D-Chain fees denominate in the ONE canonical L0 asset constants.UTXO_ASSET_ID (the
brand-neutral LUX UTXO literal), not the local network's UTXO asset. So any L2/L3
building on LUX with its own native currency still settles DEX fees to LUX. The fee
policy is network-independent (newFeePolicy() takes no networkID); the MinTxFeeFloor
gate is enforced in LUX on every chain. UTXO_ASSET_ID is the correct reference (D-Chain
is UTXO; an EVM-context DEX would use the EVM-native LUX). networkID retained as chain
identity only. Tests: fee asset is canonical LUX not local native; floor holds on an L2;
native->LUX deterministic; zero-fee rejected; min-fee accepted. dexvm green.
zeekay
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