Summary

Discovery of networks
- Given a DID, how to find it's network via gossiped ledger data
Versioning

Recording from the call: 20201124 Indy DID Method Specification Call Recording

	Hyperledger is committed to creating a safe and welcoming community for all. For more information please visit the Hyperledger Code of Conduct.

The specific will be specific that all DIDs MUST be self-certifying – e.g. derived from the initial public key used in the NYM
We'll use ":" for subsidiary ledgers, and we'll include placeholder support for KERI, leading to 4 cases:
- Ledger with no subsidiary name, example: did:indy:sovrin:12345
- KERI identifier on a ledger with no subsidiary name, example: did:indy:sovrin:keri:12345
- Ledger with subsidiary name, example: did:indy:sovrin:staging:keri:12345
- KERI identifier on a ledger with a subsidiary name, example: did:indy:sovrin:staging:keri:12345
To find networks we will require at least the first and perhaps the second of these approaches, while the rest are suggested:
- Config files for one or more known networks
- A mechanism for a ledger operator to register discovery information for other ledgers (aka "human gossip")
- Decentralized registries based on verifiable credentials
- Other registry mechanisms, such as the DDNR proposal

Discussion led by Daniel Hardman about how to implement the gossiping mechanism via "networks" ledger DIDs -
- Daniel Hardman presentation
- DID Namespace DID: https://github.com/WebOfTrustInfo/rwot8-barcelona/blob/master/topics-and-advance-readings/did-namespace-records.md
How to find config files in a centralized place?
- ToIP, DIF, OrgBook for networks
- Folder where the spec is – indy-did-method repo
How to find previous versions of DIDs and what are the implementation ramifications of that?
- <did>?version-id=<txnid>
  - Return the txnid as part of DID resolution so it can be included in URIs
- <did>?version-time=<timestamp>
  - Indy does do timestamping - coarse:
    - tracked as part of consensus to (a) within 5 minutes (b) batch time greater than the last one
    - leader node picks, but vetted by other nodes, understanding that the leader node's time could drift.
  - How to do time based querying?
    - Probably not indexed
    - Could do binary search querying of the txnids
  - Code needs to be written to do this.