- This needed to be in Curve so that the executor can also take care of transfers from the user into the tycho router, to avoid having transfer actions mixed between the router and executors
- For protocols like Balancer and Curve, which expect funds to be in the router at the time of swap, we must support also transferring funds from the user into the router. Doing this in the router would mean we are dealing with transfers in two different places: in the router main methods and in the executors. To avoid this, we are now performing transfers just in the executors, and two transfer types have been added to support transfers into the router.
TODO:
- Add this for Balancer and Curve (only added for USV4 atm).
- TODO consider renaming TRANSFER_FROM and TRANSFER_PERMIT2 to include "pool" in the name
This way we can define protocol and chain specific addresses in this file and use them in the Encoders
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ENG-4306 Took 1 hour 4 minutes
- The router address can be set when creating the SplitSwapStrategy, which now takes an Option<Bytes> as input during initialization (another breaking interface change)
- This change allows us to change our router address in the future with minimal effect on the users. Users should only pass the router address in the split swap initialization if they intend to use their own router for execution.
- This change also means that the router address does not need to be passed with the solution, even when using the executor strategy (which was pointless).
- I thought of having a router_address() method to set this in the encoder builder - but it seemed too messy, since we don't need the router address for execution for example. We would then potentially unnecessarily load and set the default router address when not needed. It is also not even used at the highest level EVMTychoEncoder, so it makes more sense for it to be directly associated with the swap strategy instead.
- Users will now not be able to encode for different routers without re-initializing the strategy. We assumed this use case to be very rare and not worth supporting.
- Move executor_addresses.json to a top level directory
- Delete executors.json
- Use the same file for both encoding and setting executors
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ENG-4260 Took 19 minutes
Took 11 seconds
This way we don't have issues with paths and trying to read files that are at other locations after compile time
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ENG-4088 Took 44 seconds
Took 52 seconds
- This way this chain object contains everything we need, we don't need to worry about doing any transformation or calling any supplementary functions inside any of the encoders
- Needed to move our new Chain object to a higher level since this is used in the higher-level encoder traits. This required some weird default values in the constants in order to avoid using alloy's hex literal. I could have instead opted to make Bytes parse a string I think, though this would mean possibly returning an error at the constants level, which is not nice either.
Question:
- Do we want the user to be in charge of passing the native and wrapped token every single time? This may be a bit annoying for the user. For now, I have defaulted to those in constants.rs, this would take 5 mins to remove though if you don't like it, and it would get rid of this complicated bytes initialization.
Validates:
- Proper sequence of input, output, and first/last swap tokens for wrap/unwrap cases
- All solutions contain at least one swap
- Only exact in solutions are inputted (since we don't yet support exact out)
