Arc, read live

Arc’s consensus is deterministic: a block is final when it is produced, so all three tags name the head (a tag read a moment after the head can even be one ahead). On Ethereum finalized trails by two epochs, about 13 minutes. Thenar shows a run as paid when its receipt arrives, because on Arc that is final.

Read for the protocol on Arc. Arc’s native balance is USDC and the ERC-20 at 0x3600…0000 is a view of it, so an operator’s earnings pay their gas. Arc charges the gas a transaction uses; every Thenar write sends the node’s estimate plus a fifth as its limit (lib/arc-gas.ts).

A key made in this page just now, a signature from it, and Arc’s precompile asked to check it. Passkeys sign with this curve, which is how PasskeyRegistry checks an operator’s passkey on chain.

Arc’s Memo extension calls a contract as the transaction’s own sender and logs a tag with it. Thenar submits every run through it, tagged with the run id, so a payout says what it paid for. The probe wraps a USDC transfer that must fail as a dead address; only a node running CallFrom returns that failure wrapped in Memo’s CallFailed.