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DO NOT MERGE: Demo new approach to error handling in ibc receive #20
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ethanfrey
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Mar 22, 2023
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A few annotations to understand the approach
| /// we look for a the proper reflect contract to relay to and send the message | ||
| /// We cannot return any meaningful response value as we do not know the response value | ||
| /// of execution. We just return ok if we dispatched, error if we failed to dispatch | ||
| /// This is a demo of a new way to handle both error ack and abort in a CosmWasm contract |
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Start here reading the general flow we are modelling
| env: Env, | ||
| msg: IbcPacketReceiveMsg, | ||
| ) -> Result<IbcReceiveResponse, ContractError> { | ||
| // Any error in this initial checks should abort the whole IBC transaction |
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Do inline only actions that can abort the tx (don't capture in x/wasm)
| let sub = SubMsg::reply_always( | ||
| WasmMsg::Execute { | ||
| contract_addr: env.contract.address.into_string(), | ||
| msg: to_binary(&ExecuteMsg::ProcessIbc { |
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Call self to actually do the logic
| ContractError::OnlySelfCall | ||
| ); | ||
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| match packet { |
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These lines moved from old ibc_packet_receive
| } | ||
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| /// This takes the submessage and encodes the proper ack field | ||
| pub fn reply_process_ibc(_deps: DepsMut, reply: Reply) -> Result<Response, ContractError> { |
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And this is where we handle the self-dispatch, both error and success cases.
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This is not meant to merge, but as a demo for discussion on CosmWasm/wasmd#1220