Gas mechanics
| Key | Value |
|---|---|
| Unit | USDC (18 decimals) |
| Pricing | EIP-1559–like base fee with exponentially weighted moving-average smoothing |
| Base fee (testnet) | 20 Gwei minimum |
| Best practice | Surface gas fees in USDC; fetch the current base fee dynamically before submitting transactions by calling eth_gasPrice or eth_feeHistory on the Arc Testnet RPC |
The 18-decimal precision shown above applies to Arc’s native gas accounting.
USDC on Arc also provides a standard ERC-20 interface with 6
decimals that matches
USDC on other EVM networks. For application-level transfers and balance
display, use the ERC-20 interface. See contract
addresses for details.
Policy overview
- The base fee is dynamically adjusted using a bounded, moving-average mechanism designed to stabilize around 20 Gwei under normal network load.
- Transactions submitted with a max fee below 20 Gwei may remain pending or fail to execute.
- To ensure timely inclusion, set
maxFeePerGas ≥ 20 Gwei.
Monitoring
You can view real-time gas metrics and recent averages using the Arc Gas Tracker.This configuration applies to the Arc Testnet and may evolve as network
parameters are tuned for mainnet launch.