send cross chain message from ink contract

[master-davidlee]

Can we send cross-chain message from ink contract?

[RoyTimes]

I'm no expert on this topic but you might wanna check out https://github.com/Ink-Bridge

[ascjones]

I'm assuming that the way to do this would be to provide a chain extension which would allow sending of cross chain messages. I've not looked into this too deeply yet, but that is the first avenue I would investigate.

[HCastano]

@master-davidlee Like Andrew said, your starting point should be chain extensions. What you do afterwards depends on the specific type of chain you want to connect to.

For example, if your chain is a part of the Polkadot ecosystem you should be able to hook into the XCM pallet. If it's not part of Polkadot but still built on Substrate you may use some of the code in parity-bridges-common, such as the messaging pallet.