What is dust?
Dust is the fractional PEG that didn't make a complete glyph. It is the change left over when a buy doesn't land on a clean integer boundary.
If you buy 2.7 PEG, you get 2 glyphs (= 2.0 PEG) and 0.7 PEG of dust in your wallet. The 0.7 has ETH value, but it cannot become a third glyph on its own. Dust is liquid, sellable, and transferable like any other ERC-20 balance.
1 token = 1 peg. Fractional PEG sits as dust in your wallet — it cannot be combined later, but it retains its ETH value.
Why dust exists
Glyphs are whole units. The protocol enforces a strict 1 token = 1 peg boundary, there is no such thing as a 0.7 glyph. When a swap produces a non-integer PEG amount, the integer part mints glyphs and the remainder becomes dust.
This isn't a bug or a rounding error. It's the mechanism that gives each glyph its whole-unit identity and clear scarcity model. Without the dust rule, you could mint arbitrary fractional glyphs, breaking the rarity score and the visual identity guarantee.
Can I lose dust?
No. Dust is permanent ETH-denominated value in your wallet. It stays in your balance forever, there is no expiry, no sweep, no slashing. It is not at risk from slippage, fees, or any protocol action.
Dust bought directly from peg.fun accumulates across multiple buys, even days apart. If your peg.fun-bought dust eventually crosses the next 1.0 PEG boundary, the buy that pushes you over mints one additional glyph automatically.
This only applies to dust you bought through peg.fun's own swap. Dust that arrives any other way — a gift, a wallet-to-wallet transfer, an OTC deal, or a purchase on a different exchange — never counts toward that boundary, no matter how much of it you hold or how you combine it with peg.fun-bought dust. It's still yours, it still has full ETH value, and you can still sell it — it just never turns into a glyph on its own. Only purchases made through peg.fun's buy form build toward your next glyph.
What you'll see in the buy preview
When you enter an ETH amount in the buy form, peg.fun shows:
You will receive N glyphs + X.XXXX dust
This appears before you sign, so you can adjust the amount up or down if you care about minimizing dust. A common pattern: round your ETH input up slightly so you end the buy on a clean integer PEG balance.
Dust on the sell side
You can sell any amount, including pure dust. Selling exactly 1.0 PEG burns one glyph and converts the corresponding amount back to ETH. Selling 0.7 PEG (only dust, no full glyph) just converts the fractional balance back to ETH, no glyph burns.
If you sell 1.3 PEG, one glyph burns (corresponding to the integer 1.0) and 0.3 PEG of fractional value also converts to ETH.
Why this matters for rarity
The 1 token = 1 peg rule is the foundation of peg.fun's rarity model. Each glyph has a deterministic seed and a slot configuration that produces unique art. If fractional glyphs existed, the rarity score would dilute across infinite states and the "every unit has visual identity" promise would break.
Dust preserves the model: you can hold arbitrary fractional ETH-denominated value in PEG, but every glyph is a clean integer unit with its own identity.