Advanced-Smart-Contracts
This is an assignment for the Advanced SMart Contracts course. I have used contract upgradeability and signing and verification patterns.
Signing and Verification
The contract TranscriptVerification.sol handles the verification part. The signing part should be implemented off-chain with your own private key. Please use Signing.js for that.
Upgradeability
The Proxy.sol contract acts as the proxy contract that makes delegate call to Main.sol which implements the logic. State.sol holds the storage and InteractWithState.sol contains of getter and setter functions for the storage. When using the Proxy.sol for the first time, you will need to call the upgradeTo function to set the implementation. The deployed contract already has it set. When you need to upgrade the Main.sol contract, it is mandatory to inherit Main.sol in the upgraded contract and call the upgradeTo function of the Proxy.sol contract.
Contracts
Main.sol : 0x775dd47a6e2fc78c61796bd3afcb358c68891cf8
Proxy.sol : 0x29e8e4ce1ce60b44b1807bd1463a27142f27dec7
References
https://hackernoon.com/how-to-make-smart-contracts-upgradable-2612e771d5a2
https://medium.com/quillhash/how-to-write-upgradable-smart-contracts-in-solidity-d8f1b95a0e9a