Summary
Security review of Accountable's collateral-backed fixed-term lending strategy, an extension to their Credit Vaults infrastructure featuring ERC-7540 async vault positions with no-liquidation, no-margin-call fixed-term loans.
Audited Functionality
The reviewed codebase implements Accountable's Vault-as-a-Service credit vault infrastructure, specifically the collateral-backed fixed-term strategy (AccountableCollateralFixedTerm). The product allows users to deposit any collateral into an ERC-7540 async vault, borrow USDC against them at a fixed loan-to-value ratio, and reclaim their collateral after repayment at maturity. The system enforces a no-liquidation, no-margin-call model with predictable fixed-term durations.
The vault lifecycle progresses through distinct phases: deposit collection during a bounded window, loan acceptance by the investment manager, USDC funding into a LoanEscrow module where depositors claim their pro-rata borrowing entitlement via a Synthetix-style per-share accumulator, loan servicing with interval-based interest accrual, borrower repayment, and finally depositor redemption through the ERC-7540 async redeem mechanism.
Findings Breakdown
About Accountable
www.accountable.capitalAccountable Capital is an on-chain capital management and financial verification platform designed to enable institutions to prove assets and liabilities in real time while preserving confidentiality. The platform combines privacy-preserving cryptography with decentralized infrastructure to support transparent capital allocation, structured lending, and verifiable yield generation. Accountable provides mechanisms for proof of solvency, going beyond traditional proof-of-reserves models by verifying both assets and liabilities, and offers modular infrastructure for building on-chain financial products such as structured credit and undercollateralized lending. Through its yield marketplace, the platform connects institutions, trading desks, and borrowers with verifiable yield opportunities backed by live cryptographic attestations.
