Chain ID to subscribe to (e.g., 1 for Ethereum, 42161 for Arbitrum)

Contract address to filter events from. If omitted, events from all contracts on the chain are matched.

Event ABI in Etherscan/Solidity JSON format. Must include 'name', 'type', and 'inputs' fields.

Filter DSL to match event parameters. Top level MUST be $and or $or. Supports $eq, $ne, $gt, $gte, $lt, $lte, $in, $nin operators.

Timestamp when the event was detected (UTC, RFC3339 format)

Decoded event parameters based on eventAbi. Field names and structure match the ABI definition.

Raw log data including address, topics, data, blockNumber, transactionHash, etc.