Hi everyone,
This is a quick heads-up for all builders, wallet developers, and node operators.
As part of the ongoing work to improve Flow’s economic sustainability and implement the changes proposed in FLIP 351: Transaction Fees Update, we will be updating transaction fees on Testnet next week on Monday, December 1st.
No change to mainnet
This update will apply the new fee parameters introduced in the FLIP, allowing the community to test the proposed changes end to end before they are considered for mainnet rollout.
What this means for you
- Transaction fees on Testnet will increase according to the new computation unit cost and inclusion fee defined in the FLIP.
- Applications and wallets that send transactions may require more FLOW tokens in their payer account.
- This is a great opportunity to verify:
- All payer logic continues to work
- App UX behaves as expected under the new fee levels
- Any transaction batching or estimation logic is updated
Please fund your Testnet payer accounts
To avoid any disruptions in your app or wallet during the fee update, please ensure your payer accounts have enough Testnet FLOW.
You can use the official faucet here:
Fund Account - Flow Testnet Faucet
Enter your Testnet account address and top up as needed.
For EVM Gateway operators
With the upcoming fee increase, the EVM Gateway COA account (the account specified via --coa-address) will pay more for the Cadence transactions it submits to Flow. This means the COA account will deplete faster than before.
- Please make sure your COA account is funded with sufficient FLOW.
The coinbase account (the account specified via --coinbase) receives EVM Gateway fees from EVM client transactions. To ensure the coinbase account recovers the FLOW spent by the COA account, you must update the Gateway’s --gas-price parameter. This also updates the minimum gas price shown to wallets such as MetaMask.
Our recommended setting is:
--gas-price=16038000000
This value corresponds to 16.038 Gwei.
Reference:
Full details of the proposal can be found in the FLIP:
This includes the motivation, fee parameter changes, and how the proposal aligns with Flow’s long term goal of sustainable, inflation neutral economics.