Dynamic Transaction Fee Test on Mainnet on Monday, Sept 8th, 15:00 UTC to Sept 12th, 15:00 UTC

Announcements
1

The Dynamic Transaction Fee test on Testnet was conducted successfully last week. We will now run a smaller-scale test on Mainnet to validate that upstream and downstream systems (wallets, dApps, explorers, etc.) adjust to higher transaction fees automatically.

Date/Time: Monday, September 8th, 15:00 UTC (8:00 AM Pacific) → Friday, September 12th, 15:00 UTC (8:00 AM Pacific)

What to Expect

  • The surge factor will be raised from 1.0 to 1.01 (a 1% increase to transaction fees) by the service committee.

  • dApps and wallets are expected to automatically adjust by paying the correct transaction fees.

  • Our team will be monitoring transaction error rates and system behavior throughout the test.

Funding Reminder

If you notice your dApps or wallets being depleted faster during the test, please fund them with additional FLOW.

How to Track the Current Surge

  1. Query the chain via a script

    // get_surge_factor.cdc
import "FlowFees"
access(all) fun main(): UFix64 {
    return FlowFees.getFeeParameters().surgeFactor
}

    Run with:

    flow scripts execute get_surge_factor.cdc -n mainnet

  2. Track FeeParametersChanged event
    When the surge factor changes, the FeeParametersChanged event is emitted by the FlowFees contract. Query it with:

    flow events get A.8624b52f9ddcd04a.FlowIDTableStaking.RewardsPaid \
  --start <start block height> \
  --end <end block height> \
  -n testnet

  3. Flowscan.io now has a new field to display surge

    Screenshot 2025-09-04 at 3.15.21 PM

thank you,

Flow team

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2

Transaction Fees on mainnet are now at 1.01

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