[Feature Request]: allow external SP selection

[ze42]

What is the problem you're trying to solve?

Sending and spreading data dynamically to different available SP.

From what I’ve seen, singularity schedule deals are made to send a whole source to a single provider, with a scheduled timeframe.

We would like to be able to automatically send to multiple SP, so probably having some external tool do the SP selection.

This could also help pushing deals to multiple SP and have a max replication factor, and instead of having SP pull deals, push some deals to different SP until reaching the proper replication factor.

Describe the workaround you currently have

Current work around: scripting around send-manual rather than using schedule deals.

Describe the feature you'd like

Current ideas:

• a way to configure a schedule sending-deal, with target not being directly a SP, but an external script / plugin (and maybe some param that could help the script identify which targets to consider - like a SP pool name… anyway, just some param to pass along)
• When schedule is triggered, and want to send a deal:
  • call the registered plugin with:
    • info about the deal-proposal (CID, client, price, size, duration, verified, keep-unsealed, …)
    • a list of SP not to consider (Those we just tried and failed, and - optionaly - known as already having a pending proposal, or already storing the CID)
  • The script should returns a SP
  • If no SP returned, consider we have no current valid target, and wait for next iteration
  • If a SP is returned, the deal-proposal should be send immediately to that SP (if it fails, a new selection must be made before trying to send the deal again)

Additional context

CIDgravity wants to enable on-line deals at a high success rate, a way for clients to onboard data in real-time.