[TAS-174] Implement swap routes

[toniocodo]

Proposal to mimics a conventional AMM:

• we stick to the idea of tokenIn and tokenOut, the ‘You pay’ ⇒ ‘You receive’ model of uniswap. For this example I’ll take the default route: tokenIn: ETH ⇒ tokenOut: OETH
• when you click on a token select (i.e. tokenOut token), it opens the modal. The modals always shows all tokens available for the source (i.e. [OETH, ETH, MIX_TOKEN, WETH, stETH, rETH, frxETH, WOETH])
• the list displays the tokens using 3 different states:
  • disabled: the currently selected token (i.e. OETH) is not clickable because it’s already selected (duh)
  • available: the tokens that are available for the other token selected (i.e. empty list in this case, only available route with tokenIn: ETH is to tokenOut: OETH). When the list is empty, it means the route is not supported. If an amount was already there, it’s not reset because the route is supported and we can trigger estimation.
  • greyed out: these are the other tokenOut that don’t have available routes with the tokenIn (i.e. [ETH, MIX_TOKEN, WETH, stETH, rETH, frxETH, WOETH]). Clicking on one of those will update the opposite field and set the amounts to zero. We can either set the opposite token to be the first available one or to null

That allows us to avoid inconsistencies in the form and always have it settled on a route that exists. I’ll implement it to verify that it behaves properly.

Tasks

Beta Give feedback

1. Implement swap matrix
2. Add operations for each movement
3. Support for un/wrap OETH
4. Support for curve swap
5. Support for mint vault
6. Support for redeem vault
7. Support for zapper-eth
8. Support for zapper-sfrxEth
9. Support Mix Token (redeem proportional)