Function getNextBaseFee

tests/helpers/SystemAccounting.ts:52–84

(client: PublicClient, blockNumber?: bigint)

}

export const getNextBaseFee = async (client: PublicClient, blockNumber?: bigint) => {
  const block = await client.getBlock({ blockNumber, includeTransactions: false })
  const isArc = isArcNetwork()

  const feeParams = await (async () => {
    try {
      return await ProtocolConfig.attach(client).read.feeParams({ blockNumber: block.number })
    } catch (_err) {
      return undefined
    }
  })()

  const nextEIP1559BaseFee = calc1559BaseFee(block.gasUsed, block.gasLimit, block.baseFeePerGas ?? 0n, feeParams)
  const { gasUsed, gasUsedSmoothed, nextBaseFee } = isArc
    ? await SystemAccounting.getGasValues(client, block.number)
    : { gasUsed: 0n, gasUsedSmoothed: 0n, nextBaseFee: 0n }
  const nextEMABaseFee = isArc
    ? feeParams
      ? clampBaseFee(calc1559BaseFee(gasUsedSmoothed, block.gasLimit, block.baseFeePerGas ?? 0n, feeParams), feeParams)
      : nextEIP1559BaseFee
    : nextEIP1559BaseFee

  return {
    block,
    gasValues: { gasUsed, gasUsedSmoothed, nextBaseFee },
    feeParams,
    next: {
      baseFeePerGas: isArc ? nextEMABaseFee : nextEIP1559BaseFee,
      emaBaseFee: nextEMABaseFee,
      eip1559BaseFee: nextEIP1559BaseFee,
    },
  }
}

type BaseFeeParams = {
  inverseElasticityMultiplier: bigint