Learn about the differences between `Gas` and `Fees` in Ethereum and Cosmos. {synopsis}
## Introduction to `Gas` in the SDK
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## Matching EVM Gas consumption
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## Gas refunds
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## AnteHandler
The `AnteHandler` is a special `handler` that is run for every transaction during `CheckTx` and `DeliverTx`, before the `handler` of each `message` in the transaction. `AnteHandler`s have a different signature than `handler`s