Get Primary Username with proof returns empty object

[thephez]

The Get Primary Username query returns an empty object when proofs are requested. It works fine for the same identity when proofs are disabled. Example identity: 5RG84o6KsTaZudDqS8ytbaRB8QP4YYQ2uwzb6Hj8cfjX

[thephez]

I don't know if this analysis is accurate, but I'll include it for reference:

The problem is in the wasm-sdk's getDpnsUsernameWithProofInfo function. When extracting a single username from the array returned by getDpnsUsernamesWithProofInfo, the code incorrectly manipulates the JSON structure, causing the username string to be improperly serialized as an empty object.

│ │ In platform/packages/wasm-sdk/src/queries/document.rs (lines 784-818), the get_dpns_username_with_proof_info function: │ │
│ │ 1. Calls get_dpns_usernames_with_proof_info which returns: { data: ["username.dash"], metadata: {...}, proof: {...} } │ │
│ │ 2. Tries to extract the first username and directly assigns it to the data field │ │
│ │ 3. The issue is at line 803 where modified_result["data"] = first_username.clone() assigns a JSON string value │ │
│ │ directly to the data field │ │
│ │ 4. This causes serialization issues resulting in an empty object {} instead of the username string