MultiOwnable¶

Overview¶

MultiOwnable is an abstract contract providing multi-owner access control. Unlike OpenZeppelin's Ownable which has a single owner, MultiOwnable allows multiple addresses to have owner privileges simultaneously.

Kind: Abstract Contract
License: Sharia
Solidity: ^0.8.21
Source: lib/multiownable.sol

Inheritance Chain (C3 Linearized)¶

No base contracts; this contract has no parents.

Immediate Parents¶

None (root of its hierarchy).

What This Means For Players¶

Plain English Summary: MultiOwnable allows shared control - it lets multiple people manage the same thing. Instead of having just one admin, a contract can have many admins who all have equal power. This is essential for the Dysnomia ecosystem where game contracts need to interact with each other.

Real-World Analogy: Think of a shared bank account that has multiple signatories. Any of the signatories can make transactions - you don't need everyone to approve. MultiOwnable works the same way: if you're on the list of owners, you can control the contract.

How It Affects Your Gameplay: - Shared access - Your LAU, SHIO, and other tokens may have multiple owners (you + game contracts) - Chain of trust - Game contracts add each other as owners to enable coordination - Revocable - Owners can be added or removed by existing owners

State Variables¶

Variable	Type	Visibility	Mutability	Initial Value	NatSpec
`_owners`	`mapping(address => bool)`	private	mutable	``

Modifiers¶

Modifier	Parameters	NatSpec
`onlyOwners`	(none)

Events¶

Event	Parameters	Anonymous	NatSpec
`OwnershipUpdate`	address indexed newOwner, bool indexed state	no

Errors¶

Error	Parameters	NatSpec
`OwnableUnauthorizedAccount`	address origin, address account, address what
`OwnableInvalidOwner`	address origin, address owner, address what

Constructor¶

constructor¶

constructor(address initialOwner)

Parameters: address initialOwner

Functions¶

External & Public¶

owner¶

function owner() external view virtual returns (address)

Visibility: external
State Mutability: view
Virtual: yes
Returns: address

owner¶

function owner(address cOwner) public view virtual returns (bool)

Visibility: public
State Mutability: view
Virtual: yes
Parameters: address cOwner
Returns: bool

renounceOwnership¶

function renounceOwnership(address toRemove) public virtual onlyOwners

Visibility: public
Virtual: yes
Modifiers: onlyOwners
Parameters: address toRemove

addOwner¶

function addOwner(address newOwner) public virtual onlyOwners

Visibility: public
Virtual: yes
Modifiers: onlyOwners
Parameters: address newOwner

Internal¶

_checkOwner¶

function _checkOwner() internal view virtual

Visibility: internal
State Mutability: view
Virtual: yes

_changeOwnership¶

function _changeOwnership(address cOwner, bool cState) internal virtual

Visibility: internal
Virtual: yes
Parameters: address cOwner, bool cState

Modifier¶

onlyOwners¶

modifier onlyOwners() {
    _checkOwner();
    _;
}

- Description: Restricts function access to owners only - Checks: Both msg.sender AND tx.origin - allows if either is an owner

Contract Interactions¶

Depended On By¶

DYSNOMIA - All tokens inherit this
Every contract in the ecosystem

Special Mechanisms¶

Dual Sender Check¶

The _checkOwner function checks both:

if (!owner(msg.sender) && !owner(tx.origin)) {
    revert OwnableUnauthorizedAccount(...);
}

This allows: - Direct calls from owner addresses - Calls through contracts where tx.origin is an owner - Factory patterns where the deploying contract is trusted

Initial Owner¶

Constructor requires a non-zero initial owner:

constructor(address initialOwner) {
    if (initialOwner == address(0)) {
        revert OwnableInvalidOwner(...);
    }
    _changeOwnership(initialOwner, true);
}

No Enumeration¶

Unlike some implementations, owners cannot be enumerated. You can only check if a specific address is an owner. This is a gas optimization trade-off.

Usage Pattern¶

contract MyContract is MultiOwnable {
    constructor() MultiOwnable(msg.sender) {}

    function adminFunction() public onlyOwners {
        // Only owners can call this
    }

    function addAdmin(address newAdmin) public onlyOwners {
        addOwner(newAdmin);
    }
}

Security Considerations¶

Any owner can add new owners
Any owner can remove any owner (including themselves)
No protection against removing all owners
tx.origin check enables some use cases but has known security implications
Consider carefully before using in high-security contexts

Compiled ABI¶

The compiled ABI below is produced by solc 0.8.21 from the exact source bytes hashed in the Contract Verification section. Consumers can paste it directly into ethers/web3/viem.

Click to expand JSON ABI

[
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "origin",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "owner",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "what",
        "type": "address"
      }
    ],
    "name": "OwnableInvalidOwner",
    "type": "error"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "origin",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "account",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "what",
        "type": "address"
      }
    ],
    "name": "OwnableUnauthorizedAccount",
    "type": "error"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "address",
        "name": "newOwner",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "bool",
        "name": "state",
        "type": "bool"
      }
    ],
    "name": "OwnershipUpdate",
    "type": "event"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "newOwner",
        "type": "address"
      }
    ],
    "name": "addOwner",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "cOwner",
        "type": "address"
      }
    ],
    "name": "owner",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "owner",
    "outputs": [
      {
        "internalType": "address",
        "name": "",
        "type": "address"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "toRemove",
        "type": "address"
      }
    ],
    "name": "renounceOwnership",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  }
]

Contract Verification¶

Property	Value
Keccak256 Hash	`0xd5bc09d51ea952718d51fc0c347aad20278f6a1c7a0fda63e40ea9317fbd7720`
Source URL	https://raw.githubusercontent.com/busytoby/atropa_pulsechain/main/solidity/dysnomia/lib/multiownable.sol
Hash Generated	2026-04-20T02:38:30Z