ERC: Tokenizing Withdrawal Claims for Async 4626 Vaults

[cosullivan]

I have done something similar but built ontop of ERC7540 where it exposes the illiquid async requests as ERC6909 tokens which can then be traded on marketplaces.

Making 7540 Fungible

Now that ERC7540 is increasing traction, its a good time for new primitives to be built on top. What I am looking to address is the ability to allow the 7540 async requests to become fungible and have outlined my implementation in the following spec. If there is anyone that is deep in the 4626/7540 trenches then it would be good to hear feedback. A big shoutout to @jeroen for his valuable feedback so far. ERC7540Fungibility TODO: think of a better name Overview ERC7540Fungibility converts pe…