Question: about blockchains

[gzliudan]

Which blockchains are supported by SIWE now ? What are requirements for EVM compatible blockchains ? Does blockchain must support ERC-4361 ?

[MidnightLightning]

I'll give a non-authoritative answer as not a project maintainer, but I believe any chain that is "EVM-compatible-enough" to support message-signing in general can support an ERC4361-compatible sign-in. The "Sign in With Ethereum" concept (ERC4361) only requires off-chain interaction (namely message signing compatible with ERC191). So as long as a blockchain has asymmetric key encryption that can create a message signature, it could create a message structured in the ERC4361 format.

For this particular library's implementation of ERC4361, I don't believe it does any enforcing of what chain the user is "connected" to; it only takes the message and the signature data to parse and check the validity of.

[obstropolos]

All EVM-compatible blockchains are compatible with ERC-4361; the ChainID just changes in the case of the signing message.

Also thanks @MidnightLightning