NOTA Token
TheNOTA token (Solidity name NotareumNOTAToken) is the ERC-20 utility and governance asset of the Notareum protocol. It pays registration and verification fees, collateralizes validator stakes, and, when locked as veNOTA, confers governance and reward-boost rights. The contract is a standard OpenZeppelin ERC-20 implementation with the IERC-2612 permit extension and governance-gated mint and burn controls.
Key properties
- Name:
Notareum - Symbol:
NOTA - Decimals:
18 - Total supply cap:
1,000,000,000 NOTA(enforced at contract level) - Post-genesis mint: governance-only, delay-gated
- Burn: permissionless (
burn) and governance (burnFrom) - Permit: EIP-2612 gasless approvals
- Votes extension: off (voting is via veNOTA, not raw NOTA)
Inheritance
AccessManagedUpgradeable ties mint/upgrade authority to the central AccessManager; no local roles are defined.
Initialization
genesisRecipient, typically a timelocked multisig that fans out to the allocations (validators, ecosystem, team, treasury). No further mints are possible until governance explicitly schedules one.
Public interface
ERC-20 surface
Standard:transfer, transferFrom, approve, allowance, balanceOf, totalSupply.
ERC-2612 permit
permit and the subsequent action (stake, pay fee) in a single transaction. The SDK wraps this in a permitAndCall helper.
Burn
burnFrom requires allowance. The contract also exposes a protocol-burn path:
FEE_MANAGER role (held by FeeManager) to implement fee burns without needing holder consent (used for fees the contract collected in its own balance).
Mint (post-launch)
MINTER role, which is held by the treasury timelock and only grantable by a successful governance proposal. The total supply cap is enforced inside mint:
Access control summary
The
FEE_MANAGER wiring is set once during initialization and cannot be changed without upgrading the implementation. This constrains the contract’s trust surface: the only entity that can burn from arbitrary addresses is the FeeManager contract itself.
Allocation (illustrative)
The initial 1B NOTA supply distributes across buckets. Exact amounts are governance-ratified at genesis; the following reflects the default distribution described in the whitepaper:
All vesting schedules live in separate
NotareumVestingVault instances parameterized at deployment. The token contract itself holds no custody logic.
Events
Standard ERC-20Transfer and Approval plus:
SDK usage
Governance interaction
Mint and upgrade operations require a complete governance cycle:- Proposal submitted via veNOTA voting.
- Proposal succeeds and enters the execution queue.
AccessManagertimelock runs for 14 days.- Execution transaction lands on-chain.
Invariants
totalSupply() <= MAX_SUPPLYat all times.- Only addresses granted the
MINTERrole can callmint; the role itself is only reachable through a 14-day timelock. protocolBurnis callable only byFeeManagerand only against the contract’s own balance or approved balances.transferFromfrom a zero-approval state reverts (standard ERC-20 semantics).

