Note
Ethereum casino withdrawal records: reading the fee line on an explorer
A withdrawal in ether leaves a public record that anyone can read, and the fee on it is the one number in the whole exchange that is not up to the operator or to you. Learning to read it takes a minute.
What does a block explorer show for one transfer?
Paste the transfer identifier from the casino's history into an explorer. The page lists the sender, the receiver, the amount, and a group of fee fields: how many gas units the transfer used, the price per unit, and the resulting fee in ether. Newer pages split the price into the base fee and the tip, and show how much was burned.
How does that compare with the fee the casino charged?
Roughly, it is the cost the operator bore. Some operators pass it on at cost with a preview, as Rollbit describes, and some show a flat fee per network, as Cloudbet does. A flat fee and the explorer's figure will rarely match to the last digit, because the flat fee is set ahead of time and the real price moved after.
What to keep
The identifier, the amount, and a note of which network the withdrawal used. They are enough to answer almost any later question, and the explorer will still hold the record long after the casino's own history has scrolled away.
Fields worth knowing by name
Gas used is how many units the transfer consumed; for a plain send it is 21,000. Gas price is what each unit cost, in gwei. The fee is the product of the two, in ether. Explorers often add a burnt line, the part of the fee the protocol destroyed, and a tip line, the part that went to the validator. None of these depends on how much was moved.
When the numbers look odd
A used-gas figure above 21,000 means more than a plain send happened, such as a call to a contract, and that is not by itself a sign of a problem. A price far above the usual band means the transfer was sent in a busy minute. A transfer that shows as failed still shows a fee, because failed work is charged as well.
Quick answers
| Why does the explorer show a lower fee than the casino charged? | A flat fee is set ahead of time and the real price can fall afterwards. The two will rarely match exactly. |
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| Where do I find a transfer identifier? | In the casino's withdrawal history, and in the wallet's activity list for the receiving wallet. |
Carry on with
Gas and fees the full mechanism behind the numbers in this note
payments on mobile: two screens, one fee the next note in the set
Cloudbet the operator that prints a fee for each of four routes