TokenContractInfoWasm missing toJSON() serialization - returns empty object

[thephez]

Description

getTokenContractInfo returns an empty object {} instead of the expected data like {"contractId": "...", "tokenContractPosition": 0}.

Root Cause

The TokenContractInfoWasm struct in packages/wasm-dpp2/src/tokens/contract_info.rs is missing serde serialization support.

Current code (broken):

#[wasm_bindgen(js_name = "TokenContractInfo")]
#[derive(Clone, Debug, PartialEq)]  // Missing Serialize, Deserialize
pub struct TokenContractInfoWasm(TokenContractInfo);
// Missing: impl_wasm_serde_conversions! macro

Compare to working types like TokenTotalSupplyWasm:

#[wasm_bindgen(js_name = "TokenTotalSupply")]
#[derive(Clone, Serialize, Deserialize)]  // Has serde derives
#[serde(rename_all = "camelCase")]
pub struct TokenTotalSupplyWasm { ... }

impl_wasm_serde_conversions!(TokenTotalSupplyWasm, TokenTotalSupply);  // Provides toJSON()

Why It Fails

1. JS code calls val.toJSON() on WASM objects for serialization
2. TokenContractInfoWasm has no toJSON() method (missing macro)
3. Falls back to Object.entries(val)
4. wasm_bindgen getters aren't enumerable properties → returns {}

Steps to Reproduce

1. Use evo-sdk-website with SDK v3.0.0
2. Select Queries > Token Queries > Get Token Contract Info
3. Enter a valid token contract ID (e.g., H7FRpZJqZK933r9CzZMsCuf1BM34NT5P2wSJyjDkprqy on testnet)
4. Execute - returns {} instead of contract info

Expected Behavior

Should return:

{
  "contractId": "EBioSoFFTDf346ndCMHGmYF8QzgwM8972jG5fL4ndBL7",
  "tokenContractPosition": 0
}

Suggested Fix

In packages/wasm-dpp2/src/tokens/contract_info.rs:

1. Add Serialize, Deserialize derives
2. Add #[serde(rename_all = "camelCase")]
3. Add impl_wasm_serde_conversions!(TokenContractInfoWasm, TokenContractInfo); macro

Or manually implement toJSON() method.

[thephez]

Additional WASM types with the same issue

While investigating getVotePollsByEndDate returning empty objects [{}, {}, {}], I found several more types missing toJSON() / impl_wasm_serde_conversions!:

File	Type	Query Affected
packages/wasm-sdk/src/queries/voting/polls.rs	VotePollsByEndDateEntryWasm	getVotePollsByEndDate()
packages/wasm-sdk/src/queries/voting/state.rs	ContestedResourceVoteStateWasm	getContestedResourceVoteState()
packages/wasm-sdk/src/queries/voting/state.rs	ContestedResourceContenderWasm	(nested in vote state)
packages/wasm-sdk/src/queries/voting/state.rs	ContestedResourceVoteWinnerWasm	(nested in vote state)
packages/wasm-sdk/src/queries/identity.rs	IdentityContractKeysWasm	getIdentitiesContractKeys()
packages/wasm-sdk/src/queries/group.rs	IdentityGroupInfoWasm	getIdentityGroups()
packages/wasm-sdk/src/queries/token.rs	RewardDistributionMomentWasm	getTokenPerpetualDistributionLastClaim()

Note: VotePollsByEndDateEntryWasm has Rc<Array> fields which may not work with the standard impl_wasm_serde_conversions! macro - it may need a manual toJSON() implementation similar to the suggestion for TokenContractInfoWasm.