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DEX · TOKEN EXTENSIONS

Solana Token Extensions: How to Read the Number Before a Swap

Solana's Token-2022 program adds extensions such as transfer fees, transfer hooks and permanent delegates. They change what happens when you swap.

By ChartsPod Editorial Team · Reviewed by ChartsPod Research
Published · Updated · 5 min read

Short answer

Token extensions add behaviour to Solana tokens: a transfer fee takes a share of every transfer; a transfer hook runs custom code on transfers (which can restrict them); a permanent delegate can move tokens from any account; a default account state can create frozen accounts. Before a swap, check which extensions a token uses and their settings. A swap quote may not show a transfer fee clearly, and a permanent delegate means holdings can be moved without your signature.

What the number means

ReadingInterpretation
Transfer feeCharged on each transfer
Transfer hookCustom logic; may block
Permanent delegateCan move tokens from any account
Default frozenNew accounts start frozen
Extensions to checkExtensions to check: Transfer fee — Rate and cap; Transfer hook — Program address; Permanent delegate — Holder; Default state — Frozen?; Others — Read the mint.Transfer feeRate and capTransfer hookProgram addressPermanent delegateHolderDefault stateFrozen?OthersRead the mint
Each changes swap behaviour. Original ChartsPod editorial graphic.

Compare Solana Token Extensions across Binance, Bybit, OKX and Hyperliquid markets.

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Checks before the swap

Token Extensions checksToken Extensions checks: Token program (legacy or 2022); Transfer fee settings; Hook program; Permanent delegate; Default account state.TOKEN EXTENSIONS CHECKSToken program (legacy or 2022)Transfer fee settingsHook programPermanent delegateDefault account state
Each takes under a minute. Original ChartsPod editorial graphic.

Example

Illustrative: a token with a 5% transfer fee loses 5% on the swap into your wallet and again when you send it to a pool to sell — about 9.75% round trip before pool fees.

Related: Solana Freeze Authority: How to Read the Number Before a Swap, DEX Honeypot Warning Signs: How to Read the Number Before a Swap.

Token extensions add behaviour to Solana tokens: a transfer fee takes a share of every transfer; a transfer hook runs custom code on transfers (which can restrict them); a permanent delegate can move tokens from any account; a default account state can create frozen accounts.

Check Solana Token Extensions against a live market before relying on it.

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Questions readers ask

What are Solana token extensions?

Token-2022 features adding behaviour to tokens.

Which are riskiest?

Permanent delegates, hooks and default frozen state.

Do quotes show transfer fees?

Not always clearly; check the mint.

Sources and methodology

DEX Screener behaviour comes from its official documentation; pool and token concepts from CoinGecko, Uniswap, Raydium and Solana documentation, as read on 17 October 2026. Examples use illustrative numbers and do not refer to any real token. Nothing here is a recommendation to trade any token.

  1. Solana: Token extensions — Token-2022 extensions such as transfer fees, transfer hooks, permanent delegate and default account state.
  2. Solana: Assets on Solana (tokens) — mint accounts, supply, decimals, mint and freeze authority.

This article explains research tools and workflows. It is not financial advice, does not recommend buying or selling any asset and does not predict prices. Crypto derivatives carry a risk of rapid and total loss of margin.

CHARTSPOD EDITORIAL EDITION · RESEARCH AND EDUCATION ONLY · NOT FINANCIAL ADVICE.