Stale-approval exposure on deprecated router

Meteora's assessment for RD-F-168 — scored gray on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

Solana uses SPL token approval (token-authority-delegate) pattern rather than EVM unlimited approvals. Legacy Mercurial Multi-token Stable Pool (MERLuDFBMmsHnsBPZw2sDQZHvXFMwp8EdjudcU2HKky) is deprecated; stale SPL token delegations not assessed. The Solana approval model is per-transaction in most patterns, reducing persistent stale-approval surface vs EVM. No allowance scan performed.

Sources #

Internal
Meteora Protocol Profile — Legacy Programs.research/protocols/meteora/00-profile.md §3 — legacy Mercurial program MERLuDFBMmsHnsBPZw2sDQZHvXFMwp8EdjudcU2HKkyretrieved 2026-05-16

Methodology #

Count the number of active user approvals (ERC-20 `allowance`) to deprecated router or protocol contracts.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol meteora factor RD-F-168 score gray collected_at 2026-05-16 10:03:05