This is a reference implementation for the ERC-7656 standard taken from the Cruna Protocol implementation, which also has full coverage of the smart contracts.
The following bytecode:
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
has been deployed to erc7656.eth, i.e.:
0x7656f0fB4Ca6973cf99D910B36705a2dEDA97eA1
via Nick's Factory using the following salt:
0x765600000000000000000000000000000000000000000000000000000000cf7e
on the following mainnets:
Etherum
Polygon
BNB Chain
Base
and the following testnets:
Sepolia
Avalanche Fuji
Celo Alfajores
Base Sepolia
Arbitrum Sepolia
Polygon Amoy
The code has been verified on most mainnets.
Look at contracts/bytecode.json for the details.
Install it as a dependency
npm i erc7656 @openzeppelin/contracts
To make your plugin extend exr7656/ERC7656Service.sol or erc7656/extensions/ERC7656ServiceExt.
Look at BadgeCollector.sol for a simple example.
Notice that anyone can deploy a service owned by a specific token, using whatever salt they prefer. To avoid troubles and security issues, any initial setup must be designed so that, despite who is the deployer, the result is what is expected to be. For example, if a service must get some information from the token, it should be the service the one that queries the token, not the other way around. In other words, passing any parameter to the service during the deploying opens to the possibility of a malicious deployer to pass a different set of data causing the service to behave unexpectedly.
The test coverage of this repo is close to 100% but if you run the coverage script you will get ~92% because Solidity-coverage seems unable to see that the function create and compute in ERC7656Registry are actually tested. If anyone has any idea how to fix this, please let me know.
MIT
Copyright (C) 2023+ Cruna