Addresses

Every NeuroChain address has the form neuro:<name>.<type>. The suffix says what the address is.

Suffix	What it is	How you get it	Cost
.human	Your wallet	Derived from your seed words	Free
.node	Validator	Registered by a .human owner	min_stake (default 10 000 NRO), locked as the validator's stake
.app	Smart contract address	Assigned on deploy, or a readable name registered by a .human owner	Deploy: the deploy fee only. Readable name: min_stake (default 10 000 NRO), burned
.vault	Multi-signature treasury	Registered by a .human owner	min_stake (default 10 000 NRO), burned
.agent	Smart account for AI agents (session keys, sponsored gas)	Registered by a .human owner	By name length, see prices

min_stake is a governance parameter; read its current value from the governance parameters API rather than assuming the default.

Your wallet address: .human

A .human address is computed from your public key, so nobody can register it and nobody else can own it.

1. The seed words are lower-cased and joined with single spaces.
2. seed = SHA3-256("NC_KDF_v3|" + words) — 32 bytes.
3. The seed generates an ML-DSA-65 keypair (Dilithium3, FIPS 204).
4. address = "neuro:" + first 15 hex characters of SHA3-256(public key) + ".human".

The same keypair both defines the address and signs every transaction. Your password only encrypts the seed in the browser's keystore; it plays no part in the address or the key.

Ownership proof. To accept a signed operation for a .human address, the node recomputes the address from the public key sent with it. If they do not match, the operation is rejected — no registry, no "first key wins".

Custom .human names

A wallet can also register a readable name such as neuro:alice.human. The name is recorded on chain as owned by your key-derived wallet; transfers still settle on the key-derived address. Price depends on length — see below.

Paid names: .node, .app, .vault, .agent

A paid name has no key of its own. It is controlled by the key of the .human wallet that owns it. When the owner rotates keys through an identity, control follows.

Type	What registration does
.node	Debits min_stake from the owner and records it as the validator's stake (unbonding applies). Default commission 10%. Only .node addresses are consensus validators.
.app	Debits min_stake and burns it, reserving a readable contract name. (A deployed contract always gets an address of its own — see below.)
.vault	Debits min_stake, burns it, and creates a vault with the owner as its first member and a threshold of 2 signatures.
.agent	Debits the length-based fee and records an agent smart account. Not a validator, holds no stake.

Contract addresses from deploy

Every deploy creates its contract at neuro:<10 hex>.app, where the hex is the first 5 bytes of SHA3-256(owner ‖ nonce) (nonce as 8 big-endian bytes). The address is computed the same way on every validator, so it is known before the deploy is final. See Deploy contracts.

Transferring a paid name to another owner costs a flat 100 uNRO (NFT_TRANSFER_FEE). The current value is also returned by GET /api/v1/gas/estimate as nft_transfer_fee.

Name prices

Custom .human names and .agent addresses are priced by length — shorter is rarer, so it costs more.

Name length	Price
1 character	100 000 NRO
2 characters	50 000 NRO
3 characters	10 000 NRO
4 characters	5 000 NRO
5 characters	2 000 NRO
6 or more	500 NRO

Naming rules

These apply to every registered name:

• ASCII letters, digits and hyphens only.
• 1 to 32 characters.
• No hyphen at the start or the end.
• The full address must start with neuro:.
• Uniqueness is by full address: neuro:foo.node, neuro:foo.app and neuro:foo.agent can all exist and belong to different owners. A custom .human name may not take a name already used by a .node.

System addresses

Addresses under neuro:system.* are reserved by the protocol. They are targets of signed operations (neuro:system.stake, neuro:system.node, neuro:system.name, neuro:system.deploy, …) rather than accounts anyone owns.

See also

• Identity — rotating and recovering the keys behind an address.
• Gas & fees — what each operation costs.