd does not automatically evaluate these; the assessment lands with crawler-based onchain discovery.
Stage 1 requirements pending
Users can exit or opt out on their own terms even if the team disappears. Upgrades run through a meaningful timelock with an emergency security council clearly scoped. The walkaway test is the headline criterion.
Stage 2 requirements pending
Protocol is fully permissionless and immutable, or upgrades require a supermajority of token holders with a long timelock and no emergency override. This is the terminal stage of the DeFiScan v2 framework.
Learn more about DeFiScan v2 stages →
Stages are an opinionated assessment of maturity, not a rating of security or safety. A protocol can sit at Stage 2 and still carry substantial technical or economic risk; the framework exists to incentivize decentralization, not to rank protocols.

Contract surface

Every contract in scope for this protocol — pooled from DeFiLlama's TVL adapter (mechanical) and DEFI@home discovery submissions (LLM-curated). Verified-source flags come from Etherscan + Sourcify; owner / multisig metadata is read on-chain when available. Reviewer audit context, not a slice score. A lending protocol's adapter set will list third-party collateral tokens alongside its own contracts; attribution is the grader's job.

  • 21addresses
  • 1verified source
  • 1proxies

TVL adapter pinned at 683d369. Sourcecode fetched 2026-05-06. Control fetched 2026-05-07.

ethereumERC1967Proxy0x4ba0…7c00TVL + discproxytoken
Ethereumadmin (Custodian Manager legacy contract)0x57a4…a7e0discovery
Ethereumadmin (CustodianManager — manages custodian allowances)0x4cc9…5d0adiscovery
Ethereumadmin (Whitelist Manager legacy contract)0x55cd…1238discovery
EthereumEtherscan confirms msY token at 0x890A5122Aa1dA30fEC4286DE7904Ff808F0bd74A with name-tag 'Mainstreet: msY Token'; EIP-1967 proxy; implementation at 0x843e3a09675e5fa00951c55727f8b0f2076c0d2c; contract creator is 0xe0f9d2797082797bb7361c6e26b42d68c9da5c56 labeled 'Mainstreet: Deployer'; source includes UpgraderTimelockUpgradeable.sol; proxy upgraded 4 times since Dec 2025; no audit submitted on Etherscan.0x890a…d74adiscoveryfactory
Ethereummultisig (Custody multisig)0x6580…ccc4discoverymultisig
Ethereummultisig (DAO Multisig — governance)0x0eae…1858discoverymultisig
Ethereummultisig (unnamed — listed under Multisig Wallets in docs)0x861a…63e4discoverymultisig
Ethereumoracle (USDC oracle)0x098e…d2afdiscoveryoracle
Ethereumother (Mainstreet Deployer EOA)0xe0f9…5c56discoveryfactory
Ethereumother (Mint and Redeem legacy contract)0xb1e4…f54ddiscovery
Ethereumother (Minter — mint and redeem msUSD)0x70c0…de14discovery
Ethereumother (msUSD implementation msUSDV2)0x9627…da46discovery
Ethereumother (msY implementation StakedmsUSD)0x843e…0d2cdiscovery
Ethereumother (msYBridger — cross-chain bridge for msY via LayerZero)0x22eb…98f2discoverybridge
Ethereumtoken (msUSDV2 legacy token contract)0xe5fb…121ddiscoverytoken
Ethereumtoken (smsUSD legacy staked msUSD contract)0xc799…6c29discoverytoken
Ethereumtreasury (Insurance Fund)0xb72d…7f98discoverytreasury
Ethereumvault (FeeSilo — fee accumulation)0x6665…8b81discoveryvault
Ethereumvault (msUSDSilo — holds msUSD collateral)0x6f18…6871discoveryvault
Ethereumvault (msUSDSilo legacy token contract)0xecc7…ff6cdiscoverytoken

Protocol Info

Links

[defillama] Source: DeFiLlama [:] Source: DEFI@home quorum

Security

[defillama] Source: DeFiLlama
Audits
unknown
Bug bounty
unknown
Security contact
unknown

Technical

[:] Source: DEFI@home quorum
Upgradeability
Upgradeable

Provenance

[defillama] Source: DeFiLlama
Review status
listed
Updated
2026-07-13 09:20 UTC