SafleID Registration Implementation

[sshubhamagg]

1. Implement registration function:

   function registerID(
       uint256 id,
       address primaryWallet,
       bytes memory signature
   ) external payable onlyRegistrar
   

2. Implement signature verification:

   function verifyPrimarySignature(
       uint256 id,
       address primaryWallet,
       bytes memory signature
   ) internal view returns (bool)
   

Requirements:

1. Transaction must include registration fee
2. Contract must be unpaused
3. Caller must be registered registrar
4. Signature must be valid
5. ID must not exist
6. Primary wallet must not be registered

Events Emitted:

IDRegistered(
    uint256 indexed id,
    address indexed primaryWallet,
    address indexed registrar,
    uint256 fee
)

RegistrationFailed(
    uint256 indexed id,
    address primaryWallet,
    address registrar,
    string reason
)


event IDRegistrationCompleted(
    uint256 indexed id,
    address indexed primaryWallet,
    uint256 fee
);

event IDRegistrationFailed(
    uint256 indexed id,
    address primaryWallet,
    string reason
);

event FeeCollected(
    uint256 indexed id,
    uint256 amount,
    address indexed collector
);