Package Exports

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@a16z/contracts) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

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a16z Contracts

A repository for contracts written by a16z.

CantBeEvil License

The purpose of this repository is to provide an on-chain representation of the CantBeEvil license.

The CantBeEvil license is made available as a contract that can be inherited by any other contract.

There are six variants of the CantBeEvil license:

Exclusive Commercial Rights with No Creator Retention (“CB-ECR”) – Full exclusive commercial rights granted, with no hate speech termination. Creator does not retain any exploitation rights.
Non-Exclusive Commercial Rights (“CB-NECR”) – Full non-exclusive commercial rights granted, with no hate speech termination. Creator retains exploitation rights.
Non-Exclusive Commercial Rights with Creator Retention & Hate Speech Termination (“CB-NECR-HS”) – Full non-exclusive commercial rights granted, with hate speech termination. Creator retains exploitation rights.
Personal License (“CB-PR”) – Personal rights granted, without hate speech termination.
Personal License with Hate Speech Termination (“CB-PR-HS”) – Personal rights granted, with hate speech termination.
CC0 (“CB-CC0”) – All copyrights are waived under the terms of CC0 1.0 Universal developed by Creative Commons.

Installation

Install the Cant Be Evil License smart contracts in your hardhat project:

npm i @a16z/contracts

Usage

The license versions are represented on-chain as an enum.

enum LicenseVersion {
    CB_CC0,
    CB_ECR,
    CB_NECR,
    CB_NECR_HS,
    CB_PR,
    CB_PR_HS
}

Pass the desired version into the CantBeEvil constructor, as shown:

import {LicenseVersion, CantBeEvil} from "@a16z/licenses/CantBeEvil.sol";

contract MyContract is CantBeEvil(LicenseVersion.CC0) {
    ...
}

You can now call MyContract.getLicenseURI(), which will return an Arweave gateway link to the license text file.

MyContract.getLicenseURI() // => "https://arweave.net/d2k7..."

contracts/licenses/CantBeEvil.sol

This contract is meant to be inherited by NFT contracts and any contract that wishes to expose the getLicenseURI method.

contracts/examples/MyToken.sol

An example NFT contract that inherits CantBeEvil.