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## 实现
```solidity
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.11;
/**
* @title Maintains a doubly linked list keyed by bytes32.
* @dev Following the `next` pointers will lead you to the head, rather than the tail.
*/
library LinkedList {
// 链表节点
...
**Job Responsibilities**
- Develop and optimize smart contracts on Solana/Arweave;
- Participate in Dapp architecture design and construction, ensuring system performance, scalability, and security;
- Implement high-performance backend services, design systems as per requirements, and deliver o...