W2: Indexer

[CLAM101]

Indexer — all on-chain event monitoring, publish to NATS.

Blocked by

• C1: Fork Polymarket contracts + deploy to Polygon mainnet contracts#1

[CLAM101]

Note from P2 (#7) planning (updated)

Indexer role: pure event pipeline

The Indexer watches on-chain events and publishes them to NATS. No DB writes, no business logic, no status transitions. Just chain → NATS.

Events the Indexer must publish (relevant to P2)

indexer.condition.prepared — when ConditionPreparation event is emitted on ConditionalTokens:

• Payload: condition ID, oracle address, outcome slot count, tx hash, block number

indexer.payout.reported — when PayoutRedemption event is emitted:

• Payload: condition ID, payout vector, tx hash, block number

Who acts on these events

The Platform Service subscribes to indexer.* subjects and handles all business logic:

• indexer.condition.prepared → match condition ID to Pending market → transition to Active
• indexer.payout.reported → read payout vector → resolve or void market, cancel open orders

See #34 (P2.4) for the full flow design.