KIP 223: Transaction data gas cost reduction
| Author | Lake |
|---|---|
| Discussions-To | https://github.com/kaiachain/kips/issues/22 |
| Status | Draft |
| Type | Core |
| Created | 2024-10-18 |
Abstract
Reduce the calldata gas costs to the EIP-2028 level. The purpose is to achieve better compatibility with Ethereum-oriented SDKs and tools.
Motivation
The adoption of EIP-2028 will improve the compatibility with ERC-4337 ecosystem tools.
Since the introduction of ERC-4337, several bundler software solutions have been developed.
The bundler’s eth_estimateUserOperationGas API calculates the gas required for a UserOperation.
The calculation depends on the calldata costs in a UserOperation.
The issue is that some tools assumes EIP-2028 rule unless explicitly configured, making their result incompatible with Kaia.
This proposal introduces a new hardfork that aligns the calldata cost calculation to that of EIP-2028.
Specification
The gas cost for calldata is determined by the number of non-zero and zero bytes, with each non-zero byte costing 16 gas units and each zero byte costing 4 gas units.
Overview
The calldata costs has been depending on the transaction types and hardfork levels.
Since the genesis block, calldata gas calculation was calculated using the formula:
Transaction type 0 (Legacy):
nonzero_bytes_in_calldata * 68 + zero_bytes_in_calldata * 4
Other types:
nonzero_bytes_in_calldata * 100 + zero_bytes_in_calldata * 100
Since the Istanbul hardfork, the calculation was simplified to the latter:
For all transaction types: nonzero_bytes_in_calldata * 100 + zero_bytes_in_calldata * 100
This proposal introduces a new hardfork in which the formula will be:
For all transaction types: nonzero_bytes_in_calldata * 16 + zero_bytes_in_calldata * 4
which is identical to EIP-2028.
Backward Compatibility
The gas pricing change is backwards incompatible since the hardfork.
SDKs and Wallets will be able to continue operating with no change as they usually use eth_estimateGas API.
References
Copyright
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