Deprecated contracts still holding value
QuickSwap's assessment for RD-F-166 — scored yellow on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.
Evidence summary #
The QuickSwap Lend / Market.xyz lending module was permanently closed in October 2022 following the oracle manipulation exploit. The module's contracts were deployed by Market.xyz (a third-party operator), not QuickSwap's own deployer — QuickSwap's action was to halt its interface and advise user withdrawal. Market.xyz contracts remain on-chain; residual balances and active user approvals cannot be confirmed as zero without direct contract reads (Polygonscan HTML 403). The old QUICK legacy token (0x831753DD7087CaC61aB5644b308642cc1c33Dc13) is a migrated but still-circulating token with an active swap contract — this is not a stuck-value deprecated surface in the F166 sense. Yellow: surface is closed and announced, reducing risk materially, but third-party contract state is not fully confirmed at zero; curator on-chain verification required.
Sources #
- URLPolygon-Based DeFi Platform QuickSwap Closes Lending Service Following ExploitCoinDesk reporting QuickSwap closes lending service — confirms permanent closure of Market.xyz-based lending surfaceretrieved 2026-05-16
- QuickSwap Token Swap Contract — PolygonscanToken Swap contract (0x333068D06563a8DfDBF330A0e04A9d128e98bf5a) on Polygonscan — active migration path for old-to-new QUICK, confirming old token is not a stuck-value surfaceretrieved 2026-05-16
Methodology #
Determine whether contracts marked deprecated by a protocol announcement still hold >$100K in assets.
See the full factor methodology and distribution across all protocols →