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add readme for m2 #124

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Mar 28, 2023
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add readme for m2 #124

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4 changes: 3 additions & 1 deletion README.md
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Expand Up @@ -45,9 +45,11 @@ We modified `MempoolFeeDecorator` so that it can handle ibc-osmosis as fee. If t
We have an account to manage the ibc-osmosis user used to pay for tx fee. The collected osmosis fee is sent to that account instead of community pool account.

#### Swap accumulated ibc-tokens fee

##### Swap with Osmosis's tokens
We use osmosis's ibc hook feature to do this. We basically ibc transfer to the osmosis crosschain swap contract with custom memo to swap the osmosis fee back to customer chain's native-token and ibc transfer back to the customer chain.

##### Swap with others ibc-tokens
We use [``packet-forward-middleware``](https://github.com/strangelove-ventures/packet-forward-middleware) to do this. The ibc-tokens will be transferred to the host chain with the specific MEMO to forwarding transfer to osmosis crosschain swap contract. After that, Osmosis chain will swap to customer chain's native-token and ibc transfer back to the customer chain.

## Resources
- Main repo: https://github.com/notional-labs/fee-abstraction
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