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String
Pool fee rate in the protocol’s native encoding.
Float
Pool fee rate normalized to basis points (1 bps = 0.01%).
String
Pool fee absolute amount in the fee token’s smallest unit.
Boolean
True when the pool fee is dynamic (e.g. UniswapV4 hooks, AlgebraIntegral plugins).
Boolean
True when poolFeeBps is a protocol-level estimate rather than an exact per-pool or per-swap value (e.g. MintClub averaged mint/burn royalties).
String
Base fee portion of gas cost in native token smallest unit (wei for EVM, lamports for Solana). baseFeePerGas * gasUsed on EVM, 5000 lamports * signatures on Solana.
String
Priority fee / gas tip in native token smallest unit. (effectiveGasPrice - baseFeePerGas) * gasUsed on EVM, meta.fee - baseFee on Solana.
String
Gas units consumed by the transaction (EVM gas units or Solana compute units).
Int
Which pool slot (0 or 1) poolFeeAmountRaw is denominated in, when the pool’s slots are not measured in the same currency (e.g. a native slot); null otherwise.
Int
Which pool slot (0 or 1) the protocol fee amount is denominated in, when the pool’s slots are not measured in the same currency; null otherwise.
String
Direct payment to the block builder in native token smallest unit. Sum of ETH transfers to block.coinbase on EVM, or Jito tip on Solana.
String
L1 data posting fee in native token smallest unit (L2 rollups only: Base, Optimism, etc.).
Int
Number of DEX events in this transaction. Used to pro-rate transaction-level fees per event.
SupplementalFeeData
union
Protocol-specific supplemental fee data (e.g. Pump cashback). See SupplementalFeeData

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Last modified on August 28, 2026