Every mechanica coin can carry.

A cut of every transfer is withheld inside the recipient account. Children inherit it at a fixed 2.5%.

detect / transferFeeConfig extension on the mint, basis points and max fee decoded

Collected tax is harvested and destroyed, so supply only goes down.

detect / harvestWithheldTokens and burn instructions found in replayed history

Collected tax is withdrawn to a single authority wallet.

detect / withdrawWithheldTokens instructions without a matching burn

Balances compound continuously and wallets display the grown amount. Read, not inherited: Meteora pools reject yield mints.

detect / interestBearingConfig extension, current rate in basis points

Fair launch where price follows a curve until the coin migrates to an AMM.

detect / pump.fun, Meteora or LaunchLab program calls in the transaction log

An external program runs on every transfer and can enforce any rule.

detect / transferHook extension, hook program inspected for upgrade authority

Tokens can never leave the wallet that received them.

detect / nonTransferable extension on the mint

The mint account can be closed once supply reaches zero.

detect / mintCloseAuthority extension with a live authority

Someone can still print unlimited new supply.

detect / mintAuthority field is not null

Someone can freeze any holder so they cannot sell.

detect / freezeAuthority field is not null

One wallet can move or burn tokens out of any holder's account.

detect / permanentDelegate extension with a delegate set

An authority can halt every transfer at once.

detect / pausableConfig extension on the mint

New buyers start frozen until approved. The classic honeypot.

detect / defaultAccountState extension set to frozen