Why Do Token-2022 Extensions Have to Be Added at Mint Creation?

Short summary

Solana Token-2022 extensions must be configured at mint creation because Solana allocates fixed account storage upfront, unlike Web2 systems with flexible schemas that can evolve over time. Each extension stores its own configuration data on-chain, increasing storage needs that must be predetermined before the mint is created. This design reflects Solana's account model, where storage cannot grow dynamically after initialization.

• •Token-2022 extensions (transfer fees, metadata, etc.) store configuration data directly in the mint account
• •Solana accounts have fixed, pre-allocated storage that cannot expand dynamically
• •Developers must declare all needed extensions at creation; adding later would require account growth Solana doesn't support

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