What Token Extensions Are and Why a Web2 Developer Should Care

Short summary

Solana Token Extensions let Web2 developers configure token capabilities (transfer fees, interest rates, metadata, access control) at creation time without building smart contracts. The approach mirrors Stripe's feature configuration—you enable extensions via CLI flags at mint creation, and the runtime enforces them automatically. Trade-off: each extension adds on-chain storage cost, so choose features deliberately.

• •Token Extensions eliminate the need for smart contracts by embedding features in the protocol
• •Solana runtime automatically enforces extensions like transfer fees, interest rates, and access control
• •Each extension adds on-chain storage rent cost; optimize for what you actually need

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