Why a Failed Included Transaction Can Still Cost Gas
A transaction can fail to deliver its intended result after the network has performed execution work. That is different from an error in a quote form before a transaction exists. Identify the category before interpreting a charge.
Separate three kinds of failure
A rejected wallet prompt, a failed estimate and an included transaction are separate observations. Find the hash and receipt for the event you are investigating. Do not assume a website error proves network inclusion. Conversely, closing the website does not undo execution already recorded on the chain. The public RunixCoin form supplies estimates and leaves execution unavailable; its quote errors are not transaction receipts.
Understand what reverting changes
The EVM REVERT instruction rolls back execution state changes while preserving the cost of work already consumed. It does not necessarily consume every gas unit allowed. This explains why an unsuccessful contract operation can still have a network cost. Do not conclude that any fee proves tokens were successfully exchanged, or that a smaller-than-maximum charge proves execution succeeded. Read the receipt status for that result.
Inspect actual cost on the correct chain
Use the explorer’s transaction fee details and receipt, rather than the original estimated dollar amount. Base documentation distinguishes execution and L1 publication costs and documents applicable operator-fee calculation. A simple Ethereum execution-fee multiplication should not be presented as a guaranteed complete Base total. Note both the native-currency amount and observation context; a changing dollar conversion is not evidence that the native charge changed.
Investigate before increasing limits
Compare any failure explanation with the intended destination, amount, token permission and output conditions. Increasing gas or loosening protection does not establish that those fields are correct. A separate successful approval may still exist even when the exchange reverted; inspect it independently. Keep a factual record of the failed request and the prior permission rather than counting both as one result. This guide does not submit a retry, change a limit or promise that a later attempt will succeed.
References and verification
Reviewed . Product limits reflect inspected public interface code. These are educational checklists, not reports of tested mainnet transactions; browser behavior and execution were not verified.