Super Testnet on Nostr: I would have them both fund the multisig simultaneously in the same transaction. A ...
I would have them both fund the multisig simultaneously in the same transaction. A psbt would help with this. Alice and Bob both add a 10 btc input to the psbt and the psbt has one 20 btc output that goes into the multisig address. Then both review/cosign/broadcast it. That way neither party sends any money unless both do.