fix: handle direct aggregators in price oracle indexing

[grkhr]

Fix: Support Direct Chainlink Aggregators Without Proxy Wrapper

Problem

Multiple assets have priceInEth: "0" in the subgraph despite having valid on-chain oracle prices. This affects:

• All PT tokens (PT-sUSDE, PT-USDe, etc.)
• Major assets: WBTC, GHO, USDe, sUSDe, wstETH, cbETH, weETH, rETH, etc.

Root cause: Code assumes all price feeds use EACAggregatorProxy pattern (proxy → aggregator), but some assets use direct aggregator addresses without a proxy wrapper. When aggregator() call reverts, the handler exits early without saving priceSource.

Location: src/mapping/proxy-price-provider/v3.ts:148-160

Current Behavior

if (priceOracleAsset.type == PRICE_ORACLE_ASSET_TYPE_SIMPLE) {
  let chainlinkProxyInstance = EACAggregatorProxy.bind(assetOracleAddress);
  let aggregatorAddressCall = chainlinkProxyInstance.try_aggregator();

  if (aggregatorAddressCall.reverted) {
    log.error(...);
    return;  // ❌ Exits without saving priceSource
  }

  let aggregatorAddress = aggregatorAddressCall.value;
  priceOracleAsset.priceSource = aggregatorAddress;
}

Fix

Handle both patterns - proxy and direct aggregator:

if (priceOracleAsset.type == PRICE_ORACLE_ASSET_TYPE_SIMPLE) {
  let aggregatorAddress = assetOracleAddress;  // Default to direct address

  let chainlinkProxyInstance = EACAggregatorProxy.bind(assetOracleAddress);
  let aggregatorAddressCall = chainlinkProxyInstance.try_aggregator();

  // If it's a proxy, use underlying aggregator. Otherwise use direct address.
  if (!aggregatorAddressCall.reverted) {
    aggregatorAddress = aggregatorAddressCall.value;
  }

  priceOracleAsset.priceSource = aggregatorAddress;
  ChainlinkAggregatorContract.create(aggregatorAddress);
}

Evidence

On-chain data exists (Dune query):

SELECT asset, source FROM aave_v3_ethereum.AaveOracle_evt_AssetSourceUpdated
WHERE asset = 0x6c9f097e044506712b58EaC670c9a5fd4BCceF13  -- PT-sUSDE
-- Result: Events emitted at block 23290548

Subgraph shows missing prices:

{ reserves { symbol price { priceInEth } } }

{ "symbol": "PT-sUSDE-27MAR2025", "price": { "priceInEth": "0" } },
{ "symbol": "WBTC", "price": { "priceInEth": "0" } },
{ "symbol": "wstETH", "price": { "priceInEth": "0" } }
// ... 20+ more assets with priceInEth: "0"

Impact

• ✅ Backwards compatible with proxy-based feeds
• ✅ Adds support for direct aggregator pattern

Files Changed: src/mapping/proxy-price-provider/v3.ts (lines 148-165)