Neither the node nor the miner needs a mnemonic. The node needs only the
32-byte preimage, from which it derives the reward address; the mining
protocol carries no reward address at all, so the miner cannot know it.
Deriving an inner_hash from a wallet is a one-time offline step and has
no business happening on the deploy workstation. infra-setup.sh now
accepts only the inner_hash, validates it is 0x + 64 hex, and refuses a
mnemonic outright. quantus-node itself refuses --words/--seed as argv
for the same reason: argv is world-readable and recorded in shell
history and audit logs.
This drops the seed phrase, the temporary binary download and the local
key derivation from the provisioning path entirely.
Node on bob, external GPU miner on benjy, split because
--miner-listen-port disables the node's built-in CPU mining.
The PoW is Poseidon2 over Goldilocks: register-resident, no memory
hardness, dominated by 64-bit modular multiplication. Measured on the
fleet, GPU beats CPU by ~200x (RTX 5090 368 MH/s @ 600W, RTX 4090
183 MH/s @ 450W, Ryzen 9 9950X3D 4.15 MH/s), so CPU mining is disabled
everywhere including on the GPU hosts.
The workflow deploys or validates. Validate mode asserts the hash
counter is advancing and the GPU is drawing power, because a miner that
enumerated no adapter and a node authoring nothing both look healthy to
systemctl is-active.
infra-setup.sh provisions the scoped gitea_ci accounts, generates the
node's libp2p key (the node refuses to start without one and it must
never be rotated by a deploy), and derives the reward preimage from a
seed phrase on stdin. It deliberately will not mint a fresh wallet: that
phrase is escalation-grade and fails agent-credentials.md §1.
Rob Thijssen
