MultiSig Vault

The dApp drives the MultiSigWallet contract on the Sepolia testnet (2-of-3). Six steps, all from this page:

1. Connect your wallet — press Connect Wallet (top-right) and make sure your wallet is on Sepolia; the chain badge shows the network.
2. Fund the vault — type an amount in the Fund this vault box and press Deposit ETH; the ETH lands in the shared treasury.
3. Propose a transaction — fill Destination, Value (ETH) and optional Calldata in Propose a transaction, then press Submit.
4. Confirm or revoke — open the transaction in the Transactions list and press Confirm; press Revoke while it is still pending to undo your vote.
5. Execute — once confirmations reach the threshold (2-of-3), any signer presses Execute and the funds or calldata call leave the vault.
6. Tune & watch — signers can change the threshold in Wallet Settings, and Live Activity (↻ Refresh) streams every event from the chain.

Every action on this page submits a signed transaction to the project's contracts:

1. Pressing Deposit ETH sends value straight to the MultiSigWallet contract; its receive() fallback emits a Deposit event and the vault balance updates on-chain.
2. Submit calls submitTransaction(destination, value, data) — MultiSigWallet appends a Transaction struct to its transactions array and emits Submission; the array index becomes your txId.
3. Each Confirm calls confirmTransaction(txId) — MultiSigWallet sets confirmations[txId][owner] and increments confirmationCounts[txId], emitting Confirmation; Revoke calls revokeConfirmation(txId) to undo a pending confirmation.
4. At the threshold, Execute calls executeTransaction(txId) — MultiSigWallet sets executed = true before the external call, while the inherited ReentrancyGuard contract's nonReentrant modifier blocks re-entrant re-execution.
5. The call {value, data} runs on the destination: success emits Execution and the funds move; failure rolls the flag back, emits ExecutionFailure and keeps every confirmation so the transaction can be retried.
6. Any signer can call changeThreshold(newThreshold) on MultiSigWallet — it reverts unless 1 ≤ threshold ≤ owners.length, then emits ThresholdChanged.