Mint Authority, Freeze Authority & LP Burn: Solana Safety Checks Explained

By the MemeAssist Research Desk · Published 2026-08-02 · Updated 2026-08-02 · 8 min read

Before buying any Solana token, verify four contract-level facts: mint authority revoked (supply can't be inflated), freeze authority revoked (your tokens can't be locked), liquidity pool tokens burned or locked (the pool can't be drained), and no hostile Token-2022 extensions like transfer hooks (your sell can't be blocked). Each unchecked item is a specific, proven rug mechanism.

Why do these four Solana safety checks exist?

Every Solana token is an account governed by the SPL Token program (or its successor, Token-2022). The program gives token creators specific powers — and each power, left active, is a specific way to take your money. These checks aren't superstition; they map one-to-one onto rug mechanisms our desk sees rejected every day.

What is mint authority?

Mint authority is the on-chain right to create new tokens of a given mint. Per the SPL Token documentation, whoever holds it can increase supply at will. For a memecoin, an active mint authority means the deployer can print billions of new tokens and sell them into the pool — instant dilution, mathematically guaranteed.

What to verify: mint authority shows as revoked/null on Solscan or in any scanner. In our telemetry this was the third most common rejection reason — 179 tokens flagged in a single week. Legitimate memecoins revoke it at or shortly after launch; there is no innocent reason for a "community token" to keep it.

What is freeze authority?

Freeze authority lets its holder freeze any token account for that mint — after which the frozen wallet cannot transfer or sell. As a rug mechanism it's brutal in its simplicity: let people buy, freeze them, sell into the liquidity they can no longer touch.

What to verify: freeze authority revoked/null. Rare legitimate uses exist (regulated assets, sanctioned-wallet compliance for stablecoins), but for a memecoin an active freeze authority earned 45 rejections in our one-week telemetry and deserves every one of them.

What does "LP burned" mean?

When liquidity is added to an AMM pool, the provider receives LP tokens — a claim on the pool's contents. If the deployer keeps those LP tokens, they can withdraw both sides of the pool at any moment: the classic liquidity rug, and the reason "LP burned" became a meme-trading mantra.

Burning the LP tokens (sending them to an unspendable address) makes the liquidity permanent. Locking them in a time-lock contract is weaker but acceptable if the lock is long and verifiable. Our engine rejected 107 tokens in a week for pools with 0% LP burned or locked.

Pump.fun caveat: tokens that graduate from pump.fun get their LP burned automatically at graduation — that vector is closed. But supply-based rugs (concentrated insiders dumping) survive graduation just fine, which is why holder concentration stays the top flag even on graduates.

What are Token-2022 extensions and transfer hooks?

Token-2022 is Solana's extended token standard. Most extensions are legitimate (metadata, transfer fees for specific designs), but two are honeypot enablers:

Transfer hooks — developer-controlled code that runs on every transfer and can make sells fail. See Solana's own transfer hook guide for how much power the hook program has. You can buy; your sell reverts. 58 rejections in our telemetry.
Permanent delegate — an address that can move (or burn) tokens out of any holder's account, forever. For a memecoin this is confiscation-as-a-feature.

What to verify: the token uses classic SPL Token, or if Token-2022, has no transfer hook / permanent delegate / confiscation-grade extensions. Our real-money desk hard-rejects these before any other check runs.

The 4-line Solana token safety checklist

Mint authority: revoked.
Freeze authority: revoked.
LP tokens: burned (or verifiably long-locked).
Token-2022 extensions: none hostile (no transfer hook, no permanent delegate).

All four are visible on-chain in under a minute via Solscan, or in one shot in MemeAssist's free analyzer, which also layers on holder-concentration analysis and creator-wallet history — because passing the contract checks alone still left a 15% rug rate in our live 2026 cohort.

Frequently asked questions

How do I check if mint authority is revoked on Solana?

Open the token's mint address on Solscan — the overview shows Mint Authority and Freeze Authority fields; 'null' or 'revoked' is what you want. Free scanners like MemeAssist check both automatically.

Is a locked LP as safe as a burned LP?

Almost, if the lock is long-dated and on a reputable locker you can verify on-chain. Burned is strictly safer because it's irreversible. Short locks are a yellow flag — they may just be delaying the rug.

Are all Token-2022 tokens dangerous?

No — Token-2022 is a legitimate Solana standard and many extensions are harmless. The dangerous ones for memecoins are transfer hooks and permanent delegates, which can block sells or confiscate tokens. Check which extensions are enabled, not just the program name.

Can a token re-enable mint authority after revoking it?

No. On Solana, setting the mint authority to null is permanent — supply can never be inflated afterward. That's why 'mint revoked' is a meaningful, irreversible safety signal.

If all four checks pass, is the token safe to buy?

Safer, not safe. These checks close the contract-level rug vectors, but insiders holding concentrated supply can still dump. In our live July–August 2026 cohort, 15% of tokens that passed every automated check still rugged — sizing and exits matter as much as screening.