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Protocol details

Read the code.Then read it again.

LegacyStack is a Liquity-style CDP system: overcollateralized vaults mint OCT against ETH and WBTC, a Stability Pool absorbs liquidations, redemptions anchor the peg, and an inheritance module executes continuity plans on-chain. This page is the operator view — parameters, oracle topology, and security posture, exactly as enforced by the contracts.

How it works — plain versionEcosystem & grants
Architecture
CDP · Liquity-style
Oracle
Chainlink + fallback
Network
Sepolia testnet
Specification

Read the code.Then read it again.

We publish parameters, oracle topology, and operational defaults up front. No marketing-only numbers. Everything below is enforced by the contracts.

Min CR
150%
Liquidation CR
110%
Recovery CR
150% system
Gas comp
200 OCT
Borrow fee
0.5%–5% dynamic
Redemption fee
0.5%–5% dynamic
legacystack.spec.yamlverified
# Live protocol parameters protocol:  name:        "LegacyStack"  protocol_token: "OCT"  network:     "sepolia"  peg_target:  "1.00 USD" collateral:  - symbol: "ETH"    min_cr: 150    liq_cr: 110  - symbol: "WBTC"    min_cr: 150    liq_cr: 110 oracle:  primary:    "chainlink"  fallback:   "in-house aggregator"  staleness:  3600s  deviation:  5%  sequencer:  "l2-uptime checked" inheritance:  enabled:           true  inactivity_window: 365d  // configurable  heir_cap:          10  debt_reserve:      "per-user, isolated" monitoring:  liquidation_bot:  true  alerts:           ["defender", "tenderly"]  soak_test:        "sepolia · 7-day rolling"
Audit posture

Security isthe product.

A loop of test, audit, fix, re-run. Engineered for the failure modes that destroyed prior vault protocols — and instrumented so an operator can prove it on demand.

  1. 01

    Internal audit pass · complete

    Slither, full unit suite, and adversarial scenarios across borrowing, redemption, liquidation, and inheritance.

  2. 02

    Invariant & stateful fuzzing

    System-wide invariants — including OCT supply ≥ debt, accounting integrity, and inheritance reserves — proven across thousands of randomized actor sequences.

  3. 03

    Oracle hardening

    Chainlink primary with staleness, deviation, and sequencer-uptime checks. Fallback feed plus pause-on-stale gating before sensitive operations.

  4. 04

    Liquidation bot + alerting

    First-party keeper, OpenZeppelin Defender autotask template, and Tenderly alert rules included.

  5. 05

    Sepolia soak

    Continuous on-chain smoke and soak scripts validate every release before mainnet promotion.

On the build path

Next protocol phases, in order: minimum wstETH yield architecture (yield accounting, user/protocol split, routing of the protocol share into the OCT redemption buffer) ahead of public testnet; holder-gated redemptions with a fee-funded redemption buffer; and Legacy Mode — inheritance-only vaults with no OCT debt and no liquidation or redemption exposure. Each ships behind the same discipline: tests, soak, freeze, audit.