Gasfree Tx support for MsgMicrotx submissions #56
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ChristianBorst
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The gasfree module has the aim of enabling gasfree transactions on Althea-L1. A gasfree transaction contains only messages that the gasfree module has stored in its GasFreeMessageTypes Param (set by governance). This initial implementation defines a wrapper AnteDecorator which allows certain transactions to bypass other AnteDecorators if a transaction can be executed gasfree. It is up to other AnteDecorators (or message handlers) to charge fees outside of the normal gas fee process. The first gasfree message type will be MsgMicrotx, enabling Althea's decentralized peer-to-peer payments without requiring a balance of the Althea token. It is expected that Microtxs will charge a percentage fee and ignore gas requirements in exchange. It is critically important to protect the mempool and block space by kicking out invalid gasfree transactions and charging alternative fees early in transaction processing, or else the chain is susceptible to DoS attacks via spam.
The first gasfree msg will be MsgMicrotx (set by default in module genesis) and so special fee charges have been added to the AnteHandler via the new ChargeGasfreeFeesDecorator. This works together with the SelectiveBypassDecorator to avoid charging MsgMicrotx submissions fees in the native token if the submitted Tx contains solely gasfree msgs (for now, only MsgMicrotxs). The microtx module was modified to avoid double-charging MsgMicrotx fees by first checking the gasfree's current params. If MsgMicrotx is ever removed from the gasfree module's GasFreeMessageTypes list then the microtx should go back to charging fees in the message handler as normal.
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ChristianBorst
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jkilpatr
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Mar 14, 2024
jkilpatr
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Mar 14, 2024
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