Discuss: How should dGrants handle obtaining and utilizing sybil scores?

[phutchins]

The dGrants system needs to a way to obtain sybil scores (a score based on risk for a donor with the intent of verifying that they are a unique individual) and utilize them when calculating quadratic matching for Grant Round payouts.

Separately we are driving an initiative to standardize and decentralize sybil score aggregation and exposure.

Grants Round 11 Scope
Gitcoin Holdings currently is an aggregator of sybil risk indicators and captures that data in a closed database. An initiative exists to export the sybil score aggregated by Gitcoin as a DID (Decentralized ID). In the short term (by Grants Round 11) the best approach may be to utilize this DID which would be attached to a users ETH account which they used to make their donation. This would make it such that a user could make a donation then subsequently verify their identity through the Gitcoin trust bonus process as long as they did this prior to the payout calculation event.

I imagine the blob of data that we would consume from this DID could look something like the following:

• Confidence Factor: 0-100 (100 being ultimate confidence)
• Unique Identifier: Should be one per unique human
• Signature(s): Making it possible to verify validity of the DID and Sybil Score data
• Time validity: Period of time that the Confidence Factor is assumed good for

Lets discuss what this could look like and what we need in order a solution like this to work.