euler-multichain

Euler multichain → Ponder → Portal

A compact multichain factory indexer: Euler V2 EVault deposits/withdraws/borrows/repays/ liquidations across Ethereum, Base, and Arbitrum in one Ponder app, with each chain's historical backfill routed through SQD Portal. One factory() per chain discovers the child EVaults; the five action events are indexed into immutable log tables.

Run it with zero config — no .env, no keys — and it finishes in about a minute:

npm install && npm run dev

Two keyless data planes per chain are wired by default: history from the free public Portal (portal.sqd.dev, dataset per chain) and the realtime tip + state reads from public archive RPCs ({eth,base,arbitrum}.drpc.org — archive, because reads happen at historical blocks). Both are shared and rate-limited under load — fine for this bounded demo.

By default the Ethereum leg reuses the verified live window (22,681,265 → 22,801,264) and inserts vault rows directly from ProxyCreated, so first-run output shows real vault discovery immediately. The Base and Arbitrum legs are wired identically and keep their existing short factory-deploy windows; in the measured default run they completed cleanly but produced 0 rows, so a later window probe should pick stronger non-mainnet demo ranges. For a longer backfill or production, set your own RPC per chain and widen the window:

# your own RPCs (recommended beyond the demo) + full history on every chain
PONDER_RPC_URL_1=<eth-rpc> PONDER_RPC_URL_8453=<base-rpc> \
PONDER_RPC_URL_42161=<arb-rpc> PONDER_FULL=1 npm run dev

PONDER_DEMO_SPAN (default 200000) sets the Base and Arbitrum demo windows; PONDER_FULL=1 backfills each chain's full recorded history instead. See .env.example.

Verified (fresh clone, zero env, July 9, 2026): SQD Portal completed all three default backfills in 55s. GraphQL returned 39 vaults and 887 action events, all on the Ethereum leg (504 deposits, 163 withdraws, 185 borrows, 35 repays, 0 liquidations); Base and Arbitrum returned 0 vaults and 0 events in their current short windows.

See the result

Paste this query into http://localhost:42069/graphql after npm run dev completes:

query MultichainCounts {
  vaults {
    totalCount
  }
  mainnetVaults: vaults(where: { chain: "mainnet" }) {
    totalCount
  }
  baseVaults: vaults(where: { chain: "base" }) {
    totalCount
  }
  arbitrumVaults: vaults(where: { chain: "arbitrum" }) {
    totalCount
  }
  vaultEvents {
    totalCount
  }
  mainnetEvents: vaultEvents(where: { chain: "mainnet" }) {
    totalCount
  }
  baseEvents: vaultEvents(where: { chain: "base" }) {
    totalCount
  }
  arbitrumEvents: vaultEvents(where: { chain: "arbitrum" }) {
    totalCount
  }
  deposits: vaultEvents(where: { type: "deposit" }) {
    totalCount
  }
  withdraws: vaultEvents(where: { type: "withdraw" }) {
    totalCount
  }
  borrows: vaultEvents(where: { type: "borrow" }) {
    totalCount
  }
  repays: vaultEvents(where: { type: "repay" }) {
    totalCount
  }
  liquidates: vaultEvents(where: { type: "liquidate" }) {
    totalCount
  }
}

The verified response returned 39 total vaults, 39 mainnet vaults, 0 Base vaults, 0 Arbitrum vaults, 887 total events, and the per-action counts above.