Three Token-2022 Mints in One Week: Fees, Yield, and Soulbound

If you come from Web2, you probably think of a token as a number in a database that moves around when people transact. On Solana, the original SPL Token program is exactly that. Token-2022 is the upgrade — and it lets you bolt behaviors directly onto the mint itself, the way you would add middleware to a payment pipeline, except the middleware lives inside the asset and cannot be bypassed.

This week I shipped three different mints on Solana devnet, each

demonstrating a different Token-2022 extension. Here's what I built, the exact commands I ran, and when you'd actually reach for each one.

Mint 1: Transfer Fee (Days 50–51)

Mint address: ACvRnk4m9fDji76fq74n7Nzwo6tUcPyajmgi3jX9BY1Q