Upload files to xchainClient when user upload them on L1 (e.g. avalanche)

[longfeiWan9]

When the xchainClient client runs with buffer & aggregation service, it should store files until they are aggregated for deal-making. This works smoothly with xchainClient offer-file command for testing because it runs on the same machine and is not a real user behavior.

So we should

• figure out how user/dApp on other L1 sends files to xchainClient when it initializes the cross-chain storage request.
• document the process or tutorial
• adding this function into demo

[snissn]

1. Provide a way to directly upload to xchain daemon
2. Have user set up local ipfs go daemon and upload to their go daemon and then xchain can download through ipfs
3. third party pin platform
4. figure out how to get ipfs daemon to run "in browser" so 2) but the browser serves the file to xchain through ipfs (playing with this but stuck on it)

i would love 4) to work but like 2) as an option if i can't get it to work

[longfeiWan9]

I think 2) having users set up local ipfs and serving the data will be tough since they need to do extra setup and also ensure it is running to serve data.
I will vote for 3: maybe us running ipfs node as pinning platform for crosschain data bridge. But I am not sure how chain buffer works with remote ipfs node.