Add Alchemy V4 support (native signer)

[RAIReth]

Initial investigation seems straightforward to setup on frontend with Alchemy dashboard.

Github login flow is supported.

No modal is provided. Select single login method and connect to our own UI.

Login is same process as Web3Auth but with Alchemy signer instead.

Will update new auth params if needed but likely is not and SDK can remain the same

https://github.com/rairprotocol/rair-sdk/blob/main/src/API/auth.ts#L1

[RAIReth]

Update from Killiane at Alchemy!

Hey @garretteth! Thanks for your patience while we were investigating with our Account Abstraction team!

Here are a few points to consider as we dig further:

• Ensure that signer.preparePopupOauth is awaited correctly. If it isn’t, the orgId might not be retrieved as expected.
• Check if enablePopupOauth is set to true in the config and call preparePopupOauth.
• We would like to clarify if this error is coming from the signer.preparePopupOauth call or elsewhere, such as during authenticate. This detail would help us pinpoint the root cause!

May we ask you to confirm these details or provide additional context regarding where the error is being triggered? This will help us to pinpoint the origin of the error! 🙏

Thanks in advance!