This is a simple Solidity-based Multi-Signature Wallet (MultiSig) smart contract. It allows a set of predefined signers to approve and execute token transfers only when a quorum is met. Additionally, the contract allows for updating the quorum, with signer approvals required for the change to take effect.
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Features
- Transaction Creation: Any valid signer can propose a transfer of tokens.
- Transaction Approval: Transactions require approval from a number of signers equal to the quorum to be executed.
- Quorum Update: The contract allows updating the quorum, with a similar approval mechanism as transactions.
- Withdrawals: Signers can initiate and approve withdrawals from the contract balance.
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Requirements
- Solidity ^0.8.0
- Hardhat development environment OpenZeppelin's ERC20 library for token handling
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Error Handling
- ZeroAddressDetected: Thrown when attempting to use a zero address.
- InvalidTransaction: Thrown when trying to approve or execute an invalid transaction.
- TransactionCompleted: Thrown when trying to approve an already completed transaction.
- InsufficientBalance: Thrown when attempting to withdraw or transfer more than the contract balance.
- CannotSignTransactionTwice: Thrown when a signer attempts to approve the same transaction multiple times.
- NotAValidSigner: Thrown when a non-signer attempts to interact with the contract.
- NotAValidQorum: Thrown when an invalid quorum is proposed or set.
Below is a snapshot of the test cased passed for the smart contract.
