主页EIPs周刊
EIPsEIP-4803
EIP-4803

Limit transaction gas to a maximum of 2^63-1

Valid transactions must have a reasonable gas limit
ReviewStandards Track: Core
创建时间: 2022-02-02
Alex Beregszaszi (@axic)
社区讨论原文链接编辑
1 分钟了解
欢迎补充好内容
去提交
相关视频
欢迎补充好内容
去提交
正文

Abstract

Limit transaction gas to be between 0 and 2^63-1.

Motivation

The gas limit field in the transaction is specified to be an arbitrary long unsigned integer, but various clients put limits on this value. This EIP brings a reasonable limit into consensus.

Specification

Introduce one new restriction retroactively from genesis: any transaction is invalid and not includeable in a block, where the gas limit exceeds 2^63-1.

Rationale

2^63-1 vs 2^64-1

2^63-1 is chosen because it allows representing the gas value as a signed integer, and so the out of gas check can be done as a simple "less than zero" check after subtraction.

Consider 2^31-1

An alternative is considering a lower limit, because this can be handled easily in Javascript, since it handles numbers as floating point (the actual upper bound is 2^53-1).

Current limit

Due to the nature of RLP encoding, there is no fixed upper bound for the value, but most implementations limit it to 256-bits. Furthermore, most client implementations (such as geth) internally handle gas as a 64-bit value.

Backwards Compatibility

While this is a breaking change, no actual effect should be visible.

Before EIP-1559 it was possible to include transactions with gasPrice = 0 and thus the gasLimit * gasPrice <= accountBalance calculation could have allowed for arbitrarily large values of gasLimit. However, the rule that the transaction list cannot exceed the block gas limit, and the strict rules about how the block gas limit can change, prevented arbitrarily large values of gasLimit to be in the historical state.

Security Considerations

None.

Copyright and related rights waived via CC0.

扩展阅读
欢迎补充好内容
去提交

不想错过最新的 EIP 动态?

订阅 EIPs Fun 周刊以跟进相关更新,建⽴你与 EIP 之间的连接 ,更好地建设以太坊。

详情
支持以太坊贡献者,推动生态建设
资源
GitHub
支持社区