fix(tonco-dex): fix GraphQL bugs in pool stats and positions tools

[konard]

Summary

Fixes two critical GraphQL bugs reported in #141.

Bug 1: tonco_get_pool_stats — silent wrong-result when pool_address missing

Root cause: When pool_address was undefined/empty, normalizeToRaw() returned undefined. JSON serialization silently drops undefined fields, so { address: undefined } became {} — the indexer then returned all pools instead of the requested one. The first pool in the response was silently used.

Fix: Added explicit early-return validation before normalizeToRaw():

if (!params.pool_address) {
  return { success: false, error: "pool_address parameter is required" };
}

Bug 2: tonco_get_positions — GraphQL validation error on pool subfield

Root cause: The TONCO indexer's Position.pool field is a String! (raw pool address), not an embedded object type. The old query selected subfields on it:

pool {
  address version fee tick tickSpacing priceSqrt liquidity
  jetton0 { ... } jetton1 { ... }
}

This caused: "Field 'pool' must not have a selection since type 'String!' has no subfields."

Fix:

• Query pool as a bare scalar string (the pool address)
• Use Position's own jetton0/jetton1 fields (which ARE object types) for token info
• Add a separate pools query to fetch tick, version, fee, tickSpacing for in-range calculation
• Fix creationTime parsing: the indexer returns ISO date strings, not Unix timestamps

How to reproduce the issues

Bug 1:

await tonco_get_pool_stats.execute({}) // pool_address missing
// Before fix: silently returned stats for the first pool in the database
// After fix:  { success: false, error: "pool_address parameter is required" }

Bug 2:

await tonco_get_positions.execute({ owner_address: "EQ..." })
// Before fix: { success: false, error: "GraphQL error: Field 'pool' must not have a selection since type 'String!' has no subfields." }
// After fix:  { success: true, data: { positions: [...] } }

Tests

Regression tests added in plugins/tonco-dex/tests/index.test.js:

• Bug #141 fix: tonco_get_pool_stats validates pool_address — 3 tests
• Bug #141 fix: tonco_get_positions uses correct GraphQL schema — 3 tests

All 37 tests pass (node --test plugins/tonco-dex/tests/index.test.js).

Fixes #141

[konard]

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[konard]

✅ Ready to merge

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