BlockchainBeginner#Basics#Cost
Gas Fees
G
Definition
A network-specific transaction-execution charge. On Ethereum, the fee depends on gas used and the transaction's effective gas price; a wallet estimate is not a guarantee of execution, final outcome, or total cost on another network.
Source reviewed
- Ethereum.org: Gas and fees opens in a new tab
Supports: Explains gas, gas limits, EIP-1559 fee fields, fee calculation, unused gas, fee burning, and reverted transactions on Ethereum.
- EIP-1559: fee market change opens in a new tab
Supports: Specifies the base fee, priority fee, maximum fee, effective gas price, refunds for unused gas, and base-fee burning for the EIP-1559 transaction type.
Concept Diagram
Key Takeaways
1
Gas measures execution work; the fee is separate from the asset amount sent
2
A gas limit and a maximum fee are constraints, not a promise of inclusion or success
3
Under EIP-1559, Ethereum's base fee changes with block usage and is burned
4
Fee rules and wallet estimates are network-specific; a reverted call can still consume gas
Practical Example
A wallet proposes an EIP-1559 transaction with a gas limit, max fee, and priority fee. The user verifies the chain and calldata before signing. If the contract reverts, no intended swap or transfer is completed, but the gas used by the attempted execution can still be charged. The same numbers must not be copied to a different chain.
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Related Terms
Blockchain
Gasless TradingA sponsored or relayed transaction flow in which someone other than the sender initially pays network gas. It may let a user avoid holding the native token, but it does not remove fees, signature risk, approvals, price or slippage risk, or the possibility of failed execution.
Blockchain
EVM (Ethereum Virtual Machine)Ethereum's execution environment: a deterministic virtual machine that executes smart-contract bytecode as part of Ethereum state transitions. EVM compatibility does not make contracts, addresses, assets, or deployments interchangeable across networks.
Blockchain
Layer 2 (L2)A protocol layer that executes transactions outside an L1 while using that L1 for some combination of data availability, proofs, dispute resolution, or settlement. Fees, finality, bridges, and withdrawal paths depend on the specific L2 design.
Blockchain
Smart ContractA program and its state deployed at a blockchain address, which runs its defined functions when transactions call it.
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