Igneum Wallet holds the key the miner makes for you. MetaMask works too.
+24 words, a password, and the key is sealed on your disk. Nothing leaves. Import the miner's payout key with one click.
The wallet checks the finality certificate itself, with the node's own code. Every transfer shows pending, in a block, or final.
Block rewards, proving payouts and transfers in one list. Send with the fee shown. Receive by QR, drawn on your machine.