UnionBridgeMultiSig is a Solidity contract that uses MultiSigLib to provide membership-based majority voting for managing Union Bridge parameters.
It ensures only authorized members can vote on sensitive bridge operations such as increasing the locking cap or changing transfer permissions.

• MultiSig governance (via MultiSigLib):
  • Vote to add/remove members
  • Strict majority threshold (floor(n/2) + 1)
  • Prevents duplicate votes per proposal
  • Blocks removals if result would drop members < 3
• Bridge integration:
  • Vote to increase the locking cap
  • Vote to set transfer permissions
• Versioning:
  • Every membership change increments the multisig version
• Events:
  • Emitted for every membership or bridge governance action

Clone your repo and install dependencies:

# install foundry deps
forge install jeremy-then/MultiSigLib
forge install foundry-rs/forge-std

Deploy with an initial set of ≥ 3 unique addresses:

constructor(address[] memory initialMembers)

Example (Remix / Anvil):

[
  "0x5B38Da6a701c568545dCfcB03FcB875f56beddC4",
  "0xAb8483F64d9C6d1EcF9b849Ae677dD3315835cb2",
  "0x4B20993Bc481177ec7E8f571ceCaE8A9e22C02db"
]

• Vote to add a new member

  voteToAddNewMember(address candidate)

• Vote to remove an existing member

  voteToRemoveMember(address member)

• Vote to increase the locking cap

  voteToIncreaseUnionBridgeLockingCap(uint256 newLockingCap)

• Vote to change transfer permissions

  voteToSetUnionBridgeTransferPermissions(bool requestEnabled, bool releaseEnabled)

• isMember(address who) → bool
• getMembersCount() → uint256
• getThreshold() → uint256
• getMultisigVersion() → uint256
• getNewMemberVotesForThisCandidate(address candidate) → uint256
• getRemoveMemberVotesForThisMember(address member) → uint256
• amIAMember() → bool
• getLockingCapVotes() → uint256
• getTransferPermissionsVotes() → uint256

This project includes Foundry tests (test/UnionBridgeMultiSig.t.sol) with a MockBridge injected at the fixed bridge address via vm.etch.

Run tests:

forge test -vv

MIT