tại sao Phí lưu trữ không hoàn lại không phải là 1% của Hoàn tiền lưu trữ

Question

Tôi chỉ tự hỏi tại sao Phí lưu trữ không hoàn lại không phải là 1% của Hoàn tiền lưu trữ: │ Gas Info │ │ ├────────────────────────────┼──────────┤ │ Computation Cost │ 1000000 │ │ Storage Cost │ 11187200 │ │ Storage Rebate │ 13031568 │ │ Non-Refundable Storage Fee │ 131632 │ │ Gas Used │ 947 │ │ Gas Budget │ 3089992 │ │ Gas Price │ 1000 │ │ Reference Gas Price │ 1000 │ │ Storage Gas Price │ 76 │ │ Rebate Rate │ 9900 │ ╰────────────────────────────┴──────────╯ `

Redterror · Answer

The non-refundable storage fee in your Sui transaction isnt exactly 1% of the storage rebate because its actually taken as 1% of the full original storage cost from when the data was first added, not just the refunded part you get back. When you remove or update stored items, Sui gives you back 99% of that initial cost as the rebate, keeping the other 1% to help with the networks long-term upkeep. In your case, adding up the rebate of 13,031,568 and the fee of 131,632 gives the original storage value of 13,163,200, and 1% of that matches your fee spot on, while calculating 1% off the rebate alone would give about 130,316, which doesnt line up. The rebate rate of 9,900 out of 10,000 backs this up, showing its set at 99% return. This system motivates folks to clear out old data while ensuring the network has funds for ongoing costs.

Benjamin XDV · Answer

The Non-Refundable Storage Fee is not strictly 1% of the Storage Rebate because it is calculated based on the net storage cost after applying the rebate rate (e.g., 99% refundable, 1% non-refundable) to the original storage cost, not the rebate amount itself. In your example, the rebate rate is 9900 (99%), meaning 1% of the initial storage cost is withheld as a fee—not 1% of the rebate. The formula is: Non-Refundable Fee = Storage Cost × (1 - Rebate Rate / 10000). Here, 11187200 × (1 - 9900/10000) = 11187200 × 0.01 = 111872 (close to 131632, with minor rounding or tier adjustments). Sui’s gas model prioritizes predictability, so fees scale with resource usage, not the rebate.

Evgeniy CRYPTOCOIN · Answer

The Non-Refundable Storage Fee is 1% of the Storage Cost (not the Rebate). In your example: Storage Cost: 11,187,200 1% Fee: ~111,872 (close to your 131,632, likely due to rounding or gas price adjustments) Why? Sui charges a small fee to prevent spam—it’s deducted from the rebate you’d otherwise get. Formula: Non-Refundable Fee ≈ (Storage Cost * 1%) (It incentivizes efficient storage cleanup.)

Arnold · Answer

Thats a sharp observation. The math doesnt seem to line up, and its not just you—its a bit confusing. The non-refundable storage fee isnt a simple 1% of the rebate. Its actually 1% of the total storage cost before the rebate is applied. So in your case, its 1% of that 11,187,200 figure. Let me do that quick math: 1% of 11,187,200 is 111,872. But your fee is 131,632, which is higher. Thats where the Rebate Rate of 9900 (or 99%) comes in. The system keeps 1% of the storage cost as a fee, but the calculation gets adjusted by this rebate rate. Honestly, the exact formula is more complex under the hood. The key takeaway is that its a small fee on the storage you use, not a direct cut of your rebate. The numbers can look off at first glance. I had to dig through the docs to get this myself.

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