Solidity Library by Clober

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Implementation of Clober library contracts: SegmentedSegmentTree, OctopusHeap, and more.

• SegmentedSegmentTree
• OctopusHeap

Features

• SegmentedSegmentTree: A gas-efficient segment tree with a fixed size to support 32768 leaf nodes.
• OctopusHeap: A heap data structure that can store up to 256 uint16 values. Optimized for popping values in close proximity to each other.
• PackedUint256: Treats a uint256 as a group of uint8, uint16, or uint32 and adds, subtracts, or updates the elements of the group by indexing them.
• Create1: Utility functions regarding the vanilla CREATE operation.
• DirtyUint64: Adds, subtracts, and converts clean (original) and dirty (a non-zero representation of the original) uint64 values.

Installation

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npm install @clober/library

Testing

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We use hardhat for code coverage and foundry for fuzzing tests.

Check Code Coverage

npm run hardhat:coverage
open coverage/index.html

Run Fuzzing Tests

npm run forge:test

Visualization

Visual aid for OctopusHeap.

cd utils/visualization
pip install -r requirements.txt 
python octopus_heap.py

Audits

Audited by Spearbit from January to February 2023. All security risks are fixed. Full report is available here.

Licensing

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The primary license for Clober Library is the Time-delayed Open Source Software Licence, see License file.