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SecureMultiSig
AdvancedQuantum-resistant multi-signature wallet with threshold signatures and advanced security features
Overview
SecureMultiSig is a sophisticated multi-signature wallet that combines traditional multisig functionality with QuantumPrivate's quantum-resistant cryptography. It enables multiple parties to jointly control assets, requiring M-of-N signatures for transaction execution, with full protection against quantum attacks.
Key Features
- M-of-N threshold signatures
- Quantum-resistant signatures
- Dynamic signer management
- Transaction queuing
Use Cases
- • DAO treasury management
- • Corporate asset custody
- • Joint account ownership
- • Escrow services
Key Features
Threshold Signatures
Configure M-of-N signature requirements, allowing flexible approval workflows. For example, require 3 out of 5 signers to approve a transaction.
function submitTransaction(address to, uint256 value, bytes memory data) public onlySigner {
transactions.push(Transaction({to: to, value: value, data: data, executed: false}));
emit TransactionSubmitted(transactions.length - 1, msg.sender);
}Quantum-Resistant Cryptography
All signatures use post-quantum cryptographic algorithms, ensuring security against both classical and quantum computer attacks. Uses lattice-based signatures for maximum security.
Dynamic Signer Management
Add or remove signers with consensus from existing signers. Update the signature threshold as organizational requirements change.
function addSigner(address newSigner) public onlyMultiSig
function removeSigner(address signer) public onlyMultiSig
function changeThreshold(uint256 newThreshold) public onlyMultiSigSecurity Model
Security Considerations
- • Carefully select trusted signers during initialization
- • Set appropriate threshold values (too low reduces security, too high reduces availability)
- • Regularly audit signer list and remove inactive or compromised signers
- • Consider using timelocks for high-value transactions
Protection Mechanisms
- •Replay Protection: Each transaction includes a unique nonce to prevent replay attacks
- •Quantum Resistance: Post-quantum signature schemes protect against quantum computers
- •Access Control: Only approved signers can submit and confirm transactions
Deployment
Deploy with Constructor Arguments
# Deploy SecureMultiSig with 3-of-5 threshold
qp-cli deploy SecureMultiSig.sol --constructor-args [
["0x123...", "0x456...", "0x789...", "0xabc...", "0xdef..."],
3
]
# Deploy to mainnet with verification
qp-cli deploy SecureMultiSig.sol --network mainnet --verify --constructor-args [
["0x123...", "0x456...", "0x789..."],
2
]Contract Interaction
Submit a Transaction
// Submit a new transaction
const tx = await multiSig.submitTransaction(
recipientAddress,
ethers.utils.parseEther("10"),
"0x" // empty data for ETH transfer
);
// Get transaction ID from event
const receipt = await tx.wait();
const txId = receipt.events[0].args.transactionId;
console.log("Transaction submitted:", txId.toString());Confirm and Execute
// Each signer confirms the transaction
await multiSig.connect(signer1).confirmTransaction(txId);
await multiSig.connect(signer2).confirmTransaction(txId);
await multiSig.connect(signer3).confirmTransaction(txId);
// Once threshold is met, execute
await multiSig.executeTransaction(txId);
// Check transaction status
const isExecuted = await multiSig.isExecuted(txId);
const confirmations = await multiSig.getConfirmationCount(txId);Manage Signers
// Add a new signer (requires multisig approval)
const addTx = await multiSig.submitTransaction(
multiSig.address,
0,
multiSig.interface.encodeFunctionData("addSigner", [newSignerAddress])
);
// Remove a signer (requires multisig approval)
const removeTx = await multiSig.submitTransaction(
multiSig.address,
0,
multiSig.interface.encodeFunctionData("removeSigner", [signerAddress])
);
// Change threshold (requires multisig approval)
const changeTx = await multiSig.submitTransaction(
multiSig.address,
0,
multiSig.interface.encodeFunctionData("changeThreshold", [4])
);Explore More Advanced Contracts
Check out other advanced examples demonstrating privacy and governance features
The enterprise-grade blockchain protocol for the post-quantum era. Built for institutions and people who demand safety, privacy, and compliance in the quantum era.
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support@quantumprivate.org
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