A place for developers to talk about building on Farcaster.

/dev

How this works

- Standard App Store IAP APIs—including the 30% fee

- Warpcast app generates a transaction( since the user has their Farcaster mnemonic loaded)

- Once IAP is confirmed, we use a Warpcast backend service that has some ETH in wallet to pay for the txn

How this works

- Standard App Store IAP APIs—including the 30% fee

- Warpcast app generates a transaction( since the user has their Farcaster mnemonic loaded)

- Once IAP is confirmed, we use a Warpcast backend service that has some ETH in wallet to pay for the txn

https://warpcast.com/dwr.eth/0x247ccf

Is this 4337 (you're acting as bundler), or standard relay?

/bettik founder /outercorps stalwart | ex-binance, ex-celsiusX

EOA + basic Warpcast backend service with an Ethereum hot wallet in AWS (we top up the wallet occasionally)

Sounds like relayed metatransaction, so since the user isn't msg.sender, you're mostly limited to your own contracts or ERC-2771 compatible contracts?

point being - you aren't able to simply allow us to call Uniswap, etc?

Perhaps you can use the EOAs as owners on a 4337 wallet & WC sends signed UserOps to a bundler?

Yeah, our focus is making this work really well for Farcaster onchain actions for now

Yea, if the AWS wallet calls UniswapV2, for example, it would read the AWS wallet as msg.sender. You'd need to call a contract that uses some method to unwrap and verify the carried signed message to confirm intent from the message signer rather than the tx sender.

20. hacking @ https://www.spire.dev/ 
previously intern Nethermind, epns.io

Yea, if the AWS wallet calls UniswapV2, for example, it would read the AWS wallet as msg.sender. You'd need to call a contract that uses some method to unwrap and verify the carried signed message to confirm intent from the message signer rather than the tx sender.

https://www.alchemy.com/overviews/meta-transactions

hmm, they can call uniswap using the aws hot wallet, right? (or maybe, i don't get the question) 
i imagine the current model as a basic fiat to eth exchange lol