Events

The pool emits fill events. The engine does not emit a fill event.

PAMMTrade — listen to this for direct swaps

Emitted by NativeRFQPool.

event PAMMTrade(
    address recipient,
    address sellerToken,
    address buyerToken,
    uint256 sellerTokenAmount,
    uint256 buyerTokenAmount,
    bytes16 quoteId,
    address signer
);

Field	Direct tradePAMM	RFQ path that used pAMM
quoteId	bytes16(0)	RFQ quote id
signer	Pair pammTrader	Pair pammTrader
buyerTokenAmount	Actual amount out	Actual amount out

Topic0:

PAMMTrade(address,address,address,uint256,uint256,bytes16,address)

0xd9a78419f4f94739684d4bed95a1eb594d0b5f14272ef96a546fff2cc7d0b65d

None of the fields are indexed — filter by pool address, then decode.

For native legs, sellerToken / buyerToken hold the wrapped token (WETH/WBNB), never address(0).

Direct pAMM does not emit RFQTrade. For a given trade, a pAMM fill and an RFQ fill are mutually exclusive.

PAMMFallback — RFQ path only

event PAMMFallback(bytes16 indexed quoteId, address indexed engine, bytes4 reason);

Emitted on the RFQ path when the pAMM engine attempt reverts. The trade is then settled as an RFQTrade. Direct tradePAMM swaps never emit it. Compute topic0 as the keccak256 of PAMMFallback(bytes16,address,bytes4).

Config events (ops / indexing)

event EngineUpdated(bytes32 indexed pairKey, address indexed engine, address indexed pammTrader);
event DirectSwapEnabledUpdated(bytes32 indexed pairKey, bool enabled);

DirectSwapEnabledUpdated is emitted only when the flag value changes, while EngineUpdated is always emitted. Cache the flag from DirectSwapEnabledUpdated, and re-read directSwapEnabled onchain whenever EngineUpdated fires.