Yes, the native token of the Sei Network, $SEI, is the sole token used for paying gas fees for all transactions within the Sei EVM environment.
Unified Gas Token:
Unlike some chains that might use different tokens for different virtual machines or layers, Sei uses $SEI consistently across its entire platform:
- EVM Transactions: When you send a transaction to interact with a Solidity smart contract, deploy a contract, or even just transfer $SEI between EVM addresses (
0x...), the gas cost is calculated and deducted from your EVM address's $SEI balance. - Native Transactions: Similarly, if you perform native actions like staking $SEI or voting on governance proposals using your native
sei1...address, the gas fees for those transactions are also paid in $SEI, deducted from your native address's balance.
Important Distinction: Balances are Separate
While the same $SEI token is used, the balance held by your EVM (0x...) address is distinct from the balance held by your Native (sei1...) address.
- To pay for EVM transaction gas, you need $SEI specifically in your EVM address balance (visible in MetaMask).
- To pay for native transaction gas, you need $SEI in your Native address balance.
If your EVM address balance is zero, you cannot send EVM transactions, even if you have $SEI in your associated native address. You must first transfer $SEI from your native address to your EVM address.
Fee Mechanism (EIP-1559):
Sei EVM implements a fee mechanism similar to Ethereum's EIP-1559, featuring:
- A dynamic Base Fee (paid in $SEI per unit of gas) that adjusts based on network congestion.
- A Priority Fee (or tip, paid in $SEI per unit of gas) that you can add to incentivize validators to include your transaction faster.
The total EVM transaction fee is calculated as: (Base Fee + Priority Fee) * Gas Used (paid in $SEI).
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