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I read https://github.com/hyperledger/indy-sdk/blob/master/docs/getting-started/indy-walkthrough.md and https://github.com/hyperledger/indy-node/blob/master/docs/source/auth_rules.md.

I think Trust Anchor , ENDORSER are have the same role, but I don't know the difference.

MiryangJung
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From an SDK point of view Trust Anchor equals Endorser, meaning that a Trust Anchor is fact an Endorser, but in a broader sense and looking up the Sovrin Dictionary a Trust Anchor is an entity like an a Credential Issuer (eg:Government,University,Company ecc..) that is an authoritative institution.

Source and Source page 64

Actually while trying to do some implementation with the Java Wrapper I've seen that in the method buildNymRequestuildNymRequest(String submitterDid,....,String role) if putting in the role="TRUST_ANCHOR" actually it will be translated to ENDORSER in the NYM transaction ( I check the transaction using indyscan https://github.com/Patrik-Stas/indyscan). You may also want to check out my implementation (work in progress) of some operations in Java. https://github.com/caltr98/IndyWorkings

If you've found a better solution on the Trust_Anchor/Endorser debacle please let me know.

Calogero Turco
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