V2: Native token fees paid by users for cross-chain messaging, summed from ExecutorFeePaid and DVNFeePaid events on SendUln302 (V2 default) and SendUln301 (V1-compat through V2 endpoints) across supported chains. V1: Native and ZRO fees paid by users for cross-chain messages routed through the LayerZero V1 endpoint, summed from WithdrawNative and WithdrawZRO events on UltraLightNodeV2 contracts across supported chains. Withdrawals lag the actual send() events by the worker/treasury withdrawal cadence; totals converge over time