Solana Block-Space Marketplace GBX Launches on Mainnet, Connects Validators With 5% of Stake

According to ChainCatcher, Solana block-space marketplace Gravity Block Exchange (GBX) has launched on mainnet, connecting validators representing about 5% of total stake. GBX says rewards are 20% to 30% above the cluster average. Two independent block builders participate in each auction round: Bifrost from Astralane and Titan Builder from Gattaca. Validators can connect through the Gravity Connector sidecar without a custom validator fork; Agave and Jito-Solana are supported, while Firedancer support is under development. If the external ordering path is unavailable, validators can fall back to the native scheduler.