Chainlink VRF V2 升级至 VRF V2.5

[eddiehsu66]

What type of PR is this (这是什么类型的PR)

• Typo(勘误)
• BUG(程序错误)
• Improvement(提升)
• Feature(新特性)

Which issue(s) this PR fixes(Optional) (这个PR 修复了什么问题 (可选择))

• resolve : (39. 链上随机数) 适配于Chainlink VRF v2.5的Random.sol #738, 39. 链上随机数：本地测试 #607

What this PR does / why we need it (这个PR 做了什么/ 我们为什么需要这个PR)

当前Chainlink官网不支持VRF V2，获取的subId从uint64变为了uint256，需要进行迁移

[XdpCs]

@eddiehsu66 pr需要引用解决的相关问题 我已经帮你引用上了 下次希望能够引用一下解决的问题 你的代码这几天 我会去本地测试的 谢谢你的贡献

[XdpCs]

#607 是需要支持预言机本地化 如果可以的话 能否在这个pr中支持

[eddiehsu66]

okok，我重新看一下文档整理一下

#607 是需要支持预言机本地化 如果可以的话 能否在这个pr中支持

[XdpCs]

okok，我重新看一下文档整理一下

#607 是需要支持预言机本地化 如果可以的话 能否在这个pr中支持

好 辛苦大佬

[eddiehsu66]

#607 是需要支持预言机本地化 如果可以的话 能否在这个pr中支持

OKOK，已支持预言机本地化测试，已提交

[XdpCs]

#607 是需要支持预言机本地化 如果可以的话 能否在这个pr中支持

OKOK，已支持预言机本地化测试，已提交

辛苦辛苦 争取下周 review完

[Copilot]

Pull Request Overview

This PR upgrades the Chainlink VRF V2 integration to VRF V2.5, updating consumer contracts, type definitions, imports, and documentation accordingly.

• Swapped out VRFConsumerBaseV2 for VRFConsumerBaseV2Plus and updated all import paths and constructor calls.
• Changed subId from uint64 to uint256 and updated coordinator addresses and key hashes.
• Refactored requestRandomWords calls to use VRFV2PlusClient.RandomWordsRequest with ExtraArgsV1, added a mock contract for local testing, and expanded the README with remix setup instructions.

Reviewed Changes

Copilot reviewed 4 out of 10 changed files in this pull request and generated 3 comments.

File	Description
39_Random/readme.md	Updated docs for VRF V2.5 usage, added local test guide, corrected addresses and sample calls
39_Random/VRFCoordinatorV2_5Mock.sol	Introduced mock import for VRFCoordinatorV2_5Mock to enable local testing in remix
39_Random/RandomNumberConsumer.sol	Migrated consumer contract to use VRFConsumerBaseV2Plus, updated types, imports, and request API
39_Random/Random.sol	Migrated NFT contract to use VRFConsumerBaseV2Plus, updated types, imports, and request API

Comments suppressed due to low confidence (2)

39_Random/RandomNumberConsumer.sol:63

• [nitpick] The parameter s_randomWords uses the s_ prefix (typically for storage); consider renaming to randomWords or similar for clarity and consistency with _requestId.

    function fulfillRandomWords(uint256 _requestId, uint256[] calldata s_randomWords) internal override {

39_Random/Random.sol:110

• [nitpick] Similarly here, s_randomWords could be renamed to avoid the storage-prefix convention and match the _requestId style.

    function fulfillRandomWords(uint256 _requestId, uint256[] calldata s_randomWords) internal override{

[Copilot]

[nitpick] Consistently capitalize 'Chainlink' instead of 'ChainLink' to match product branding.

Suggested change

	ChainLink也提供了在remix本地进行测试的方案。
	Chainlink也提供了在remix本地进行测试的方案。

[Copilot]

Typo in 'requesetid'—it should be 'requestId' to match the code examples.

Suggested change

	点击左侧`mintRandomVRF`，发起随机数请求，可以通过查询`requesetid`来查看发起的请求ID。
	点击左侧`mintRandomVRF`，发起随机数请求，可以通过查询`requestId`来查看发起的请求ID。