Validate Ownership

[digimbyte]

I am working on some tools for blockchain and Neo, but part of this requires that users are able to validate ownership on the chain.
its common for developers to create a getOwner() script but its not a standard. this means that without these on contracts that we risk any user claiming ownership of that contract and fraudulently configuring for those contracts.

I propose a universal standard to find a contracts current owner address, allowing websites and tools to validate contracts and any configuration related to them and their respective developers, owners, etc.

an alternative is a forced mint or transaction on the contract to validate ownership rights similar to DNS validation but on the blockchain itself.

looking to see what options exist and what solutions we can bring to better integrate validation and security to neo projects.

[roman-khimov]

Some getOwner/setOwner pair seems to be appropriate here.

[cschuchardt88]

I think it should emit an event too.

As Follows:

private const byte Prefix_Owner = 0x02;

[InitialValue("<Owner Address Here>", Neo.SmartContract.ContractParameterType.Hash160)]
private static readonly UInt160 InitialOwner = default;

[Safe]
public static UInt160 GetOwner()
{
    var currentOwner = Storage.Get(new[] { Prefix_Owner });

    if (currentOwner == null)
        return InitialOwner;

    return (UInt160)currentOwner;
}

private static bool IsOwner() =>
    Runtime.CheckWitness(GetOwner());

public delegate void OnSetOwnerDelegate(UInt160 newOwner);

[DisplayName("SetOwner")]
public static event OnSetOwnerDelegate OnSetOwner;

public static void SetOwner(UInt160 newOwner)
{
    if (IsOwner() == false)
        throw new InvalidOperationException("No Authorization!");
    if (newOwner != null && newOwner.IsValid)
    {
        Storage.Put(new[] { Prefix_Owner }, newOwner);
        OnSetOwner(newOwner);
    }
}

[shargon]

We should create a nep standard for this