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All staking participants on Autheo Chain must hold an on-chain license record before operating a validator or delegating. Licenses originate as ERC-721 NFTs on Arbitrum and are bridged automatically when transferred to your Autheo Chain EVM address.

Before you start

Before purchasing and setting up a license, make sure you have:
  1. MetaMask configured for Arbitrum One. The Node Sale uses Arbitrum One for license purchases.
  2. ETH on Arbitrum One. You need ETH on Arbitrum to pay for the node license.
  3. ARB on Arbitrum One for transaction fees. Keep a small amount of ARB available to pay network gas fees.
  4. A wallet address that you control. You will use your wallet to purchase, bridge, and manage the license.
  5. The appropriate license tier selected. Choose a Sovereign license if you are operating a validator. Choose a Prime or Core license if you are delegating to an existing validator.
For details on purchasing a license, see Purchasing a license.

License tiers

Important: Sovereign licenses and Prime/Core licenses serve different purposes. A Sovereign license is used by the operator of a validator. Prime and Core licenses are used for delegation to an existing validator and do not create or operate a validator themselves.Only one Sovereign license can bind to a given validator at any time. This enforces a strict 1:1 relationship between Sovereign licenses and validators.

Step 1: Acquire the NFT on Arbitrum

Purchase the appropriate ERC-721 license NFT on the Node Sale Platform. The license NFT is purchased on Arbitrum One. Before starting the purchase, make sure MetaMask is connected to Arbitrum One and that your wallet contains the required ETH on Arbitrum for the purchase and a small amount of ARB for transaction fees. View contract addresses:
Next step: After purchasing the license NFT on Arbitrum One, you must transfer it to your Autheo Chain EVM address using the Autheo Bridge. The license is not ready for binding until the bridge process creates the corresponding license record on Autheo Chain.

Step 2: Transfer to your Autheo Chain EVM address

Use the Autheo Bridge to transfer the license NFT from Arbitrum One to your Autheo Chain EVM address (0x... format). The bridge creates the corresponding LicenseRecord on Autheo Chain with an initial status of ISSUED. No separate license-record transaction is required.

Step 3: Verify the license record

You should see status: ISSUED.

Step 4: Bind the license

Sovereign license

A Sovereign license is used by a validator operator. When binding a Sovereign license, the validator address is derived from your operator key.
The validator address is derived automatically from your operator key.
Why do you need to select a validator? Prime and Core licenses are used for delegation rather than operating a validator. When you bind one, you must associate it with an existing eligible validator. The validator must be bonded and not jailed.

Step 5: Verify BOUND status

Confirm status: BOUND.
  • Sovereign: The license is ready to be used for validator creation.
  • Prime/Core: The license is ready to be used for delegation to the selected validator.

License status after binding

Claiming NFT rewards

Once ACTIVE, the license accrues NFT rewards. These rewards are separate from staking rewards and must be claimed manually.
See NFT rewards for full details.