Chiro Hiro

Develop zkDatabase SDK (client package)

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For alpha version we have [zkdb package](https://www.npmjs.com/package/zkdb) this package name should be used for our SDK

Implement `CommitmentSchemes` trait that can support multiple commitment scheme. Suggest method: - `setup()` - `open()` - `commit()` - `witness()`

Fix license issue of the third party code

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This pull request update some license files to make sure that this repo follows a good practice of open source code of conduct. I removed this part from the license...

Implement `Drop` for `Entropy` and remove `Copy`

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## Motivation 1. Remove `Copy` from `Entropy` to make sure that this value won't be copied without notice, since anyone can reconstruct private key from this entropy 2. Implement `Drop`...

Implement ERC-6366: Permission Token and ERC-6617: Bit Based Permission

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**🧐 Motivation** Special roles like `Owner`, `Operator` are common for many smart contracts because permissioned addresses are used to administer and manage them. It is difficult to audit and maintain...