Farcaster Devs

Feedback regarding detection of mini-app hosts:

• Option 1 (well-known query parameter) would be the worst because it’s another identifier apps need to hardcode and will be easily spoofed (akin to browser extension wallets setting `isMetaMask` to true on their `window.ethereum` object). Just continue to let apps specify custom params for themselves in `<meta name="fc:frame">` if they really need it.

• Option 2 (message passing) is ideal but can be improved further – I recommend turning it into a two-way message system modeled after EIP-6963 to avoid race conditions. (Also while you’re at it, use EIP-6963 to announce Farcaster Wallet’s EIP-1193 object to the app for instant compatibility with existing wallet picker UIs.)

• Option 3 (`isInMiniApp()` SDK function) – this is fine assuming apps don’t already have the SDK code-split from their main client-side bundle, but maybe redundant to Option 2.

Another benefit of the wurplet adopting EIP-6963 – apps can just leverage all the standardized RPC methods apps normally expect from a traditional wallet, like checking whether a given chain is supported or not.

Another benefit of the wurplet adopting EIP-6963 – apps can just leverage all the standardized RPC methods apps normally expect from a traditional wallet, like checking whether a given chain is supported or not.

https://github.com/farcasterxyz/miniapps/discussions/240#discussioncomment-13108720

/frontend dev (HTML/CSS)・founder/decentralized data wrangler /blockhead・contributor /ethglobal /walletbeat・hackathon bounty hunter・music maker・dropout・nomad・25

Exposing a list of chain IDs in the SDK wouldn’t hurt, but this can quickly become stale if apps don’t bump their SDK package version in a timely manner.

Have Warpcast announce Farcaster Wallet’s EIP-1193 object to the app using EIP-6963, then support the RPC methods `wallet_addEthereumChain` (EIP-3085) and `wallet_switchEthereumChain` (EIP-3326).

This lets apps “request” a particular chain, which Farcaster Wallet can accordingly accept or reject on the spot.

Explore the EIPs / ERCs mentioned in this cast:

https://eip.tools/eip/6963
https://eip.tools/eip/3085
https://eip.tools/eip/3326