An Indexer runs Graph Node and related payment software, self-stakes at least 100,000 GRT under current documentation, selects deployments and submits Proofs of Indexing. Curators create signal on subgraphs to guide indexing and participate in query fees. Delegators increase an Indexer's productive stake and receive the portion of rewards and fees set by that Indexer, with a 28-day undelegation period under Horizon. These are exposed positions: Indexer stake can be slashed, delegation returns vary, and curation depends on query demand.
GRT began with 10 billion units and a target 3% annual issuance for indexing rewards. Burns offset part of issuance through taxes, fees and penalties. The rule set has changed: the former 0.5% delegation tax was removed permanently by Horizon, although an older official tokenomics overview still lists it. Current parameters should therefore be read from live Horizon documentation and contracts, not assumed from launch-era summaries.
The protocol now operates principally on Arbitrum One. The published deployment includes a Controller, GraphProxyAdmin, HorizonStaking, RewardsManager, payment escrow, token gateway and L2 GRT contract 0x9623063377AD1B27544C965cCd7342f7EA7e88C7. The Council can approve upgrades, parameter changes and emergency action. That governance makes repairs possible, while also placing material technical and monetary choices beyond an ordinary holder's unilateral control.