Transfer Fees, Metadata, and Soulbound Tokens: A Tour of Solana Token Extensions

Short summary

A developer documents building four Solana tokens in six days using Token-2022 extensions. Key learnings: metadata attaches directly to mints, transfer fees are enforced by protocol without middleware, and non-transferable tokens work as on-chain credentials. Essential reading for Solana developers and product teams designing token-based features.

• •Metadata can be stored directly on mint accounts using Token-2022 extensions
• •Transfer fees are protocol-enforced with automatic withholding logic
• •Non-transferable tokens enforce protocol-level rules; burnable but non-tradeable

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